[stable/postgresql] Add affinity parameter. (#9114)

Signed-off-by: Cédric de Saint Martin <cdesaintmartin@wiremind.fr>

stable/postgresql/Chart.yaml

@@ -1,5 +1,5 @@
 name: postgresql
-version: 2.4.0
+version: 2.5.0
 appVersion: 10.6.0
 description: Chart for PostgreSQL, an object-relational database management system (ORDBMS) with an emphasis on extensibility and on standards-compliance.
 keywords:

stable/postgresql/README.md

@@ -78,6 +78,7 @@ The following tables lists the configurable parameters of the PostgreSQL chart a
 | `persistence.annotations`                     | Annotations for the PVC                            | `{}`                                                      |
 | `resources`                                   | CPU/Memory resource requests/limits                | `nil`                                                     |
 | `nodeSelector`                                | Node labels for pod assignment                     | `{}`                                                      |
+| `affinity`                                    | Affinity labels for pod assignment                 | `{}`                                                      |
 | `tolerations`                                 | Toleration labels for pod assignment               | `[]`                                                      |
 | `terminationGracePeriodSeconds`               | Seconds the pod needs to terminate gracefully      | `nil`                                                     |
 | `resources`                                   | CPU/Memory resource requests/limits                | Memory: `256Mi`, CPU: `250m`                              |

stable/postgresql/templates/statefulset-slaves.yaml

@@ -42,6 +42,10 @@ spec:
       {{- if .Values.nodeSelector }}
       nodeSelector:
 {{ toYaml .Values.nodeSelector | indent 8 }}
+      {{- end }}
+      {{- if .Values.affinity }}
+      affinity:
+{{ toYaml .Values.affinity | indent 8 }}
       {{- end }}
       {{- if .Values.tolerations }}
       tolerations:

stable/postgresql/templates/statefulset.yaml

@@ -41,6 +41,10 @@ spec:
       {{- if .Values.nodeSelector }}
       nodeSelector:
 {{ toYaml .Values.nodeSelector | indent 8 }}
+      {{- end }}
+      {{- if .Values.affinity }}
+      affinity:
+{{ toYaml .Values.affinity | indent 8 }}
       {{- end }}
       {{- if .Values.tolerations }}
       tolerations:

stable/postgresql/values.yaml

@@ -108,10 +108,12 @@ persistence:
   size: 8Gi
   annotations: {}
 
-## Node labels and tolerations for pod assignment
+## Node, affinity and tolerations labels for pod assignment
 ## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector
+## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
 ## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#taints-and-tolerations-beta-feature
 nodeSelector: {}
+affinity: {}
 tolerations: []
 
 ## Configure resource requests and limits