esac
}
+copy () {
+ prefix=$1
+ ## Copy lines from stdin to stdout, adding PREFIX.
+
+ while IFS= read -r line; do
+ printf "%s %s\n" "$prefix" "$line"
+ done
+}
+
run () {
tag=$1 cmd=$2; shift 2
## Run CMD, logging its output in a pleasing manner.
{ { { ( set +e
"$cmd" "$@" 3>&- 4>&- 5>&- 9>&-
echo $? >&5; ) |
- while IFS= read line; do echo "| $line"; done >&4; } 2>&1 |
- while IFS= read line; do echo "* $line"; done >&4; } 4>&1 |
+ copy "|" >&4; } 2>&1 |
+ copy "*" >&4; } 4>&1 |
cat >&9; } 5>&1 </dev/null
)
case $rc in
## way it will be processed by a shell.
if localp $host; then run "@$host: $tag" sh -c "$cmd"
- else run "@$host: $tag" ssh $host "$cmd"
+ else run "@$host: $tag" ssh $userat$host "$cmd"
fi
}
## current host is local.
if localp $host; then echo $path
- else echo $host:$path
+ else echo $userat$host:$path
fi
}
+defhook () {
+ hook=$1
+ ## Define a hook called HOOK.
+
+ eval hk_$hook=
+}
+
+addhook () {
+ hook=$1 cmd=$2
+ ## Add command CMD to the hook HOOK.
+
+ eval old=\$hk_$hook; new="$old $cmd"
+ eval hk_$hook=\$new
+}
+
+runhook () {
+ hook=$1; shift 1
+ ## Invoke HOOK, passing it the remaining arguments.
+
+ eval cmds=\$hk_$hook
+ for cmd in $cmds; do
+ if ! $cmd "$@"; then return $?; fi
+ done
+}
+
###--------------------------------------------------------------------------
### Database operations.
## Get the volume host to create the snapshot.
set +e
- _hostrun >&2 3>&- $lvhost \
+ _hostrun >&2 3>&- $userat$lvhost \
"lvcreate --snapshot -n$lv.bkp $SNAPSIZE $vg/$lv"
snaprc=$?
set -e
case $tok in
"$tok_THAWED") ;;
*)
- _hostrun >&2 3>&- $lvhost "lvremove -f $vg/$lv.bkp" || :
+ _hostrun >&2 3>&- $userat$lvhost "lvremove -f $vg/$lv.bkp" || :
echo >&2 "$quis: unexpected token $tok (rfreezefs $fsdir on $fshost)"
exit 1
;;
esac
## Mount the snapshot on the volume host.
- _hostrun >&2 $lvhost "
+ _hostrun >&2 $userat$lvhost "
mkdir -p $SNAPDIR/$lv
mount -oro /dev/$vg/$lv.bkp $SNAPDIR/$lv"
}
bkprc=0
remote_fshash () {
- _hostrun $host "
+ _hostrun $userat$host "
umask 077
mkdir -p $fshashdir
cd ${snapmnt#*:}
done
}
+## Backup hooks.
+defhook setup
+defhook precommit
+defhook postcommit
+
backup_precommit_hook () {
host=$1 fs=$2 date=$3
- ## Override this hook in the configuration file for special effects.
+ ## Compatibility: You can override this hook in the configuration file for
+ ## special effects; but it's better to use `addhook precommit'.
:
}
+addhook precommit backup_precommit_hook
backup_commit_hook () {
host=$1 fs=$2 date=$3
- ## Override this hook in the configuration file for special effects.
+ ## Compatibility: You can override this hook in the configuration file for
+ ## special effects; but it's better to use `addhook commit'.
:
}
+addhook commit backup_commit_hook
do_backup () {
date=$1 fs=$2 fsarg=$3
set -e
attempt=0
+ ## Run a hook beforehand.
+ set +e; runhook setup $host $fs $date; rc=$?; set -e
+ case $? in
+ 0) ;;
+ 99) log "BACKUP of $host:$fs SKIPPED by hook"; return 0 ;;
+ *) log "BACKUP of $host:$fs FAILED (hook returns $?)"; return $? ;;
+ esac
+
## Report the start of this attempt.
log "START BACKUP of $host:$fs"
## Commit this backup.
case $dryrun in
nil)
- backup_precommit_hook $host $fs $date
+ runhook precommit $host $fs $date
mv new $date
mv new.fshash $date.fshash
insert_index $host $fs $date $VOLUME
- backup_commit_hook $host $fs $date
+ runhook commit $host $fs $date
mkdir hack
ln -s $date hack/last
mv hack/last .
esac
}
+run_backup_cmd () {
+ fs=$1 date=$2 cmd=$3; shift 3
+ ## try_backup FS DATE COMMAND ARGS ...
+ ##
+ ## Run COMMAND ARGS to back up filesystem FS on the current host,
+ ## maintaining a log, and checking whether it worked. The caller has
+ ## usually worked out the DATE in order to set up the filesystem, and we
+ ## need it to name the log file properly.
+
+ ## Find a name for the log file. In unusual circumstances, we may have
+ ## deleted old logs from today, so just checking for an unused sequence
+ ## number is insufficient. Instead, check all of the logfiles for today,
+ ## and use a sequence number that's larger than any of them.
+ case $dryrun in
+ t)
+ log=/dev/null
+ ;;
+ nil)
+ seq=1
+ for i in "$logdir/$host/$fs.$date#"*; do
+ tail=${i##*#}
+ case "$tail" in [!1-9]* | *[!0-9]*) continue ;; esac
+ if [ -f "$i" -a $tail -ge $seq ]; then seq=$(( tail + 1 )); fi
+ done
+ log="$logdir/$host/$fs.$date#$seq"
+ ;;
+ esac
+
+ ## Run the backup command.
+ case $dryrun in nil) mkdir -p $logdir/$host ;; esac
+ if ! "$cmd" "$@" 9>$log 1>&9; then
+ echo >&2
+ echo >&2 "$quis: backup of $host:$fs FAILED!"
+ bkprc=1
+ fi
+
+ ## Count up the logfiles.
+ nlog=0
+ for i in "$logdir/$host/$fs".*; do
+ if [ ! -f "$i" ]; then continue; fi
+ nlog=$(( nlog + 1 ))
+ done
+
+ ## If there are too many, go through and delete some early ones.
+ if [ $dryrun = nil ] && [ $nlog -gt $MAXLOG ]; then
+ n=$(( nlog - MAXLOG ))
+ for i in "$logdir/$host/$fs".*; do
+ if [ ! -f "$i" ]; then continue; fi
+ rm -f "$i"
+ n=$(( n - 1 ))
+ if [ $n -eq 0 ]; then break; fi
+ done
+ fi
+}
+
backup () {
## backup FS[:ARG] ...
##
continue
fi
- ## Find a name for the log file. In unusual circumstances, we may have
- ## deleted old logs from today, so just checking for an unused sequence
- ## number is insufficient. Instead, check all of the logfiles for today,
- ## and use a sequence number that's larger than any of them.
- case $dryrun in
- t)
- log=/dev/null
- ;;
- nil)
- seq=1
- for i in "$logdir/$host/$fs.$date#"*; do
- tail=${i##*#}
- case "$tail" in [!1-9]* | *[!0-9]*) continue ;; esac
- if [ -f "$i" -a $tail -ge $seq ]; then seq=$(( tail + 1 )); fi
- done
- log="$logdir/$host/$fs.$date#$seq"
- ;;
- esac
-
## Do the backup of this filesystem.
- case $dryrun in nil) mkdir -p $logdir/$host ;; esac
- if ! do_backup $date $fs $fsarg 9>$log 1>&9; then
- echo >&2
- echo >&2 "$quis: backup of $host:$fs FAILED!"
- bkprc=1
- fi
-
- ## Count up the logfiles.
- nlog=0
- for i in "$logdir/$host/$fs".*; do
- if [ ! -f "$i" ]; then continue; fi
- nlog=$(( nlog + 1 ))
- done
-
- ## If there are too many, go through and delete some early ones.
- if [ $dryrun = nil ] && [ $nlog -gt $MAXLOG ]; then
- n=$(( nlog - MAXLOG ))
- for i in "$logdir/$host/$fs".*; do
- if [ ! -f "$i" ]; then continue; fi
- rm -f "$i"
- n=$(( n - 1 ))
- if [ $n -eq 0 ]; then break; fi
- done
- fi
+ run_backup_cmd $fs $date do_backup $date $fs $fsarg
done
}
###--------------------------------------------------------------------------
### Configuration functions.
+defhook start
+defhook end
+
+done_first_host_p=nil
+
host () {
host=$1
- like=
+ like= userat=
+ case $done_first_host_p in
+ nil) runhook start; done_first_host_p=t ;;
+ esac
case "${expire_policy+t},${default_policy+t}" in
t,) default_policy=$expire_policy ;;
esac
rsyncargs () { rsyncargs="$*"; }
like () { like="$*"; }
retry () { retry="$*"; }
+user () { userat="$*@"; }
retain () {
case $clear_policy in t) unset expire_policy; clear_policy=nil ;; esac
### Read the configuration and we're done.
usage () {
- echo "usage: $quis [-v] [-c CONF]"
+ echo "usage: $quis [-nv] [-c CONF]"
}
version () {
exec 8>&1
. "$conf"
+
+runhook end $bkprc
case "$bkprc" in
0) $verbose "All backups successful" ;;
*) $verbose "Backups FAILED" ;;
~mdw / rsync-backup / blobdiff