Tks. I'll do it. Worst case: I'll have to create a new volume and move
files from the old bricks to it. The safety is what I like most in Gluster.
The 'funny' thing is that a replica server is planned but not yet
operative :(
Il 17/01/2022 18:24, Strahil Nikolov ha scritto:
Verify that you can install the same version of gluster.
If not, plan to update to a version that is available to both old and
new servers' OS.
Once you migrate (check all release notes in advance) to a common
version, you can do something like this:
- Install the gluster software on the new host
- Setup the firewall to match the old server
- Stop the gluster volumes and any geo-rep sessions
- Shutdown glusterd service
- Umount the bricks
- Disable LVM LVs/VGs that host your bricks (if you share the same VG
with other software, you will have to use vgsplit)
- Remove the multipath devices (multipath -f)
- Remove the block devices that are part of those multipath devices
- Backup /etc/glusterfs
- Backup /var/lib/glusterd
- Unmap the LUNs
- Present the LUNs on the new host
- Verify that the multipath devices are there
- Rescan the LVM stack (pvscan --cache, vgscan lvscan)
- Activate the VGs/LVs
- Mount the bricks and ensure mounting on boot (autofs, systemd's
'.mount/.automount' units, fstab)
- restore /etc/glusterfs & /var/lib/glusterd
- Start the glusterd service
- Start the volumes
- Mount via FUSE to verify the situation
- Start the geo-replications (if any)
Note, if you use VDO - disable the volume on the old system and backup
the config (/etc/vdoconf.yml) -> restore on the new host.
Check your tuned profile and if needed transfer the configuration file
on the new system and activate it.
I might have missed something (like custom entries in /etc/hosts) , so
do a short test on test system in advance.
Edit: You didn't mention your FS type, so I assume XFS .
Best Regards,
Strahil Nikolov
On Mon, Jan 17, 2022 at 13:15, Diego Zuccato
<diego.zuccato@xxxxxxxx> wrote:
Hello all.
I have a Gluster volume that I'd need to move to a different server.
The volume is 4x10TB bricks accessed via FC (different LUNs) on an old
CX3-80.
I have no extra space to create a copy of all the data, so I'd need to
hide the LUNs from the old server and make 'em visible to the new
("move
the disks"), w/o copying data.
Can I just do something like this?
- stop volume
- umount bricks
- copy volume state files to new server (which ones?)
- map LUNs to new server
- mount bricks on new server (maintaining the same path they had on old
server)
- start glusterd on new server
- start volume
Tks!
--
Diego Zuccato
DIFA - Dip. di Fisica e Astronomia
Servizi Informatici
Alma Mater Studiorum - Università di Bologna
V.le Berti-Pichat 6/2 - 40127 Bologna - Italy
tel.: +39 051 20 95786
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--
Diego Zuccato
DIFA - Dip. di Fisica e Astronomia
Servizi Informatici
Alma Mater Studiorum - Università di Bologna
V.le Berti-Pichat 6/2 - 40127 Bologna - Italy
tel.: +39 051 20 95786
________
Community Meeting Calendar:
Schedule -
Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
Bridge: https://meet.google.com/cpu-eiue-hvk
Gluster-users mailing list
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