Repository: hazelcast/hazelcast-kubernetes (java)

Issue:
Link Helm chart and operator from readme
the readme should link to Hazelcast Helm chart and Operator. 

Pull request description:
Update README with IBM Helm Chart and Kubernetes/OpenShift Operator
Update README

fix #143

Patch:
diff --git a/.gitignore b/.gitignore
index 134be63..04e6eef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,5 @@ build/
 *.iws
 .DS_Store
 atlassian-ide-plugin.xml
+.checkstyle
+.fbExcludeFilterFile
diff --git a/README.md b/README.md
index 7cfc459..efd9258 100644
--- a/README.md
+++ b/README.md
@@ -119,11 +119,12 @@ config.getNetworkConfig().getJoin().getKubernetesConfig().setEnabled(true)
       .setProperty("service-name", "MY-SERVICE-NAME");
 ```
 
-Here are the properties to configure the plugin, all of them are optional.
+There are several properties to configure the plugin, all of them are optional.
  * `namespace`: Kubernetes Namespace where Hazelcast is running; if not specified, the value is taken from the environment variables `KUBERNETES_NAMESPACE` or `OPENSHIFT_BUILD_NAMESPACE`
  * `service-name`: service name used to scan only PODs connected to the given service; if not specified, then all PODs in the namespace are checked
  * `service-label-name`, `service-label-value`: service label and value used to tag services that should form the Hazelcast cluster together
  * `resolve-not-ready-addresses`: if set to `true`, it checks also the addresses of PODs which are not ready; `false` by default
+ * `use-node-name-as-external-address`: if set to `true`, uses the node name to connect to a `NodePort` service instead of looking up the external IP using the API; `false` by default
  * `kubernetes-api-retries`: number of retries in case of issues while connecting to Kubernetes API; defaults to `3` 
  * `kubernetes-master`: URL of Kubernetes Master; `https://kubernetes.default.svc` by default
  * `api-token`: API Token to Kubernetes API; if not specified, the value is taken from the file `/var/run/secrets/kubernetes.io/serviceaccount/token`
@@ -296,16 +297,20 @@ To configure **Hazelcast Smart Client**, you need to perform the following steps
 
 **Note:** Hazelcast Client outside Kubernetes cluster works only in the **Kubernetes API** mode (it does not work in the **DNS Lookup** mode).
 
-## Scaling Hazelcast cluster in Kubernetes
+## Rolling Upgrade and Scaling
 
-Hazelcast cluster is easily scalable within Kubernetes. You can use the standard `kubectl scale` command to change the cluster size.
+Hazelcast cluster is easily scalable within Kubernetes. You can use the standard `kubectl scale` command to change the cluster size. The same applies the rolling upgrade procedure, you can depend on the standard Kubernetes behavior and just update the new version to your Deployment/StatefulSet configurations.
 
-Note however that, by default, Hazelcast does not shutdown gracefully. It means that if you suddenly scale down by more than your `backup-count` property (1 by default), you may lose the cluster data. To prevent that from happening, set the following properties:
+Note however that, by default, Hazelcast does not shutdown gracefully. It means that if you suddenly terminate more than your `backup-count` property (1 by default), you may lose the cluster data. To prevent that from happening, set the following properties:
 - `terminationGracePeriodSeconds`:  in your StatefulSet (or Deployment) configuration; the value should be high enough to cover the data migration process
 - `-Dhazelcast.shutdownhook.policy=GRACEFUL`: in the JVM parameters
 - `-Dhazelcast.graceful.shutdown.max.wait`: in the JVM parameters; the value should be high enough to cover the data migration process
 
-The graceful shutdown configuration is already included in [Hazelcast Helm Charts](#helm-chart).
+Additionally:
+- If you use Deployment (not StatefulSet), you need to set your strategy to [RollingUpdate](https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#updating-a-deployment) and ensure Pods are updated one by one.
+- If you upgrade by the minor version, e.g., `3.11.4 => 3.12` (Enterprise feature), you need to set the following JVM property `-Dhazelcast.cluster.version.auto.upgrade.enabled=true` to make sure the cluster version updates automatically.
+
+All these features are already included in [Hazelcast Helm Charts](#helm-chart).
 
 ## Plugin Usages
 
@@ -322,11 +327,21 @@ This plugin is included in the official Hazelcast Docker images:
 
 ### Helm Chart
 
-Hazelcast is available in the form of Helm Chart in 3 versions:
+Hazelcast is available in the form of Helm Chart in a few versions:
 
  * [stable/hazelcast](https://github.com/helm/charts/tree/master/stable/hazelcast) - Hazelcast IMDG in the official Helm Chart repository
  * [hazelcast/hazelcast](https://github.com/hazelcast/charts/tree/master/stable/hazelcast) - Hazelcast IMDG with Management Center
  * [hazelcast/hazelcast-enterprise](https://github.com/hazelcast/charts/tree/master/stable/hazelcast-enterprise) - Hazelcast Enterprise with Management Center
+ * [IBM/hazelcast-enterprise](https://github.com/IBM/charts/tree/master/community/hazelcast-enterprise) - Hazelcast Enterprise (with Management Center) dedicated for IBM ICP and IKS environments
+
+You can also check [Hazelcast Helm Charts at Helm Hub](https://hub.helm.sh/charts?q=hazelcast).
+
+### Kubernetes/OpenShift Operator
+
+Hazelcast is available as Kubernetes/OpenShift Operator:
+
+ * [hazelcast/hazelcast-operator](https://github.com/hazelcast/hazelcast-operator) - official Hazelcast Operator repository
+ * [Operator Hub](https://operatorhub.io/operator/hazelcast-operator) - official Hazelcast Operator published at Operator Hub
 
 ### Red Hat OpenShift
 
diff --git a/pom.xml b/pom.xml
index 6015110..c6420f0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
 
   <groupId>com.hazelcast</groupId>
   <artifactId>hazelcast-kubernetes</artifactId>
-  <version>1.5.1-SNAPSHOT</version>
+  <version>1.5.2-SNAPSHOT</version>
   <name>Kubernetes Discovery Plugin for Hazelcast</name>
   <description>Kubernetes Service Discovery for Hazelcast Discovery SPI</description>
   <url>http://github.com/hazelcast/hazelcast-kubernetes</url>
@@ -556,4 +556,4 @@
       </build>
     </profile>
   </profiles>
-</project>
+</project>
\ No newline at end of file
diff --git a/src/main/java/com/hazelcast/kubernetes/HazelcastKubernetesDiscoveryStrategy.java b/src/main/java/com/hazelcast/kubernetes/HazelcastKubernetesDiscoveryStrategy.java
index 77e70b2..c5a7f14 100644
--- a/src/main/java/com/hazelcast/kubernetes/HazelcastKubernetesDiscoveryStrategy.java
+++ b/src/main/java/com/hazelcast/kubernetes/HazelcastKubernetesDiscoveryStrategy.java
@@ -56,7 +56,7 @@ final class HazelcastKubernetesDiscoveryStrategy
 
     private static KubernetesClient buildKubernetesClient(KubernetesConfig config) {
         return new KubernetesClient(config.getNamespace(), config.getKubernetesMasterUrl(), config.getKubernetesApiToken(),
-                config.getKubernetesCaCertificate(), config.getKubernetesApiRetries());
+                config.getKubernetesCaCertificate(), config.getKubernetesApiRetries(), config.isUseNodeNameAsExternalAddress());
     }
 
     public void start() {
diff --git a/src/main/java/com/hazelcast/kubernetes/HazelcastKubernetesDiscoveryStrategyFactory.java b/src/main/java/com/hazelcast/kubernetes/HazelcastKubernetesDiscoveryStrategyFactory.java
index d8f9308..5f3a7d0 100644
--- a/src/main/java/com/hazelcast/kubernetes/HazelcastKubernetesDiscoveryStrategyFactory.java
+++ b/src/main/java/com/hazelcast/kubernetes/HazelcastKubernetesDiscoveryStrategyFactory.java
@@ -44,6 +44,7 @@ public class HazelcastKubernetesDiscoveryStrategyFactory
                 KubernetesProperties.SERVICE_LABEL_VALUE,
                 KubernetesProperties.NAMESPACE,
                 KubernetesProperties.RESOLVE_NOT_READY_ADDRESSES,
+                KubernetesProperties.USE_NODE_NAME_AS_EXTERNAL_ADDRESS,
                 KubernetesProperties.KUBERNETES_API_RETIRES,
                 KubernetesProperties.KUBERNETES_MASTER_URL,
                 KubernetesProperties.KUBERNETES_API_TOKEN,
diff --git a/src/main/java/com/hazelcast/kubernetes/KubernetesClient.java b/src/main/java/com/hazelcast/kubernetes/KubernetesClient.java
index 6a9ba01..bb0af5a 100644
--- a/src/main/java/com/hazelcast/kubernetes/KubernetesClient.java
+++ b/src/main/java/com/hazelcast/kubernetes/KubernetesClient.java
@@ -40,6 +40,7 @@ import static java.util.Collections.emptyList;
  *
  * @see <a href="https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.11/">Kubernetes API</a>
  */
+@SuppressWarnings("checkstyle:methodcount")
 class KubernetesClient {
     private static final ILogger LOGGER = Logger.getLogger(KubernetesClient.class);
 
@@ -53,15 +54,18 @@ class KubernetesClient {
     private final String apiToken;
     private final String caCertificate;
     private final int retries;
+    private boolean useNodeNameAsExternalAddress;
 
     private boolean isNoPublicIpAlreadyLogged;
 
-    KubernetesClient(String namespace, String kubernetesMaster, String apiToken, String caCertificate, int retries) {
+    KubernetesClient(String namespace, String kubernetesMaster, String apiToken, String caCertificate, int retries,
+            boolean useNodeNameAsExternalAddress) {
         this.namespace = namespace;
         this.kubernetesMaster = kubernetesMaster;
         this.apiToken = apiToken;
         this.caCertificate = caCertificate;
         this.retries = retries;
+        this.useNodeNameAsExternalAddress = useNodeNameAsExternalAddress;
     }
 
     /**
@@ -296,15 +300,14 @@ class KubernetesClient {
                     // Load Balancer public IP cannot be found, try using NodePort.
                     Integer nodePort = extractNodePort(serviceJson);
                     String node = nodes.get(privateAddress);
-                    String nodePublicIp;
+                    String nodePublicAddress;
                     if (cachedNodePublicIps.containsKey(node)) {
-                        nodePublicIp = cachedNodePublicIps.get(node);
+                        nodePublicAddress = cachedNodePublicIps.get(node);
                     } else {
-                        String nodeUrl = String.format("%s/api/v1/nodes/%s", kubernetesMaster, node);
-                        nodePublicIp = extractNodePublicIp(callGet(nodeUrl));
-                        cachedNodePublicIps.put(node, nodePublicIp);
+                        nodePublicAddress = externalAddressForNode(node);
+                        cachedNodePublicIps.put(node, nodePublicAddress);
                     }
-                    publicIps.put(privateAddress, nodePublicIp);
+                    publicIps.put(privateAddress, nodePublicAddress);
                     publicPorts.put(privateAddress, nodePort);
                 }
             }
@@ -422,6 +425,18 @@ class KubernetesClient {
         return ports.get(0).asObject().get("nodePort").asInt();
     }
 
+    private String externalAddressForNode(String node) {
+        String nodeExternalAddress;
+        if (useNodeNameAsExternalAddress) {
+            LOGGER.info("Using node name instead of public IP for node, must be available from client: " + node);
+            nodeExternalAddress = node;
+        } else {
+            String nodeUrl = String.format("%s/api/v1/nodes/%s", kubernetesMaster, node);
+            nodeExternalAddress = extractNodePublicIp(callGet(nodeUrl));
+        }
+        return nodeExternalAddress;
+    }
+
     private static String extractNodePublicIp(JsonObject nodeJson) {
         for (JsonValue address : toJsonArray(nodeJson.get("status").asObject().get("addresses"))) {
             if ("ExternalIP".equals(address.asObject().get("type").asString())) {
diff --git a/src/main/java/com/hazelcast/kubernetes/KubernetesConfig.java b/src/main/java/com/hazelcast/kubernetes/KubernetesConfig.java
index 874bfc3..313827e 100644
--- a/src/main/java/com/hazelcast/kubernetes/KubernetesConfig.java
+++ b/src/main/java/com/hazelcast/kubernetes/KubernetesConfig.java
@@ -41,6 +41,7 @@ import static com.hazelcast.kubernetes.KubernetesProperties.SERVICE_LABEL_NAME;
 import static com.hazelcast.kubernetes.KubernetesProperties.SERVICE_LABEL_VALUE;
 import static com.hazelcast.kubernetes.KubernetesProperties.SERVICE_NAME;
 import static com.hazelcast.kubernetes.KubernetesProperties.SERVICE_PORT;
+import static com.hazelcast.kubernetes.KubernetesProperties.USE_NODE_NAME_AS_EXTERNAL_ADDRESS;
 
 /**
  * Responsible for fetching, parsing, and validating Hazelcast Kubernetes Discovery Strategy input properties.
@@ -60,6 +61,7 @@ final class KubernetesConfig {
     private final String serviceLabelValue;
     private final String namespace;
     private final boolean resolveNotReadyAddresses;
+    private final boolean useNodeNameAsExternalAddress;
     private final int kubernetesApiRetries;
     private final String kubernetesMasterUrl;
     private final String kubernetesApiToken;
@@ -77,6 +79,8 @@ final class KubernetesConfig {
         this.serviceLabelValue = getOrDefault(properties, KUBERNETES_SYSTEM_PREFIX, SERVICE_LABEL_VALUE, "true");
         this.namespace = getOrDefault(properties, KUBERNETES_SYSTEM_PREFIX, NAMESPACE, getNamespaceOrDefault());
         this.resolveNotReadyAddresses = getOrDefault(properties, KUBERNETES_SYSTEM_PREFIX, RESOLVE_NOT_READY_ADDRESSES, false);
+        this.useNodeNameAsExternalAddress
+                = getOrDefault(properties, KUBERNETES_SYSTEM_PREFIX, USE_NODE_NAME_AS_EXTERNAL_ADDRESS, false);
         this.kubernetesApiRetries
                 = getOrDefault(properties, KUBERNETES_SYSTEM_PREFIX, KUBERNETES_API_RETIRES, DEFAULT_KUBERNETES_API_RETRIES);
         this.kubernetesMasterUrl = getOrDefault(properties, KUBERNETES_SYSTEM_PREFIX, KUBERNETES_MASTER_URL, DEFAULT_MASTER_URL);
@@ -255,6 +259,10 @@ final class KubernetesConfig {
         return resolveNotReadyAddresses;
     }
 
+    boolean isUseNodeNameAsExternalAddress() {
+        return useNodeNameAsExternalAddress;
+    }
+
     int getKubernetesApiRetries() {
         return kubernetesApiRetries;
     }
@@ -286,6 +294,7 @@ final class KubernetesConfig {
                 + "service-label-value: " + serviceLabelValue + ", "
                 + "namespace: " + namespace + ", "
                 + "resolve-not-ready-addresses: " + resolveNotReadyAddresses + ", "
+                + "use-node-name-as-external-address: " + useNodeNameAsExternalAddress + ", "
                 + "kubernetes-api-retries: " + kubernetesApiRetries + ", "
                 + "kubernetes-master: " + kubernetesMasterUrl + "}";
     }
diff --git a/src/main/java/com/hazelcast/kubernetes/KubernetesProperties.java b/src/main/java/com/hazelcast/kubernetes/KubernetesProperties.java
index bad8ca7..1db1347 100644
--- a/src/main/java/com/hazelcast/kubernetes/KubernetesProperties.java
+++ b/src/main/java/com/hazelcast/kubernetes/KubernetesProperties.java
@@ -91,6 +91,14 @@ public final class KubernetesProperties {
      */
     public static final PropertyDefinition RESOLVE_NOT_READY_ADDRESSES = property("resolve-not-ready-addresses", BOOLEAN);
 
+    /**
+     * <p>Configuration key: <tt>use-node-name-as-external-address</tt></p>
+     * Defines if the node name should be used as external address, instead of looking up the external IP using
+     * the <code>/nodes</code> resource. Default is false.
+     */
+    public static final PropertyDefinition USE_NODE_NAME_AS_EXTERNAL_ADDRESS = property("use-node-name-as-external-address",
+            BOOLEAN);
+
     /**
      * <p>Configuration key: <tt>kubernetes-api-retries</tt></p>
      * Defines the number of retries to Kubernetes API. Defaults to: 3.


Test patch:
diff --git a/src/test/java/com/hazelcast/kubernetes/KubernetesClientTest.java b/src/test/java/com/hazelcast/kubernetes/KubernetesClientTest.java
index e715cf0..778b333 100644
--- a/src/test/java/com/hazelcast/kubernetes/KubernetesClientTest.java
+++ b/src/test/java/com/hazelcast/kubernetes/KubernetesClientTest.java
@@ -56,8 +56,7 @@ public class KubernetesClientTest {
 
     @Before
     public void setUp() {
-        String kubernetesMasterUrl = String.format("http://%s:%d", KUBERNETES_MASTER_IP, wireMockRule.port());
-        kubernetesClient = new KubernetesClient(NAMESPACE, kubernetesMasterUrl, TOKEN, CA_CERTIFICATE, RETRIES);
+        kubernetesClient = newKubernetesClient(false);
         stubFor(get(urlMatching("/api/.*")).atPriority(5)
                                            .willReturn(aResponse().withStatus(401).withBody("\"reason\":\"Forbidden\"")));
     }
@@ -364,37 +363,11 @@ public class KubernetesClientTest {
         // given
         stub(String.format("/api/v1/namespaces/%s/pods", NAMESPACE), podsListResponse());
         stub(String.format("/api/v1/namespaces/%s/endpoints", NAMESPACE), endpointsListResponse());
-        //language=JSON
-        //language=JSON
-        String serviceResponse1 = "{\n"
-                + "  \"kind\": \"Service\",\n"
-                + "  \"spec\": {\n"
-                + "    \"ports\": [\n"
-                + "      {\n"
-                + "        \"port\": 32123,\n"
-                + "        \"targetPort\": 5701,\n"
-                + "        \"nodePort\": 31916\n"
-                + "      }\n"
-                + "    ]\n"
-                + "  }\n"
-                + "}\n";
-        stub(String.format("/api/v1/namespaces/%s/services/service-0", NAMESPACE), serviceResponse1);
 
-        //language=JSON
-        String serviceResponse2 = "{\n"
-                + "  \"kind\": \"Service\",\n"
-                + "  \"spec\": {\n"
-                + "    \"ports\": [\n"
-                + "      {\n"
-                + "        \"port\": 32124,\n"
-                + "        \"targetPort\": 5701,\n"
-                + "        \"nodePort\": 31917\n"
-                + "      }\n"
-                + "    ]\n"
-                + "  }\n"
-                + "}";
-        stub(String.format("/api/v1/namespaces/%s/services/service-1", NAMESPACE), serviceResponse2);
+        stub(String.format("/api/v1/namespaces/%s/services/service-0", NAMESPACE), nodePortService1Response());
+        stub(String.format("/api/v1/namespaces/%s/services/service-1", NAMESPACE), nodePortService2Response());
 
+        //language=JSON
         String nodeResponse1 = "{\n"
                 + "  \"kind\": \"Node\",\n"
                 + "  \"status\": {\n"
@@ -437,6 +410,30 @@ public class KubernetesClientTest {
         assertThat(formatPublic(result), containsInAnyOrder(ready("35.232.226.200", 31916), ready("35.232.226.201", 31917)));
     }
 
+    @Test
+    public void endpointsByNamespaceWithNodeName() {
+        // given
+        // create KubernetesClient with useNodeNameAsExternalAddress=true
+        kubernetesClient = newKubernetesClient(true);
+
+        stub(String.format("/api/v1/namespaces/%s/pods", NAMESPACE), podsListResponse());
+        stub(String.format("/api/v1/namespaces/%s/endpoints", NAMESPACE), endpointsListResponse());
+
+        stub(String.format("/api/v1/namespaces/%s/services/service-0", NAMESPACE), nodePortService1Response());
+        stub(String.format("/api/v1/namespaces/%s/services/service-1", NAMESPACE), nodePortService2Response());
+
+        String forbiddenBody = "\"reason\":\"Forbidden\"";
+        stub("/api/v1/nodes/node-name-1", 403, forbiddenBody);
+        stub("/api/v1/nodes/node-name-2", 403, forbiddenBody);
+
+        // when
+        List<Endpoint> result = kubernetesClient.endpoints();
+
+        // then
+        assertThat(format(result), containsInAnyOrder(ready("192.168.0.25", 5701), ready("172.17.0.5", 5702)));
+        assertThat(formatPublic(result), containsInAnyOrder(ready("node-name-1", 31916), ready("node-name-2", 31917)));
+    }
+
     private static String podsListResponse() {
         //language=JSON
         return "{\n"
@@ -561,13 +558,43 @@ public class KubernetesClientTest {
                 + "}";
     }
 
+    private static String nodePortService1Response() {
+        //language=JSON
+        return "{\n"
+        + "  \"kind\": \"Service\",\n"
+        + "  \"spec\": {\n"
+        + "    \"ports\": [\n"
+        + "      {\n"
+        + "        \"port\": 32123,\n"
+        + "        \"targetPort\": 5701,\n"
+        + "        \"nodePort\": 31916\n"
+        + "      }\n"
+        + "    ]\n"
+        + "  }\n"
+        + "}\n";
+    }
+
+    private static String nodePortService2Response() {
+        //language=JSON
+        return "{\n"
+        + "  \"kind\": \"Service\",\n"
+        + "  \"spec\": {\n"
+        + "    \"ports\": [\n"
+        + "      {\n"
+        + "        \"port\": 32124,\n"
+        + "        \"targetPort\": 5701,\n"
+        + "        \"nodePort\": 31917\n"
+        + "      }\n"
+        + "    ]\n"
+        + "  }\n"
+        + "}";
+    }
+
     @Test
     public void forbidden() {
         // given
         String forbiddenBody = "\"reason\":\"Forbidden\"";
-        stubFor(get(urlEqualTo(String.format("/api/v1/namespaces/%s/pods", NAMESPACE)))
-                .withHeader("Authorization", equalTo(String.format("Bearer %s", TOKEN)))
-                .willReturn(aResponse().withStatus(403).withBody(forbiddenBody)));
+        stub(String.format("/api/v1/namespaces/%s/pods", NAMESPACE), 403, forbiddenBody);
 
         // when
         List<Endpoint> result = kubernetesClient.endpoints();
@@ -580,9 +607,7 @@ public class KubernetesClientTest {
     public void wrongApiToken() {
         // given
         String unauthorizedBody = "\"reason\":\"Unauthorized\"";
-        stubFor(get(urlEqualTo(String.format("/api/v1/namespaces/%s/pods", NAMESPACE)))
-                .withHeader("Authorization", equalTo(String.format("Bearer %s", TOKEN)))
-                .willReturn(aResponse().withStatus(401).withBody(unauthorizedBody)));
+        stub(String.format("/api/v1/namespaces/%s/pods", NAMESPACE), 401, unauthorizedBody);
 
         // when
         List<Endpoint> result = kubernetesClient.endpoints();
@@ -595,14 +620,17 @@ public class KubernetesClientTest {
     public void unknownException() {
         // given
         String notRetriedErrorBody = "\"reason\":\"Forbidden\"";
-        stubFor(get(urlEqualTo(String.format("/api/v1/namespaces/%s/pods", NAMESPACE)))
-                .withHeader("Authorization", equalTo(String.format("Bearer %s", TOKEN)))
-                .willReturn(aResponse().withStatus(501).withBody(notRetriedErrorBody)));
+        stub(String.format("/api/v1/namespaces/%s/pods", NAMESPACE), 501, notRetriedErrorBody);
 
         // when
         kubernetesClient.endpoints();
     }
 
+    private KubernetesClient newKubernetesClient(boolean useNodeNameAsExternalAddress) {
+        String kubernetesMasterUrl = String.format("http://%s:%d", KUBERNETES_MASTER_IP, wireMockRule.port());
+        return new KubernetesClient(NAMESPACE, kubernetesMasterUrl, TOKEN, CA_CERTIFICATE, RETRIES, useNodeNameAsExternalAddress);
+    }
+
     private static List<String> format(List<Endpoint> addresses) {
         List<String> result = new ArrayList<String>();
         for (Endpoint address : addresses) {
@@ -626,9 +654,13 @@ public class KubernetesClientTest {
     }
 
     private static void stub(String url, String response) {
+        stub(url, 200, response);
+    }
+
+    private static void stub(String url, int status, String response) {
         stubFor(get(urlEqualTo(url))
                 .withHeader("Authorization", equalTo(String.format("Bearer %s", TOKEN)))
-                .willReturn(aResponse().withStatus(200).withBody(response)));
+                .willReturn(aResponse().withStatus(status).withBody(response)));
     }
 
     private static void stub(String url, Map<String, String> queryParams, String response) {
diff --git a/src/test/java/com/hazelcast/kubernetes/KubernetesConfigTest.java b/src/test/java/com/hazelcast/kubernetes/KubernetesConfigTest.java
index 2875aee..a7569fd 100644
--- a/src/test/java/com/hazelcast/kubernetes/KubernetesConfigTest.java
+++ b/src/test/java/com/hazelcast/kubernetes/KubernetesConfigTest.java
@@ -79,6 +79,7 @@ public class KubernetesConfigTest {
         assertEquals(DiscoveryMode.KUBERNETES_API, config.getMode());
         assertEquals("default", config.getNamespace());
         assertEquals(false, config.isResolveNotReadyAddresses());
+        assertEquals(false, config.isUseNodeNameAsExternalAddress());
         assertEquals(TEST_API_TOKEN, config.getKubernetesApiToken());
         assertEquals(TEST_CA_CERTIFICATE, config.getKubernetesCaCertificate());
     }
@@ -116,6 +117,19 @@ public class KubernetesConfigTest {
         assertEquals(serviceLabelValue, config.getServiceLabelValue());
     }
 
+    @Test
+    public void kubernetesApiNodeNameAsExternalAddress() {
+        // given
+        Map<String, Comparable> properties = createProperties();
+        properties.put(KubernetesProperties.USE_NODE_NAME_AS_EXTERNAL_ADDRESS.key(), true);
+
+        // when
+        KubernetesConfig config = new KubernetesConfig(properties);
+
+        // then
+        assertEquals(true, config.isUseNodeNameAsExternalAddress());
+    }
+
     @Test(expected = InvalidConfigurationException.class)
     public void invalidConfigurationBothModesConfigured() {
         // given