kubernetesrolling-updates

How to wait X second to finish rolling update in k8s?

I am using k8s to deploy my docker apps.

Once app is stated it took 20-30s to be ready, app is huge it took some time while booting.

Boot average time is 20-30s. I would like to wait for 60s during the rolling update. Because for now, old pod is terminated while booting new app (in new pod).

How can I do it?

Solution

  • Configure readiness probe and startup probe in the pod spec with a failureThreshold * periodSeconds long enough to cover the worse case startup time.As an example.

    ports:
- name: readiness-port
  containerPort: 8080
  hostPort: 8080

readinessProbe:
  httpGet:
    path: /healthz
    port: readiness-port
  failureThreshold: 1
  periodSeconds: 10

startupProbe:
  httpGet:
    path: /healthz
    port: readiness-port
  failureThreshold: 30
  periodSeconds: 10