homelab/k8s/applications/temporal/db-secret-sync/copy-job.yaml

# Copies the CNPG-generated temporal-db-role Secret from the ddb namespace
# into the temporal namespace, as a plain (non-SOPS) k8s Secret with the same
# keys. Kubernetes Secrets are strictly namespace-scoped - a Deployment in
# `temporal` cannot reference a Secret living in `ddb` via secretKeyRef, and
# temporal-values.yaml's server.config.persistence.*.sql.existingSecret:
# temporal-db-role expects to find it in ITS OWN namespace (temporal).
#
# Deliberately a standalone directory (no kustomization.yaml) applied as its
# own small Application - avoids the k8s/applications/temporal/kustomization.yaml
# `namespace: temporal` transformer, which would silently force-rewrite this
# Job's ddb-scoped RoleBinding back to temporal (same class of bug fixed
# earlier in k8s/security/iam/kustomization.yaml - see that file's comments).
#
# PreSync + BeforeHookCreation: reruns on every ArgoCD sync of the temporal
# app group, so it re-copies the password if CNPG ever rotates it. Runs
# before the main `temporal` Application (sync-wave 8) since this app is
# registered at sync-wave 7.
apiVersion: v1
kind: ServiceAccount
metadata:
  name: temporal-db-secret-sync
  namespace: temporal
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: temporal-db-secret-sync
rules:
  - apiGroups: [""]
    resources: ["secrets"]
    verbs: ["get", "list", "create", "update", "patch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: temporal-db-secret-sync
  namespace: ddb
subjects:
  - kind: ServiceAccount
    name: temporal-db-secret-sync
    namespace: temporal
roleRef:
  kind: ClusterRole
  name: temporal-db-secret-sync
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: temporal-db-secret-sync
  namespace: temporal
subjects:
  - kind: ServiceAccount
    name: temporal-db-secret-sync
    namespace: temporal
roleRef:
  kind: ClusterRole
  name: temporal-db-secret-sync
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: batch/v1
kind: Job
metadata:
  name: temporal-db-secret-sync
  namespace: temporal
  annotations:
    argocd.argoproj.io/hook: PreSync
    argocd.argoproj.io/hook-delete-policy: BeforeHookCreation
spec:
  ttlSecondsAfterFinished: 600
  backoffLimit: 5
  template:
    spec:
      serviceAccountName: temporal-db-secret-sync
      restartPolicy: Never
      securityContext:
        runAsNonRoot: true
        runAsUser: 1000
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: copy
          image: bitnami/kubectl:1.30
          securityContext:
            allowPrivilegeEscalation: false
            capabilities:
              drop: ["ALL"]
          command:
            - /bin/sh
            - -c
            - |
              set -e
              echo "waiting for ddb/temporal-db-role..."
              until kubectl -n ddb get secret temporal-db-role >/dev/null 2>&1; do
                echo "  not ready yet, retrying..."
                sleep 5
              done
              USERNAME=$(kubectl -n ddb get secret temporal-db-role -o jsonpath='{.data.username}' | base64 -d)
              PASSWORD=$(kubectl -n ddb get secret temporal-db-role -o jsonpath='{.data.password}' | base64 -d)
              kubectl -n temporal create secret generic temporal-db-role \
                --from-literal=username="$USERNAME" \
                --from-literal=password="$PASSWORD" \
                --dry-run=client -o yaml | kubectl apply -f -
              echo "synced temporal-db-role -> temporal namespace"