update in cluster config to use env vars

Signed-off-by: Travis Glenn Hansen <travisghansen@yahoo.com>

Author: travisghansen

README.md

@@ -22,6 +22,10 @@ stop the watch (break the loop) based off of event logic.
  * `GET /apis/batch/v1beta1/watch/cronjobs` (resource type cluster-wide)
  * https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.10/#watch
 
+Other notes:
+ - if using labelSelectors triggered events will fire with ADDED / DELETED types if the label is added/delete
+ (ie: ADDED/DELETED do not necessarily equate to literally being added/deleted from k8s)
+
 # Development
 Note on `resourceVersion` per the doc:
 > When specified with a watch call, shows changes that occur after that particular version of a resource. Defaults to

src/KubernetesClient/Config.php

@@ -180,7 +180,14 @@ public static function InClusterConfig()
         $config = new Config();
         $config->setToken(file_get_contents('/var/run/secrets/kubernetes.io/serviceaccount/token'));
         $config->setCertificateAuthorityPath('/var/run/secrets/kubernetes.io/serviceaccount/ca.crt');
-        $config->setServer('https://kubernetes.default.svc');
+
+        if (strlen(getenv('KUBERNETES_SERVICE_HOST')) > 0) {
+            $server = 'https://' . getenv('KUBERNETES_SERVICE_HOST') . ':' . getenv('KUBERNETES_SERVICE_PORT');
+        } else {
+            $server = 'https://kubernetes.default.svc';
+        }
+
+        $config->setServer($server);
 
         return $config;
     }