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Bug https://bugzilla.redhat.com/show_bug.cgi?id=843587 is handled better
now - the hang does not occur anymore. There are still error messages
issued though during shutdown if someone stops lvm2-lvmetad.service
manually that lvm2-monitor.service depends on (even during shutdown).
These errors are correct though and will point to incorrect
configuration (still having use_lvmetad=1 in lvm.conf and stopping
lvm2-lvmetad.service manually).
The workaround to prevent the hang is not needed now. So the
'--config "global{use_lvmetad=0}"' is now removed from the
lvm2-monitor.service's ExecStop line.
When clustered VG is available in the system but we don't have
clustering set up for whatever reason, the lvm2-monitor scripts should
not fail completely just because these clustered VGs are skipped during
vgs/vgchange calls in lvm2-monitor initscript/systemd unit.
Fix previous commit 360c569ce8.
Remove only fedora-storage-init/fedora-storage-init-late.service, but
not lvm2-activation.service.
fedora-storage-init.service fedora-storage-init-late.service
Don't use lvmetad in lvm2-monitor.service ExecStop to avoid a systemd issue.
- a systemd design issue while processing dependencies
with socket-based activation that ends up with a hang
- https://bugzilla.redhat.com/show_bug.cgi?id=843587
(also tracker bug https://bugzilla.redhat.com/show_bug.cgi?id=871527)
- not using lvmetad in this case is just a workaround, once the bug
above is resolved, we should enable the lvmetad in that specific case
Remove dependency on fedora-storage-init.service in lvm2 systemd units.
- fedora-storage-init.service and fedora-storage-init-late.service is
going to be separated into respective units that belong to each block
device subsystem:
- mpath + mdraid activated via udev solely
- dmraid with its own dmraid-activation.service unit
- lvm2 with the lvm2-activation-generator to generate the
activation units runtime if lvmetad disabled
(global/use_lvmetad=0 set in lvm.conf) and activation done
via udev+lvmetad if lvmetad enabled (global/use_lvmetad=1 set
in lvm.conf)
Depend on lvm2-lvmetad.socket in lvm2-monitor.service systemd unit.
- as lvm2-monitor uses lvmetad if lvmetad is enabled
lvm2-activation-early.service (generated by activation generator) should
be ordered before cryptsetup.target.
lvm2-monitor.service should be ordered after lvm2-activation.service,
if used. The lvm2-activation.service will replace fedora-storage-init.service
and fedora-storage-init-late.service in the end, but let's have it
prepared now.
Monitoring is handled using "vgchange --monitor" call. Ensure that lvmetad is up
and running at the time of this call to prevent any fallback to direct scan
within the vgchange. The same applies for shutdown sequence but the other way
round - switch monitoring off and lvmetad afterwards.
