Add support for Google Cloud SQL to use as a backend (#6016)

* added cloud sql proxy container

* Add cloud sql proxy

* make changes on stable/drone

* update for general usage [stable/drone]

* Bump minor version for new feature

stable/drone/Chart.yaml

@@ -1,7 +1,7 @@
 name: drone
 home: https://drone.io/
 icon: https://drone.io/apple-touch-icon.png
-version: 1.2.0
+version: 1.3.0
 appVersion: 0.8.5
 description: Drone is a Continuous Delivery system built on container technology
 keywords:

stable/drone/README.md

@@ -56,6 +56,8 @@ The following table lists the configurable parameters of the drone charts and th
 | `server.resources`          | Drone **server** pod resource requests & limits                                               | `{}`                        |
 | `server.schedulerName`      | Drone **server** alternate scheduler name                                                     | `nil`                       |
 | `server.affinity`           | Drone **server** scheduling preferences                                                       | `{}`                        |
+| `server.extraContainers`    | Additional sidecar containers | `""` |
+| `server.extraVolumes`       | Additional volumes for use in extraContainers | `""` |
 | `agent.env`                 | Drone **agent** environment variables                                                         | `(default values)`          |
 | `agent.replicas`            | Drone **agent** replicas                                                                      | `1`                         |
 | `agent.annotations`         | Drone **agent** annotations                                                                   | `{}`                        |

stable/drone/templates/deployment-server.yaml

@@ -76,6 +76,9 @@ spec:
         volumeMounts:
           - name: data
             mountPath: /var/lib/drone
+{{- with .Values.server.extraContainers }}
+{{ tpl . $ | indent 6 }}
+{{- end }}
       volumes:
       - name: data
       {{- if .Values.persistence.enabled }}
@@ -84,4 +87,7 @@ spec:
       {{- else }}
         emptyDir: {}
       {{- end -}}
+{{- with .Values.server.extraVolumes }}
+{{ tpl . $ | indent 6 }}
+{{- end }}
 {{ end }}

stable/drone/values.yaml

@@ -122,6 +122,13 @@ server:
   ##
   affinity: {}
 
+  ## additional siecar containers, e. g. for a database proxy, such as Google's cloudsql-proxy.
+  ## ex: https://github.com/kubernetes/charts/tree/master/stable/keycloak
+  extraContainers: |
+
+  ## additional volumes, e. g. for secrets used in an extraContainers.
+  extraVolumes: |
+
 agent:
   ## Drone agent configuration.
   ## Values in here get injected as environment variables.