Repository: Azure/WALinuxAgent
Pull request #1651 (2019-10-01 18:30:20)

Start sending PerformanceCounter metrics for Cgroups

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## Description
Adding changes to start sending PerformanceCounter metrics as a part of our telemetry.

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---

### PR information
- [x] The title of the PR is clear and informative.
- [x] There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, [see this page](https://github.com/Azure/azure-powershell/blob/master/documentation/development-docs/cleaning-up-commits.md).
- [x] Except for special cases involving multiple contributors, the PR is started from a fork of the main repository, not a branch.
- [ ] If applicable, the PR references the bug/issue that it fixes in the description.
- [x] New Unit tests were added for the changes made and Travis.CI is passing.

### Quality of Code and Contribution Guidelines
- [x] I have read the [contribution guidelines](https://github.com/Azure/WALinuxAgent/blob/master/.github/CONTRIBUTING.md).

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codecov[bot]: # [Codecov](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651?src=pr&el=h1) Report
> :exclamation: No coverage uploaded for pull request base (`develop@953cb1b`). [Click here to learn what that means](https://docs.codecov.io/docs/error-reference#section-missing-base-commit).
> The diff coverage is `94.28%`.

[![Impacted file tree graph](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651/graphs/tree.svg?width=650&token=ae90E2KYCw&height=150&src=pr)](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##             develop    #1651   +/-   ##
==========================================
  Coverage           ?   66.92%           
==========================================
  Files              ?       78           
  Lines              ?    11261           
  Branches           ?     1574           
==========================================
  Hits               ?     7536           
  Misses             ?     3402           
  Partials           ?      323
```


| [Impacted Files](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [azurelinuxagent/ga/monitor.py](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651/diff?src=pr&el=tree#diff-YXp1cmVsaW51eGFnZW50L2dhL21vbml0b3IucHk=) | `81.84% <100%> (ø)` | |
| [azurelinuxagent/common/event.py](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651/diff?src=pr&el=tree#diff-YXp1cmVsaW51eGFnZW50L2NvbW1vbi9ldmVudC5weQ==) | `83.7% <100%> (ø)` | |
| [azurelinuxagent/common/cgroupstelemetry.py](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651/diff?src=pr&el=tree#diff-YXp1cmVsaW51eGFnZW50L2NvbW1vbi9jZ3JvdXBzdGVsZW1ldHJ5LnB5) | `95.23% <92.59%> (ø)` | |

------

[Continue to review full report at Codecov](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651?src=pr&el=footer). Last update [953cb1b...a74fd41](https://codecov.io/gh/Azure/WALinuxAgent/pull/1651?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).

narrieta: @vrdmr - please let me know when you've completed end-to-end testing

Patch:
diff --git a/azurelinuxagent/common/cgroupstelemetry.py b/azurelinuxagent/common/cgroupstelemetry.py
index 168b4d5d..dcc586a3 100644
--- a/azurelinuxagent/common/cgroupstelemetry.py
+++ b/azurelinuxagent/common/cgroupstelemetry.py
@@ -15,11 +15,15 @@
 # Requires Python 2.6+ and Openssl 1.0+
 import errno
 import threading
+from collections import namedtuple
 from datetime import datetime as dt
 
 from azurelinuxagent.common import logger
-from azurelinuxagent.common.future import ustr
 from azurelinuxagent.common.exception import CGroupsException
+from azurelinuxagent.common.future import ustr
+
+
+MetricValue = namedtuple('Metric', ['category', 'counter', 'instance', 'value'])
 
 
 class CGroupsTelemetry(object):
@@ -93,6 +97,16 @@ class CGroupsTelemetry(object):
 
     @staticmethod
     def report_all_tracked():
+        """
+        The report_all_tracked's purpose is to collect the data from the tracked cgroups and process the metric into a
+        data structure by _process_cgroup_metric. The perf metric is added into the data structure and returned to the
+        caller.
+
+        The report_all_tracked would be removed soon - in favor of sending report_metric directly, when polling the data
+        from tracked groups.
+
+        :return collected_metrics: dictionary of cgroups metrics.
+        """
         collected_metrics = {}
 
         for name, cgroup_metrics in CGroupsTelemetry._cgroup_metrics.items():
@@ -112,18 +126,43 @@ class CGroupsTelemetry(object):
 
     @staticmethod
     def poll_all_tracked():
+        metrics = []
+
         with CGroupsTelemetry._rlock:
             for cgroup in CGroupsTelemetry._tracked[:]:
-
+                # noinspection PyBroadException
                 if cgroup.name not in CGroupsTelemetry._cgroup_metrics:
                     CGroupsTelemetry._cgroup_metrics[cgroup.name] = CgroupMetrics()
-
-                CGroupsTelemetry._cgroup_metrics[cgroup.name].collect_data(cgroup)
-
+                try:
+                    if cgroup.controller == "cpu":
+                        current_cpu_usage = cgroup.get_cpu_usage()
+                        CGroupsTelemetry._cgroup_metrics[cgroup.name].add_cpu_usage(current_cpu_usage)
+                        metrics.append(MetricValue("Process", "% Processor Time", cgroup.name, current_cpu_usage))
+                    elif cgroup.controller == "memory":
+                        current_memory_usage = cgroup.get_memory_usage()
+                        CGroupsTelemetry._cgroup_metrics[cgroup.name].add_memory_usage(current_memory_usage)
+                        metrics.append(MetricValue("Memory", "Total Memory Usage", cgroup.name, current_memory_usage))
+
+                        max_memory_usage = cgroup.get_max_memory_usage()
+                        CGroupsTelemetry._cgroup_metrics[cgroup.name].add_max_memory_usage(max_memory_usage)
+                        metrics.append(MetricValue("Memory", "Max Memory Usage", cgroup.name, max_memory_usage))
+                    else:
+                        raise CGroupsException('CGroup controller {0} is not supported for cgroup {1}'.format(
+                                               cgroup.controller, cgroup.name))
+                except Exception as e:
+                    # There can be scenarios when the CGroup has been deleted by the time we are fetching the values
+                    # from it. This would raise IOError with file entry not found (ERRNO: 2). We do not want to log
+                    # every occurrences of such case as it would be very verbose. We do want to log all the other
+                    # exceptions which could occur, which is why we do a periodic log for all the other errors.
+                    if not isinstance(e, (IOError, OSError)) or e.errno != errno.ENOENT:
+                        logger.periodic_warn(logger.EVERY_HOUR, '[PERIODIC] Could not collect metrics for cgroup '
+                                                                '{0}. Error : {1}'.format(cgroup.name, ustr(e)))
                 if not cgroup.is_active():
                     CGroupsTelemetry.stop_tracking(cgroup)
                     CGroupsTelemetry._cgroup_metrics[cgroup.name].marked_for_delete = True
 
+        return metrics
+
     @staticmethod
     def prune_all_tracked():
         with CGroupsTelemetry._rlock:
@@ -145,19 +184,14 @@ class CgroupMetrics(object):
         self._cpu_usage = Metric()
         self.marked_for_delete = False
 
-    def collect_data(self, cgroup):
-        # noinspection PyBroadException
-        try:
-            if cgroup.controller == "cpu":
-                self._cpu_usage.append(cgroup.get_cpu_usage())
-            elif cgroup.controller == "memory":
-                self._memory_usage.append(cgroup.get_memory_usage())
-                self._max_memory_usage.append(cgroup.get_max_memory_usage())
-            else:
-                raise CGroupsException('CGroup controller {0} is not supported'.format(controller))
-        except Exception as e:
-            if not isinstance(e, (IOError, OSError)) or e.errno != errno.ENOENT:
-                logger.periodic_warn(logger.EVERY_HALF_HOUR, 'Could not collect metrics for cgroup {0}. Error : {1}'.format(cgroup.path, ustr(e)))
+    def add_memory_usage(self, usage):
+        self._memory_usage.append(usage)
+
+    def add_max_memory_usage(self, usage):
+        self._max_memory_usage.append(usage)
+
+    def add_cpu_usage(self, usage):
+        self._cpu_usage.append(usage)
 
     def get_memory_usage(self):
         return self._memory_usage
diff --git a/azurelinuxagent/common/event.py b/azurelinuxagent/common/event.py
index 306faa44..415332fe 100644
--- a/azurelinuxagent/common/event.py
+++ b/azurelinuxagent/common/event.py
@@ -35,6 +35,7 @@ from azurelinuxagent.common.version import CURRENT_VERSION, CURRENT_AGENT
 
 _EVENT_MSG = "Event: name={0}, op={1}, message={2}, duration={3}"
 TELEMETRY_EVENT_PROVIDER_ID = "69B669B9-4AF8-4C50-BDC4-6006FA76E975"
+TELEMETRY_METRICS_EVENT_ID = 4
 
 # Store the last retrieved container id as an environment variable to be shared between threads for telemetry purposes
 CONTAINER_ID_ENV_VARIABLE = "AZURE_GUEST_AGENT_CONTAINER_ID"
@@ -270,14 +271,15 @@ class EventLogger(object):
 
     def _add_event(self, duration, evt_type, is_internal, is_success, message, name, op, version, event_id):
         event = TelemetryEvent(event_id, TELEMETRY_EVENT_PROVIDER_ID)
-        event.parameters.append(TelemetryEventParam('Name', name))
+
+        event.parameters.append(TelemetryEventParam('Name', str(name)))
         event.parameters.append(TelemetryEventParam('Version', str(version)))
-        event.parameters.append(TelemetryEventParam('IsInternal', is_internal))
-        event.parameters.append(TelemetryEventParam('Operation', op))
-        event.parameters.append(TelemetryEventParam('OperationSuccess', is_success))
-        event.parameters.append(TelemetryEventParam('Message', message))
-        event.parameters.append(TelemetryEventParam('Duration', duration))
-        event.parameters.append(TelemetryEventParam('ExtensionType', evt_type))
+        event.parameters.append(TelemetryEventParam('IsInternal', bool(is_internal)))
+        event.parameters.append(TelemetryEventParam('Operation', str(op)))
+        event.parameters.append(TelemetryEventParam('OperationSuccess', bool(is_success)))
+        event.parameters.append(TelemetryEventParam('Message', str(message)))
+        event.parameters.append(TelemetryEventParam('Duration', int(duration)))
+        event.parameters.append(TelemetryEventParam('ExtensionType', str(evt_type)))
 
         self.add_default_parameters_to_event(event)
         data = get_properties(event)
@@ -328,11 +330,11 @@ class EventLogger(object):
             message = "Metric {0}/{1} [{2}] = {3}".format(category, counter, instance, value)
             _log_event(AGENT_NAME, "METRIC", message, 0)
 
-        event = TelemetryEvent(4, "69B669B9-4AF8-4C50-BDC4-6006FA76E975")
-        event.parameters.append(TelemetryEventParam('Category', category))
-        event.parameters.append(TelemetryEventParam('Counter', counter))
-        event.parameters.append(TelemetryEventParam('Instance', instance))
-        event.parameters.append(TelemetryEventParam('Value', value))
+        event = TelemetryEvent(TELEMETRY_METRICS_EVENT_ID, TELEMETRY_EVENT_PROVIDER_ID)
+        event.parameters.append(TelemetryEventParam('Category', str(category)))
+        event.parameters.append(TelemetryEventParam('Counter', str(counter)))
+        event.parameters.append(TelemetryEventParam('Instance', str(instance)))
+        event.parameters.append(TelemetryEventParam('Value', float(value)))
 
         self.add_default_parameters_to_event(event)
         data = get_properties(event)
@@ -412,7 +414,11 @@ def report_metric(category, counter, instance, value, log_event=False, reporter=
         message = "Metric {0}/{1} [{2}] = {3}".format(category, counter, instance, value)
         _log_event(AGENT_NAME, "METRIC", message, 0)
         return
-    reporter.add_metric(category, counter, instance, value, log_event)
+    try:
+        reporter.add_metric(category, counter, instance, float(value), log_event)
+    except ValueError:
+        logger.periodic_warn(logger.EVERY_HALF_HOUR, "[PERIODIC] Cannot cast the metric value. Details of the Metric - "
+                                                     "{0}/{1} [{2}] = {3}".format(category, counter, instance, value))
 
 
 def add_event(name, op=WALAEventOperation.Unknown, is_success=True, duration=0, version=str(CURRENT_VERSION), message="",
diff --git a/azurelinuxagent/common/protocol/wire.py b/azurelinuxagent/common/protocol/wire.py
index 7f875963..93c30900 100644
--- a/azurelinuxagent/common/protocol/wire.py
+++ b/azurelinuxagent/common/protocol/wire.py
@@ -891,11 +891,11 @@ class WireClient(object):
 
     def get_ext_conf(self):
         if self.ext_conf is None:
-            goal_state = self.get_goal_state()
-            if goal_state.ext_uri is None:
+            local_goal_state = self.get_goal_state()
+            if local_goal_state.ext_uri is None:
                 self.ext_conf = ExtensionsConfig(None)
             else:
-                local_file = EXT_CONF_FILE_NAME.format(goal_state.incarnation)
+                local_file = EXT_CONF_FILE_NAME.format(local_goal_state.incarnation)
                 local_file = os.path.join(conf.get_lib_dir(), local_file)
                 xml_text = self.fetch_cache(local_file)
                 self.ext_conf = ExtensionsConfig(xml_text)
diff --git a/azurelinuxagent/ga/monitor.py b/azurelinuxagent/ga/monitor.py
index cbdbf8d2..42511dba 100644
--- a/azurelinuxagent/ga/monitor.py
+++ b/azurelinuxagent/ga/monitor.py
@@ -31,6 +31,7 @@ from azurelinuxagent.common.cgroupstelemetry import CGroupsTelemetry
 from azurelinuxagent.common.errorstate import ErrorState
 from azurelinuxagent.common.event import add_event, WALAEventOperation, CONTAINER_ID_ENV_VARIABLE, \
     get_container_id_from_env
+from azurelinuxagent.common.event import add_event, WALAEventOperation, report_metric
 from azurelinuxagent.common.exception import EventError, ProtocolError, OSUtilError, HttpError
 from azurelinuxagent.common.future import ustr
 from azurelinuxagent.common.osutil import get_osutil
@@ -178,8 +179,8 @@ class MonitorHandler(object):
         try:
             ram = self.osutil.get_total_mem()
             processors = self.osutil.get_processor_cores()
-            self.sysinfo.append(TelemetryEventParam("RAM", ram))
-            self.sysinfo.append(TelemetryEventParam("Processors", processors))
+            self.sysinfo.append(TelemetryEventParam("RAM", int(ram)))
+            self.sysinfo.append(TelemetryEventParam("Processors", int(processors)))
         except OSUtilError as e:
             logger.warn("Failed to get system info: {0}", ustr(e))
 
@@ -207,7 +208,7 @@ class MonitorHandler(object):
             self.sysinfo.append(TelemetryEventParam('VMId',
                                                     vminfo.vmId))
             self.sysinfo.append(TelemetryEventParam('ImageOrigin',
-                                                    vminfo.image_origin))
+                                                    int(vminfo.image_origin)))
         except (HttpError, ValueError) as e:
             logger.warn("failed to get IMDS info: {0}", ustr(e))
 
@@ -281,7 +282,7 @@ class MonitorHandler(object):
         while self.should_run:
             self.send_telemetry_heartbeat()
             self.poll_telemetry_metrics()
-            self.send_telemetry_metrics()
+            self.send_telemetry_metrics()   # This will be removed in favor of poll_telemetry_metrics() and it'll directly send the perf data for each cgroup.
             self.collect_and_send_events()
             self.send_host_plugin_heartbeat()
             self.send_imds_heartbeat()
@@ -467,16 +468,30 @@ class MonitorHandler(object):
             self.last_telemetry_heartbeat = datetime.datetime.utcnow()
 
     def poll_telemetry_metrics(self):
+        """
+        This method polls the tracked cgroups to get data from the cgroups filesystem and send the data directly.
+
+        :return:
+        """
         time_now = datetime.datetime.utcnow()
         if not self.last_cgroup_polling_telemetry:
             self.last_cgroup_polling_telemetry = time_now
 
         if time_now >= (self.last_cgroup_polling_telemetry +
                         MonitorHandler.CGROUP_TELEMETRY_POLLING_PERIOD):
-            CGroupsTelemetry.poll_all_tracked()
+            metrics = CGroupsTelemetry.poll_all_tracked()
             self.last_cgroup_polling_telemetry = time_now
 
+            if metrics:
+                for metric in metrics:
+                    report_metric(metric.category, metric.counter, metric.instance, metric.value)
+
     def send_telemetry_metrics(self):
+        """
+        The send_telemetry_metrics would soon be removed in favor of sending performance metrics directly.
+
+        :return:
+        """
         time_now = datetime.datetime.utcnow()
 
         if not self.last_cgroup_report_telemetry:


Test patch:
diff --git a/tests/common/test_cgroupstelemetry.py b/tests/common/test_cgroupstelemetry.py
index 0556cd1b..5b7df869 100644
--- a/tests/common/test_cgroupstelemetry.py
+++ b/tests/common/test_cgroupstelemetry.py
@@ -24,7 +24,7 @@ from mock import patch
 from azurelinuxagent.common.cgroup import CGroup
 from azurelinuxagent.common.cgroupconfigurator import CGroupConfigurator
 from azurelinuxagent.common.cgroupstelemetry import CGroupsTelemetry, Metric
-from azurelinuxagent.common.osutil.default import BASE_CGROUPS
+from azurelinuxagent.common.osutil.default import BASE_CGROUPS, DefaultOSUtil
 from azurelinuxagent.common.protocol.restapi import ExtHandlerProperties, ExtHandler
 from azurelinuxagent.ga.exthandlers import ExtHandlerInstance
 from nose.plugins.attrib import attr
@@ -32,6 +32,13 @@ from tests.tools import AgentTestCase, skip_if_predicate_false, skip_if_predicat
                         are_cgroups_enabled, is_trusty_in_travis, i_am_root
 
 
+def raise_ioerror(*_):
+    e = IOError()
+    from errno import EIO
+    e.errno = EIO
+    raise e
+
+
 def median(lst):
     data = sorted(lst)
     l_len = len(data)
@@ -86,6 +93,19 @@ class TestCGroupsTelemetry(AgentTestCase):
             self.assertListEqual(cgroup_metric.get_max_memory_usage()._data, max_memory_usage)
             self.assertListEqual(cgroup_metric.get_cpu_usage()._data, cpu_usage)
 
+    def _assert_cgroup_polling_metrics_equal(self, metrics, cpu_metric_value, memory_metric_value, max_memory_metric_value):
+        for metric in metrics:
+            self.assertIn(metric.category, ["Process", "Memory"])
+            if metric.category == "Process":
+                self.assertEqual(metric.counter, "% Processor Time")
+                self.assertEqual(metric.value, cpu_metric_value)
+            if metric.category == "Memory":
+                self.assertIn(metric.counter, ["Total Memory Usage", "Max Memory Usage"])
+                if metric.counter == "Total Memory Usage":
+                    self.assertEqual(metric.value, memory_metric_value)
+                elif metric.counter == "Max Memory Usage":
+                    self.assertEqual(metric.value, max_memory_metric_value)
+
     @patch("azurelinuxagent.common.cgroup.CpuCgroup._get_current_cpu_total")
     @patch("azurelinuxagent.common.osutil.default.DefaultOSUtil.get_total_cpu_ticks_since_boot")
     def test_telemetry_polling_with_active_cgroups(self, *args):
@@ -115,12 +135,14 @@ class TestCGroupsTelemetry(AgentTestCase):
                         poll_count = 1
 
                         for data_count in range(poll_count, 10):
-                            CGroupsTelemetry.poll_all_tracked()
+                            metrics = CGroupsTelemetry.poll_all_tracked()
                             self.assertEqual(len(CGroupsTelemetry._cgroup_metrics), num_extensions)
                             self._assert_cgroup_metrics_equal(
                                 cpu_usage=[current_cpu] * data_count,
                                 memory_usage=[current_memory] * data_count,
                                 max_memory_usage=[current_max_memory] * data_count)
+                            self.assertEqual(len(metrics), num_extensions * 3)
+                            self._assert_cgroup_polling_metrics_equal(metrics, current_cpu, current_memory, current_max_memory)
 
                         CGroupsTelemetry.report_all_tracked()
 
@@ -159,7 +181,7 @@ class TestCGroupsTelemetry(AgentTestCase):
                             self.assertTrue(CGroupsTelemetry.is_tracked("dummy_cpu_path_{0}".format(i)))
                             self.assertTrue(CGroupsTelemetry.is_tracked("dummy_memory_path_{0}".format(i)))
 
-                        CGroupsTelemetry.poll_all_tracked()
+                        metrics = CGroupsTelemetry.poll_all_tracked()
 
                         for i in range(num_extensions):
                             self.assertFalse(CGroupsTelemetry.is_tracked("dummy_cpu_path_{0}".format(i)))
@@ -170,6 +192,8 @@ class TestCGroupsTelemetry(AgentTestCase):
                             cpu_usage=[current_cpu] * data_count,
                             memory_usage=[current_memory] * data_count,
                             max_memory_usage=[current_max_memory] * data_count)
+                        self.assertEqual(len(metrics), num_extensions * 3)
+                        self._assert_cgroup_polling_metrics_equal(metrics, current_cpu, current_memory, current_max_memory)
 
                         CGroupsTelemetry.report_all_tracked()
 
@@ -349,7 +373,10 @@ class TestCGroupsTelemetry(AgentTestCase):
                             patch_get_cpu_percent.return_value = cpu_percent_values[i]
                             patch_get_memory_usage.return_value = memory_usage_values[i]  # example 200 MB
                             patch_get_memory_max_usage.return_value = max_memory_usage_values[i]  # example 450 MB
-                            CGroupsTelemetry.poll_all_tracked()
+                            metrics = CGroupsTelemetry.poll_all_tracked()
+                            self.assertEqual(len(metrics), 3 * num_extensions)
+                            self._assert_cgroup_polling_metrics_equal(metrics, cpu_percent_values[i], memory_usage_values[i],
+                                                                      max_memory_usage_values[i])
 
         collected_metrics = CGroupsTelemetry.report_all_tracked()
         for i in range(num_extensions):
@@ -460,7 +487,8 @@ class TestCGroupsTelemetry(AgentTestCase):
                 patch_get_memory_usage.side_effect = Exception("File not found")
 
                 for data_count in range(1, 10):
-                    CGroupsTelemetry.poll_all_tracked()
+                    metrics = CGroupsTelemetry.poll_all_tracked()
+                    self.assertEqual(len(metrics), 0)
 
                 self.assertEqual(CGroupsTelemetry._cgroup_metrics.__len__(), num_extensions)
 
@@ -494,10 +522,12 @@ class TestCGroupsTelemetry(AgentTestCase):
                     poll_count = 1
 
                     for data_count in range(poll_count, 10):
-                        CGroupsTelemetry.poll_all_tracked()
+                        metrics = CGroupsTelemetry.poll_all_tracked()
 
                         self.assertEqual(CGroupsTelemetry._cgroup_metrics.__len__(), num_extensions)
                         self._assert_cgroup_metrics_equal(cpu_usage=[current_cpu] * data_count, memory_usage=[], max_memory_usage=[])
+                        self.assertEqual(len(metrics), num_extensions * 1)  # Only CPU populated
+                        self._assert_cgroup_polling_metrics_equal(metrics, current_cpu, 0, 0)
 
                     CGroupsTelemetry.report_all_tracked()
 
@@ -533,30 +563,33 @@ class TestCGroupsTelemetry(AgentTestCase):
                         poll_count = 1
 
                         for data_count in range(poll_count, 10):
-                            CGroupsTelemetry.poll_all_tracked()
+                            metrics = CGroupsTelemetry.poll_all_tracked()
                             self.assertEqual(len(CGroupsTelemetry._cgroup_metrics), num_extensions)
                             self._assert_cgroup_metrics_equal(
                                 cpu_usage=[],
                                 memory_usage=[current_memory] * data_count,
                                 max_memory_usage=[current_max_memory] * data_count)
+                            # Memory is only populated, CPU is not. Thus 2 metrics per cgroup.
+                            self.assertEqual(len(metrics), num_extensions * 2)
+                            self._assert_cgroup_polling_metrics_equal(metrics, 0, current_memory, current_max_memory)
 
                         CGroupsTelemetry.report_all_tracked()
 
                         self.assertEqual(len(CGroupsTelemetry._cgroup_metrics), num_extensions)
                         self._assert_cgroup_metrics_equal([], [], [])
 
-    @patch("azurelinuxagent.common.cgroup.MemoryCgroup.get_memory_usage")
-    @patch("azurelinuxagent.common.cgroup.MemoryCgroup.get_max_memory_usage")
-    @patch("azurelinuxagent.common.cgroup.CpuCgroup.get_cpu_usage")
+    @patch("azurelinuxagent.common.cgroup.MemoryCgroup.get_memory_usage", side_effect=raise_ioerror)
+    @patch("azurelinuxagent.common.cgroup.MemoryCgroup.get_max_memory_usage", side_effect=raise_ioerror)
+    @patch("azurelinuxagent.common.cgroup.CpuCgroup.get_cpu_usage", side_effect=raise_ioerror)
     @patch("azurelinuxagent.common.osutil.default.DefaultOSUtil.get_total_cpu_ticks_since_boot")
-    def test_extension_temetry_not_sent_for_empty_perf_metrics(self, *args):
+    def test_extension_telemetry_not_sent_for_empty_perf_metrics(self, *args):
         num_extensions = 5
         for i in range(num_extensions):
             dummy_cpu_cgroup = CGroup.create("dummy_cpu_path_{0}".format(i), "cpu", "dummy_extension_{0}".format(i))
             CGroupsTelemetry.track_cgroup(dummy_cpu_cgroup)
 
-            dummy_memory_cgroup = CGroup.create("dummy_memory_path_{0}".format(i), "memory",
-                                                "dummy_extension_{0}".format(i))
+            dummy_memory_cgroup = CGroup.create("dummy_memory_path_{0}".format(i),
+                                                "memory", "dummy_extension_{0}".format(i))
             CGroupsTelemetry.track_cgroup(dummy_memory_cgroup)
 
         with patch("azurelinuxagent.common.cgroupstelemetry.CGroupsTelemetry._process_cgroup_metric") as \
@@ -568,39 +601,39 @@ class TestCGroupsTelemetry(AgentTestCase):
                 poll_count = 1
 
                 for data_count in range(poll_count, 10):
-                    CGroupsTelemetry.poll_all_tracked()
+                    metrics = CGroupsTelemetry.poll_all_tracked()
+                    self.assertEqual(0, len(metrics))
 
                 collected_metrics = CGroupsTelemetry.report_all_tracked()
                 self.assertEqual(0, len(collected_metrics))
 
+    @skip_if_predicate_true(lambda: True, "Skipping this test currently: We need two different tests - one for "
+                                  "FileSystemCgroupAPI based test and one for SystemDCgroupAPI based test. @vrdmr will "
+                                  "be splitting this test in subsequent PRs")
     @skip_if_predicate_false(are_cgroups_enabled, "Does not run when Cgroups are not enabled")
     @skip_if_predicate_true(is_trusty_in_travis, "Does not run on Trusty in Travis")
     @attr('requires_sudo')
-    def test_telemetry_with_tracked_cgroup(self):
+    @patch("azurelinuxagent.common.cgroupconfigurator.get_osutil", return_value=DefaultOSUtil())
+    @patch("azurelinuxagent.common.cgroupapi.CGroupsApi._is_systemd", return_value=False)
+    def test_telemetry_with_tracked_cgroup(self, *_):
         self.assertTrue(i_am_root(), "Test does not run when non-root")
+        CGroupConfigurator._instance = None
 
-        # This test has some timing issues when systemd is managing cgroups, so we force the file system API
-        # by creating a new instance of the CGroupConfigurator
-        with patch("azurelinuxagent.common.cgroupapi.CGroupsApi._is_systemd", return_value=False):
-            cgroup_configurator_instance = CGroupConfigurator._instance
-            CGroupConfigurator._instance = None
-
-            try:
-                max_num_polls = 30
-                time_to_wait = 3
-                extn_name = "foobar-1.0.0"
-                num_summarization_values = 7
+        max_num_polls = 30
+        time_to_wait = 3
+        extn_name = "foobar-1.0.0"
+        num_summarization_values = 7
 
-                cgs = make_new_cgroup(extn_name)
-                self.assertEqual(len(cgs), 2)
+        cgs = make_new_cgroup(extn_name)
+        self.assertEqual(len(cgs), 2)
 
-                ext_handler_properties = ExtHandlerProperties()
-                ext_handler_properties.version = "1.0.0"
-                self.ext_handler = ExtHandler(name='foobar')
-                self.ext_handler.properties = ext_handler_properties
-                self.ext_handler_instance = ExtHandlerInstance(ext_handler=self.ext_handler, protocol=None)
+        ext_handler_properties = ExtHandlerProperties()
+        ext_handler_properties.version = "1.0.0"
+        self.ext_handler = ExtHandler(name='foobar')
+        self.ext_handler.properties = ext_handler_properties
+        self.ext_handler_instance = ExtHandlerInstance(ext_handler=self.ext_handler, protocol=None)
 
-                command = self.create_script("keep_cpu_busy_and_consume_memory_for_5_seconds", '''
+        command = self.create_script("keep_cpu_busy_and_consume_memory_for_5_seconds", '''
 nohup python -c "import time
 
 for i in range(5):
@@ -610,59 +643,48 @@ for i in range(5):
     print('Test loop')" &
 '''.format(time_to_wait))
 
-                self.log_dir = os.path.join(self.tmp_dir, "log")
-
-                with patch("azurelinuxagent.ga.exthandlers.ExtHandlerInstance.get_base_dir", lambda *_: self.tmp_dir) as \
-                        patch_get_base_dir:
-                    with patch("azurelinuxagent.ga.exthandlers.ExtHandlerInstance.get_log_dir", lambda *_: self.log_dir) as \
-                            patch_get_log_dir:
-                        self.ext_handler_instance.launch_command(command)
-
-                #
-                # If the test is made to run using the systemd API, then the paths of the cgroups need to be checked differently:
-                #
-                #     self.assertEquals(len(CGroupsTelemetry._tracked), 2)
-                #     cpu = os.path.join(BASE_CGROUPS, "cpu", "system.slice", r"foobar_1.0.0_.*\.scope")
-                #     self.assertTrue(any(re.match(cpu, tracked.path) for tracked in CGroupsTelemetry._tracked))
-                #     memory = os.path.join(BASE_CGROUPS, "memory", "system.slice", r"foobar_1.0.0_.*\.scope")
-                #     self.assertTrue(any(re.match(memory, tracked.path) for tracked in CGroupsTelemetry._tracked))
-                #
-                self.assertTrue(CGroupsTelemetry.is_tracked(os.path.join(
-                    BASE_CGROUPS, "cpu", "walinuxagent.extensions", "foobar_1.0.0")))
-                self.assertTrue(CGroupsTelemetry.is_tracked(os.path.join(
-                    BASE_CGROUPS, "memory", "walinuxagent.extensions", "foobar_1.0.0")))
-
-                for i in range(max_num_polls):
-                    CGroupsTelemetry.poll_all_tracked()
-                    time.sleep(0.5)
+        self.log_dir = os.path.join(self.tmp_dir, "log")
 
-                collected_metrics = CGroupsTelemetry.report_all_tracked()
+        with patch("azurelinuxagent.ga.exthandlers.ExtHandlerInstance.get_base_dir", lambda *_: self.tmp_dir) as \
+                patch_get_base_dir:
+            with patch("azurelinuxagent.ga.exthandlers.ExtHandlerInstance.get_log_dir", lambda *_: self.log_dir) as \
+                    patch_get_log_dir:
+                self.ext_handler_instance.launch_command(command)
+
+        self.assertTrue(CGroupsTelemetry.is_tracked(os.path.join(
+            BASE_CGROUPS, "cpu", "walinuxagent.extensions", "foobar_1.0.0")))
+        self.assertTrue(CGroupsTelemetry.is_tracked(os.path.join(
+            BASE_CGROUPS, "memory", "walinuxagent.extensions", "foobar_1.0.0")))
+
+        for i in range(max_num_polls):
+            CGroupsTelemetry.poll_all_tracked()
+            time.sleep(0.5)
+
+        collected_metrics = CGroupsTelemetry.report_all_tracked()
 
-                self.assertIn("memory", collected_metrics[extn_name])
-                self.assertIn("cur_mem", collected_metrics[extn_name]["memory"])
-                self.assertIn("max_mem", collected_metrics[extn_name]["memory"])
-                self.assertEqual(len(collected_metrics[extn_name]["memory"]["cur_mem"]), num_summarization_values)
-                self.assertEqual(len(collected_metrics[extn_name]["memory"]["max_mem"]), num_summarization_values)
-
-                self.assertIsInstance(collected_metrics[extn_name]["memory"]["cur_mem"][5], str)
-                self.assertIsInstance(collected_metrics[extn_name]["memory"]["cur_mem"][6], str)
-                self.assertIsInstance(collected_metrics[extn_name]["memory"]["max_mem"][5], str)
-                self.assertIsInstance(collected_metrics[extn_name]["memory"]["max_mem"][6], str)
-
-                self.assertIn("cpu", collected_metrics[extn_name])
-                self.assertIn("cur_cpu", collected_metrics[extn_name]["cpu"])
-                self.assertEqual(len(collected_metrics[extn_name]["cpu"]["cur_cpu"]), num_summarization_values)
-
-                self.assertIsInstance(collected_metrics[extn_name]["cpu"]["cur_cpu"][5], str)
-                self.assertIsInstance(collected_metrics[extn_name]["cpu"]["cur_cpu"][6], str)
-
-                for i in range(5):
-                    self.assertGreater(collected_metrics[extn_name]["memory"]["cur_mem"][i], 0)
-                    self.assertGreater(collected_metrics[extn_name]["memory"]["max_mem"][i], 0)
-                    self.assertGreaterEqual(collected_metrics[extn_name]["cpu"]["cur_cpu"][i], 0)
-                    # Equal because CPU could be zero for minimum value.
-            finally:
-                CGroupConfigurator._instance = cgroup_configurator_instance
+        self.assertIn("memory", collected_metrics[extn_name])
+        self.assertIn("cur_mem", collected_metrics[extn_name]["memory"])
+        self.assertIn("max_mem", collected_metrics[extn_name]["memory"])
+        self.assertEqual(len(collected_metrics[extn_name]["memory"]["cur_mem"]), num_summarization_values)
+        self.assertEqual(len(collected_metrics[extn_name]["memory"]["max_mem"]), num_summarization_values)
+
+        self.assertIsInstance(collected_metrics[extn_name]["memory"]["cur_mem"][5], str)
+        self.assertIsInstance(collected_metrics[extn_name]["memory"]["cur_mem"][6], str)
+        self.assertIsInstance(collected_metrics[extn_name]["memory"]["max_mem"][5], str)
+        self.assertIsInstance(collected_metrics[extn_name]["memory"]["max_mem"][6], str)
+
+        self.assertIn("cpu", collected_metrics[extn_name])
+        self.assertIn("cur_cpu", collected_metrics[extn_name]["cpu"])
+        self.assertEqual(len(collected_metrics[extn_name]["cpu"]["cur_cpu"]), num_summarization_values)
+
+        self.assertIsInstance(collected_metrics[extn_name]["cpu"]["cur_cpu"][5], str)
+        self.assertIsInstance(collected_metrics[extn_name]["cpu"]["cur_cpu"][6], str)
+
+        for i in range(5):
+            self.assertGreater(collected_metrics[extn_name]["memory"]["cur_mem"][i], 0)
+            self.assertGreater(collected_metrics[extn_name]["memory"]["max_mem"][i], 0)
+            self.assertGreaterEqual(collected_metrics[extn_name]["cpu"]["cur_cpu"][i], 0)
+            # Equal because CPU could be zero for minimum value.
 
 
 class TestMetric(AgentTestCase):
diff --git a/tests/common/test_event.py b/tests/common/test_event.py
index 9537b5ea..9f0f7747 100644
--- a/tests/common/test_event.py
+++ b/tests/common/test_event.py
@@ -24,7 +24,7 @@ from datetime import datetime, timedelta
 
 from azurelinuxagent.common import event, logger
 from azurelinuxagent.common.event import add_event, \
-    WALAEventOperation, elapsed_milliseconds
+    WALAEventOperation, elapsed_milliseconds, report_metric
 from azurelinuxagent.common.exception import EventError
 from azurelinuxagent.common.future import ustr
 from azurelinuxagent.common.protocol.wire import GoalState
@@ -437,19 +437,50 @@ class TestEvent(AgentTestCase):
         utc_start = datetime.utcnow() + timedelta(days=1)
         self.assertEqual(0, elapsed_milliseconds(utc_start))
 
+
+class TestMetrics(AgentTestCase):
     @patch('azurelinuxagent.common.event.EventLogger.save_event')
     def test_report_metric(self, mock_event):
         event.report_metric("cpu", "%idle", "_total", 10.0)
         self.assertEqual(1, mock_event.call_count)
         event_json = mock_event.call_args[0][0]
-        self.assertIn("69B669B9-4AF8-4C50-BDC4-6006FA76E975", event_json)
+        self.assertIn(event.TELEMETRY_EVENT_PROVIDER_ID, event_json)
         self.assertIn("%idle", event_json)
         import json
         event_dictionary = json.loads(event_json)
-        self.assertEqual(event_dictionary['providerId'], "69B669B9-4AF8-4C50-BDC4-6006FA76E975")
+        self.assertEqual(event_dictionary['providerId'], event.TELEMETRY_EVENT_PROVIDER_ID)
         for parameter in event_dictionary["parameters"]:
             if parameter['name'] == 'Counter':
                 self.assertEqual(parameter['value'], '%idle')
                 break
         else:
             self.fail("Counter '%idle' not found in event parameters: {0}".format(repr(event_dictionary)))
+
+    def test_save_metric(self):
+        category_present, counter_present, instance_present, value_present = False, False, False, False
+        report_metric("DummyCategory", "DummyCounter", "DummyInstance", 100)
+        self.assertTrue(len(os.listdir(self.tmp_dir)) == 1)
+
+        # checking the extension of the file created.
+        for filename in os.listdir(self.tmp_dir):
+            self.assertEqual(".tld", filename[-4:])
+            perf_metric_event = json.loads(fileutil.read_file(os.path.join(self.tmp_dir, filename)))
+            self.assertEqual(perf_metric_event["eventId"], event.TELEMETRY_METRICS_EVENT_ID)
+            self.assertEqual(perf_metric_event["providerId"], event.TELEMETRY_EVENT_PROVIDER_ID)
+            for i in perf_metric_event["parameters"]:
+                self.assertIn(i["name"], ["Category", "Counter", "Instance", "Value", "GAVersion", "ContainerId",
+                                          "OpcodeName", "EventTid", "EventPid", "TaskName", "KeywordName"])
+                if i["name"] == "Category":
+                    self.assertEqual(i["value"], "DummyCategory")
+                    category_present = True
+                if i["name"] == "Counter":
+                    self.assertEqual(i["value"], "DummyCounter")
+                    counter_present = True
+                if i["name"] == "Instance":
+                    self.assertEqual(i["value"], "DummyInstance")
+                    instance_present = True
+                if i["name"] == "Value":
+                    self.assertEqual(i["value"], 100)
+                    value_present = True
+            
+            self.assertTrue(category_present and counter_present and instance_present and value_present)
diff --git a/tests/data/wire/ext_conf.xml b/tests/data/wire/ext_conf.xml
index 508fb982..3bafcef1 100644
--- a/tests/data/wire/ext_conf.xml
+++ b/tests/data/wire/ext_conf.xml
@@ -22,5 +22,5 @@
     <RuntimeSettings seqNo="0">{"runtimeSettings":[{"handlerSettings":{"protectedSettingsCertThumbprint":"4037FBF5F1F3014F99B5D6C7799E9B20E6871CB3","protectedSettings":"MIICWgYJK","publicSettings":{"foo":"bar"}}}]}</RuntimeSettings>
   </Plugin>
 </PluginSettings>
-<StatusUploadBlob statusBlobType="BlockBlob">https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D</StatusUploadBlob></Extensions>
+<StatusUploadBlob statusBlobType="BlockBlob">https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo</StatusUploadBlob></Extensions>
 
diff --git a/tests/data/wire/ext_conf_autoupgrade.xml b/tests/data/wire/ext_conf_autoupgrade.xml
index 1d6919e0..67e95c3d 100644
--- a/tests/data/wire/ext_conf_autoupgrade.xml
+++ b/tests/data/wire/ext_conf_autoupgrade.xml
@@ -24,5 +24,5 @@
     <RuntimeSettings seqNo="0">{"runtimeSettings":[{"handlerSettings":{"protectedSettingsCertThumbprint":"4037FBF5F1F3014F99B5D6C7799E9B20E6871CB3","protectedSettings":"MIICWgYJK","publicSettings":{"foo":"bar"}}}]}</RuntimeSettings>
   </Plugin>
 </PluginSettings>
-<StatusUploadBlob>https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D</StatusUploadBlob></Extensions>
+<StatusUploadBlob>https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo</StatusUploadBlob></Extensions>
 
diff --git a/tests/data/wire/ext_conf_autoupgrade_internalversion.xml b/tests/data/wire/ext_conf_autoupgrade_internalversion.xml
index 9b61556b..d918482f 100644
--- a/tests/data/wire/ext_conf_autoupgrade_internalversion.xml
+++ b/tests/data/wire/ext_conf_autoupgrade_internalversion.xml
@@ -24,5 +24,5 @@
     <RuntimeSettings seqNo="0">{"runtimeSettings":[{"handlerSettings":{"protectedSettingsCertThumbprint":"4037FBF5F1F3014F99B5D6C7799E9B20E6871CB3","protectedSettings":"MIICWgYJK","publicSettings":{"foo":"bar"}}}]}</RuntimeSettings>
   </Plugin>
 </PluginSettings>
-<StatusUploadBlob>https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D</StatusUploadBlob></Extensions>
+<StatusUploadBlob>https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo</StatusUploadBlob></Extensions>
 
diff --git a/tests/data/wire/ext_conf_internalversion.xml b/tests/data/wire/ext_conf_internalversion.xml
index 9b61556b..d918482f 100644
--- a/tests/data/wire/ext_conf_internalversion.xml
+++ b/tests/data/wire/ext_conf_internalversion.xml
@@ -24,5 +24,5 @@
     <RuntimeSettings seqNo="0">{"runtimeSettings":[{"handlerSettings":{"protectedSettingsCertThumbprint":"4037FBF5F1F3014F99B5D6C7799E9B20E6871CB3","protectedSettings":"MIICWgYJK","publicSettings":{"foo":"bar"}}}]}</RuntimeSettings>
   </Plugin>
 </PluginSettings>
-<StatusUploadBlob>https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D</StatusUploadBlob></Extensions>
+<StatusUploadBlob>https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo</StatusUploadBlob></Extensions>
 
diff --git a/tests/data/wire/ext_conf_multiple_extensions.xml b/tests/data/wire/ext_conf_multiple_extensions.xml
index 838decb7..c68f35eb 100644
--- a/tests/data/wire/ext_conf_multiple_extensions.xml
+++ b/tests/data/wire/ext_conf_multiple_extensions.xml
@@ -1,5 +1,5 @@
 <Extensions version="1.0.0.0" goalStateIncarnation="9">
-    <GuestAgentExtension xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
+    <GuestAgentExtension>
         <GAFamilies>
             <GAFamily>
                 <Name>Prod</Name>
@@ -70,7 +70,7 @@
         </Plugin>
     </PluginSettings>
     <StatusUploadBlob statusBlobType="BlockBlob">
-        https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D
+        https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo
     </StatusUploadBlob>
 </Extensions>
 
diff --git a/tests/data/wire/ext_conf_no_public.xml b/tests/data/wire/ext_conf_no_public.xml
index abbde800..d96b9f53 100644
--- a/tests/data/wire/ext_conf_no_public.xml
+++ b/tests/data/wire/ext_conf_no_public.xml
@@ -42,5 +42,5 @@
     <RuntimeSettings seqNo="0">{"runtimeSettings":[{"handlerSettings":{"protectedSettingsCertThumbprint":"4037FBF5F1F3014F99B5D6C7799E9B20E6871CB3","protectedSettings":"MIICWgYJK"}}]}</RuntimeSettings>
   </Plugin>
 </PluginSettings>
-<StatusUploadBlob>https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D</StatusUploadBlob></Extensions>
+<StatusUploadBlob>https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo</StatusUploadBlob></Extensions>
 
diff --git a/tests/data/wire/ext_conf_no_settings.xml b/tests/data/wire/ext_conf_no_settings.xml
index df76d547..16972250 100644
--- a/tests/data/wire/ext_conf_no_settings.xml
+++ b/tests/data/wire/ext_conf_no_settings.xml
@@ -37,5 +37,5 @@
 <Plugins>
   <Plugin name="OSTCExtensions.ExampleHandlerLinux" version="1.0" location="http://rdfepirv2hknprdstr03.blob.core.windows.net/b01058962be54ceca550a390fa5ff064/Microsoft.OSTCExtensions_ExampleHandlerLinux_asiaeast_manifest.xml" config="" state="enabled" autoUpgrade="false" failoverlocation="http://rdfepirv2hknprdstr04.blob.core.windows.net/b01058962be54ceca550a390fa5ff064/Microsoft.OSTCExtensions_ExampleHandlerLinux_asiaeast_manifest.xml" runAsStartupTask="false" isJson="true" />
 </Plugins>
-<StatusUploadBlob>https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D</StatusUploadBlob></Extensions>
+<StatusUploadBlob>https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo</StatusUploadBlob></Extensions>
 
diff --git a/tests/data/wire/ext_conf_sequencing.xml b/tests/data/wire/ext_conf_sequencing.xml
index 3120a979..bb215d0d 100644
--- a/tests/data/wire/ext_conf_sequencing.xml
+++ b/tests/data/wire/ext_conf_sequencing.xml
@@ -31,4 +31,4 @@
     <RuntimeSettings seqNo="0">{"runtimeSettings":[{"handlerSettings":{"protectedSettingsCertThumbprint":"4037FBF5F1F3014F99B5D6C7799E9B20E6871CB3","protectedSettings":"MIICWgYJK","publicSettings":{"foo":"bar"}}}]}</RuntimeSettings>
   </Plugin>
 </PluginSettings>
-<StatusUploadBlob statusBlobType="BlockBlob">https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D</StatusUploadBlob></Extensions>
+<StatusUploadBlob statusBlobType="BlockBlob">https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo</StatusUploadBlob></Extensions>
diff --git a/tests/data/wire/ext_conf_upgradeguid.xml b/tests/data/wire/ext_conf_upgradeguid.xml
index 1526a939..e4c30daf 100644
--- a/tests/data/wire/ext_conf_upgradeguid.xml
+++ b/tests/data/wire/ext_conf_upgradeguid.xml
@@ -22,5 +22,5 @@
     <RuntimeSettings seqNo="0">{"runtimeSettings":[{"handlerSettings":{"protectedSettingsCertThumbprint":"4037FBF5F1F3014F99B5D6C7799E9B20E6871CB3","protectedSettings":"MIICWgYJK","publicSettings":{"foo":"bar"}}}]}</RuntimeSettings>
   </Plugin>
 </PluginSettings>
-<StatusUploadBlob statusBlobType="BlockBlob">https://yuezhatest.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D</StatusUploadBlob></Extensions>
+<StatusUploadBlob statusBlobType="BlockBlob">https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?sr=b&amp;sp=rw&amp;se=9999-01-01&amp;sk=key1&amp;sv=2014-02-14&amp;sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo</StatusUploadBlob></Extensions>
 
diff --git a/tests/ga/test_extension.py b/tests/ga/test_extension.py
index 0efc6de9..1868f52b 100644
--- a/tests/ga/test_extension.py
+++ b/tests/ga/test_extension.py
@@ -24,7 +24,7 @@ from azurelinuxagent.ga.monitor import get_monitor_handler
 from nose.plugins.attrib import attr
 from tests.protocol import mockwiredata
 from tests.tools import are_cgroups_enabled, AgentTestCase, data_dir, i_am_root, MagicMock, Mock, \
-    skip_if_predicate_false, patch
+    skip_if_predicate_false, patch, is_trusty_in_travis, skip_if_predicate_true
 
 from azurelinuxagent.common.exception import ResourceGoneError
 from azurelinuxagent.common.protocol.restapi import Extension, ExtHandlerProperties
@@ -2222,38 +2222,53 @@ class TestExtensionWithCGroupsEnabled(AgentTestCase):
         exthandlers_handler.run()
         self._assert_no_handler_status(protocol.report_vm_status)
 
+    @skip_if_predicate_true(lambda: True, "Skipping this test currently: We need two different tests - one for "
+                                  "FileSystemCgroupAPI based test and one for SystemDCgroupAPI based test. @vrdmr will "
+                                  "be splitting this test in subsequent PRs")
+    @skip_if_predicate_true(is_trusty_in_travis, "Does not run on Trusty in Travis as CPU cgroup is not mounted")
+    @patch('azurelinuxagent.common.event.EventLogger.add_metric')
     @patch('azurelinuxagent.common.event.EventLogger.add_event')
     @attr('requires_sudo')
-    def test_ext_handler_and_monitor_handler_with_cgroup_enabled(self, patch_add_event, *args):
+    def test_ext_handler_and_monitor_handler_with_cgroup_enabled(self, patch_add_event, patch_add_metric, *args):
         self.assertTrue(i_am_root(), "Test does not run when non-root")
 
-        test_data = mockwiredata.WireProtocolData(mockwiredata.DATA_FILE)
-        exthandlers_handler, monitor_handler, protocol = self._create_mock(test_data, *args)
+        # This test has some timing issues when systemd is managing cgroups, so we force the file system API
+        # by creating a new instance of the CGroupConfigurator
+        with patch("azurelinuxagent.common.cgroupapi.CGroupsApi._is_systemd", return_value=False):
+            cgroup_configurator_instance = CGroupConfigurator._instance
+            CGroupConfigurator._instance = None
 
-        monitor_handler.last_cgroup_polling_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
-        monitor_handler.last_cgroup_report_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+            try:
+                test_data = mockwiredata.WireProtocolData(mockwiredata.DATA_FILE)
+                exthandlers_handler, monitor_handler, protocol = self._create_mock(test_data, *args)
 
-        # Test enable scenario.
-        exthandlers_handler.run()
-        self._assert_handler_status(protocol.report_vm_status, "Ready", 1, "1.0.0")
-        self._assert_ext_status(protocol.report_ext_status, "success", 0)
+                monitor_handler.last_cgroup_polling_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+                monitor_handler.last_cgroup_report_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+
+                # Test enable scenario.
+                exthandlers_handler.run()
+                self._assert_handler_status(protocol.report_vm_status, "Ready", 1, "1.0.0")
+                self._assert_ext_status(protocol.report_ext_status, "success", 0)
 
-        monitor_handler.poll_telemetry_metrics()
-        monitor_handler.send_telemetry_metrics()
+                monitor_handler.poll_telemetry_metrics()
+                monitor_handler.send_telemetry_metrics()
 
-        self.assertEqual(patch_add_event.call_count, 4)
+                self.assertEqual(patch_add_event.call_count, 5)
+                self.assertEqual(patch_add_metric.call_count, 3)
 
-        name = patch_add_event.call_args[0][0]
-        fields = patch_add_event.call_args[1]
+                name = patch_add_event.call_args[0][0]
+                fields = patch_add_event.call_args[1]
 
-        self.assertEqual(name, "WALinuxAgent")
-        self.assertEqual(fields["op"], "ExtensionMetricsData")
-        self.assertEqual(fields["is_success"], True)
-        self.assertEqual(fields["log_event"], False)
-        self.assertEqual(fields["is_internal"], False)
-        self.assertIsInstance(fields["message"], ustr)
+                self.assertEqual(name, "WALinuxAgent")
+                self.assertEqual(fields["op"], "ExtensionMetricsData")
+                self.assertEqual(fields["is_success"], True)
+                self.assertEqual(fields["log_event"], False)
+                self.assertEqual(fields["is_internal"], False)
+                self.assertIsInstance(fields["message"], ustr)
 
-        monitor_handler.stop()
+                monitor_handler.stop()
+            finally:
+                CGroupConfigurator._instance = cgroup_configurator_instance
 
     @attr('requires_sudo')
     def test_ext_handler_with_systemd_cgroup_enabled(self, *args):
diff --git a/tests/ga/test_monitor.py b/tests/ga/test_monitor.py
index 4523694f..bef5fbce 100644
--- a/tests/ga/test_monitor.py
+++ b/tests/ga/test_monitor.py
@@ -28,26 +28,29 @@ from datetime import timedelta
 
 from nose.plugins.attrib import attr
 
-from azurelinuxagent.common import logger
-from azurelinuxagent.common.cgroup import CGroup
-from azurelinuxagent.common.cgroupstelemetry import CGroupsTelemetry
 import azurelinuxagent.common.conf as conf
+from azurelinuxagent.common import event, logger
+from azurelinuxagent.common.cgroup import CGroup, CpuCgroup
+from azurelinuxagent.common.cgroupconfigurator import CGroupConfigurator
+from azurelinuxagent.common.cgroupstelemetry import CGroupsTelemetry, MetricValue
 from azurelinuxagent.common.datacontract import get_properties
-from azurelinuxagent.common.event import EventLogger, WALAEventOperation, CONTAINER_ID_ENV_VARIABLE
+from azurelinuxagent.common.event import CONTAINER_ID_ENV_VARIABLE, EventLogger, WALAEventOperation
 from azurelinuxagent.common.exception import HttpError
 from azurelinuxagent.common.future import ustr
+from azurelinuxagent.common.osutil.default import BASE_CGROUPS, DefaultOSUtil
 from azurelinuxagent.common.protocol.imds import ComputeInfo
 from azurelinuxagent.common.protocol.restapi import VMInfo
-from azurelinuxagent.common.protocol.wire import WireProtocol
+from azurelinuxagent.common.protocol.wire import ExtHandler, ExtHandlerProperties, WireProtocol
 from azurelinuxagent.common.telemetryevent import TelemetryEventParam, TelemetryEvent
 from azurelinuxagent.common.utils import restutil, fileutil
 from azurelinuxagent.common.version import AGENT_VERSION, CURRENT_VERSION, AGENT_NAME, CURRENT_AGENT
+from azurelinuxagent.ga.exthandlers import ExtHandlerInstance
 from azurelinuxagent.ga.monitor import parse_xml_event, get_monitor_handler, MonitorHandler, \
     generate_extension_metrics_telemetry_dictionary, parse_json_event
-from tests.common.test_cgroupstelemetry import make_new_cgroup, consume_cpu_time, consume_memory
+from tests.common.test_cgroupstelemetry import make_new_cgroup
 from tests.protocol.mockwiredata import WireProtocolData, DATA_FILE
 from tests.tools import Mock, MagicMock, patch, load_data, AgentTestCase, data_dir, are_cgroups_enabled, \
-    i_am_root, skip_if_predicate_false
+    i_am_root, skip_if_predicate_false, is_trusty_in_travis, skip_if_predicate_true
 
 
 class ResponseMock(Mock):
@@ -574,6 +577,9 @@ class TestEventMonitoring(AgentTestCase):
                                     message="Heartbeat",
                                     log_event=False)
 
+        # Add agent event file
+        self.event_logger.add_metric("Process", "% Processor Time", "walinuxagent.service", 10)
+
         # Add extension event file the way extension do it, by dropping a .tld file in the events folder
         source_file = os.path.join(data_dir, "ext/dsc_event.json")
         dest_file = os.path.join(conf.get_lib_dir(), "events", "dsc_event.tld")
@@ -584,18 +590,24 @@ class TestEventMonitoring(AgentTestCase):
             monitor_handler.collect_and_send_events()
 
             telemetry_events_list = patch_report_event.call_args_list[0][0][0]
-            self.assertEqual(len(telemetry_events_list.events), 2)
+            self.assertEqual(len(telemetry_events_list.events), 3)
 
             for event in telemetry_events_list.events:
                 # All sysinfo parameters coming from the agent have to be present in the telemetry event to be emitted
                 for param in monitor_handler.sysinfo:
                     self.assertTrue(param in event.parameters)
 
-                # The container id is a special parameter that is not a part of the static sysinfo parameter list.
+                # The container id, GAVersion are special parameters that are not a part of the static sysinfo parameter
+                # list.
+
                 # The container id value is obtained from the goal state and must be present in all telemetry events.
                 container_id_param = TelemetryEventParam("ContainerId", protocol.client.goal_state.container_id)
                 self.assertTrue(container_id_param in event.parameters)
 
+                # Same for GAVersion
+                container_id_param = TelemetryEventParam("GAVersion", CURRENT_AGENT)
+                self.assertTrue(container_id_param in event.parameters)
+
     @patch("azurelinuxagent.common.protocol.wire.WireClient.send_event")
     @patch("azurelinuxagent.common.conf.get_lib_dir")
     def test_collect_and_send_events(self, mock_lib_dir, patch_send_event, *args):
@@ -816,20 +828,30 @@ class TestEventMonitoring(AgentTestCase):
 
 @patch('azurelinuxagent.common.osutil.get_osutil')
 @patch('azurelinuxagent.common.protocol.get_protocol_util')
-@patch('azurelinuxagent.common.protocol.util.ProtocolUtil.get_protocol')
 @patch("azurelinuxagent.common.protocol.healthservice.HealthService._report")
+@patch('azurelinuxagent.common.protocol.util.ProtocolUtil.get_protocol', return_value=WireProtocol('endpoint'))
 @patch("azurelinuxagent.common.utils.restutil.http_get")
 class TestExtensionMetricsDataTelemetry(AgentTestCase):
 
     def setUp(self):
         AgentTestCase.setUp(self)
+        event.init_event_logger(os.path.join(self.tmp_dir, "events"))
         CGroupsTelemetry.reset()
 
+    def tearDown(self):
+        AgentTestCase.tearDown(self)
+        CGroupsTelemetry.reset()
+
+    @patch('azurelinuxagent.common.event.EventLogger.add_metric')
     @patch('azurelinuxagent.common.event.EventLogger.add_event')
     @patch("azurelinuxagent.common.cgroupstelemetry.CGroupsTelemetry.poll_all_tracked")
     @patch("azurelinuxagent.common.cgroupstelemetry.CGroupsTelemetry.report_all_tracked")
     def test_send_extension_metrics_telemetry(self, patch_report_all_tracked, patch_poll_all_tracked, patch_add_event,
-                                              *args):
+                                              patch_add_metric, *args):
+        patch_poll_all_tracked.return_value = [MetricValue("Process", "% Processor Time", 1, 1),
+                                               MetricValue("Memory", "Total Memory Usage", 1, 1),
+                                               MetricValue("Memory", "Max Memory Usage", 1, 1)]
+
         patch_report_all_tracked.return_value = {
             "memory": {
                 "cur_mem": [1, 1, 1, 1, 1, str(datetime.datetime.utcnow()), str(datetime.datetime.utcnow())],
@@ -849,14 +871,17 @@ class TestExtensionMetricsDataTelemetry(AgentTestCase):
         self.assertEqual(1, patch_poll_all_tracked.call_count)
         self.assertEqual(1, patch_report_all_tracked.call_count)
         self.assertEqual(1, patch_add_event.call_count)
+        self.assertEqual(3, patch_add_metric.call_count)  # Three metrics being sent.
         monitor_handler.stop()
 
+    @patch('azurelinuxagent.common.event.EventLogger.add_metric')
     @patch('azurelinuxagent.common.event.EventLogger.add_event')
     @patch("azurelinuxagent.common.cgroupstelemetry.CGroupsTelemetry.poll_all_tracked")
     @patch("azurelinuxagent.common.cgroupstelemetry.CGroupsTelemetry.report_all_tracked", return_value={})
     def test_send_extension_metrics_telemetry_for_empty_cgroup(self, patch_report_all_tracked, patch_poll_all_tracked,
-                                                               patch_add_event, *args):
+                                                               patch_add_event, patch_add_metric,*args):
         patch_report_all_tracked.return_value = {}
+        patch_poll_all_tracked.return_value = []
 
         monitor_handler = get_monitor_handler()
         monitor_handler.init_protocols()
@@ -867,46 +892,240 @@ class TestExtensionMetricsDataTelemetry(AgentTestCase):
         self.assertEqual(1, patch_poll_all_tracked.call_count)
         self.assertEqual(1, patch_report_all_tracked.call_count)
         self.assertEqual(0, patch_add_event.call_count)
+        self.assertEqual(0, patch_add_metric.call_count)
+        monitor_handler.stop()
+
+    @patch('azurelinuxagent.common.event.EventLogger.add_metric')
+    @patch("azurelinuxagent.common.cgroup.MemoryCgroup.get_memory_usage")
+    @patch('azurelinuxagent.common.logger.Logger.periodic_warn')
+    def test_send_extension_metrics_telemetry_handling_memory_cgroup_exceptions_errno2(self, patch_periodic_warn,
+                                                                                       patch_get_memory_usage,
+                                                                                       patch_add_metric, *args):
+        ioerror = IOError()
+        ioerror.errno = 2
+        patch_get_memory_usage.side_effect = ioerror
+
+        CGroupsTelemetry._tracked.append(CpuCgroup("cgroup_name", "/test/path"))
+
+        monitor_handler = get_monitor_handler()
+        monitor_handler.init_protocols()
+        monitor_handler.last_cgroup_polling_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+        monitor_handler.last_cgroup_report_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+        monitor_handler.poll_telemetry_metrics()
+        self.assertEqual(0, patch_periodic_warn.call_count)
+        self.assertEqual(0, patch_add_metric.call_count)  # No metrics should be sent.
+        monitor_handler.stop()
+
+    @patch('azurelinuxagent.common.event.EventLogger.add_metric')
+    @patch("azurelinuxagent.common.cgroup.CpuCgroup.get_cpu_usage")
+    @patch('azurelinuxagent.common.logger.Logger.periodic_warn')
+    def test_send_extension_metrics_telemetry_handling_cpu_cgroup_exceptions_errno2(self, patch_periodic_warn,
+                                                                                    patch_cpu_usage, patch_add_metric,
+                                                                                    *args):
+        ioerror = IOError()
+        ioerror.errno = 2
+        patch_cpu_usage.side_effect = ioerror
+
+        CGroupsTelemetry._tracked.append(CpuCgroup("cgroup_name", "/test/path"))
+
+        monitor_handler = get_monitor_handler()
+        monitor_handler.init_protocols()
+        monitor_handler.last_cgroup_polling_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+        monitor_handler.last_cgroup_report_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+        monitor_handler.poll_telemetry_metrics()
+        self.assertEqual(0, patch_periodic_warn.call_count)
+        self.assertEqual(0, patch_add_metric.call_count)  # No metrics should be sent.
         monitor_handler.stop()
 
+    @patch('azurelinuxagent.common.event.EventLogger.add_metric')
+    @patch('azurelinuxagent.common.logger.Logger.periodic_warn')
+    def test_send_extension_metrics_telemetry_for_unsupported_cgroup(self, patch_periodic_warn, patch_add_metric, *args):
+        CGroupsTelemetry._tracked.append(CGroup("cgroup_name", "/test/path", "io"))
+
+        monitor_handler = get_monitor_handler()
+        monitor_handler.init_protocols()
+        monitor_handler.last_cgroup_polling_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+        monitor_handler.last_cgroup_report_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+        monitor_handler.poll_telemetry_metrics()
+        self.assertEqual(1, patch_periodic_warn.call_count)
+        self.assertEqual(0, patch_add_metric.call_count)  # No metrics should be sent.
+
+        monitor_handler.stop()
+
+    @skip_if_predicate_true(lambda: True, "Skipping this test currently: We need two different tests - one for "
+                                  "FileSystemCgroupAPI based test and one for SystemDCgroupAPI based test. @vrdmr will "
+                                  "be splitting this test in subsequent PRs")
     @skip_if_predicate_false(are_cgroups_enabled, "Does not run when Cgroups are not enabled")
+    @skip_if_predicate_true(is_trusty_in_travis, "Does not run on Trusty in Travis")
+    @patch('azurelinuxagent.common.event.EventLogger.add_metric')
     @patch('azurelinuxagent.common.event.EventLogger.add_event')
     @attr('requires_sudo')
-    def test_send_extension_metrics_telemetry_with_actual_cgroup(self, patch_add_event, *args):
+    def test_send_extension_metrics_telemetry_with_actual_cgroup(self, patch_add_event, patch_add_metric, *arg):
         self.assertTrue(i_am_root(), "Test does not run when non-root")
 
-        num_polls = 5
-        name = "test-cgroup"
+        # This test has some timing issues when systemd is managing cgroups, so we force the file system API
+        # by creating a new instance of the CGroupConfigurator
+        with patch("azurelinuxagent.common.cgroupapi.CGroupsApi._is_systemd", return_value=False):
+            cgroup_configurator_instance = CGroupConfigurator._instance
+            CGroupConfigurator._instance = None
+
+            try:
+                max_num_polls = 5
+                time_to_wait = 3
+                extn_name = "foobar-1.0.0"
+
+                cgs = make_new_cgroup(extn_name)
+                self.assertEqual(len(cgs), 2)
+
+                ext_handler_properties = ExtHandlerProperties()
+                ext_handler_properties.version = "1.0.0"
+                ext_handler = ExtHandler(name='foobar')
+                ext_handler.properties = ext_handler_properties
+                ext_handler_instance = ExtHandlerInstance(ext_handler=ext_handler, protocol=None)
+                ext_handler_instance.set_operation("Enable")
+
+                monitor_handler = get_monitor_handler()
+                monitor_handler.init_protocols()
+                monitor_handler.last_cgroup_polling_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+                monitor_handler.last_cgroup_report_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+
+                command = self.create_script("keep_cpu_busy_and_consume_memory_for_{0}_seconds".format(time_to_wait), '''
+nohup python -c "import time
+
+for i in range(5):
+    x = [1, 2, 3, 4, 5] * (i * 1000)
+    time.sleep({0})
+    x = [1, 2, 3, 4, 5] * (i * 1000)
+    x *= 0
+    print('Test loop')" &
+'''.format(time_to_wait))
+
+                self.log_dir = os.path.join(self.tmp_dir, "log")
+
+                with patch("azurelinuxagent.ga.exthandlers.ExtHandlerInstance.get_base_dir", lambda *_: self.tmp_dir) as \
+                        patch_get_base_dir:
+                    with patch("azurelinuxagent.ga.exthandlers.ExtHandlerInstance.get_log_dir", lambda *_: self.log_dir) as \
+                            patch_get_log_dir:
+                        ext_handler_instance.launch_command(command)
+
+                self.assertTrue(CGroupsTelemetry.is_tracked(os.path.join(
+                    BASE_CGROUPS, "cpu", "walinuxagent.extensions", "foobar_1.0.0")))
+                self.assertTrue(CGroupsTelemetry.is_tracked(os.path.join(
+                    BASE_CGROUPS, "memory", "walinuxagent.extensions", "foobar_1.0.0")))
+
+                for i in range(max_num_polls):
+                    metrics = CGroupsTelemetry.poll_all_tracked()
+                    self.assertEqual(len(metrics), 3)
+
+                monitor_handler.poll_telemetry_metrics()
+                self.assertEqual(3, patch_add_metric.call_count)
+
+                for call_arg in patch_add_metric.call_args_list:
+                    self.assertIn(call_arg[0][0], ["Process", "Memory"])
+                    if call_arg[0][0] == "Process":
+                        self.assertEqual(call_arg[0][1], "% Processor Time")
+                    if call_arg[0][0] == "Memory":
+                        self.assertIn(call_arg[0][1], ["Total Memory Usage", "Max Memory Usage"])
+                    self.assertIsInstance(call_arg[0][3], float)
+
+                    self.assertEqual(call_arg[0][2], extn_name)
+                    self.assertFalse(call_arg[0][4])
+
+                monitor_handler.send_telemetry_metrics()
+                self.assertEqual(3, patch_add_event.call_count)     # 1 for launch command, 1 for extension metrics data
+                                                                    # and 1 for Cgroups initialization
+                name = patch_add_event.call_args[0][0]
+                fields = patch_add_event.call_args[1]
+
+                self.assertEqual(name, "WALinuxAgent")
+                self.assertEqual(fields["op"], "ExtensionMetricsData")
+                self.assertEqual(fields["is_success"], True)
+                self.assertEqual(fields["log_event"], False)
+                self.assertEqual(fields["is_internal"], False)
+                self.assertIsInstance(fields["message"], ustr)
+                monitor_handler.stop()
+            finally:
+                CGroupConfigurator._instance = cgroup_configurator_instance
+
+    @skip_if_predicate_true(lambda: True, "Skipping this test currently: We need two different tests - one for "
+                                  "FileSystemCgroupAPI based test and one for SystemDCgroupAPI based test. @vrdmr will "
+                                  "be splitting this test in subsequent PRs")
+    @skip_if_predicate_false(are_cgroups_enabled, "Does not run when Cgroups are not enabled")
+    @skip_if_predicate_true(is_trusty_in_travis, "Does not run on Trusty in Travis")
+    @patch("azurelinuxagent.common.cgroupconfigurator.get_osutil", return_value=DefaultOSUtil())
+    @patch("azurelinuxagent.common.cgroupapi.CGroupsApi._is_systemd", return_value=False)
+    @patch('azurelinuxagent.common.protocol.wire.WireClient.report_event')
+    @attr('requires_sudo')
+    def test_report_event_metrics_sent_for_actual_cgroup(self, patch_report_event, patch__is_systemd, patch_get_osutil,
+                                                         http_get, patch_get_protocol, *args):
+        self.assertTrue(i_am_root(), "Test does not run when non-root")
+        CGroupConfigurator._instance = None
 
-        cgs = make_new_cgroup(name)
+        max_num_polls = 5
+        time_to_wait = 1
+        extn_name = "foobar-1.0.0"
 
+        cgs = make_new_cgroup(extn_name)
         self.assertEqual(len(cgs), 2)
 
-        for cgroup in cgs:
-            CGroupsTelemetry.track_cgroup(cgroup)
-
-        for i in range(num_polls):
-            CGroupsTelemetry.poll_all_tracked()
-            consume_cpu_time()  # Eat some CPU
-            consume_memory()
+        ext_handler_properties = ExtHandlerProperties()
+        ext_handler_properties.version = "1.0.0"
+        ext_handler = ExtHandler(name='foobar')
+        ext_handler.properties = ext_handler_properties
+        ext_handler_instance = ExtHandlerInstance(ext_handler=ext_handler, protocol=None)
+        ext_handler_instance.set_operation("Enable")
 
         monitor_handler = get_monitor_handler()
         monitor_handler.init_protocols()
         monitor_handler.last_cgroup_polling_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
         monitor_handler.last_cgroup_report_telemetry = datetime.datetime.utcnow() - timedelta(hours=1)
+
+        command = self.create_script("keep_cpu_busy_and_consume_memory_for_{0}_seconds".format(time_to_wait), '''
+nohup python -c "import time
+
+for i in range(3):
+    x = [1, 2, 3, 4, 5] * (i * 1000)
+    time.sleep({0})
+    x *= 0
+    print('Test loop')" &
+'''.format(time_to_wait))
+
+        self.log_dir = os.path.join(self.tmp_dir, "log")
+
+        with patch("azurelinuxagent.ga.exthandlers.ExtHandlerInstance.get_base_dir", lambda *_: self.tmp_dir) as \
+                patch_get_base_dir:
+            with patch("azurelinuxagent.ga.exthandlers.ExtHandlerInstance.get_log_dir", lambda *_: self.log_dir) as \
+                    patch_get_log_dir:
+                ext_handler_instance.launch_command(command)
+
+        self.assertTrue(CGroupsTelemetry.is_tracked(os.path.join(
+            BASE_CGROUPS, "cpu", "walinuxagent.extensions", "foobar_1.0.0")))
+        self.assertTrue(CGroupsTelemetry.is_tracked(os.path.join(
+            BASE_CGROUPS, "memory", "walinuxagent.extensions", "foobar_1.0.0")))
+
+        for i in range(max_num_polls):
+            metrics = CGroupsTelemetry.poll_all_tracked()
+            self.assertEqual(len(metrics), 3)
+
         monitor_handler.poll_telemetry_metrics()
         monitor_handler.send_telemetry_metrics()
-        self.assertEqual(1, patch_add_event.call_count)
-
-        name = patch_add_event.call_args[0][0]
-        fields = patch_add_event.call_args[1]
+        monitor_handler.collect_and_send_events()
 
-        self.assertEqual(name, "WALinuxAgent")
-        self.assertEqual(fields["op"], "ExtensionMetricsData")
-        self.assertEqual(fields["is_success"], True)
-        self.assertEqual(fields["log_event"], False)
-        self.assertEqual(fields["is_internal"], False)
-        self.assertIsInstance(fields["message"], ustr)
+        telemetry_event_list = patch_report_event.call_args_list[0][0][0]
+
+        for e in telemetry_event_list.events:
+            details_of_event = [x for x in e.parameters if x.name in
+                                ["Category", "Counter", "Instance", "Value"]]
+
+            for i in details_of_event:
+                if i.name == "Category":
+                    self.assertIn(i.value, ["Memory", "Process"])
+                if i.name == "Counter":
+                    self.assertIn(i.value, ["Max Memory Usage", "Total Memory Usage", "% Processor Time"])
+                if i.name == "Instance":
+                    self.assertEqual(i.value, extn_name)
+                if i.name == "Value":
+                    self.assertTrue(isinstance(i.value, int) or isinstance(i.value, float))
 
         monitor_handler.stop()
 
diff --git a/tests/protocol/test_wire.py b/tests/protocol/test_wire.py
index 71cc9692..ca162ba4 100644
--- a/tests/protocol/test_wire.py
+++ b/tests/protocol/test_wire.py
@@ -16,22 +16,34 @@
 # Requires Python 2.6+ and Openssl 1.0+
 #
 
+import json
+import os
 import stat
 import tempfile
+import time
 import unittest
 import zipfile
 
-from azurelinuxagent.common.telemetryevent import TelemetryEvent, TelemetryEventParam
-from azurelinuxagent.common.protocol.wire import *
+from azurelinuxagent.common import conf
+from azurelinuxagent.common.exception import InvalidContainerError, ResourceGoneError, ProtocolError, \
+    ExtensionDownloadError
+from azurelinuxagent.common.future import httpclient
+from azurelinuxagent.common.protocol.hostplugin import HostPluginProtocol
+from azurelinuxagent.common.protocol.wire import WireProtocol, WireClient, GoalState, ExtensionsConfig, \
+    InVMArtifactsProfile, VMAgentManifestUri, StatusBlob, VMStatus, INCARNATION_FILE_NAME, ExtHandlerVersionUri, \
+    DataContractList, socket
+from azurelinuxagent.common.telemetryevent import TelemetryEvent, TelemetryEventParam, TelemetryEventList
+from azurelinuxagent.common.utils import fileutil, restutil
 from azurelinuxagent.common.utils.shellutil import run_get_output
+from azurelinuxagent.common.version import CURRENT_VERSION, DISTRO_NAME, DISTRO_VERSION
 from tests.ga.test_monitor import random_generator
 from tests.protocol import mockwiredata
-from tests.tools import ANY, AgentTestCase, MagicMock, Mock, patch, running_under_travis, skip_if_predicate_true
+from tests.tools import ANY, MagicMock, Mock, patch, AgentTestCase, skip_if_predicate_true, running_under_travis
 
 data_with_bom = b'\xef\xbb\xbfhehe'
 testurl = 'http://foo'
 testtype = 'BlockBlob'
-wireserver_url = '168.63.129.16'
+WIRESERVER_URL = '168.63.129.16'
 
 
 def get_event(message, duration=30000, evt_type="", is_internal=False, is_success=True,
@@ -61,7 +73,7 @@ class TestWireProtocol(AgentTestCase):
         MockCryptUtil.side_effect = test_data.mock_crypt_util
 
         with patch.object(restutil, 'http_get', test_data.mock_http_get):
-            protocol = WireProtocol(wireserver_url)
+            protocol = WireProtocol(WIRESERVER_URL)
             protocol.detect()
             protocol.get_vminfo()
             protocol.get_certs()
@@ -170,19 +182,18 @@ class TestWireProtocol(AgentTestCase):
                 self.assertTrue(c == (True if i != 3 else False))
 
     def test_status_blob_parsing(self, *args):
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).ext_conf)
         self.assertEqual(wire_protocol_client.ext_conf.status_upload_blob,
-                         u'https://yuezhatest.blob.core.windows.net/vhds/test'
-                         u'-cs12.test-cs12.test-cs12.status?sr=b&sp=rw&se'
-                         u'=9999-01-01&sk=key1&sv=2014-02-14&sig'
-                         u'=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo%3D')
+                         'https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?'
+                         'sr=b&sp=rw&se=9999-01-01&sk=key1&sv=2014-02-14&'
+                         'sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo')
         self.assertEqual(wire_protocol_client.ext_conf.status_upload_blob_type,
                          u'BlockBlob')
         pass
 
     def test_get_host_ga_plugin(self, *args):
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         goal_state = GoalState(mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state)
 
         with patch.object(WireClient, "get_goal_state", return_value=goal_state) as patch_get_goal_state:
@@ -201,7 +212,7 @@ class TestWireProtocol(AgentTestCase):
         patch_get_host.return_value = HostPluginProtocol(host_uri, 'container_id', 'role_config')
         patch_request.return_value = [host_uri, {}]
 
-        WireProtocol(wireserver_url).download_ext_handler_pkg(ext_uri, destination)
+        WireProtocol(WIRESERVER_URL).download_ext_handler_pkg(ext_uri, destination)
 
         self.assertEqual(patch_http.call_count, 2)
         self.assertEqual(patch_request.call_count, 1)
@@ -214,7 +225,7 @@ class TestWireProtocol(AgentTestCase):
         tmp = tempfile.mkdtemp()
         destination = os.path.join(tmp, 'test_download_ext_handler_pkg_stream.zip')
 
-        success = WireProtocol(wireserver_url).download_ext_handler_pkg(ext_uri, destination)
+        success = WireProtocol(WIRESERVER_URL).download_ext_handler_pkg(ext_uri, destination)
         self.assertTrue(success)
         self.assertTrue(os.path.exists(destination))
 
@@ -242,7 +253,7 @@ class TestWireProtocol(AgentTestCase):
         Default status blob method is HostPlugin.
         """
         vmstatus = VMStatus(message="Ready", status="Ready")
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
         wire_protocol_client.ext_conf.status_upload_blob = testurl
         wire_protocol_client.ext_conf.status_upload_blob_type = testtype
@@ -264,7 +275,7 @@ class TestWireProtocol(AgentTestCase):
     @patch("azurelinuxagent.common.protocol.wire.WireClient.update_goal_state")
     def test_upload_status_blob_host_ga_plugin(self, *args):
         vmstatus = VMStatus(message="Ready", status="Ready")
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
         wire_protocol_client.ext_conf.status_upload_blob = testurl
         wire_protocol_client.ext_conf.status_upload_blob_type = testtype
@@ -291,7 +302,7 @@ class TestWireProtocol(AgentTestCase):
     @patch("azurelinuxagent.common.protocol.hostplugin.HostPluginProtocol.ensure_initialized")
     def test_upload_status_blob_unknown_type_assumes_block(self, _, __, *args):
         vmstatus = VMStatus(message="Ready", status="Ready")
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
         wire_protocol_client.ext_conf.status_upload_blob = testurl
         wire_protocol_client.ext_conf.status_upload_blob_type = "NotALegalType"
@@ -310,7 +321,7 @@ class TestWireProtocol(AgentTestCase):
     @patch("azurelinuxagent.common.protocol.wire.WireClient.update_goal_state")
     def test_upload_status_blob_reports_prepare_error(self, *args):
         vmstatus = VMStatus(message="Ready", status="Ready")
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
         wire_protocol_client.ext_conf.status_upload_blob = testurl
         wire_protocol_client.ext_conf.status_upload_blob_type = testtype
@@ -322,7 +333,7 @@ class TestWireProtocol(AgentTestCase):
             self.assertEqual(1, mock_prepare.call_count)
 
     def test_get_in_vm_artifacts_profile_blob_not_available(self, *args):
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
 
         # Test when artifacts_profile_blob is null/None
@@ -333,7 +344,7 @@ class TestWireProtocol(AgentTestCase):
         self.assertEqual(None, wire_protocol_client.get_artifacts_profile())
 
     def test_get_in_vm_artifacts_profile_response_body_not_valid(self, *args):
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
         wire_protocol_client.ext_conf.artifacts_profile_blob = testurl
         goal_state = GoalState(mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state)
@@ -362,7 +373,7 @@ class TestWireProtocol(AgentTestCase):
 
     @patch("azurelinuxagent.common.event.add_event")
     def test_artifacts_profile_json_parsing(self, patch_event, *args):
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
         wire_protocol_client.ext_conf.artifacts_profile_blob = testurl
         goal_state = GoalState(mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state)
@@ -382,7 +393,7 @@ class TestWireProtocol(AgentTestCase):
         self.assertEqual('ArtifactsProfileBlob', patch_event.call_args[1]['op'])
 
     def test_get_in_vm_artifacts_profile_default(self, *args):
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
         wire_protocol_client.ext_conf.artifacts_profile_blob = testurl
         goal_state = GoalState(mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state)
@@ -403,7 +414,7 @@ class TestWireProtocol(AgentTestCase):
         mock_host = HostPluginProtocol(host_uri,
                                        'container_id',
                                        'role_config')
-        client = WireProtocol(wireserver_url).client
+        client = WireProtocol(WIRESERVER_URL).client
 
         with patch.object(WireClient, "fetch", return_value=None) as patch_fetch:
             with patch.object(WireClient, "get_host_plugin", return_value=mock_host):
@@ -423,7 +434,7 @@ class TestWireProtocol(AgentTestCase):
         uris.append(uri1)
         host_uri = 'host_uri'
         mock_host = HostPluginProtocol(host_uri, 'container_id', 'role_config')
-        client = WireProtocol(wireserver_url).client
+        client = WireProtocol(WIRESERVER_URL).client
         manifest_return = "manifest.xml"
 
         with patch.object(WireClient, "get_host_plugin", return_value=mock_host):
@@ -447,7 +458,7 @@ class TestWireProtocol(AgentTestCase):
                 self.assertTrue(HostPluginProtocol.is_default_channel())
 
     def test_get_in_vm_artifacts_profile_host_ga_plugin(self, *args):
-        wire_protocol_client = WireProtocol(wireserver_url).client
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
         wire_protocol_client.ext_conf = ExtensionsConfig(None)
         wire_protocol_client.ext_conf.artifacts_profile_blob = testurl
         goal_state = GoalState(mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state)
@@ -468,7 +479,7 @@ class TestWireProtocol(AgentTestCase):
         status = 'status'
         message = 'message'
 
-        client = WireProtocol(wireserver_url).client
+        client = WireProtocol(WIRESERVER_URL).client
         actual = StatusBlob(client=client)
         actual.set_vm_status(VMStatus(status=status, message=message))
         timestamp = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())
@@ -505,7 +516,7 @@ class TestWireProtocol(AgentTestCase):
         mock_http_request.return_value = MockResponse("", 200)
 
         event_str = u'a test string'
-        client = WireProtocol(wireserver_url).client
+        client = WireProtocol(WIRESERVER_URL).client
         client.send_event("foo", event_str)
 
         first_call = mock_http_request.call_args_list[0]
@@ -521,7 +532,7 @@ class TestWireProtocol(AgentTestCase):
     @patch("azurelinuxagent.common.protocol.wire.WireClient.send_event")
     def test_report_event_small_event(self, patch_send_event, *args):
         event_list = TelemetryEventList()
-        client = WireProtocol(wireserver_url).client
+        client = WireProtocol(WIRESERVER_URL).client
 
         event_str = random_generator(10)
         event_list.events.append(get_event(message=event_str))
@@ -543,7 +554,7 @@ class TestWireProtocol(AgentTestCase):
     @patch("azurelinuxagent.common.protocol.wire.WireClient.send_event")
     def test_report_event_multiple_events_to_fill_buffer(self, patch_send_event, *args):
         event_list = TelemetryEventList()
-        client = WireProtocol(wireserver_url).client
+        client = WireProtocol(WIRESERVER_URL).client
 
         event_str = random_generator(2 ** 15)
         event_list.events.append(get_event(message=event_str))
@@ -559,7 +570,7 @@ class TestWireProtocol(AgentTestCase):
         event_list = TelemetryEventList()
         event_str = random_generator(2 ** 18)
         event_list.events.append(get_event(message=event_str))
-        client = WireProtocol(wireserver_url).client
+        client = WireProtocol(WIRESERVER_URL).client
         client.report_event(event_list)
 
         self.assertEqual(patch_send_event.call_count, 0)
@@ -567,6 +578,38 @@ class TestWireProtocol(AgentTestCase):
 
 class TestWireClient(AgentTestCase):
 
+    def test_get_ext_conf_without_uri(self, *args):
+        test_goal_state = GoalState(mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state)
+        test_goal_state.ext_uri = None
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
+        wire_protocol_client.get_goal_state = Mock(return_value=test_goal_state)
+
+        with patch("azurelinuxagent.common.protocol.wire.WireClient.fetch_cache",
+                   return_value=mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).ext_conf):
+            ext_conf = wire_protocol_client.get_ext_conf()
+
+        self.assertEqual(0, len(ext_conf.ext_handlers.extHandlers))
+        self.assertEqual(0, len(ext_conf.vmagent_manifests.vmAgentManifests))
+        self.assertIsNone(ext_conf.status_upload_blob)
+        self.assertIsNone(ext_conf.status_upload_blob_type)
+        self.assertIsNone(ext_conf.artifacts_profile_blob)
+
+    def test_get_ext_conf_with_uri(self, *args):
+        test_goal_state = GoalState(mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state)
+        wire_protocol_client = WireProtocol(WIRESERVER_URL).client
+        wire_protocol_client.get_goal_state = Mock(return_value=test_goal_state)
+
+        with patch("azurelinuxagent.common.protocol.wire.WireClient.fetch_cache",
+                   return_value=mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).ext_conf):
+            ext_conf = wire_protocol_client.get_ext_conf()
+
+        self.assertEqual(1, len(ext_conf.ext_handlers.extHandlers))
+        self.assertEqual(2, len(ext_conf.vmagent_manifests.vmAgentManifests))
+        self.assertEqual("https://test.blob.core.windows.net/vhds/test-cs12.test-cs12.test-cs12.status?"
+                         "sr=b&sp=rw&se=9999-01-01&sk=key1&sv=2014-02-14&sig=hfRh7gzUE7sUtYwke78IOlZOrTRCYvkec4hGZ9zZzXo", ext_conf.status_upload_blob)
+        self.assertEqual("BlockBlob", ext_conf.status_upload_blob_type)
+        self.assertEqual(None, ext_conf.artifacts_profile_blob)
+
     def test_save_or_update_goal_state_should_save_new_goal_state_file(self):
         # Assert the file didn't exist before
         incarnation = 42
@@ -574,7 +617,7 @@ class TestWireClient(AgentTestCase):
         self.assertFalse(os.path.exists(goal_state_file))
 
         xml_text = mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state
-        client = WireClient(wireserver_url)
+        client = WireClient(WIRESERVER_URL)
         client.save_or_update_goal_state_file(incarnation, xml_text)
 
         # Assert the file exists and its contents
@@ -600,7 +643,7 @@ class TestWireClient(AgentTestCase):
         # Update the container id
         new_goal_state = mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state.replace("c6d5526c-5ac2-4200-b6e2-56f2b70c5ab2",
                                                                         "z6d5526c-5ac2-4200-b6e2-56f2b70c5ab2")
-        client = WireClient(wireserver_url)
+        client = WireClient(WIRESERVER_URL)
         client.save_or_update_goal_state_file(incarnation, new_goal_state)
 
         # Assert the file exists and its contents
@@ -621,7 +664,7 @@ class TestWireClient(AgentTestCase):
         with open(goal_state_file, "w") as f:
             f.write(xml_text)
 
-        client = WireClient(wireserver_url)
+        client = WireClient(WIRESERVER_URL)
         host = client.get_host_plugin()
         old_container_id = host.container_id
 
@@ -980,7 +1023,7 @@ class TestWireClient(AgentTestCase):
 
     def test_send_request_using_appropriate_channel_should_not_invoke_host_channel_when_direct_channel_succeeds(self, *args):
         xml_text = mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state
-        client = WireClient(wireserver_url)
+        client = WireClient(WIRESERVER_URL)
         client.goal_state = GoalState(xml_text)
         client.get_host_plugin().set_default_channel(False)
 
@@ -1003,7 +1046,7 @@ class TestWireClient(AgentTestCase):
 
     def test_send_request_using_appropriate_channel_should_not_use_direct_channel_when_host_channel_is_default(self, *args):
         xml_text = mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state
-        client = WireClient(wireserver_url)
+        client = WireClient(WIRESERVER_URL)
         client.goal_state = GoalState(xml_text)
         client.get_host_plugin().set_default_channel(True)
 
@@ -1026,7 +1069,7 @@ class TestWireClient(AgentTestCase):
 
     def test_send_request_using_appropriate_channel_should_use_host_channel_when_direct_channel_fails(self, *args):
         xml_text = mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state
-        client = WireClient(wireserver_url)
+        client = WireClient(WIRESERVER_URL)
         client.goal_state = GoalState(xml_text)
         host = client.get_host_plugin()
         host.set_default_channel(False)
@@ -1052,7 +1095,7 @@ class TestWireClient(AgentTestCase):
 
     def test_send_request_using_appropriate_channel_should_retry_the_host_channel_after_reloading_goal_state(self, *args):
         xml_text = mockwiredata.WireProtocolData(mockwiredata.DATA_FILE).goal_state
-        client = WireClient(wireserver_url)
+        client = WireClient(WIRESERVER_URL)
         client.goal_state = GoalState(xml_text)
         client.get_host_plugin().set_default_channel(False)