Commit cec72c071b ("systemd/mdadm-last-resort: add Conflicts to .service file.")
added a 'Conflicts' directive to the mdadm-last-resort@.service file in
the hope that this would make sure the service didn't run after the device
was active, even if the timer managed to get started, which is possible in
race conditions.
This seemed to work is testing, but it isn't clear why, and it is known
to cause problems.
If systemd happens to know that the mentioned device is a dependency of a
mount point, the Conflicts can unmount that mountpoint, which is certainly
not wanted.
So remove the "Conflicts" and instead use
ConditionPathExists=!/sys/devices/virtual/block/%i/md/sync_action
The "sync_action" file exists for any array which requires last-resort
handling, and only appears when the array is activated. So it is safe
to rely on it to determine if the last-resort is really needed.
Fixes: cec72c071b ("systemd/mdadm-last-resort: add Conflicts to .service file.")
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
This reverts commit 5b2846684e.
This was a red herring and shouldn't have been applied in the first
place.
Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>
systemctl doesn't interpret mdadm-grow-continue@.service
correctly due to the wrong argument provided in [service],
it should be corrected %I as %i. Otherwise, if the service
cannot start by systemctl and the reshap progress would be
stuck all time when grows array from raid1 to raid5.
reproduce steps:
./mdadm -CR /dev/md0 -l1 -b internal -n2 /dev/loop[0-1]
./mdadm --grow /dev/md0 -l5 -n3 -a /dev/loop2
Signed-off-by: Zhilong Liu <zlliu@suse.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>
It seems that having the Conflicts in the .timer file is not sufficient.
Sometimes it works, but if the timer gets requested after the conflicting
block device appears (or was it "before" ...) the timer is not aborted.
Having the Conflicts in both files seems to work reliably.
URL: https://bugzilla.suse.com/show_bug.cgi?id=853944
Signed-off-by: NeilBrown <neilb@suse.com>
Every place where the paths for mdadm or mdmon is explicit,
it should use the BINDIR setting, not "/sbin/".
Reported-by: member graysky <graysky@archlinux.us> (https://bugs.archlinux.org/task/37330)
Signed-off-by: NeilBrown <neilb@suse.de>
If "--assemble" or "--incremental" is started by udev, then
monitoring the reshape in the background won't work.
So try asking systemd to start a grow-continue.
If that fails, just do it the old way.
Signed-off-by: NeilBrown <neilb@suse.de>
1/ Add systemd shutdown script to ensure DDF and IMSM are
clean before we actually shutdown
2/ Get udev to tell systemd to run the mdmon@mdXXX.service
units when a member array appears.
If we boot off a member array (with dracut at least),
the mdmon started in the initramfs will lose track of
/sys etc, so we need to restart it.
systemd will try to forget about it too (but not actually
kill it because we said not to do this).
Having udev tell it to start it will allow a new mdmon to
run which can see /sys, and systemd will know about it.
3/ Always use --offroot and --takeover when starting mdmon with
systemd
--offroot is needed else shutdown will hang.
--takeover is needed incase an mdmon was started earlier
(e.g. in initramfs).
Neither hurt if they aren't actually needed.
Signed-off-by: NeilBrown <neilb@suse.de>
Mdadm does not wait enough time when mdmon is started by systemd.
It causes various problems with behaviour of a RAID volume with external metadata.
For example: mdmon does not update a value of checkpoint during migration
and second RAID5 volume is read-only after reboot done during
container reshape (both problems occur with IMSM matadata).
If a type of process start-up is changed to 'forking', systemctl will
wait until mdmon (parent) process exits after calling fork.
This way mdmon will always be fully initialized after start_mdmon
and these problems will not occur.
In this case it is recommended to add a path to PIDFile, so that systemd
does not have to guess a PID of the mdmon process.
Signed-off-by: Pawel Baldysiak <pawel.baldysiak@intel.com>
Reviewed-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Reviewed-by: Lukasz Dorau <lukasz.dorau@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Redirecting output to /dev/null is unnecessary and hides any error
messages there might be. So leave as defaults which are none,
journal, inherit.
Signed-off-by: NeilBrown <neilb@suse.de>
As mdmon doesn't inherit environment from mdadm when it is started
by system, it cannot inherit IMSM_NO_PLATFORM.
But if an imsm array as assembled then mdmon really should handle it
whether there is a platform present or not.
So always set this var.
Signed-off-by: NeilBrown <neilb@suse.de>
When the md device actually appears we want to stop the timer and not
bother with the mdadm-last-resort@.server. In particular, running
that causes confusing messages and is in general best avoided.
Fortuantely this can simply be achieved with a Conflicts= line
Signed-off-by: NeilBrown <neilb@suse.de>
This systemd unit file runs mdadm in --monitor mode.
It is started by a SYSTEMD_WANTS signal from udev whenever
an md array is started that would benefit from mdadm --monitor.
Commandline arguments can be provided by a script
/usr/lib/systemd/scripts/mdadm_env.sh
which should write an
MDADM_MONITOR_ARGS=....
line to /run/sysconfig/mdadm
A script to extra args from SUSE's /etc/sysconfig/mdadm file
is provided.
If no mdadm_env.sh is provided, then args are "--scan" which
requires "mail" or "program" to be set in /etc/mdadm.conf.
I believe this is suitable for Fedora.
Signed-off-by: NeilBrown <neilb@suse.de>
Normally "mdadm -I" will not start an array if it has reason to
expect further devices.
This means that if a device is removed while the host is shut down,
"mdadm -I" will never start the device.
If the array is know to the host, it make sense to start the array
anyway after a reasonable timeout.
This patch adds systemd/udev infrastructure so that 30 seconds after
a known array first becomes able to be assembled as a degraded array,
the array will be assembled even if more devices are still expected.
Signed-off-by: NeilBrown <neilb@suse.de>
While not strictly necessary for systemd, it is cleaner to avoid
forking when running from a management daemon. So add a --foreground
option to mdmon.
Signed-off-by: NeilBrown <neilb@suse.de>
If launching mdmon via systemctl fails, we fall back to the old method
of fork/exec. This allows for having mdmon launched via systemctl
which avoids problems with it getting killed by systemd due to it
ending up in the parent's cgroup (udev).
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown
Jes Sorensen
Zhilong Liu
NeilBrown
Pawel Baldysiak
Jes Sorensen