I'm creating multiple pods at the same time in Openshift, and I also want to check the containers inside the pods are working correctly. Some of these containers can take a while to start-up, and I don't want to wait for one pod to be fully running before starting up the other one.
Are there any Openshift / Kubernetes checks I can do to ensure a container has booted up, while also going ahead with other deployments?
Please configure the Liveness and Readiness Probes
- Liveness : Under what circumstances is it appropriate to restart the pod?
- Readiness : under what circumstances should we take the pod out of the list of service endpoints so that it no longer responds to requests?
...Some of these containers can take a while to start-up
Liveness probe is not a good option for containers that requires extended startup time, mainly because you have to set a long time to cater for startup; which is irrelevant after that - result to unable to detect problem on time during execution. Instead, you use startup probe to handle and detect problem during startup and handover to liveness probe upon success; or restart container according to its restartPolicy should the startup probe failed.
