🌱 VN Agent Healthz Checks

[christopherhein]

This add the ability to use vn-agent with a kubeconfig specified, which works for the Deployment style vs the DaemonSet mechanism as well this added a /healthz endpoint for better checking of it's availability.

[k8s-ci-robot]

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[christopherhein]

/kind feature

[christopherhein]

/assign @charleszheng44 @Fei-Guo

[Fei-Guo]

The envTest fails. Looking at the log

2021-06-03T18:32:39.544Z INFO controllers.VirtualCluster.Native service already exist {"service": "apiserver-svc"} STEP: Faking apiserver STS Status Updates STEP: Creating Control Plane controller-manager StatefulSet 2021-06-03T18:32:45.550Z INFO controllers.VirtualCluster.Native creating secret {"name": "root-ca", "namespace": "default-137bf3-virtualcluster-samplevxjfk"}

There is a 6 seconds gap between service log and creating secret log which looks weird. I only see one Get call in between from code which can be slow.

We probably need to increase the timeout in envTest.

[charleszheng44]

/lgtm