Add Flagger Kustomize installer for Contour

kustomize/README.md

@@ -41,6 +41,14 @@ If you want to install a specific Flagger release, add the version number to the
 kubectl apply -k github.com/weaveworks/flagger//kustomize/linkerd?ref=0.18.0
 ```
 
+Install Flagger for Contour:
+
+```bash
+kubectl apply -k github.com/weaveworks/flagger//kustomize/contour
+```
+
+This deploys Flagger and Prometheus in the `projectcontour` namespace and sets Prometheus to scrape Contour's Envoy instances.
+
 ## Generic installer
 
 Install Flagger and Prometheus:

kustomize/contour/kustomization.yaml

@@ -0,0 +1,8 @@
+namespace: flagger-system
+resources:
+  - namespace.yaml
+bases:
+  - ../base/flagger/
+  - ../base/prometheus/
+patchesStrategicMerge:
+  - patch.yaml

kustomize/contour/namespace.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: projectcontour
+

kustomize/contour/patch.yaml

@@ -0,0 +1,16 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: flagger
+spec:
+  template:
+    spec:
+      containers:
+        - name: flagger
+          args:
+            - -log-level=info
+            - -mesh-provider=contour
+            - -metrics-server=http://flagger-prometheus:9090
+            - -slack-user=flagger
+            - -slack-channel=
+            - -slack-url=