kubeadm join should support kubelet component config

[BenTheElder]

Is this a BUG REPORT or FEATURE REQUEST?

Choose one: BUG REPORT or FEATURE REQUEST

As far as I can tell KubeletConfiguration while advertised in the kubeadm config docs is not respected during kubeadm join --config, which means we must instead configure kubelet via flags in kubeadm's JoinConfiguration.NodeRegistration.KubeletExtraArgs. This is less than ideal because kubelet flags are often deprecated in favor of the component config fields and we have no way to configure these for nodes via kubeadm.

Ideally specifying a KubeletConfiguration object would work in kubeadm init and kubeadm join via --config, but I'm not sure what happens there yet or what exactly is involved to change this.

kubernetes-sigs/kind#1270

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Versions

kubeadm version (use kubeadm version): kubeadm version: &version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.0", GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf", GitTreeState:"clean", BuildDate:"2020-01-14T00:08:27Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"linux/amd64"}

Environment:

• Kubernetes version (use kubectl version): $ kubectl version Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.1", GitCommit:"d224476cd0730baca2b6e357d144171ed74192d6", GitTreeState:"clean", BuildDate:"2020-01-14T21:04:32Z", GoVersion:"go1.13.5", Compiler:"gc", Platform:"linux/amd64"} Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.0", GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf", GitTreeState:"clean", BuildDate:"2020-01-14T00:09:19Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"linux/amd64"}
• Cloud provider or hardware configuration: kind
• OS (e.g. from /etc/os-release): ~ubuntu
• Kernel (e.g. uname -a): 5.2.17
• Others:

[neolit123]

duplicate of #1682

[BenTheElder]

thanks! I didn't find that one searching, sorry about that!