[bitnami/apache] Fix chart not being upgradable

Signed-off-by: Javier J. Salmeron Garcia <jsalmeron@bitnami.com>

bitnami/apache/Chart.yaml

@@ -1,5 +1,5 @@
 name: apache
-version: 1.0.0
+version: 2.0.0
 appVersion: 2.4.34
 description: Chart for Apache HTTP Server
 keywords:

bitnami/apache/README.md

@@ -67,3 +67,14 @@ $ helm install --name my-release -f values.yaml bitnami/apache
 ```
 
 > **Tip**: You can use the default [values.yaml](values.yaml)
+
+## Upgrading
+
+### To 2.0.0
+
+Backwards compatibility is not guaranteed unless you modify the labels used on the chart's deployments.
+Use the workaround below to upgrade from versions previous to 2.0.0. The following example assumes that the release name is apache:
+
+```console
+$ kubectl patch deployment apache --type=json -p='[{"op": "remove", "path": "/spec/selector/matchLabels/chart"}]'
+```

bitnami/apache/templates/deployment.yaml

@@ -8,6 +8,10 @@ metadata:
     release: "{{ .Release.Name }}"
     heritage: "{{ .Release.Service }}"
 spec:
+  selector:
+    matchLabels:
+      app: {{ template "fullname" . }}
+      release: "{{ .Release.Name }}"
   replicas: 1
   template:
     metadata: