Add extra health check for k8s installation

[kahou82]

Currently, contiv k8s installation only check contiv related pod status. This is not sufficient enough as there is a chance that we cannot run any other pod.

This ticket is to enhance k8s installation to ensure that we can start a regular pod successfully.

Signed-off-by: Kahou Lei [email protected]

[unclejack]

@kahou82: I've looked into this. Unfortunately, we need to add this check after default-net is created. The bootstrap of the cluster never finishes otherwise. The default-net isn't created if we don't finish the setup without error in install.sh. A good place to have this test would be after this block https://github.com/contiv/install/blob/master/scripts/kubeadm_test.sh#L57

Once the pod is fine, we should also clean it up.

[neelimamukiri]

+1 to @unclejack that we need the default-net created before the pods can run. I dont think we want to check all namespaces as system namespace will have pods running with host=net.

If possible, can you add a message saying that installation is complete and you are starting some kind of a self test. That way if things do fail people will know what to do next - may be point them to contiv support FAQ page or something :)