I intend to backup a host without stopping its services. To achieve it I've put Debian Sarge's "amdump" in a wrapping bash script that does the following:
1) Open an ssh connection, as root, to the host to be backed up and run on it a script that creates and mounts a snapshot of the /var filesystem. 2) Run Sarge's amdump script 3) Open an ssh connection, as root, to the already backed up host and run a script that unmounts the snapshot and removes it. For the time being the only host that has to be backed up is the amanda server itself. Backups seem to be done right, but once every two runs the hosts hangs and needs to be rebooted just after doing the backup. amcheck is done a couple of hours before amdump. It is also preceded by snapshot creation and followed by snapshot removal and it never fails, Thus I believe I must have overlooked something in amanda's configuration. Can somebody give me a hint so as to make this work? TIA. Maurice Poisson Linux Kernel 2.6.8 SMP (Debian Sarge), LVM2, dm-snapshot module loaded at startup. /etc/amanda/DailySet1/amanda.conf is as follows ---- org "DailySet1" mailto "root" dumpuser "backup" inparallel 4 netusage 600 dumpcycle 1 week runspercycle 6 tapecycle 13 bumpsize 20 MB bumpdays 1 bumpmult 4 tapedev "/dev/nst0" tapetype Python-DDS2 labelstr "^DailySet1[0-9][0-9]*$" diskdir "/usr/dumps" disksize 290 MB infofile "/var/lib/amanda/DailySet1/curinfo" logfile "/var/log/amanda/DailySet1/log" indexdir "/var/lib/amanda/DailySet1/index" define tapetype Python-DDS2 { comment "ARCHIVE Python with DDS2 tape" length 3860 mbytes filemark 16 kbytes speed 707 kps } define dumptype comp-user-tar { program "GNUTAR" comment "partitions dumped with tar" options compress-fast, index, exclude-list "/etc/amanda/exclude.gtar" priority medium } ---- /etc/amanda/DailySet1/disklist is as follows: ---- venus etc /etc comp-user-tar 1 venus boot /boot comp-user-tar 1 venus var /mnt/var { comp-user-tar include "./lib/postgres" "./lib/cyrus/db" "./lib/cyrus/deliver.db" "./lib/cyrus/mailboxes.db" "./lib/cyrus/quota" "./lib/cyrus/tls_sessions.db" "./lib/cyrus/user" "./spool/cyrus/" "./spool/sieve" "./lib/amanda" } 1 venus home /home { comp-user-tar include "./debian" } 1 ---- /etc/amanda/DailySet1/amdump-wrapper is as follows: ---- #!/bin/bash SSH_KEY=/etc/amanda/DailySet1/id_rsa [EMAIL PROTECTED] CREATE=/etc/amanda/DailySet1/ctsnapshot REMOVE=/etc/amanda/DailySet1/rmsnapshot # Connect to the target host and create the snapshot. /usr/bin/ssh -q -i $SSH_KEY -o 'BatchMode yes' $TARGET $CREATE # Do the backup /usr/sbin/amdump DailySet1 # Connect to the target host and remove the snapshot. /usr/bin/ssh -q -i $SSH_KEY -o 'BatchMode yes' $TARGET $REMOVE ---- /etc/amanda/DailySet1/ctsnapshot is as follows: ---- #!/bin/bash SNAP_SIZE=500M SNAP_NAME=snap VOL_GROUP=/dev/vg00 SRC_VOLUME=var SNAP_SOURCE=$VOL_GROUP/$SRC_VOLUME SNAP_VOLUME=$VOL_GROUP/$SNAP_NAME SNAP_MOUNT=/mnt/$SRC_VOLUME # Create mountpoint for the snapshot volume. if [ ! -d "$SNAP_MOUNT" ]; then mkdir -p $SNAP_MOUNT fi # Snapshot the volume. 500M room for changes should be enough. sync && sleep 1 && sync && sleep 1 && sync /usr/bin/nice -n -19 /sbin/lvcreate -s -L $SNAP_SIZE -n $SNAP_NAME $SNAP_SOURCE >& /dev/null || ( echo "Error creating snapshot of $SNAP_SOURCE: $?" && exit 1 ) # Mount the snapshot. /bin/mount -o ro $SNAP_VOLUME $SNAP_MOUNT || ( echo "Error mounting snapshot of /var: $?" && exit 1 ) - and /etc/amanda/DailySet1/rmsnapshot is as follows: ---- #!/bin/bash SNAP_NAME=snap VOL_GROUP=/dev/vg00 SRC_VOLUME=var SNAP_VOLUME=$VOL_GROUP/$SNAP_NAME SNAP_MOUNT=/mnt/$SRC_VOLUME # Unmount the snapshot and remove the volume. ( /bin/umount $SNAP_MOUNT || ( echo "Error unmounting $SNAP_MOUNT: $?" && exit 1 )) && ( /sbin/lvremove -f $SNAP_VOLUME >& /dev/null || ( echo "Error removing volume $SNAP_VOLUME: $?" && exit 1 )) # Trash the mount point. if [ -d "$SNAP_MOUNT" ]; then rmdir $SNAP_MOUNT fi ---- -- Maurice Poisson Adriasola <[EMAIL PROTECTED]>