Please merge mdadm 3.2.3-2 from Debian unstable (main) (multiple regressions)

[Timo Aaltonen]

Looking at the list of fixes upgrading mdadm from 3.2.2 to 3.2.3 shows some severe regressions were fixed.

mdadm: re-add fails (regression in mdadm-3.2.2-1ubuntu1)
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=651880

mdadm: segmentation fault when converting raid10 to raid0
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=645563

mdadm-raid does not assemble mds on multipath devices
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=641584

This ticket was originally about only one of them:

/etc/cron.daily/mdadm fails if mdadm monitor daemon is already running
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=641886

Reproducing:

1. Install Ubuntu 12.04 with md raid.

My system has:

$ cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md1 : active raid1 sdb2[1] sda2[0]
      522048 blocks [2/2] [UU]

md0 : active raid1 sdb1[1] sda1[0]
      10490304 blocks [2/2] [UU]

md2 : active raid1 sdc1[0] sdd1[1]
      805305143 blocks super 1.2 [2/2] [UU]

unused devices: <none>

2. Try running this mdadm command, observe unexpected results:

# mdadm --monitor --scan --oneshot
mdadm: Only one autorebuild process allowed in scan mode, aborting

3. Also cron will send mail:

/etc/cron.daily/mdadm:
mdadm: Only one autorebuild process allowed in scan mode, aborting
run-parts: /etc/cron.daily/mdadm exited with return code 1

Because when you install the mdadm package this crontab file is created:

$ dpkg -S /etc/cron.daily/mdadm
mdadm: /etc/cron.daily/mdadm

4. Stop any mdadm processes (but only for testing, it is unacceptable to turn off mdadm monitoring.)

# service mdadm stop

5. Try running, observe expected results:
# mdadm --monitor --scan --oneshot
(no output)

This issue was fixed in Debian, please Debian Import this version:

Format: 1.8
Date: Wed, 18 Jan 2012 22:33:01 +0400
Source: mdadm
Binary: mdadm mdadm-udeb
Architecture: source i386
Version: 3.2.3-2
Distribution: unstable
Urgency: low
Maintainer: Debian mdadm maintainers <email address hidden>
Changed-By: Michael Tokarev <email address hidden>
Description:
 mdadm - tool to administer Linux MD arrays (software RAID)
 mdadm-udeb - tool to administer Linux MD arrays (software RAID) (udeb)
Closes: 607375 628667 633880 637068 641584 641886 641972 645563 650630 651737 651880 652547 655212
Changes:
 mdadm (3.2.3-2) unstable; urgency=low
 .
   [ Michael Tokarev ]
   * new upstream bugfix/stable version, with lots of fixes all over.
     Closes: #641886, #628667, #645563, #651880, #607375, #633880
   * update Neil's email (Closes: #650630)
   * update mdadd.sh to version 1.52 (Closes: #655212)
   * fixed a typo (RAID6 vs RAID10) in FAQ (Closes: #637068)
   * declare ordering dependency for multipath-tools-boot in
     mdadm-raid init script (Closes: #641584)
     While at it, remove mention of devfsd
   * added Slovak (sk.po) po-debconf translation from Slavko <email address hidden>
     (Closes: #641972)
   * set nice value of the check/resync thread too, together with I/O
     scheduling class, based on patch by Sergey B Kirpichev (Closes: #652547)
   * small changes for debian/checkarray
   * (internal) move files from contrib/* topgit branches into debian directory
   * remove dh_testroot from clean target
   * add myself to uploaders
 .
   [ Peter Eisentraut ]
   * Added support for "status" action to mdadm init script (Closes: #651737)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[nutznboltz (nutznboltz-deactivatedaccount)]

Title was updated based on advice in:
https://wiki.ubuntu.com/UbuntuDevelopment/NewPackages

[nutznboltz (nutznboltz-deactivatedaccount)]

PPA of mdadm 3.2.3-2 for Ubuntu 12.04
https://launchpad.net/~nutznboltz/+archive/mdadm-3.2.3-2

[nutznboltz (nutznboltz-deactivatedaccount)]

I have a server running with the 3.2.3-2 from my PPA now.

$ lsb_release -ds
Ubuntu precise (development branch)
$ uname -srvi
Linux 3.2.0-14-generic #23-Ubuntu SMP Fri Feb 3 23:17:59 UTC 2012 x86_64

$ ps ax | grep mdadm | grep -v grep
15618 ? Ss 0:00 /sbin/mdadm --monitor --pid-file /var/run/mdadm/monitor.pid --daemonise --scan --syslog

$ sudo mdadm --monitor --scan --oneshot
$ echo $?
0

[nutznboltz (nutznboltz-deactivatedaccount)]

Successful reboot of a second system, this one has ext2 /boot on RAID-1 md0 and LVM on RAID-0 md1

$ cat /proc/mdstat
Personalities : [raid0] [raid1]
md1 : active raid0 sda2[0] sdb2[1]
      1953130496 blocks super 1.2 512k chunks

md0 : active raid1 sda1[0] sdb1[1]
      194548 blocks super 1.2 [2/2] [UU]

[ 3.260937] mdadm: sending ioctl 800c0910 to a partition!
[ 3.260990] mdadm: sending ioctl 800c0910 to a partition!
[ 3.261055] mdadm: sending ioctl 1261 to a partition!
[ 3.261107] mdadm: sending ioctl 1261 to a partition!
[ 3.261720] mdadm: sending ioctl 800c0910 to a partition!
[ 3.261766] mdadm: sending ioctl 800c0910 to a partition!
[ 3.266310] md: md0 stopped.
[ 3.293294] md: bind<sdb1>
[ 3.293532] md: bind<sda1>
[ 3.294449] bio: create slab <bio-1> at 1
[ 3.294569] md/raid1:md0: active with 2 out of 2 mirrors
[ 3.294628] md0: detected capacity change from 0 to 199217152
[ 3.295273] md0: unknown partition table
[ 3.299025] md: md1 stopped.
[ 3.304593] md: bind<sdb2>
[ 3.304810] md: bind<sda2>
[ 3.305961] md/raid0:md1: md_size is 3906260992 sectors.
[ 3.306014] md: RAID0 configuration for md1 - 1 zone
[ 3.306067] md: zone0=[sda2/sdb2]
[ 3.306232] zone-offset= 0KB, device-offset= 0KB, size=1953130496KB
[ 3.306300]
[ 3.306356] md1: detected capacity change from 0 to 2000005627904
[ 3.334425] md1: unknown partition table

[Launchpad Janitor (janitor)]

This bug was fixed in the package mdadm - 3.2.3-2ubuntu1

---------------
mdadm (3.2.3-2ubuntu1) precise; urgency=low

  * Merge from Debian testing. (LP: #920324) Remaining changes:
    - Call checks in local-premount to avoid race condition with udev
      and opening a degraded array.
    - d/initramfs/mdadm-functions: Record in /run when boot-degraded
      question has been asked so that it is only asked once
    - pass --test to mdadm to enable result codes for degraded arrays.
    - Build udeb with -O2 on ppc64, working around a link error.
    - debian/control: we need udev and util-linux in the right version. We
      also remove the build dependency from quilt and docbook-to-man as both
      are not used in Ubuntus mdadm.
    - debian/initramfs/hook: kept the Ubuntus version for handling the absence
      of active raid arrays in <initramfs>/etc/mdadm/mdadm.conf
    - debian/initramfs/script.local-top.DEBIAN, debian/mdadm-startall,
      debian/mdadm.raid.DEBIAN: removed. udev does its job now instead.
    - debian/mdadm-startall.sgml, debian/mdadm-startall.8: documentation of
      unused startall script
    - debian/mdadm.config, debian/mdadm.postinst - let udev do the handling
      instead. Resolved merge conflict by keeping Ubuntu's version.
    - debian/mdadm.postinst, debian/mdadm.config, initramfs/init-premount:
      boot-degraded enablement; maintain udev starting of RAID devices;
      init-premount hook script for the initramfs, to provide information at
      boot
    - debian/mkconf.in is the older mkconf. Kept the Ubuntu version.
    - debian/rules: Kept Ubuntus version for installing apport hooks, not
      installing un-used startall script and for adding a udev rule
      corresponding to mdadm.
    - debian/install-rc, check.d/_numbers, check.d/root_on_raid: Ubuntu partman
      installer changes
    - debian/presubj: Dropped this unused bug reporting file. Instead use
      source_mdadm.py act as an apport hook for bug handling.
    - rename debian/mdadm.vol_id.udev to debian/mdadm.mdadm-blkid.udev so that
      the rules file ends up with a more reasonable name
    - d/p/debian-changes-3.1.4-1+8efb9d1ubuntu4: mdadm udev rule
      incrementally adds mdadm member when detected. Starting such an
      array in degraded mode is possible by mdadm -IRs. Using mdadm
      -ARs without stopping the array first does nothing when no
      mdarray-unassociated device is available. Using mdadm -IRs to
      start a previously partially assembled array through incremental
      mode. Keeping the mdadm -ARs for assembling arrays which were for
      some reason not assembled through incremental mode (i.e through
      mdadm's udev rule).

mdadm (3.2.3-2) unstable; urgency=low

  [ Michael Tokarev ]
  * new upstream bugfix/stable version, with lots of fixes all over.
    Closes: #641886, #628667, #645563, #651880, #607375, #633880
  * update Neil's email (Closes: #650630)
  * update mdadd.sh to version 1.52 (Closes: #655212)
  * fixed a typo (RAID6 vs RAID10) in FAQ (Closes: #637068)
  * declare ordering dependency for multipath-tools-boot in
    mdadm-raid init script (Closes: #641584)
    While at it, remove mention of de...

[John Center (john-center)]

I just installed this package & it appears mdmon is missing. -John

[nutznboltz (nutznboltz-deactivatedaccount)]

Eh? Speak up boy, no one's listening to this old bug report, sonny.

________________________________
 From: John Center <email address hidden>
To: <email address hidden>
Sent: Friday, March 16, 2012 2:58 PM
Subject: [Bug 920324] Re: Please merge mdadm 3.2.3-2 from Debian unstable (main) (multiple regressions)

I just installed this package & it appears mdmon is missing.  -John

--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/920324

Title:
  Please merge mdadm 3.2.3-2 from Debian unstable (main) (multiple
  regressions)

Status in “mdadm” package in Ubuntu:
  Fix Released
Status in “mdadm” package in Debian:
  Fix Released

Bug description:
  Looking at the list of fixes upgrading mdadm from 3.2.2 to 3.2.3 shows
  some severe regressions were fixed.

  mdadm: re-add fails (regression in mdadm-3.2.2-1ubuntu1)
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=651880

  mdadm: segmentation fault when converting raid10 to raid0
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=645563

  mdadm-raid does not assemble mds on multipath devices
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=641584

  This ticket was originally about only one of them:

  /etc/cron.daily/mdadm fails if mdadm monitor daemon is already running
  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=641886

  Reproducing:

  1. Install Ubuntu 12.04 with md raid.

  My system has:

  $ cat /proc/mdstat
  Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
  md1 : active raid1 sdb2[1] sda2[0]
        522048 blocks [2/2] [UU]

  md0 : active raid1 sdb1[1] sda1[0]
        10490304 blocks [2/2] [UU]

  md2 : active raid1 sdc1[0] sdd1[1]
        805305143 blocks super 1.2 [2/2] [UU]

  unused devices: <none>

  2. Try running this mdadm command, observe unexpected results:

  # mdadm --monitor --scan --oneshot
  mdadm: Only one autorebuild process allowed in scan mode, aborting

  3. Also cron will send mail:

  /etc/cron.daily/mdadm:
  mdadm: Only one autorebuild process allowed in scan mode, aborting
  run-parts: /etc/cron.daily/mdadm exited with return code 1

  Because when you install the mdadm package this crontab file is
  created:

  $ dpkg -S /etc/cron.daily/mdadm
  mdadm: /etc/cron.daily/mdadm

  4. Stop any mdadm processes (but only for testing, it is unacceptable
  to turn off mdadm monitoring.)

  # service mdadm stop

  5. Try running, observe expected results:
  # mdadm --monitor --scan --oneshot
  (no output)

  This issue was fixed in Debian, please Debian Import this version:

  Format: 1.8
  Date: Wed, 18 Jan 2012 22:33:01 +0400
  Source: mdadm
  Binary: mdadm mdadm-udeb
  Architecture: source i386
  Version: 3.2.3-2
  Distribution: unstable
  Urgency: low
  Maintainer: Debian mdadm maintainers <email address hidden>
  Changed-By: Michael Tokarev <email address hidden>
  Description:
   mdadm      - tool to administer Linux MD arrays (software RAID)
   mdadm-udeb - tool to administer Linux MD arrays (software RAID) (udeb)
  Closes: 607375 628667 633880 637068 641584 641886 641972 645563 650630 651737 651880 652547 655212
  Changes:
   mdad...

[Clint Byrum (clint-fewbar)]

John, you're right, mdmon is not shipped. I don't think it ever was actually. So I opened this bug report:

https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/957494

Please track it there.

[nutznboltz (nutznboltz-deactivatedaccount)]

OMG! Service with a :)

[John Center (john-center)]

mdmon is included with the Oneiric mdadm package. I'm testing Precise beta1 via the live cd & saw my array coming up readonly after installing it. It took me awhile to figure out what was wrong. (Google is your friend, sometimes... ;-))

Sonny? I haven't been called that since the '60's. :-)