postgres: lower initialDelay and timeout for readiness probe (#318)

* [stable/postgresql] lower initialDelaySeconds of readiness probe

updated health probes to test postgres connection with POD_IP

* postgresql: adjust probe timeouts

stable/postgresql/Chart.yaml

@@ -1,5 +1,5 @@
 name: postgresql
-version: 0.5.0
+version: 0.5.1
 description: Object-relational database management system (ORDBMS) with an emphasis on extensibility and on standards-compliance.
 keywords:
 - postgresql

stable/postgresql/templates/deployment.yaml

@@ -32,21 +32,29 @@ spec:
             secretKeyRef:
               name: {{ template "fullname" . }}
               key: postgres-password
+        - name: POD_IP
+          valueFrom: { fieldRef: { fieldPath: status.podIP } }
         ports:
         - name: postgresql
           containerPort: 5432
         livenessProbe:
           exec:
             command:
-            - pg_isready
+            - sh
+            - -c
+            - exec pg_isready --host $POD_IP
           initialDelaySeconds: 60
-          timeoutSeconds: 3
+          timeoutSeconds: 5
+          failureThreshold: 6
         readinessProbe:
           exec:
             command:
-            - pg_isready
-          initialDelaySeconds: 60
+            - sh
+            - -c
+            - exec pg_isready --host $POD_IP
+          initialDelaySeconds: 5
           timeoutSeconds: 3
+          periodSeconds: 5
         resources:
 {{ toYaml .Values.resources | indent 10 }}
         volumeMounts: