[bitnami/nginx] Fix chart not being upgradable

bitnami/nginx/Chart.yaml

@@ -1,5 +1,5 @@
 name: nginx
-version: 0.6.1
+version: 1.0.0
 appVersion: 1.14.0
 description: Chart for the nginx server
 keywords:

bitnami/nginx/README.md

@@ -88,3 +88,14 @@ Install the chart with this value:
 ```console
 $ helm install --name my-release -f custom-vhost.yaml bitnami/nginx
 ```
+
+## Upgrading
+
+### To 1.0.0
+
+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 1.0.0. The following example assumes that the release name is nginx:
+
+```console
+$ kubectl patch deployment nginx --type=json -p='[{"op": "remove", "path": "/spec/selector/matchLabels/chart"}]'
+```

bitnami/nginx/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: