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kubernetesprobe

How to put two ports in "livenessProbe"?

My legacy server listens on two TCP ports. I want to put livenessProbe and readinessProbe on two ports. For single port it looks like the following. How to do it for 2 ports ?

livenessProbe:
  tcpSocket:
    port: 15772
  initialDelaySeconds: 10
  periodSeconds: 5
  failureThreshold: 5
readinessProbe:
  tcpSocket:
    port: 15772
initialDelaySeconds: 10
periodSeconds: 5
timeoutSeconds: 5
Solution

  • There are some paths to your goal. If you own the project running in the container, you can define a http endpoint like /heathz or /ready with your logic to achieve this. Otherwise, the project is a third-part one, you could write a shell to check ports like as follows:

    healthcheck.sh

    for port in 80 22
do nc -z localhost $port && echo "$port is up";
done

    this shell will output (if 80 and 22 are listening):

    80 is up
22 is up

    and then, use exec probe:

    livenessProbe:
      exec:
        command:
        - /path/to/healthcheck.sh
...