Got it. Thanks.
Now, what is the correct procedure for rejoining the cluster? I restored the SSH keys and network configuration. I have the corosync configuration and authkey. I probably messed up the first time around, but I wasn't sure whether it would just start working if I restored those and restarted the aforementioned services. I tried joining the cluster manually, but that recognized the host as already being in a cluster, so I removed those files and tried again, but then it said "can't add existing node".
Now, what is the correct procedure for rejoining the cluster? I restored the SSH keys and network configuration. I have the corosync configuration and authkey. I probably messed up the first time around, but I wasn't sure whether it would just start working if I restored those and restarted the aforementioned services. I tried joining the cluster manually, but that recognized the host as already being in a cluster, so I removed those files and tried again, but then it said "can't add existing node".