I've got a couple of servers running in a 2 node master/slave cluster using pacemaker(corosync)/drbd. Like other servers, I've got them configured to backup to a local BackupPC server as well as a remote (VPN over T1) BackupPC server (rsync over ssh for both). However, with the cluster, only the master node has the partition mounted that is to be backed up, so the backups for the slave node will always fail. This is ok, but maybe there is a better way to do this? Anyway, to get the backups started I brought the remote backup server local to take a full backup (because ~300GB). After a fail over of the master node to the slave node the slave becomes the new master, gets the partition mounted and thus has something to backup. The local backups work without a problem on the new master. The remote backups act like they are working on the new master, but never actually finish. I've let them go more than a week, which is well past the default client timeout which has actually never taken effect with these two boxes. This erroneous behavior persists when failing back over to the original master. The only way I get the remote backups going again is to bring the remote server local for a full backup. Any subsequent remote backups work after this until a fail over of the cluster occurs. Remote backups for other servers in the past have been performed without these issues. Any ideas as to why there are issues with the remote backup in this setup? And what I might try to get the backups running again on the master node after a fail over without having to bring the remote server local every time?
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