Add startup probe for postgres (#763)

charts/postgres/Chart.yaml

@@ -7,6 +7,6 @@ type: application
 maintainers:
   - name: groundhog2k
 
-version: 0.3.1
+version: 0.3.2
 
 appVersion: "14.1"

charts/postgres/README.md

 # PostgreSQL
 
-![Version: 0.3.1](https://img.shields.io/badge/Version-0.3.1-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 14.1](https://img.shields.io/badge/AppVersion-14.1-informational?style=flat-square)
+![Version: 0.3.2](https://img.shields.io/badge/Version-0.3.2-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 14.1](https://img.shields.io/badge/AppVersion-14.1-informational?style=flat-square)
 
 A Helm chart for PostgreSQL on Kubernetes
 
@@ -59,8 +59,10 @@ $ helm uninstall my-release
 | image.repository | string | `"postgres"` | Image name |
 | image.tag | string | `""` | Image tag |
 | imagePullSecrets | list | `[]` | Image pull secrets |
+| startupProbe | object | `see values.yaml` | Startup probe configuration |
 | livenessProbe | object | `see values.yaml` | Liveness probe configuration |
 | readinessProbe | object | `see values.yaml` | Readiness probe configuration |
+| customStartupProbe | object | `{}` | Custom startup probe (overwrites default startup probe configuration) |
 | customLivenessProbe | object | `{}` | Custom liveness probe (overwrites default liveness probe configuration) |
 | customReadinessProbe | object | `{}` | Custom readiness probe (overwrites default readiness probe configuration) |
 | resources | object | `{}` | Resource limits and requests |

charts/postgres/templates/statefulset.yaml

@@ -64,6 +64,26 @@ spec:
           envFrom:
             - secretRef:
                 name: {{ include "postgres.fullname" . }}
+          {{- if .Values.customStartupProbe }}
+          startupProbe:
+            {{- toYaml .Values.customStartupProbe | nindent 12 }}
+          {{- else }}
+          {{- if .Values.startupProbe.enabled }}
+          startupProbe:
+            exec:
+              command:
+                - sh
+                - -c
+                - pg_isready -h localhost
+          {{- with .Values.startupProbe }}
+            initialDelaySeconds: {{ .initialDelaySeconds }}
+            timeoutSeconds: {{ .timeoutSeconds }}
+            failureThreshold: {{ .failureThreshold }}
+            successThreshold: {{ .successThreshold }}
+            periodSeconds: {{ .periodSeconds }}                
+          {{- end }}
+          {{- end }}
+          {{- end }}
           {{- if .Values.customLivenessProbe }}
           livenessProbe:
             {{- toYaml .Values.customLivenessProbe | nindent 12 }}

charts/postgres/values.yaml

@@ -73,6 +73,18 @@ affinity: {}
 ## Maximum number of revisions maintained in revision history
 revisionHistoryLimit:
 
+## Custom startup probe (overwrites default startup probe)
+customStartupProbe: {}
+
+## Default startup check
+startupProbe:
+  enabled: true
+  initialDelaySeconds: 10
+  timeoutSeconds: 5
+  failureThreshold: 30
+  successThreshold: 1
+  periodSeconds: 10
+
 ## Custom liveness probe (overwrites default liveness probe)
 customLivenessProbe: {}