kubelets blocked due to deprecated cli args

[Kevin W Monroe]

Kube workers on CK 1.23/edge are blocked on initial deployment:

kubernetes-worker 1.23.0 blocked 3 kubernetes-worker charmstore edge 830 ubuntu kubelet-extra-args: add-dir-header is deprecated (+2 others, see juju debug-log)

From debug log:

2021-12-08 15:01:38 WARNING unit.kubernetes-worker/2.juju-log server.go:314 kubelet-extra-args: v is missing from help output
2021-12-08 15:01:38 WARNING unit.kubernetes-worker/2.juju-log server.go:314 proxy-extra-args: v is missing from help output
2021-12-08 15:01:38 WARNING unit.kubernetes-worker/2.juju-log server.go:314 kubelet-extra-args: add-dir-header is deprecated
2021-12-08 15:01:38 WARNING unit.kubernetes-worker/2.juju-log server.go:314 kubelet-extra-args: alsologtostderr is deprecated
2021-12-08 15:01:38 WARNING unit.kubernetes-worker/2.juju-log server.go:314 proxy-extra-args: alsologtostderr is deprecated

Removing these args from k-w's config allows the deployment to settle:

juju config kubernetes-worker kubelet-extra-args=''
juju config kubernetes-worker proxy-extra-args=''

kubernetes-worker 1.23.0 active 3 kubernetes-worker charmstore edge 830 ubuntu Kubernetes worker running.

We need to figure out whether or not these options are needed, and the appropriate place to set them instead of our extra-args config.

[Adam Dyess (addyess)]

The arguments `--add-dir-header` and `--alsologtostderr` are both being deprecated starting in 1.23

https://github.com/kubernetes/enhancements/tree/master/keps/sig-instrumentation/2845-deprecate-klog-specific-flags-in-k8s-components#removed-klog-flags

[Adam Dyess (addyess)]

This is true for both kubelet and kube-proxy

[Adam Dyess (addyess)]

Updated to integration tests
https://github.com/charmed-kubernetes/jenkins/pull/768