titan-iac/services/communication/mas-admin-client-secret-ensure-job.yaml

# services/communication/mas-admin-client-secret-ensure-job.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
  name: mas-admin-client-secret-writer
  namespace: comms
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: mas-admin-client-secret-writer
  namespace: comms
rules:
  - apiGroups: [""]
    resources: ["secrets"]
    resourceNames: ["mas-admin-client"]
    verbs: ["get", "patch", "update"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: mas-admin-client-secret-writer
  namespace: comms
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: mas-admin-client-secret-writer
subjects:
  - kind: ServiceAccount
    name: mas-admin-client-secret-writer
    namespace: comms
---
apiVersion: batch/v1
kind: Job
metadata:
  name: mas-admin-client-secret-ensure-4
  namespace: comms
spec:
  backoffLimit: 2
  template:
    spec:
      serviceAccountName: mas-admin-client-secret-writer
      restartPolicy: OnFailure
      volumes:
        - name: work
          emptyDir: {}
      initContainers:
        - name: generate
          image: alpine:3.20
          command: ["/bin/sh", "-c"]
          args:
            - |
              set -eu
              umask 077
              dd if=/dev/urandom bs=32 count=1 2>/dev/null | od -An -tx1 | tr -d ' \n' > /work/client_secret
          volumeMounts:
            - name: work
              mountPath: /work
      containers:
        - name: patch
          image: bitnami/kubectl:latest
          command: ["/bin/sh", "-c"]
          args:
            - |
              set -eu
              if [ -n "$(kubectl -n comms get secret mas-admin-client -o jsonpath='{.data.client_secret}' 2>/dev/null || true)" ]; then
                exit 0
              fi
              secret="$(cat /work/client_secret)"
              payload="$(printf '{"stringData":{"client_secret":"%s"}}' "${secret}")"
              kubectl -n comms patch secret mas-admin-client --type=merge -p "${payload}" >/dev/null
          volumeMounts:
            - name: work
              mountPath: /work