Postgresql: Adding affinity section to deployment (#2585)

* adding affinity setting to postgresql deployment

* bumpding postgresql chart version

* postgresql: fixing a yamllint complain

*   [stable/postgresql] adding affinity to values and readme

stable/postgresql/Chart.yaml

@@ -1,5 +1,5 @@
 name: postgresql
-version: 0.8.3
+version: 0.8.4
 description: Object-relational database management system (ORDBMS) with an emphasis on extensibility and on standards-compliance.
 keywords:
 - postgresql

stable/postgresql/README.md

@@ -71,6 +71,7 @@ The following tables lists the configurable parameters of the PostgresSQL chart
 | `networkPolicy.enabled`    | Enable NetworkPolicy                            | `false`                                                    |
 | `networkPolicy.allowExternal` | Don't require client label for connections   | `true`                                                     |
 | `nodeSelector`             | Node labels for pod assignment                  | {}                                                         |
+| `affinity`                 | Affinity settings for pod assignment            | {}                                                         |
 | `tolerations`              | Toleration labels for pod assignment            | []                                                         |
 
 The above parameters map to the env variables defined in [postgres](http://github.com/docker-library/postgres). For more information please refer to the [postgres](http://github.com/docker-library/postgres) image documentation.

stable/postgresql/templates/deployment.yaml

@@ -13,6 +13,10 @@ spec:
       labels:
         app: {{ template "postgresql.fullname" . }}
     spec:
+      {{- if .Values.affinity }}
+      affinity:
+{{ toYaml .Values.affinity | indent 8 }}
+      {{- end }}
       {{- if .Values.nodeSelector }}
       nodeSelector:
 {{ toYaml .Values.nodeSelector | indent 8 }}

stable/postgresql/values.yaml

@@ -56,18 +56,18 @@ metrics:
     requests:
       memory: 256Mi
       cpu: 100m
-  ## Define additional custom metrics
-  ## ref: https://github.com/wrouesnel/postgres_exporter#adding-new-metrics-via-a-config-file
-  #customMetrics:
-  #  pg_database:
-  #    query: "SELECT d.datname AS name, CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT') THEN pg_catalog.pg_database_size(d.datname) ELSE 0 END AS size FROM pg_catalog.pg_database d where datname not in ('template0', 'template1', 'postgres')"
-  #    metrics:
-  #      - name:
-  #          usage: "LABEL"
-  #          description: "Name of the database"
-  #      - size_bytes:
-  #          usage: "GAUGE"
-  #          description: "Size of the database in bytes"
+    ## Define additional custom metrics
+    ## ref: https://github.com/wrouesnel/postgres_exporter#adding-new-metrics-via-a-config-file
+    # customMetrics:
+    #   pg_database:
+    #     query: "SELECT d.datname AS name, CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT') THEN pg_catalog.pg_database_size(d.datname) ELSE 0 END AS size FROM pg_catalog.pg_database d where datname not in ('template0', 'template1', 'postgres')"
+    #     metrics:
+    #       - name:
+    #           usage: "LABEL"
+    #           description: "Name of the database"
+    #       - size_bytes:
+    #           usage: "GAUGE"
+    #           description: "Size of the database in bytes"
 
 ## Configure resource requests and limits
 ## ref: http://kubernetes.io/docs/user-guide/compute-resources/
@@ -99,3 +99,4 @@ networkPolicy:
 ## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#taints-and-tolerations-beta-feature
 nodeSelector: {}
 tolerations: []
+affinity: {}