lvmlocal.conf not available when vdsm-tool config-lvm-filter run

[nirs]

/etc/lvm/lvmlocal.conf is installed by vdsm-tool configure --module lvm.
However vdsm-tool config-lvm-filter is run before the configuration phase,
and it run before since we must setup multipath blacklist before configuring
vdsm.

This means that when configuring lvm devices on ovirt < 4.5.1, the option
multipath_wwids_file = "" is not applied, and lvm may fail to add some
devices to the devices file.

• We don't have a way to fix this in 4.5.1.

• When upgrading 4.5.1 to 4.5.2 the configuration is already available, no issue.

• When upgrading from version < 4.5.1 to version >= 4.5.2, we can fix the issue by forcing this option in vdsm-tool --config:

  vgimportdevices --config 'devices { use_devicesfile = 1 multipath_wwids_file = "" filter = ["a|.*|"] }' {vg-name}
  

Another way to fix this is to eliminate vdsm-tool config-lvm-filter and move the
configuration step to vdsm-tool configure --module lvm. But this requires enforcing
order of configurators in vdsm-tool (e.g. lvm runs before multipath), or merging the
storage configurators to one module (storage?).

The ideal order:

• Install lvm configuration
• Configure lvm devices (or filter)
• Configure multipath blacklist
• Configure multipath
• Reload multiapth

Related bugs:

• https://bugzilla.redhat.com/2095588