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Merge pull request #28359 from neolit123/1.22-remove-docker-autodetection-notes 

kubeadm: remove some Docker cgroup driver notes
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Kubernetes Prow Robot 2021-07-06 18:30:43 -07:00 committed by GitHub
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22
content/en/docs/setup/production-environment/tools/kubeadm/troubleshooting-kubeadm.md
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@ -89,23 +89,11 @@ If you notice that `kubeadm init` hangs after printing out the following line:
This may be caused by a number of problems. The most common are: This may be caused by a number of problems. The most common are:
- network connection problems. Check that your machine has full network connectivity before continuing. - network connection problems. Check that your machine has full network connectivity before continuing.
- the default cgroup driver configuration for the kubelet differs from that used by Docker. - the cgroup driver of the container runtime differs from that of the kubelet. To understand how to
Check the system log file (e.g. `/var/log/message`) or examine the output from `journalctl -u kubelet`. If you see something like the following: configure it properly see [Configuring a cgroup driver](/docs/tasks/administer-cluster/kubeadm/configure-cgroup-driver/).
- control plane containers are crashlooping or hanging. You can check this by running `docker ps`
```shell and investigating each container by running `docker logs`. For other container runtime see
error: failed to run Kubelet: failed to create kubelet: [Debugging Kubernetes nodes with crictl](/docs/tasks/debug-application-cluster/crictl/).
misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs"
```
There are two common ways to fix the cgroup driver problem:
1. Install Docker again following instructions
[here](/docs/setup/production-environment/container-runtimes/#docker).
1. Change the kubelet config to match the Docker cgroup driver manually, you can refer to
[Configure cgroup driver used by kubelet on control-plane node](/docs/setup/production-environment/tools/kubeadm/install-kubeadm/#configure-cgroup-driver-used-by-kubelet-on-control-plane-node)
- control plane Docker containers are crashlooping or hanging. You can check this by running `docker ps` and investigating each container by running `docker logs`.
## kubeadm blocks when removing managed containers ## kubeadm blocks when removing managed containers