Allow web deployment value to be configured through values (#788)

* Allow web deployment value to be configured through values

This will let us switch to e.g. Argo Rollouts

* Bump version

* fix syntax

charts/posthog/Chart.yaml

@@ -11,7 +11,7 @@ type: application
 
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
-version: 30.41.0
+version: 30.42.0
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application.

charts/posthog/templates/web-deployment.yaml

@@ -1,6 +1,6 @@
 {{- if .Values.web.enabled -}}
-apiVersion: apps/v1
-kind: Deployment
+apiVersion: {{ .Values.web.deployment.apiVersion }}
+kind: {{ .Values.web.deployment.kind }}
 metadata:
   name: {{ template "posthog.fullname" . }}-web
   labels: {{- include "_snippet-metadata-labels-common" . | nindent 4 }}
@@ -16,10 +16,22 @@ spec:
   {{- end }}
 
   strategy:
+    {{- if eq .Values.web.deployment.strategy "rollingUpdate" }}
     type: RollingUpdate
     rollingUpdate:
       maxSurge: {{ .Values.web.rollout.maxSurge }}
       maxUnavailable: {{ .Values.web.rollout.maxUnavailable }}
+    {{- else if eq .Values.web.deployment.strategy "canary" }}
+    canary:
+      steps:
+      - setWeight: 1
+      - pause: {duration: 60s}
+      - setWeight: 10
+      - pause: {duration: 60s}
+      - setWeight: 50
+      - pause: {duration: 60s}
+      - setWeight: 100
+    {{- end }}
 
   template:
     metadata:

charts/posthog/values.yaml

@@ -191,6 +191,11 @@ web:
 
   image: {}
 
+  deployment:
+    apiVersion: apps/v1
+    kind: Deployment
+    strategy: rollingUpdate
+
   podAnnotations:
     # Uncomment these lines if you want Prometheus server to scrape metrics.
     # prometheus.io/scrape: "true"