Add registry cred Deployments/CronJobs for aws/gcp/azure via kustomize

Signed-off-by: leigh capili <leigh@null.net>

manifests/integrations/registry-credentials-sync/_cronjobs/_base/kustomization.yaml

@@ -0,0 +1,20 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+commonLabels:
+  app: credentials-sync
+
+resources:
+- sync.yaml
+
+vars:
+- name: KUBE_SECRET
+  objref:
+    kind: ConfigMap
+    name: credentials-sync
+    apiVersion: v1
+  fieldref:
+    fieldpath: data.KUBE_SECRET
+
+configurations:
+- kustomizeconfig.yaml

manifests/integrations/registry-credentials-sync/_cronjobs/_base/kustomizeconfig.yaml

@@ -0,0 +1,3 @@
+varReference:
+- path: rules/resourceNames
+  kind: Role

manifests/integrations/registry-credentials-sync/_cronjobs/_base/sync.yaml

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+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: credentials-sync
+data:
+  # Patch this ConfigMap with additional values needed for your cloud
+  KUBE_SECRET: my-registry-token  # does not yet exist -- will be created in the same Namespace
+
+---
+# This CronJob frequently fetches registry tokens and applies them as an imagePullSecret.
+# note: CronJob scheduling can block cluster bootstraps and cold-reboots from obtaining registry tokens for a considerable time.
+# To run the job immediately, do `kubectl create job --from=cronjob/credentials-sync -n flux-system credentials-sync-init`
+apiVersion: batch/v1beta1
+kind: CronJob
+metadata:
+  name: credentials-sync
+  namespace: flux-system
+spec:
+  suspend: false
+  schedule: 0 */6 * * *
+  failedJobsHistoryLimit: 1
+  successfulJobsHistoryLimit: 1
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          serviceAccountName: credentials-sync
+          restartPolicy: Never
+          containers:
+          - image: busybox  # override this with a cloud-specific image
+            name: sync
+            envFrom:
+            - configMapRef:
+                name: credentials-sync
+            env:
+            - name: RECONCILE_SH  # override this env var with a shell function in a kustomize patch
+              value: |-
+                reconcile() {
+                  echo reconciling...
+                }
+            command:
+            - bash
+            - -ceu
+            - |-
+              # template reconcile() into the script
+              # env var is expanded by k8s before the pod starts
+              $(RECONCILE_SH)
+
+              apply-secret() {
+                /kbin/kubectl create secret docker-registry "${1}" \
+                  --docker-server="${2}" \
+                  --docker-username="${3}" \
+                  --docker-password="${4}" \
+                  --dry-run=client -o=yaml \
+                  | grep -v "creationTimestamp:" \
+                  | /kbin/kubectl apply -f -
+              }
+
+              reconcile
+            resources: {}
+
+
+# RBAC necessary for our Deployment to apply our imagePullSecret
+---
+kind: Role
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: credentials-sync
+  namespace: flux-system
+rules:
+- apiGroups: [""]
+  resources:
+  - secrets
+  verbs:
+  - get
+  - create
+  - update
+  - patch
+  # # Lock this down to the specific Secret name  (Optional)
+  resourceNames:
+  - $(KUBE_SECRET)  # templated from kustomize vars referencing ConfigMap, also see kustomizeconfig.yaml
+---
+kind: RoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: credentials-sync
+  namespace: flux-system
+subjects:
+- kind: ServiceAccount
+  name: credentials-sync
+roleRef:
+  kind: Role
+  name: credentials-sync
+  apiGroup: rbac.authorization.k8s.io
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: credentials-sync
+  namespace: flux-system