When running the script "cluster-backup.sh" on the arbiter node the script fails with error below:

~~~
[root@tna-arbiter ~]# /usr/local/bin/cluster-backup.sh /root/backup-etcd-test/

Certificate /etc/kubernetes/static-pod-certs/configmaps/etcd-all-bundles/server-ca-bundle.crt is missing. Checking in different directory
Certificate /etc/kubernetes/static-pod-resources/etcd-certs/configmaps/etcd-all-bundles/server-ca-bundle.crt found!
error finding manifests for the kube-apiserver pod. please check if it is running.

[root@tna-arbiter ~]# kubelet --version
Kubernetes v1.33.5

# oc get node tna-arbiter -o wide

NAME          STATUS   ROLES     AGE    VERSION   INTERNAL-IP       EXTERNAL-IP   OS-IMAGE                                                KERNEL-VERSION                 CONTAINER-RUNTIME
tna-arbiter   Ready    arbiter   5d1h   v1.33.5   192.168.122.167   <none>        Red Hat Enterprise Linux CoreOS 9.6.20250925-0 (Plow)   5.14.0-570.49.1.el9_6.x86_64   cri-o://1.33.4-4.rhaos4.20.gitc8e7df2.el9
~~~

Arbiter doesn't run the kube apiserver.

Basically it is not that important, but it should be either addressed in the docs or that script should be removed from the arbiter node.

OpenShift Container Platform 4.20.0-rc.3    

run the cluster-backup.sh on the arbiter node    

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