chore(database): add persistence

Author: duanhongyi

charts/database/templates/database-deployment.yaml

@@ -74,7 +74,16 @@ spec:
               mountPath: /var/run/secrets/drycc/database/creds
             - name: objectstore-creds
               mountPath: /var/run/secrets/drycc/objectstore/creds
+            {{- if .Values.persistence.enabled }}
+            - name: database-data
+              mountPath: /var/lib/postgresql
+            {{- end }}
       volumes:
+        {{- if .Values.persistence.enabled }}
+        - name: database-data
+          persistentVolumeClaim:
+            claimName: drycc-database
+        {{- end }}
         - name: database-creds
           secret:
             secretName: database-creds

charts/database/templates/database-pvc.yaml

@@ -0,0 +1,24 @@
+{{- if .Values.persistence.enabled }}
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: drycc-database
+  labels:
+    heritage: drycc
+spec:
+  accessModes:
+    - {{ .Values.persistence.accessMode | quote }}
+  resources:
+    requests:
+      storage: {{ .Values.persistence.size | quote }}
+{{- if .Values.persistence.storageClass }}
+{{- if (eq "-" .Values.persistence.storageClass) }}
+  storageClassName: ""
+{{- else }}
+  storageClassName: "{{ .Values.persistence.storageClass }}"
+{{- end }}
+{{- end }}
+{{- if .Values.persistence.volumeName }}
+  volumeName: "{{ .Values.persistence.volumeName }}"
+{{- end }}
+{{- end }}

charts/database/values.yaml

@@ -7,6 +7,22 @@ imageRegistry: "docker.io"
 # limitsHugepages2Mi: 100Mi
 # limitsHugepages1Gi: 2Gi
 timeout: "1200"
+# GCP PDs and EBS volumes are supported only
+persistence:
+  enabled: false # Set to true to enable persistence
+  accessMode: ReadWriteOnce
+  size: 5Gi # PVC size
+  ## database data Persistent Volume Storage Class
+  ## If defined, storageClassName: <storageClass>
+  ## If set to "-", storageClassName: "", which disables dynamic provisioning
+  ## If undefined (the default) or set to null, no storageClassName spec is
+  ##   set, choosing the default provisioner.  (gp2 on AWS, standard on
+  ##   GKE, AWS & OpenStack)
+  ##
+  ## Storage class of PV to bind. By default it looks for standard storage class.
+  ## If the PV uses a different storage class, specify that here.
+  storageClass: ""
+  volumeName: ""
 # The username and password to be used by the on-cluster database.
 # If left empty they will be generated using randAlphaNum
 username: ""