Setting up cluster on VMs
Hi there, I've been following the guide installing all the needed dependencies and following the required steps. But it seems the pods can never get into a ready state and stay that way.
When getting the pods this is what is shown:
[email protected]:~$ kubectl get pods --all-namespaces NAMESPACE NAME READY STATUS RESTARTS AGE kube-system calico-kube-controllers-55fc758c88-fws4q 0/1 CrashLoopBackOff 6 (3m15s ago) 11m kube-system calico-node-p9pxg 0/1 CrashLoopBackOff 6 (2m37s ago) 11m kube-system coredns-57575c5f89-9vbxf 0/1 CrashLoopBackOff 5 (26s ago) 11m kube-system coredns-57575c5f89-xgt4r 1/1 Running 6 (3m40s ago) 11m kube-system etcd-k8s-cp-ubu 1/1 Running 146 (9m36s ago) 13m kube-system kube-apiserver-k8s-cp-ubu 1/1 Running 159 (53s ago) 13m kube-system kube-controller-manager-k8s-cp-ubu 0/1 CrashLoopBackOff 209 (2m13s ago) 13m kube-system kube-proxy-zn5vd 0/1 CrashLoopBackOff 5 (2m32s ago) 11m kube-system kube-scheduler-k8s-cp-ubu 0/1 CrashLoopBackOff 212 (101s ago) 13m
It seems all the pods are restarting to some extent. Even though the control plane is in ready state.
[email protected]:~$ kubectl get nodes -o wide NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME k8s-cp-ubu Ready control-plane 70m v1.24.10 192.168.100.6 <none> Ubuntu 22.04.1 LTS 5.15.0-60-generic containerd://1.6.16
In general, looking at the logs for each pod either have no error logs or in one case (I can't reproduce it) mentioned a timeout for UDP on 192.168.100.6, on the core-dns pod.
Would anyone have any additional troubleshooting tips or suggestions for how to pass this state. I've been stuck for a while and haven't been able to get to an actual running control plane.
Comments
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Hi @farazoman,
First, I'd recommend ensuring that the local VMs are assigned IP addresses that are not overlapping the 192.168.0.0/16 network, which will eventually be used for the application pods network layer implemented by the Calico CNI plugin (please revisit the Summary section of the Lab exercise 2.1: Overview and Preliminaries).
Second, please use the guest OS noted in the lab guide - Ubuntu 20.04 LTS (in the same exercise Overview and Preliminaries)
And third, please install the Kubernetes version recommended by the lab guide - v1.26.1 (step 4 of Lab exercise 2.2, and as provided in the k8scp.sh installation and config script).
Regards,
-Chris1 -
thanks for the advice, I'll review the docs but I just noticed I messed up in posting in the wrong class, I"m actually taking LFS258.
Few things to take away though,
1. use ubuntu 20.04
2. update ips (assuming the same problem of ips applies to LFS258
3. use 1.25 (from 258 slides), although I don't imagine this being critical to the rest of the courseAddtionally, just to avoid double posting, I won't put it on the other class forum unless you suggest otherwise. Thanks!
0 -
This thread was moved to the correct forum, LFS258.
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