add flagger to all clusters

apps/flagger/kustomization.yaml

@@ -0,0 +1,8 @@
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: flagger-system
+resources:
+  - namespace.yaml
+  - repository.yaml
+  - release.yaml

apps/flagger/namespace.yaml

@@ -0,0 +1,7 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: flagger-system
+  labels:
+    toolkit.fluxcd.io/tenant: sre-team

apps/flagger/release.yaml

@@ -0,0 +1,26 @@
+---
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: flagger
+  namespace: flagger-system
+spec:
+  interval: 1h
+  releaseName: flagger
+  install: # override existing Flagger CRDs
+    crds: CreateReplace
+  upgrade: # update Flagger CRDs
+    crds: CreateReplace
+  chart:
+    spec:
+      chart: flagger
+      version: 1.x # update Flagger to the latest minor version
+      interval: 6h # scan for new versions every six hours
+      sourceRef:
+        kind: HelmRepository
+        name: flagger
+      verify: # verify the chart signature with Cosign keyless
+        provider: cosign 
+  values:
+    nodeSelector:
+      kubernetes.io/os: linux

apps/flagger/repository.yaml

@@ -0,0 +1,10 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: flagger
+  namespace: flagger-system
+spec:
+  interval: 1h
+  url: oci://ghcr.io/fluxcd/charts
+  type: oci