This seems like such an innocent question. I have a firewall system controlling tunnels all over the USA. It's an HA setup with two nodes. And I use Gluster to keep all the configs and logs replicated.
It's an active/standby system and it's been in place for something like 3 years. The standby had a catastrophic hardware failure a while ago and it looks like it needs a new motherboard. We have people rebuilding the hardware. The standby hard drive seems fine. But now the primary system repeatedly stalls its I/Os, sometimes to directories that aren't even part of Glusterfs. And the problem is getting worse day by day, hour by hour. Before they barbecue me, how do I tell Gluster to temporarily take the failed node offline while the motherboard is replaced, then put it back in service and copy everything over to it? I don't want to completely remove the brick because when the hardware is repaired and we start it up again, I want it to join back up and have everything replicate over to it. So for now - what can I do on the surviving node to tell it not to try to replicate until further notice, and then how to I tell it to go back to normal when I get the standby system back online? Thanks - Greg Scott
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