On 5/6/2016 3:07 AM, Pann Tolk wrote:
Hi Josh,
......
May 06 14:34:06 deneb systemd-udevd[2578]:
'/usr/libexec/vchanger/vchanger-launch-mount.sh
1fde15be-83a4-4b67-accc-378d5fa10ea7'(err) ' device-enumerator:
scanning /sys/class'
====>> May 06 14:34:06 deneb systemd-udevd[2578]: Process
'/usr/libexec/vchanger/vchanger-launch-mount.sh
1fde15be-83a4-4b67-accc-378d5fa10ea7' succeeded.
^^^
^^^ Here, udevd says that
/usr/libexec/vchanger/vchanger-launch-mount.sh script has completed
running successfully.
Udev expects any scripts launched by udev rules to execute quickly and
not cause delays, therefore the vchanger-launch-mount.sh script launched
by udev simply causes the /usr/libexec/vchanger/vchanger-mount-uuid.sh
script to be invoked as a background process and then terminates. So a
success simply means that vchanger-launch-maount.sh successfully invoked
vchanger-mount-uuid.sh in a background process, not that it mounted
successfully.
The default mountdir is /mnt. To mount under say /mnt/vchanger it is
necessary to set MOUNTDIR=/mnt/vchanger in /etc/sysconfig/vchanger.
Alternatively, you can use a line like
UUID=1fde15be-83a4-4b67-accc-378d5fa10ea7 /any/existing/directory/name
ext4 defaults,rw,relatime,data=ordered 0 0
in /etc/fstab to cause vchanger-mount-uuid.sh to mount it wherever you
like. When specified as magazine=uuid:, vchanger will lookup the
mountpoint using libudev and so doesn't really care where it gets
mounted. When using magazine=/some/static/path, it must be mounted at
the specified path.
You can umount the partition and then run vchanger-mount-uuid.sh (as
root) with the uuid as its only parameter to see what it does.
Unfortunately, the script is very simple and doesn't provide logging.
A point to note about the kernel reporting that it has mounted the
filesystem. When I checked with mount command, the filesystem was not
mounted.
[root@deneb ~]# mount | grep vchanger
[root@deneb ~]#
Don't know why. Did /usr/libexec/vchanger/vchanger-launch-mount.sh
actually mounts it?
No. /usr/libexec/vchanger/vchanger-mount-uuid.sh does. If mount info for
the partition is not specified by uuid in /etc/fstab, then it mounts it
at $MOUNTDIR/$1, where $1 is the filesystem UUID. So you can use mount |
grep 1fde15be-83a4-4b67-accc-378d5fa10ea7 to find it.
Anyway, to test further, I manually mount it:
[root@deneb ~]# mount
/dev/disk/by-uuid/1fde15be-83a4-4b67-accc-378d5fa10ea7
/mnt/vchanger/1fde15be-83a4-4b67-accc-378d5fa10ea7/
[root@deneb ~]# mount | grep vchanger
/dev/sdb1 on /mnt/vchanger/1fde15be-83a4-4b67-accc-378d5fa10ea7 type
ext4 (rw,relatime,data=ordered)
[root@deneb ~]#
Then, I did what you mentioned:- I modified
/etc/vchanger/vchanger01.conf and changed the
bconsole="/usr/sbin/bconsole" line to bconsole = "".
Then I tried the following again.
[root@deneb ~]# vchanger /etc/vchanger/vchanger01.conf listmags
device-enumerator: scan all dirs
device-enumerator: scanning /sys/bus
device-enumerator: scanning /sys/class
device-enumerator: scan all dirs
device-enumerator: scanning /sys/bus
device-enumerator: scanning /sys/class
device-enumerator: scan all dirs
device-enumerator: scanning /sys/bus
device-enumerator: scanning /sys/class
device-enumerator: scan all dirs
device-enumerator: scanning /sys/bus
device-enumerator: scanning /sys/class
0:18:1:/mnt/vchanger/1fde15be-83a4-4b67-accc-378d5fa10ea7
1:::
2:::
3:::
So vchanger is working properly when run as root. What does it do when
you run that same command as user bacula:tape? Are you sure bacula-sd is
running as user bacula:tape? vchanger must run as the same user as
bacula-sd. It could still be a permissions issue. You can set 'log level
= 7' and 'logfile = /path/to/logfile' in vchanger.conf to debug
vchanger, but you must run it as user bacula:tape to debug if it is a
permissions issue.
[root@deneb ~]# vchanger /etc/vchanger/vchanger01.conf list
device-enumerator: scan all dirs
device-enumerator: scanning /sys/bus
device-enumerator: scanning /sys/class
device-enumerator: scan all dirs
device-enumerator: scanning /sys/bus
device-enumerator: scanning /sys/class
device-enumerator: scan all dirs
device-enumerator: scanning /sys/bus
device-enumerator: scanning /sys/class
device-enumerator: scan all dirs
device-enumerator: scanning /sys/bus
device-enumerator: scanning /sys/class
1:vchanger01_0_0
2:vchanger01_0_1
3:vchanger01_0_10
4:vchanger01_0_11
5:vchanger01_0_12
6:vchanger01_0_13
7:vchanger01_0_14
8:vchanger01_0_15
9:vchanger01_0_16
10:vchanger01_0_17
11:vchanger01_0_2
12:vchanger01_0_3
13:vchanger01_0_4
14:vchanger01_0_5
15:vchanger01_0_6
16:vchanger01_0_7
17:vchanger01_0_8
18:vchanger01_0_9
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
[root@deneb ~]# bconsole
Connecting to Director deneb.chuakt.local:9101
1000 OK: 102 bacula-dir Version: 7.4.0 (16 January 2016)
Enter a period to cancel a command.
*update slots
Automatically selected Catalog: MyCatalog
Using Catalog "MyCatalog"
Automatically selected Storage: vchanger01
Connecting to Storage daemon vchanger01 at deneb.chuakt.local:9103 ...
3306 Issuing autochanger "slots" command.
Device "SATA-vchanger01" has 0 slots.
No slots in changer to scan.
*
In the end, I'm still getting the error in bconsole:
Device "SATA-vchanger01" has 0 slots.
No slots in changer to scan.
By any chance I may have misconfigured something within
bacula-dir.conf and bacula-sd.conf?
Thanks again,
Pann
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your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
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