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| -rw-r--r-- | handlers/rsnap | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/handlers/rsnap b/handlers/rsnap new file mode 100644 index 0000000..017a456 --- /dev/null +++ b/handlers/rsnap @@ -0,0 +1,244 @@ +# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*- +# +# rsync backup handler for backupninja +# requires rsync and optional freedups +# +# freedups: +# http://www.stearns.org/freedups/ +# http://freshmeat.net/projects/freedups/ +# +# rsync: +# http://samba.anu.edu.au/rsync/ + +# exit on error +#set -e + +# System commands used by this script +# replace with absolute path's if neccecary +getconf rm rm +getconf cp cp +getconf touch touch +getconf mv mv +getconf ssh ssh +getconf tr tr +getconf rsync $RSYNC + +setsection options +getconf options +getconf label +getconf nicelevel 0 +getconf keep 60 + +setsection source +getconf testconnect no +getconf srchost localhost +getconf compress 1 +getconf sshoptions +getconf bandwidthlimit 1000 +getconf remote_rsync rsync +getconf numericids 1 +getconf include +getconf vsnames all +getconf vsinclude +getconf include +getconf exclude + +setsection dest +getconf directory +getconf enable_mv_timestamp_bug no +getconf freedups freedups +getconf enable_freedups no +getconf incremental yes + +# Apparently, a bug in some Linux kernels between 2.4.4 and 2.4.9 causes mv to update timestamps; +# this may result in inaccurate timestamps on the snapshot directories. +# Set enable_mv_timestamp_bug=1 to enable this workaround +if [ $enable_mv_timestamp_bug == "yes" ]; then + mv=my_mv +fi; + +function my_mv() { + ref=/tmp/makesnapshot-mymv-$$; + $touch -r $1 $ref; + $mv $1 $2; + $touch -r $ref $2; + $rm $ref; +} + +if [ $enable_freedups == "yes" ]; then + # $freedups + debug "Not implemented yet!" +fi; + + +[ "$directory" != "" ] || fatal "Destination directory not set" +[ "$include" != "" ] || fatal "No source includes specified" + +### vservers stuff ### + +# If vservers are configured, check that the ones listed in $vsnames do exist. +local usevserver=no +if [ $vservers_are_available = yes ]; then + if [ "$vsnames" = all ]; then + vsnames="$found_vservers" + else + if ! vservers_exist "$vsnames" ; then + fatal "At least one of the vservers listed in vsnames ($vsnames) does not exist." + fi + fi + if [ -n "$vsinclude" ]; then + info "Using vservers '$vsnames'" + usevserver=yes + fi +else + [ -z "$vsinclude" ] || warning 'vservers support disabled in backupninja.conf, vsincludes configuration lines will be ignored' + [ -z "$vsnames" ] || warning 'vservers support disabled in backupninja.conf, vsnames configuration line will be ignored' +fi + +### see if we can login ### + +if [ "$testconnect" == "yes" ]; then + debug "$ssh $sshoptions -o PasswordAuthentication=no $srchost 'echo -n 1'" + if [ ! $test ]; then + result=`ssh $sshoptions -o PasswordAuthentication=no $srchost 'echo -n 1'` + if [ "$result" != "1" ]; then + fatal "Can't connect to $srchost." + else + debug "Connected to $srchost successfully" + fi + fi +fi + +### COMMAND-LINE MANGLING ### + +[ "$bandwidthlimit" == 1000 ] || options="$options --bwlimit=$bandwidthlimit" +[ "$numericids" == 1 ] || options="$options --numeric-ids " +[ "$compress" == 1 ] || options="$options --compress " +[ "$remote_rsync" == "rsync" ] || options="$options --rsync-path=$remote_rsync" + +if [ "$nicelevel" -ne 0 ]; then + nice="nice -n $nicelevel" ; +else + nice=""; +fi + +execstr="$options --exclude '/' --delete-during --delete-excluded --archive $sshoptions " + +if [ "$incremental" == "no" ]; then + execstr="${execstr} --whole-file " +fi + +execstr_serverpart="$srchost:/" + + +### SOURCE ### + +set -o noglob + +# excludes +for i in $exclude; do + str="${i//__star__/*}" + #execstr="${execstr}--exclude '$str' " + execstr="${execstr}--exclude $str " +done + +# includes +for i in $include; do + str="${i//__star__/*}" + #execstr="${execstr}--include '$str' " + execstr="${execstr}--include $str " +done + +# vsincludes +if [ $usevserver = yes ]; then + for vserver in $vsnames; do + for vi in $vsinclude; do + str="${vi//__star__/*}" + execstr="${execstr}--include '$label/$vserver$str' " + done + done +fi + + +### SNAPSHOT ROTATION ### + +if [ "$incremental" == "yes" ]; then + debug "starting to rotate the old dirs" + # rotating snapshots + # delete the oldest snapshot, if it exists: + debug "does $directory/$label/$keep exist?" + if [ -d "$directory/$label/$keep" ] ; then + debug "$rm -rf $directory/$label/$keep" + if [ !$test ]; then + #$rm -rf "$directory/$label/$keep" ; + debug "$rm -rf $directory/$label/$keep"; + fi; + fi; + + # shift the snapshots(s) back by one, if they exist + for (( i=$keep; $i>=0; i--)) ; do + debug "does $directory/$label/$i exist?" + if [ -d "$directory/$label/$i" ] ; then + debug "$mv $directory/$label/$i $directory/$label/$(($i + 1))" + if [ !$test ]; then + $mv "$directory/$label/$i" "$directory/$label/$(($i + 1))" + fi; + fi; + done + + # make a hard-link-only (except for dirs) copy of + # assuming that exists, into the new dir + if [ -d "$directory/$label/1" ]; then + debug "$cp -al $directory/$label/1 $directory/$label/0" + if [ !$test ]; then + $cp -al $directory/$label/1 $directory/$label/0 ; + fi; + fi; + +fi + + +set +o noglob + +### EXECUTE ### + +# exclude everything else, start with root +#execstr="${execstr}--exclude '*' " + +# include client-part and server-part +#execstr="$execstr $execstr_serverpart" + +execstr=${execstr//\\*/\\\\\\*} + +if [ "$debug" == "1" ]; then + execstr=" --verbose $execstr"; + # execstr=" --verbose --dry-run $execstr"; +else + execstr=" --quiet $execstr"; +fi; + +debug "$rsync $execstr $execstr_serverpart $directory/$label/0" + + +# rsync from the system into the latest snapshot (notice that +# rsync behaves like cp --remove-destination by default, so the destination +# is unlinked first. If it were not so, this would copy over the other +# snapshot(s) too! +output=`$nice $rsync $execstr $execstr_serverpart $directory/$label/0 2>&1` +code=$? + +# update the mtime of the 0 dir to reflect the snapshot time +$touch $directory/$label/0 + +if [ $code -eq 0 ]; then + debug $output + info "rsync finished successfully."; +else + debug "returncode $code : $output " + #fatal "rsync failed."; + warning "rsync failed."; +fi; + + +return 0; + |