Am 11.01.24 um 16:03 schrieb Friedrich Weber: > Activating an LV creates a device-mapper device. In a cluster with a > shared LVM VG (e.g. on top of iSCSI) where an LV is active on nodes 1 > and 2, deleting the LV on node 1 will not clean up the device-mapper > device on node 2. If an LV with the same name is recreated later, the > leftover device-mapper device will cause activation of that LV on node > 2 to fail with: > >> device-mapper: create ioctl on [...] failed: Device or resource busy > > By default, LVM autoactivates all discovered LVs after boot, thus > creating device-mapper device for all discovered LVs. As a result, > certain combinations of guest removal (and thus LV removals) and node > reboots can cause guest creation or VM live migration (which both > entail LV activation) to fail with the above error message, see [1]. > > To avoid this issue in the future, adjust the LVM plugin to create new > LVs with the "activation skip" flag. LVs with that flag are not > activated unless `-K` is passed to the activation command. Consequently, > new LVs will not be autoactivated after boot anymore, and removing LVs > will not leave behind device-mapper devices on other nodes anymore. > > The LVM plugin is still able to activate LVs, as it already passes > `-K` to all activation commands. > > Note that the flag is only set for newly created LVs, so LVs created > before this patch can still trigger #4997. To avoid this, users can > manually set the "activation skip" flag on existing LVs. > > [1] https://bugzilla.proxmox.com/show_bug.cgi?id=4997 > > Suggested-by: Fabian Grünbichler <f.gruenbich...@proxmox.com> > Signed-off-by: Friedrich Weber <f.we...@proxmox.com>
Reviewed-by: Fiona Ebner <f.eb...@proxmox.com> > --- > > Notes: > Should only be applied close to the next major release, see cover > letter. > > src/PVE/Storage/LVMPlugin.pm | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
