Hi, I have a question: is there any possibility to do something like hot swap and, upon detecting a new disk by Proxmox, trigger a synchronization task to copy data there? So far, I've tested with a USB drive, but after removing and reattaching it, Proxmox requires a restart, which, as you can imagine, is not desirable!
[SOLVED] Sync How swap etc...
- Thread starter zuber
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As far as I remember this is a planned feature (external rotating disks). But no, nothing exists yet. But should be possible to script such a feature utilizing autofs/systemd-mounts, datastore maintainance mode and local sync jobs you can trigger via PBS API.
Problem is: even if you set maintenance mode to "offline" some process still keeps it busy (I suspect the proxmox-backup-proxy process). As a results you still cannot unmount it. Sure, you can remove the disk the hard way. But the proxmox-backup process will not recognize it and remount it. You will have to restart the whole server.
In essence: No, PBS is not capable to deal with removable external drives (no matter if we talk about USB drives or hot swap capable SATA/SAS backplanes. Its a pity as it make realizing the 3-2-1 backup rule pretty hard if not impossible (with 1 backup offsite and offline) with platters. Only way is to use tapes or a tape drive emulator.
Also have a look here:
https://bugzilla.proxmox.com/show_bug.cgi?id=3156
There're claim of people having scripts up and running, however I doubt that they work with the current PBS version.
I also found this one here which I understand could solve the problem:
https://lists.proxmox.com/pipermail/pbs-devel/2024-March/007965.html
In essence: No, PBS is not capable to deal with removable external drives (no matter if we talk about USB drives or hot swap capable SATA/SAS backplanes. Its a pity as it make realizing the 3-2-1 backup rule pretty hard if not impossible (with 1 backup offsite and offline) with platters. Only way is to use tapes or a tape drive emulator.
Also have a look here:
https://bugzilla.proxmox.com/show_bug.cgi?id=3156
There're claim of people having scripts up and running, however I doubt that they work with the current PBS version.
I also found this one here which I understand could solve the problem:
https://lists.proxmox.com/pipermail/pbs-devel/2024-March/007965.html
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Yeah, well. It shows what I already knew: proxmox-backup-proxy still keeps the datastore busy and doesn't release the
.lock file. Its probably much related to the patch mentioned in the mailing-list, I don't know....Unfortunately only the hard way with
However, it shouldn't be need to kill and then start the process again to force the release of the resource when you already set the maintenance mode yo "offline".
systemctl stop proxmox-backup-proxy. A systemctl restart proxmox-backup-proxy only send a -HUP signal which still does not make the process releasing the lock.However, it shouldn't be need to kill and then start the process again to force the release of the resource when you already set the maintenance mode yo "offline".
Well, it's still better than restarting the whole machine.
And many daemons handle things that way and require a full restart for major changes. See also nfsd, samba ...
Not really. You cannot compare those types of services, its comparing apples with oranges. Filesharing services as SAMBA and alike are not designed for being used with removable media (even though some still work even with those).
But backup services are usually explicitly designed to deal with removable media. Even PBS is capable of dealing with tapes, just not with anything else. This is not acceptable for a serious backup solution in my eyes.
But backup services are usually explicitly designed to deal with removable media. Even PBS is capable of dealing with tapes, just not with anything else. This is not acceptable for a serious backup solution in my eyes.