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Question 18 | Fix Kubelet

 

There seems to be an issue with the kubelet not running on cluster3-worker1. Fix it and confirm that cluster has node cluster3-worker1 available in Ready state afterwards. You should be able to schedule a Pod on cluster3-worker1 afterwards.

Write the reason of the issue into /opt/course/18/reason.txt.

 

Answer:

The procedure on tasks like these should be to check if the kubelet is running, if not start it, then check its logs and correct errors if there are some.

Always helpful to check if other clusters already have some of the components defined and running, so you can copy and use existing config files. Though in this case it might not need to be necessary.

Check node status:

First we check if the kubelet is running:

Nope, so we check if its configured using systemd as service:

Yes, its configured as a service with config at /etc/systemd/system/kubelet.service.d/10-kubeadm.conf, but we see its inactive. Let's try to start it:

We see its trying to execute /usr/local/bin/kubelet with some parameters defined in its service config file. A good way to find errors and get more logs is to run the command manually (usually also with its parameters).

Another way would be to see the extended logging of a service like using journalctl -u kubelet.

Well, there we have it, wrong path specified. Correct the path in file /etc/systemd/system/kubelet.service.d/10-kubeadm.conf and run:

Also the node should be available for the api server, give it a bit of time though:

Finally we write the reason into the file:


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