Update Troubleshooting etcd Nodes

[mrolmedo]

Summary

Hi team,
Our docs for Troubleshooting etcd Nodes are still referring to docker as runtime, although there are not a references for containerd (RKE2).

It might need to be updated. CF https://gist.github.com/superseb/3b78f47989e0dbc1295486c186e944bf#etcd

Thanks

[Tejeev]

These def need an update (came up with customer today). Our internal troubleshooting page shows some permutations of the commands which may be of use too. https://github.com/rancherlabs/support-kb/wiki/One-Liners#etcd

[mrolmedo]

Hi team! Here are more details about we should include:
Check etcd Members on all Nodes
`export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml

etcdcontainer=$(/var/lib/rancher/rke2/bin/crictl ps --label io.kubernetes.container.name=etcd --quiet)
/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer etcdctl --cert /var/lib/rancher/rke2/server/tls/etcd/server-client.crt --key /var/lib/rancher/rke2/server/tls/etcd/server-client.key --cacert /var/lib/rancher/rke2/server/tls/etcd/server-ca.crt endpoint health --cluster --write-out=table`

Check Endpoint Status
`export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml

etcdcontainer=$(/var/lib/rancher/rke2/bin/crictl ps --label io.kubernetes.container.name=etcd --quiet)
/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer etcdctl --cert /var/lib/rancher/rke2/server/tls/etcd/server-client.crt --key /var/lib/rancher/rke2/server/tls/etcd/server-client.key --cacert /var/lib/rancher/rke2/server/tls/etcd/server-ca.crt endpoint health --cluster --write-out=table`

etcdctl alarm list

export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml

etcdcontainer=$(/var/lib/rancher/rke2/bin/crictl ps --label io.kubernetes.container.name=etcd --quiet)
/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer etcdctl --cert /var/lib/rancher/rke2/server/tls/etcd/server-client.crt --key /var/lib/rancher/rke2/server/tls/etcd/server-client.key --cacert /var/lib/rancher/rke2/server/tls/etcd/server-ca.crt alarm list