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fixes troubleshooting-kubeadm references to taint node-role.kubernetes.io/master (#19293) 

* fixes troubleshooting-kubeadm references to taint node-role.kubernetes.io/master

Signed-off-by: Marshall Ford <inbox@marshallford.me>

* revert ja,zsh langs

Signed-off-by: Marshall Ford <inbox@marshallford.me>
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Marshall Ford 2020-03-11 10:13:37 -05:00 committed by GitHub
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content/en/docs/setup/production-environment/tools/kubeadm/troubleshooting-kubeadm.md
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@ -307,17 +307,17 @@ The tracking issue for this problem is [here](https://github.com/kubernetes/kube
*Note: This [issue](https://github.com/kubernetes/kubeadm/issues/1358) only applies to tools that marshal kubeadm types (e.g. to a YAML configuration file). It will be fixed in kubeadm API v1beta2.*
By default, kubeadm applies the `role.kubernetes.io/master:NoSchedule` taint to control-plane nodes.
By default, kubeadm applies the `node-role.kubernetes.io/master:NoSchedule` taint to control-plane nodes.
If you prefer kubeadm to not taint the control-plane node, and set `InitConfiguration.NodeRegistration.Taints` to an empty slice,
the field will be omitted when marshalling. When the field is omitted, kubeadm applies the default taint.
There are at least two workarounds:
1. Use the `role.kubernetes.io/master:PreferNoSchedule` taint instead of an empty slice. [Pods will get scheduled on masters](/docs/concepts/configuration/taint-and-toleration/), unless other nodes have capacity.
1. Use the `node-role.kubernetes.io/master:PreferNoSchedule` taint instead of an empty slice. [Pods will get scheduled on masters](/docs/concepts/configuration/taint-and-toleration/), unless other nodes have capacity.
2. Remove the taint after kubeadm init exits:
```bash
kubectl taint nodes NODE_NAME role.kubernetes.io/master:NoSchedule-
kubectl taint nodes NODE_NAME node-role.kubernetes.io/master:NoSchedule-
```
## `/usr` is mounted read-only on nodes {#usr-mounted-read-only}