[Linux-HA] HELP - debugging a hanging domU boot?
petri.asikainen at sataedu.fi
Thu Oct 28 06:54:50 MDT 2010
Have you tried to mount/fsck filesystem xvd from dom0?
For me this look like filesystem related issue. It's better to convert domu /boot partions to ext2 to prevent journal recovery related issues.
Miles Fidelman <mfidelman at meetinghouse.net> kirjoitti 28.10.2010 kello 15.45:
> Hi Folks,
> I'm running (what's supposed to be) a 2-node high-availability
> configuration consisting of:
> - Xen3.x
> - Debian Stable Dom0 on each node
> - DRBD
> - Pacemaker
> - several Debian Stable DomUs
> One of my DomUs seems to have crashed and is stubbornly refusing to
> boot. On either node, it comes part way up and then hangs, with the
> (virtual) console reporting:
> [ 2.387986] EXT3-fs: mounted filesystem with ordered data mode.
> Begin: Running /scripts/local-bottom ... done.
> Begin: Running /scripts/init-bottom ... done.
> INIT: version 2.86 booting
> Starting the hotplug events dispatcher: udevd[ 5.467529] udevd
> version 125 started
> Synthesizing the initial hotplug events...done.
> Waiting for /dev to be fully populated...done.
> Starting boot logger: bootlogd[ 6.190409] Adding 3145588k swap on
> /dev/xvda2. Priority:-1 extents:1 across:3145588k
> [ 89.796051] EXT3 FS on xvda1, internal journal
> I've also tried stopping it on one node, booting it on the other; reboot
> the underlying nodes; etc.
> The underlying RAID10 and DRBD arrays are reporting themselves as
> healthy, and during the boot process DRBD seems to shift from secondary
> to primary.
> So.... I know how I might proceed if I were booting a physical machine
> - try to come up in single user mode, failing that, boot with a live CD
> and start examining things. But with everything wired with CRM and Xen
> in the middle of the boot process, I'm a little lost as to how to insert
> myself into the domU boot process for diagnostic purposes.
> Any suggestions?
> Thanks very much,
> Miles Fidelman
> p.s. What makes this particularly vexing is that the DomU that refuses
> to come up has no purpose in life other than to handle nightly backups
> of other domUs. Sigh...
> In theory, there is no difference between theory and practice.
> In<fnord> practice, there is. .... Yogi Berra
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> See also: http://linux-ha.org/ReportingProblems
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