Pods' Scheduled Rollout with CronJob

First let's add role, service account and role binding:

kind: ServiceAccount

apiVersion: v1

metadata:

  name: rest-api-deployment-restart-service

  namespace: rest-api-ns-{{ .Values.environment }}

---

apiVersion: rbac.authorization.k8s.io/v1

kind: Role

metadata:

  name: deployment-restart-role

  namespace: rest-api-ns-{{ .Values.environment }}

rules:

  - apiGroups: ["apps", "extensions"]

    resources: ["deployments"]

    resourceNames: ["rest-api-deploy-{{ .Values.environment }}"]

    verbs: ["get", "patch", "list", "watch"]

---

apiVersion: rbac.authorization.k8s.io/v1

kind: RoleBinding

metadata:

  name: deployment-restart-role-binding

  namespace: rest-api-ns-{{ .Values.environment }}

roleRef:

  apiGroup: rbac.authorization.k8s.io

  kind: Role

  name: deployment-restart-role

subjects:

  - kind: ServiceAccount

    name: rest-api-deployment-restart-service

    namespace: rest-api-ns-{{ .Values.environment }}

I'm using helm, so I have {{ .Values.environment }} you can change this to any value

in case you do not leverage Helm.

Next, let's define CronJob:

apiVersion: batch/v1beta1

kind: CronJob

metadata:

  name: rest-api-deployment-restart

  namespace: rest-api-ns-{{ .Values.environment }}

spec:

  concurrencyPolicy: Forbid

  schedule: '*/5 * * * *'

  jobTemplate:

    spec:

      backoffLimit: 2

      activeDeadlineSeconds: 600

      template:

        spec:

          serviceAccountName: rest-api-deployment-restart-service

          restartPolicy: Never

          containers:

            - name: kubectl

              image: bitnami/kubectl

              command:

                - 'kubectl'

                - 'rollout'

                - 'restart'

                - 'deployment/rest-api-deploy-{{ .Values.environment }}'