Merge pull request #430 from heubeck/eventhookUrlFromEnv

Add webhookUrl env parameter

charts/flagger/values.yaml

@@ -57,6 +57,11 @@ podMonitor:
 #    secretKeyRef:
 #      name: msteams
 #      key: url
+#- name: EVENT_WEBHOOK_URL
+#  valueFrom:
+#    secretKeyRef:
+#      name: eventwebhook
+#      key: url
 env: []
 
 leaderElection:

cmd/flagger/main.go

@@ -202,7 +202,7 @@ func main() {
 		observerFactory,
 		meshProvider,
 		version.VERSION,
-		eventWebhook,
+		fromEnv("EVENT_WEBHOOK_URL", eventWebhook),
 	)
 
 	// leader election context

docs/gitbook/usage/alerting.md

@@ -62,6 +62,9 @@ helm upgrade -i flagger flagger/flagger \
 --set eventWebhook=https://example.com/flagger-canary-event-webhook
 ```
 
+The environment variable *EVENT_WEBHOOK_URL* can be used for activating the event-webhook, too.
+This is handy for using a secret to store a sensible value that could contain api keys for example.
+
 When configured, every action that Flagger takes during a canary deployment will be sent as JSON via an HTTP POST
 request. The JSON payload has the following schema: