AmbariのMetrics monitor起動 due to AttributeError: 'module' object has no attribute 'boot_time'

以下のエラーでAmbariのMetrics monitor起動に失敗することがあります。

```
Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/AMBARI_METRICS/package/scripts/metrics_monitor.py", line 78, in <module>
    AmsMonitor().execute()
  File "/usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py", line 352, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/AMBARI_METRICS/package/scripts/metrics_monitor.py", line 43, in start
    action = 'start'
  File "/usr/lib/ambari-agent/lib/ambari_commons/os_family_impl.py", line 89, in thunk
    return fn(*args, **kwargs)
  File "/var/lib/ambari-agent/cache/stacks/HDP/3.0/services/AMBARI_METRICS/package/scripts/ams_service.py", line 109, in ams_service
    user=params.ams_user
  File "/usr/lib/ambari-agent/lib/resource_management/core/base.py", line 166, in __init__
    self.env.run()
  File "/usr/lib/ambari-agent/lib/resource_management/core/environment.py", line 160, in run
    self.run_action(resource, action)
  File "/usr/lib/ambari-agent/lib/resource_management/core/environment.py", line 124, in run_action
    provider_action()
  File "/usr/lib/ambari-agent/lib/resource_management/core/providers/system.py", line 263, in action_run
    returns=self.resource.returns)
  File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 72, in inner
    result = function(command, **kwargs)
  File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 102, in checked_call
    tries=tries, try_sleep=try_sleep, timeout_kill_strategy=timeout_kill_strategy, returns=returns)
  File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 150, in _call_wrapper
    result = _call(command, **kwargs_copy)
  File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 314, in _call
    raise ExecutionFailed(err_msg, code, out, err)
resource_management.core.exceptions.ExecutionFailed: Execution of '/usr/sbin/ambari-metrics-monitor --config /etc/ambari-metrics-monitor/conf start' returned 255. psutil build directory is not empty, continuing...
Verifying Python version compatibility...
Using python  /usr/bin/python2.7
Checking for previously running Metric Monitor...
/var/run/ambari-metrics-monitor/ambari-metrics-monitor.pid found with no process. Removing 5237...
Starting ambari-metrics-monitor
Verifying ambari-metrics-monitor process status with PID : 11790
Output of PID check : 
ERROR: ambari-metrics-monitor start failed. For more details, see /var/log/ambari-metrics-monitor/ambari-metrics-monitor.out:
====================
    server_process_main(stop_handler)
  File "/usr/lib/python2.6/site-packages/resource_monitoring/main.py", line 64, in server_process_main
    controller = Controller(main_config, stop_handler)
  File "/usr/lib/python2.6/site-packages/resource_monitoring/core/controller.py", line 46, in __init__
    hostinfo = HostInfo(config)
  File "/usr/lib/python2.6/site-packages/resource_monitoring/core/host_info.py", line 49, in __init__
    self.__host_static_info = self.get_host_static_info()
  File "/usr/lib/python2.6/site-packages/resource_monitoring/core/host_info.py", line 235, in get_host_static_info
    boot_time = psutil.boot_time()
AttributeError: 'module' object has no attribute 'boot_time'
====================
Monitor out at: /var/log/ambari-metrics-monitor/ambari-metrics-monitor.out
```
### 解決策
以下を実行する

```
cd /usr/lib/python2.6/site-packages/resource_monitoring/psutil
make install ambari-metrics-monitor restart
```