Does boom support multi-volume snapshots?
Environment
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Boom
Issue
- Does boom entry support
snapshot
for multiple logical volumes? - Can we take boom snapshots of /var if /var is
not under
root and then later rollback if needed?
Root Cause
- Boom has the functionality to take snapshots of
single root
LV. At this moment, it doesn't have an option to create boom entry for multiple logical volumes. - When /var or /usr is separate or other logical volumes which are required to have snapshot together then one cannot create a single boom entry to boot from that snapshot.
- Boom works only when all the file systems are
under
root. Multi-volume snapshots
are a boom feature that will be available in the future when the work forsnapshot-manager
will be merged intoRed Hat Enterprise Linux
but there is no known ETA at this point in time. BZ#1794460 is already in the open state for multi-volume snapshots.
Diagnostic Steps
- Logical volumes can be verified using
#lsblk
or#lvs
command:
[root@vm254-46 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 8G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 7G 0 part
├─rhel-root 253:0 0 6.2G 0 lvm /
└─rhel-swap 253:1 0 820M 0 lvm [SWAP]
sr0 11:0 1 1024M 0 rom
[root@vm254-46 ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root rhel -wi-ao---- <6.20g
swap rhel -wi-ao---- 820.00m
[root@vm254-46 ~]#
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