configuring open-iscsi crash computer

[Rolf Rander Næss]

Binary package hint: open-iscsi

Trying to upgrade ubuntu from 10.04.2 to 10.10 on a machine with iSCSI-root.

When dpkg reconfigures open-iscsi, it logs out of all iscsi-targets, root disapears and the machine hang. (I can see on the iSCSI-server that there are no initiators logged in to this target any longer)

Debian has solved this by letting the open-iscsi init.d script check if initramfs is configured for iscsi, and if true, not logging out.

http://osdir.com/ml/debian-bugs-dist/2010-02/msg00064.html

I tried patching the init.d-script in ubuntu the same way, but it didn't help. (This is as far as my understanding of iSCSI and dpkg trigger scripts goes...)

Last messages before crash:

$ sudo dpkg --debug=20133 --configure open-iscsi
[sudo] password for ladmin:
Setting up open-iscsi (2.0.871-0ubuntu5) ...
D020000: trigproc_activate_packageprocessing pkg=open-iscsi
D000002: fork/exec /var/lib/dpkg/info/open-iscsi.postinst ( configure 2.0.871-0ubuntu4 )
update-initramfs: deferring update (trigger activated)
update-rc.d: warning: open-iscsi stop runlevel arguments (0 1 6) do not match LSB Default-Stop values (0 6)
 * Starting iSCSI initiator service iscsid [ OK ]
ln: target `/lib/init/rw/sendsigs.omit.d/' is not a directory: No such file or directory
 * Setting up iSCSI targets

This might be related to several other bugs:

   677333 open-iscsi: reconnecting to targets fails with kernel >2.6.32 due to sysfs changes
   669142 if-up.d/if-down.d scripts restart iSCSI inappropriately
   656722 install to iscsi hdd not possible
   639618 Network drivers are loaded too late on netboot (tested with iSCSI)
   638976 open-iscsi update prevents shutdown on iscsiboot

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: open-iscsi 2.0.871-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-26.48-generic 2.6.32.24+drm33.11
Uname: Linux 2.6.32-26-generic x86_64
Architecture: amd64
Date: Fri Mar 25 16:52:33 2011
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: open-iscsi

[Rolf Rander Næss (rolf-ness)]

Some more research:

This seems similar to:
http://<email address hidden>/msg05572.html

And in fact, as I should have noticed from the dump, it is not related to iscsi shutting down, but the daemon starting up without being able to re-connect to the existing targets. This means it will also crash if I start the iscsi daemon independent of any upgrade (confirmed, when doing /etc/init.d/open-iscsi start, I loose root).

Apparently fixed in a later version...

[Rolf Rander Næss (rolf-ness)]

Hm, probably a duplicate of
https://bugs.launchpad.net/ubuntu/+source/open-iscsi/+bug/677333