Readiness and liveness probe types in Kubernetes

HTTP Test - /api/ready

readinessProbe:
  httpGet:
    path: /api/ready
    port: 8080

TCP Test - 3306

readinessProbe:
  tcpSocket:
    port: 3306

Exec Command

readinessProbe:
  exec:
    command:
    - cat
    - /app/is_ready

There are additional options to consider:

• readinessProbe.initialDelaySeconds - if your application needs a time to warm-up
• readinessProbe.periodSeconds - specify how often to probe
• readinessProbe.failureThreshold - if you want to make more attempts to probe (default - 3)

Same implies to liveness probes: just replace readinessProbe with livenessProbe