Merge pull request #109 from Cryptophobia/master

feat(controller): Add POD_IP environment variable if DEIS_EXPOSE_POD_IP

rootfs/api/models/app.py

@@ -1081,6 +1081,9 @@ def _gather_app_settings(self, release, app_settings, process_type, replicas):
         # set the image pull policy that is associated with the application container
         image_pull_policy = config.values.get('IMAGE_PULL_POLICY', settings.IMAGE_PULL_POLICY)
 
+        # set pod ip if this variable is set
+        set_pod_ip = config.values.get('DEIS_EXPOSE_POD_IP', settings.DEIS_EXPOSE_POD_IP)
+
         # create image pull secret if needed
         image_pull_secret_name = self.image_pull_secret(self.id, config.registry, release.image)
 
@@ -1113,7 +1116,8 @@ def _gather_app_settings(self, release, app_settings, process_type, replicas):
             'pod_termination_grace_period_seconds': pod_termination_grace_period_seconds,
             'pod_termination_grace_period_each': config.termination_grace_period,
             'image_pull_secret_name': image_pull_secret_name,
-            'image_pull_policy': image_pull_policy
+            'image_pull_policy': image_pull_policy,
+            'set_pod_ip': set_pod_ip
         }
 
     def set_application_config(self, release):

rootfs/api/settings/production.py

@@ -269,6 +269,10 @@
 SLUGRUNNER_IMAGE = os.environ.get('SLUGRUNNER_IMAGE_NAME', 'quay.io/deisci/slugrunner:canary')  # noqa
 IMAGE_PULL_POLICY = os.environ.get('IMAGE_PULL_POLICY', "IfNotPresent")  # noqa
 
+# Pod IP Exposure
+DEIS_EXPOSE_POD_IP = bool(os.environ.get('DEIS_EXPOSE_POD_IP', False))
+
+
 # True, true, yes, y and more evaluate to True
 # False, false, no, n and more evaluate to False
 # https://docs.python.org/3/distutils/apiref.html?highlight=distutils.util#distutils.util.strtobool

rootfs/scheduler/resources/pod.py

@@ -217,6 +217,17 @@ def _set_container(self, namespace, container_name, data, **kwargs):
                 "value": "1"
             })
 
+        # Inject POD_IP variable with Pod's IP address
+        if kwargs.get('set_pod_ip') == 'True':
+            data["env"].append({
+                "name": "POD_IP",
+                "valueFrom": {
+                    "fieldRef": {
+                        "fieldPath": "status.podIP",
+                    }
+                }
+            })
+
         # list sorted by dict key name
         data['env'].sort(key=operator.itemgetter('name'))
 
@@ -341,6 +352,7 @@ def _default_readiness_probe(self, container, build_type, port=None):
     This should be added only for the build pack apps when a custom liveness probe is not set to
     make sure that the pod is ready only when the slug is downloaded and started running.
     """
+
     def _default_buildpack_readiness_probe(self, delay=30, timeout=5, period_seconds=5,
                                            success_threshold=1, failure_threshold=1):
         readinessprobe = {