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Update install-kubeadm.md (SELinux note) 

Added a note regarding the possibility of keeping SELinux enabled for advanced users at own risk.

Update content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md

Co-Authored-By: Jim Angel <jimangel@users.noreply.github.com>

Clean up text from rebase

Revert "Clean up text from rebase"

This reverts commit ac82a7f1981fe6e09ba1e101b372fa6d154125d2.

Clean up rebase text
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jfcgaspar 2020-04-22 17:01:55 +01:00 committed by jfcgaspar
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@ -210,12 +210,14 @@ yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
systemctl enable --now kubelet
```
**Note:**
**Notes:**
- Setting SELinux in permissive mode by running `setenforce 0` and `sed ...` effectively disables it.
This is required to allow containers to access the host filesystem, which is needed by pod networks for example.
You have to do this until SELinux support is improved in the kubelet.
- You can leave SELinux enabled if you know how to configure it but it may require settings that are not supported by kubeadm.
{{% /tab %}}
{{% tab name="Container Linux" %}}
Install CNI plugins (required for most pod network):