We're looking at using Bacula to back up the contents of VMware virtual
machines from snapshots of the filesystem containing the VMDK file. In
particular, we have a test instance of FreeNAS in a VMware virtual
machine, and a server running Bacula that makes snapshots and performs
from-snapshot and from-client backups reliably (although more slowly
than we would like).
I wrote a BeforeJob script like the following:
## (omitting our standard command that makes and mounts a snapshot)
sudo mount /mnt/iofreenastest -o remount,rw
yes | sudo /opt/vmware-server/bin/vmware-mount.pl \
/mnt/iofreenastest/FreeNAS.vmdk 6 /mnt/freenas-6 \
-o ufstype=5xbsd,ro &
sleep 3
mount | grep 'on /mnt/freenas-6' || exit 1
However, when the job ran, the director never picked up after the
BeforeJob. A few hours later, I checked on it. Here's what some of "ps
aefx" looked like:
17247 ? Ssl 2:02 /usr/sbin/bacula-dir -c
/etc/bacula/bacula-dir.conf -
19430 ? Z 0:00 \_ [freenas_before] <defunct>
19575 ? S 0:00 sh -c '/opt/vmware-server/bin/vmware-loop' -q
'/mnt/i
19576 ? S 0:01 \_ /opt/vmware-server/bin/vmware-loop -q
/mnt/iofree
19577 ? S 0:00 \_ /opt/vmware-server/bin/vmware-loop -q
/mnt/io
(there was a "yes" process in there as well, but it has scrolled off my
screen)
I tried unsticking it by killing the "yes" process and the "sh" process,
both with no effect. Killing the "vmware-loop" process got it going
again, but of course that unmounted the directory I wanted to back up,
and actually caused the job to fail:
18-Dec 19:46 backup-test2-dir: BeforeJob: run command
"/etc/bacula/scripts/freenas_before"
18-Dec 19:46 backup-test2-dir: BeforeJob: Snapshot already exists.
18-Dec 19:46 backup-test2-dir: BeforeJob: Cleaning up stale snapshot
bacula-immediate-6135a of 10.x.y.z...
18-Dec 19:46 backup-test2-dir: BeforeJob: deleting snapshot...
18-Dec 19:46 backup-test2-dir: BeforeJob: LUN unmapped OK.
18-Dec 19:46 backup-test2-dir: BeforeJob: creating snapshot...
18-Dec 19:46 backup-test2-dir: BeforeJob: lun map: auto-assigned
Backup=0
18-Dec 19:46 backup-test2-dir: BeforeJob: iscsiadm: No active sessions.
18-Dec 19:46 backup-test2-dir: BeforeJob: 10.x.y.z:3260,2000
iqn.1992-08.com.netapp:sn.sn
18-Dec 19:46 backup-test2-dir: BeforeJob: Login session [iface: default,
target: iqn.1992-08.com.netapp:sn.sn, portal: 10.x.y.z,3260]
18-Dec 19:46 backup-test2-dir: BeforeJob: Rescanning session [sid: 58,
iface: , target: iqn.1992-08.com.netapp:sn.sn, portal: 10.x.y.z,3260]
18-Dec 19:46 backup-test2-dir: BeforeJob:
18-Dec 19:46 backup-test2-dir: BeforeJob:
--------------------------------------------
18-Dec 19:46 backup-test2-dir: BeforeJob: VMware for Linux - Virtual
Hard Disk Mounter
18-Dec 19:46 backup-test2-dir: BeforeJob: Version: 1.0 build-*****
18-Dec 19:46 backup-test2-dir: BeforeJob: Copyright 1998 VMware, Inc.
All rights reserved. -- VMware Confidential
18-Dec 19:46 backup-test2-dir: BeforeJob:
--------------------------------------------
18-Dec 19:46 backup-test2-dir: BeforeJob:
18-Dec 19:46 backup-test2-dir: BeforeJob: It has been reported that this
program does not work correctly with 2.4+ Linux
18-Dec 19:46 backup-test2-dir: BeforeJob: kernels in some cases, and you
are currently running such a kernel. Do you
18-Dec 19:46 backup-test2-dir: BeforeJob: really want to continue? [N]
18-Dec 19:46 backup-test2-dir: BeforeJob: Network Block Device driver
detected.
18-Dec 19:46 backup-test2-dir: BeforeJob:
18-Dec 19:46 backup-test2-dir: BeforeJob: Client: The partition is now
mapped on the /dev/nb0 Network Block Device.
18-Dec 19:46 backup-test2-dir: BeforeJob:
18-Dec 19:46 backup-test2-dir: BeforeJob: Using another terminal, you
can now browse your Virtual Hard Disk partition in
18-Dec 19:46 backup-test2-dir: BeforeJob: /mnt/freenas-6. Hit Control-C
in this terminal when done.
19-Dec 09:46 backup-test2-dir: BeforeJob: Warning: The NBD_DO_IT ioctl
returned an error: Broken pipe
19-Dec 09:46 backup-test2-dir:
TestBackupFreeNASVmwareLoop.2008-12-18_16.55.02 Error: Runscript:
BeforeJob returned non-zero status=1. ERR=Child exited with code 1
I guess the vmware-loop process is still somehow related to the
director, which is why Bacula hung. Has anyone gotten Bacula to mount
and back up an idle VMDK file, either with vmware-mount.pl or invoking
vmware-loop directly, or by some other program?
--
David Lee Lambert
Yahoo! IM: davidleelambert * MSN IM: lambe...@cse.msu.edu
Slashdot/Sourceforge UID: lamber45
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