Bug#652548: mdadm-raid startup script (and hence postinst) spurious failure

[Ian Jackson]

Package: mdadm
Version: 3.1.4-1+8efb9d1
Tags: patch

I found that during my lenny->squeeze upgrade, I was not able to
configure mdadm.  See the transcript below.

The problem seems to be that:
 * My md devices were all already set up
 * Therefore madm --assemble --auto does nothing and exits 2
 * Therefore /etc/init.d/mdadm-raid also exits 2

I was able to fix this with the patch below.

Thanks,
Ian.


# dpkg --configure mdadm
Setting up mdadm (3.1.4-1+8efb9d1) ...
Generating array device nodes... done.
update-initramfs: deferring update (trigger activated)
Starting MD monitoring service: mdadm --monitor.
invoke-rc.d: initscript mdadm-raid, action "start" failed.
dpkg: error processing mdadm (--configure):
 subprocess installed post-installation script returned error exit status 2
Processing triggers for initramfs-tools ...
update-initramfs: Generating /boot/initrd.img-2.6.32-5-686-bigmem
W: Busybox is required for successful boot!
Errors were encountered while processing:
 mdadm
# /etc/init.d/mdadm-raid stop
mdadm: failed to stop array /dev/md125: Device or resource busy
Perhaps a running process, mounted filesystem or active volume group?
mdadm: failed to stop array /dev/md126: Device or resource busy
Perhaps a running process, mounted filesystem or active volume group?
mdadm: failed to stop array /dev/md127: Device or resource busy
Perhaps a running process, mounted filesystem or active volume group?
# /etc/init.d/mdadm-raid start
# /etc/init.d/mdadm-raid stop
mdadm: failed to stop array /dev/md125: Device or resource busy
Perhaps a running process, mounted filesystem or active volume group?
mdadm: failed to stop array /dev/md126: Device or resource busy
Perhaps a running process, mounted filesystem or active volume group?
mdadm: failed to stop array /dev/md127: Device or resource busy
Perhaps a running process, mounted filesystem or active volume group?
# /etc/init.d/mdadm-raid start
# invoke-rc.d mdadm-raid start
invoke-rc.d: initscript mdadm-raid, action "start" failed.
# /etc/init.d/mdadm-raid start
# echo $?
2
#         mdadm --assemble --no-degraded --auto=md --scan
# echo $?
2



--- /etc/init.d/mdadm-raid~	2010-04-11 20:19:51.000000000 +0100
+++ /etc/init.d/mdadm-raid	2011-12-18 13:41:39.000000000 +0000
@@ -90,7 +90,7 @@
 
 case "${1:-}" in
   start)
-	mdadm --assemble --no-degraded --auto=md --scan
+	mdadm --assemble --no-degraded --auto=md --scan || test $? = 2
     ;;
 
   stop)