postgresql: Allow probe tweaking

Uses the standard helm-toolkit macros for liveness and readiness probes,
allowing them to be enabled or disabled, and params to be overridden.

The existing hard-coded settings are preserved as the chart defaults.

Change-Id: Idd063e6b8721126c88fa22c459f93812151d7b64

postgresql/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v9.6
 description: OpenStack-Helm PostgreSQL
 name: postgresql
-version: 0.1.3
+version: 0.1.4
 home: https://www.postgresql.org
 sources:
   - https://github.com/postgres/postgres

postgresql/templates/statefulset.yaml

@@ -12,6 +12,18 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */}}
 
+{{- define "livenessProbeTemplate" -}}
+exec:
+  command:
+    - /tmp/readiness.sh
+{{- end -}}
+
+{{- define "readinessProbeTemplate" -}}
+exec:
+  command:
+    - /tmp/readiness.sh
+{{- end -}}
+
 {{- if .Values.manifests.statefulset }}
 {{- $envAll := . }}
 
@@ -177,20 +189,8 @@ spec:
                   key: 'POSTGRES_USER'
           command:
             - /tmp/start.sh
-          livenessProbe:
-            exec:
-              command:
-                - /tmp/readiness.sh
-            initialDelaySeconds: 30
-            timeoutSeconds: 5
-            failureThreshold: 10
-          readinessProbe:
-            exec:
-              command:
-                - /tmp/readiness.sh
-            initialDelaySeconds: 30
-            timeoutSeconds: 5
-            failureThreshold: 10
+{{ dict "envAll" . "component" "server" "container" "postgresql" "type" "liveness" "probeTemplate" (include "livenessProbeTemplate" . | fromYaml) | include "helm-toolkit.snippets.kubernetes_probe" | trim | indent 10 }}
+{{ dict "envAll" . "component" "server" "container" "postgresql" "type" "readiness" "probeTemplate" (include "readinessProbeTemplate" . | fromYaml) | include "helm-toolkit.snippets.kubernetes_probe" | trim | indent 10 }}
           volumeMounts:
             - name: pod-tmp
               mountPath: /tmp

postgresql/values.yaml

@@ -88,6 +88,21 @@ pod:
         timeout: 30
       server:
         timeout: 180
+  probes:
+    server:
+      postgresql:
+        liveness:
+          enabled: true
+          params:
+            initialDelaySeconds: 30
+            timeoutSeconds: 5
+            failureThreshold: 10
+        readiness:
+          enabled: true
+          params:
+            initialDelaySeconds: 30
+            timeoutSeconds: 5
+            failureThreshold: 10
   resources:
     enabled: false
     server: