update rollout behaviour (#12)

- redeploy only if vcl content has changed (needs `rolloutDeployment: false`)
- add switch to disable auto rollout on each upgrade.

Chart.yaml

@@ -2,5 +2,5 @@ apiVersion: v2
 name: varnish
 description: A Varnish Cache Helm chart for Kubernetes
 type: application
-version: 0.6.0
+version: 0.6.1
 appVersion: 6.4

templates/deployment.yaml

@@ -21,7 +21,12 @@ spec:
         app: {{ include "varnish.name" . }}
         version: {{ .Chart.Version }}
       annotations:
+      {{- if .Values.vcl }}
+        checksum/vclConfig: {{ include (print $.Template.BasePath "/vcl-configmap.yaml") . | sha256sum }}
+      {{- end }}
+      {{- if .Values.rolloutDeployment }}
         rollme: {{ randAlphaNum 5 | quote }}
+      {{- end }}
       {{- if and .Values.prometheus.enabled .Values.prometheus.scrape }}
         prometheus.io/scrape: "true"
         prometheus.io/path: "{{ .Values.prometheus.path }}"

values.yaml

@@ -97,6 +97,9 @@ vcl: {}
 # example: vclConfigmap: my-vcl-configmap
 vclConfigmap: null
 
+# rollout deployment with each upgrade
+rolloutDeployment: true
+
 logging:
   enabled: true
   customOutput: null