What are Kubernetes probes and can you give me some examples?

What are Kubernetes probes and can you give me some examples?

Kubernetes probes are used to check the health of your applications running in a cluster. There are two main types: liveness probes and readiness probes. Liveness probes determine if an application is running, while readiness probes check if it is ready to handle traffic. Would you like to see some specific examples?

Yes, please provide examples of both liveness and readiness probes.

Sure! For a liveness probe, you might use an HTTP GET request to check if your app is alive, like this:

livenessProbe:
  httpGet:
    path: /healthz
    port: 8080
  initialDelaySeconds: 30
  periodSeconds: 10

For a readiness probe, you could use a TCP socket check:

readinessProbe:
  tcpSocket:
    port: 8080
  initialDelaySeconds: 5
  periodSeconds: 10

These configurations help ensure your application is both healthy and ready to serve requests.

How do I know when to use each type of probe?

You should use a liveness probe when you want to restart your application if it becomes unresponsive. Use a readiness probe when you want to ensure your application is fully initialized and ready to handle requests before sending traffic to it.