Hello,
I am trying to use LVM2 with externally connected ip_srp storage hardware on a diskless booted node running RHEL 7 and when I attempt to create a logical volume or a snapshot under normal conditions I get the following error:
[root@ss53 ~]# lvcreate --snapshot --size 10G --name testsnap vg_local/lv_local-1 -v
Using default stripesize 64.00 KiB.
Setting chunksize to 4.00 KiB.
Archiving volume group "vg_local" metadata (seqno 194).
Creating logical volume testsnap
Creating volume group backup "/etc/lvm/backup/vg_local" (seqno 195).
activation/volume_list configuration setting not defined: Checking only host tags for vg_local/testsnap.
Creating vg_local-testsnap
Loading vg_local-testsnap table (253:57)
Resuming vg_local-testsnap (253:57)
/dev/vg_local/testsnap: not found: device not cleared
Aborting. Failed to wipe snapshot exception store.
Removing vg_local-testsnap (253:57)
Creating volume group backup "/etc/lvm/backup/vg_local" (seqno 196).
(When I do the same operation with increased verbosity it shows that there is no device file being created in /dev/vg_local to support the new LV.)
The interesting thing is that when I run the command with -vvv at the console (via conman) it works!
I don’t know whether there is a problem with lvm, udev or dmsetup that is causing the problem but it definitely seems like a timing issue. (If I do that same thing on a disk full system I don’t have any problems.)
Has anyone encounter this? Is there a work-around?
Thanks in advance.
====
Joe Mervini
Sandia National Laboratories
High Performance Computing
505.844.6770
jamervi@sandia.gov
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