mirror of https://github.com/digint/btrbk
143 lines
4.0 KiB
Bash
Executable File
143 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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## Wrapper script running "btrbk" and sending email with results
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set -uf
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declare -A rsync_src rsync_dst rsync_log rsync_key rsync_opt
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now=$(/bin/date +%Y%m%d)
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##### start config section #####
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# Email recipients, separated by whitespace:
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mailto=$MAILTO
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# List of mountpoints to be mounted/unmounted (whitespace-separated)
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# mount_targets="/mnt/btr_pool /mnt/backup"
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mount_targets=
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umount_targets=$mount_targets
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# btrbk configuration file:
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config="/etc/btrbk/btrbk.conf"
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# Uncomment this if you only want to receive error messages:
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#btrbk_opts="-q"
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#skip_empty_mail=yes
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# Email subject:
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mail_subject_prefix="btrbk <${HOSTNAME:-localhost}>"
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# rsync declarations (repeat complete block for more declarations):
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rsync_src[example_data]=user@example.com:/data/
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rsync_dst[example_data]=/mnt/backup/example.com/data/
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rsync_log[example_data]=/mnt/backup/example.com/data-${now}.log
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rsync_key[example_data]=/mnt/backup/ssh_keys/id_rsa
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rsync_opt[example_data]="-az --delete"
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# Enabled rsync declarations (space separated list)
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#rsync_enable="example_data"
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rsync_enable=
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# Log level (1=error, 2=warn, 3=info)
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loglevel=2
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##### end config section #####
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die()
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{
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/bin/echo "$0 FATAL: $1" 1>&2
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/bin/echo "$0 FATAL: exiting" 1>&2
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exit 1
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}
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log_error() { [ $loglevel -ge 1 ] && /bin/echo "$0 ERROR: $1" 1>&2 ; }
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log_warning() { [ $loglevel -ge 2 ] && /bin/echo "$0 WARNING: $1" 1>&2 ; }
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log_info() { [ $loglevel -ge 3 ] && /bin/echo "$0 INFO: $1" 1>&2 ; }
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#
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# mount all mountpoints listed in $mount_targets
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#
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for mountpoint in $mount_targets; do
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$(/bin/findmnt -r -n -t btrfs $mountpoint 1>&2)
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if [ $? = 0 ]; then
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log_warning "btrfs filesystem already mounted: $mountpoint"
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else
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log_info "mount $mountpoint"
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$(/bin/mount --target $mountpoint 1>&2)
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[ $? = 0 ] || log_error "mount failed: $mountpoint"
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fi
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done
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#
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# run rsync for all $rsync_enable
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#
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for key in $rsync_enable; do
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log_info "starting rsync: $key"
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[ -n "${rsync_src[$key]}" ] || die "rsync_src is not set for \"$key\""
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[ -n "${rsync_dst[$key]}" ] || die "rsync_dst is not set for \"$key\""
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[ -n "${rsync_log[$key]}" ] || die "rsync_log is not set for \"$key\""
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[ -n "${rsync_key[$key]}" ] || die "rsync_key is not set for \"$key\""
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[ -n "${rsync_opt[$key]}" ] || die "rsync_opt is not set for \"$key\""
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if [ -d ${rsync_dst[$key]} ]; then
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/bin/echo "### rsync ${rsync_opt[$key]} ${rsync_src[$key]} ${rsync_dst[$key]}" >> ${rsync_log[$key]}
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/usr/bin/rsync ${rsync_opt[$key]} --log-file=${rsync_log[$key]} -e "/usr/bin/ssh -i ${rsync_key[$key]}" ${rsync_src[$key]} ${rsync_dst[$key]}
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[ $? = 0 ] || log_error "rsync failed: $key"
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else
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log_error "rsync destination directory not found for \"$key\", skipping: ${rsync_dst[$key]}"
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fi
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done
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#
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# run btrbk
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#
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log_info "running btrbk"
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ret=$(/usr/sbin/btrbk -c "$config" ${btrbk_opts:-} run 2>&1)
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exitcode=$?
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case $exitcode in
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0) status="All backups successful"
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;;
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10) status="ERROR: At least one backup task aborted!"
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;;
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*) status="ERROR: $btrbk failed with error code $exitcode"
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;;
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esac
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# filter "At subvol ..." messages from "btrfs send" and "btrfs receive" (see issue #33).
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ret=$(/bin/echo "$ret" | grep -v '^At subvol ')
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if [ "${skip_empty_mail:-no}" = "yes" ] && [ -z "$ret" ] && [ $exitcode -eq 0 ]; then
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: # skip email sending if skip_empty_mail=yes
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else
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# send email
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/bin/echo "$ret" | /bin/mail -s "$mail_subject_prefix - $status" $mailto
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[ $? = 0 ] || die "failed to send btrbk mail to \"$mailto\""
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fi
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#
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# sync all mountpoints listed in $umount_targets
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#
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# exit on failure!
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#for mountpoint in $umount_targets; do
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# log_info "btrfs filesystem sync $mountpoint"
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# $(/sbin/btrfs filesystem sync $mountpoint 1>&2)
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# [ $? = 0 ] || die "btrfs filesystem sync failed: $mountpoint"
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# sleep 1
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#done
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#
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# unmount all mountpoints listed in $umount_targets
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#
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for mountpoint in $umount_targets; do
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log_info "umount $mountpoint"
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$(/bin/umount $mountpoint 1>&2)
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[ $? = 0 ] || log_error "umount failed: $mountpoint"
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done
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