mirror of
https://0xacab.org/liberate/backupninja.git
synced 2024-11-08 20:02:32 +01:00
289 lines
8.0 KiB
Bash
289 lines
8.0 KiB
Bash
# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
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# vim: set filetype=sh sw=3 sts=3 expandtab autoindent:
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#
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# rdiff-backup handler script for backupninja
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# requires rdiff-backup
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#
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### FUNCTIONS ###
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function test_connection() {
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# given a user and host,
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# tests the connection.
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# if user or host is missing, returns 0
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# (ie, assume it's a local connection).
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if [ $# -lt 2 ]; then
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debug "(local is assumed to be a good connection)"
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return 0
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fi
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local user=$1
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local host=$2
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debug "ssh $sshoptions -o PasswordAuthentication=no $host -l $user 'echo -n 1'"
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local ret=`ssh $sshoptions -o PasswordAuthentication=no $host -l $user 'echo -n host is alive'`
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if echo $ret | grep "host is alive"; then
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debug "Connected to $host as $user successfully"
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else
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fatal "Can't connect to $host as $user."
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fi
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}
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function get_version() {
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# given no arguments, returns the local version.
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# given a user and host, returns the remote version.
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# if user or host is missing, returns the local version.
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local version
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if [ "$#" -lt 2 ]; then
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debug "$RDIFFBACKUP -V"
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echo `$RDIFFBACKUP -V`
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else
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local user=$1
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local host=$2
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debug "ssh $sshoptions $host -l $user '$RDIFFBACKUP -V'"
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version=`ssh $sshoptions $host -l $user "$RDIFFBACKUP -V"`
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if [ $? = 127 ]; then
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fatal "Unable to execute rdiff-backup on remote server. It probably isn't installed"
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else
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echo "$version" | grep rdiff-backup
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fi
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fi
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}
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function check_consistency() {
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local section=$1
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local type=$2
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local user=$3
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local host=$4
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if [ "$type" == "local" ]; then
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if [ "$user" != "" ]; then
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warning "User should not be specified for local $section."
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fi
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if [ "$host" != "" ]; then
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warning "Host should not be specified for local $section."
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fi
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fi
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if [ "$type" == "remote" ]; then
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if [ "$user" == "" ]; then
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fatal "User must be specified for remote $section."
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fi
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if [ "$host" == "" ]; then
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fatal "Host must be specifed for remote $section."
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fi
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fi
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}
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function check_cstream() {
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local cstream=$1
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if [ ! -x $cstream ]; then
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fatal "Can't find your cstream binary (trying: $cstream). If you use bwlimit you must have cstream installed."
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fi
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}
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### GET CONFIG ###
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getconf options
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getconf testconnect yes
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getconf nicelevel 0
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getconf bwlimit
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getconf ignore_version no
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getconf output_as_info no
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setsection source
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getconf type; sourcetype=$type
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getconf user; sourceuser=$user
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getconf host; sourcehost=$host
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check_consistency "source" "$type" "$user" "$host"
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getconf label
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getconf keep 60
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getconf include
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getconf vsnames all
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getconf vsinclude
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getconf exclude
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setsection dest
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getconf directory; destdir=$directory
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# strip trailing /
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destdir=${destdir%/}
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getconf type; desttype=$type
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getconf user; destuser=$user
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getconf host; desthost=$host
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getconf sshoptions
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check_consistency "destination" "$type" "$user" "$host"
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if [ -n "$sshoptions" ] && echo $options | grep -qv "remote-schema"; then
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options="$options --remote-schema 'ssh -C $sshoptions %s rdiff-backup --server'"
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fi
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### CHECK CONFIG ###
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# If vservers are configured, check that the ones listed in $vsnames do exist.
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usevserver=no
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if [ $vservers_are_available = yes ]; then
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if [ "$vsnames" = all ]; then
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vsnames="$found_vservers"
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else
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if ! vservers_exist "$vsnames" ; then
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fatal "At least one of the vservers listed in vsnames ($vsnames) does not exist."
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fi
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fi
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if [ -n "$vsinclude" ]; then
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info "Using vservers '$vsnames'"
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usevserver=yes
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fi
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else
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[ -z "$vsinclude" ] || warning 'vservers support disabled in backupninja.conf, vsincludes configuration lines will be ignored'
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fi
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# check the connection at the source and destination
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[ -n "$test" ] || test=0
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if [ "$testconnect" = "yes" ] || [ "${test}" -eq 1 ]; then
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test_connection $sourceuser $sourcehost
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test_connection $destuser $desthost
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fi
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if [ "$ignore_version" != "yes" ]; then
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# see that rdiff-backup has the same version at the source and destination
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sourceversion=`get_version $sourceuser $sourcehost`
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destversion=`get_version $destuser $desthost`
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if [ "$sourceversion" != "$destversion" ]; then
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fatal "rdiff-backup does not have the same version at the source and at the destination."
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fi
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fi
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# source specific checks
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case $sourcetype in
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remote ) execstr_sourcepart="$sourceuser@$sourcehost::/" ;;
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local ) execstr_sourcepart="/" ;;
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* ) fatal "sourcetype '$sourcetype' is neither local nor remote" ;;
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esac
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# destination specific checks
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[ "$destdir" != "" ] || fatal "Destination directory not set"
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case $desttype in
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remote ) execstr_destpart="$destuser@$desthost::$destdir/$label" ;;
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local ) execstr_destpart="$destdir/$label" ;;
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* ) fatal "desttype '$desttype' is neither local nor remote" ;;
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esac
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### REMOVE OLD BACKUPS ###
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if [ "$keep" != yes ]; then
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if [ "`echo $keep | tr -d 0-9`" == "" ]; then
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# add D if no other date unit is specified
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keep="${keep}D"
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fi
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removestr="$RDIFFBACKUP $options --force --remove-older-than $keep "
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if [ "$desttype" == "remote" ]; then
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removestr="${removestr}${destuser}@${desthost}::"
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fi
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removestr="${removestr}${destdir}/${label}";
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debug "$removestr"
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if [ $test = 0 ]; then
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output="`su -c "$removestr" 2>&1`"
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if [ $? = 0 ]; then
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if [ "$output_as_info" == "yes" ]; then
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info "$output"
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else
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debug "$output"
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fi
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info "Removing backups older than $keep days succeeded."
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else
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warning "$output"
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warning "Failed removing backups older than $keep."
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fi
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fi
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fi
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# Add cstream
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if [ ! -z $bwlimit ]; then
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check_cstream $CSTREAM;
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if [ "$desttype" = "remote" ]; then
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RDIFFBACKUP="$RDIFFBACKUP --remote-schema 'cstream -t $bwlimit | ssh %s \''rdiff-backup --server\'''"
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elif [ "$sourcetype" = "remote" ]; then
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RDIFFBACKUP="$RDIFFBACKUP --remote-schema 'ssh %s \''rdiff-backup --server\'' | cstream -t $bwlimit'"
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else
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fatal "You specified a bandwidth limit but neither your source nor destination types are remote."
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fi
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fi
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### EXECUTE ###
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execstr="$RDIFFBACKUP $options --print-statistics "
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set -o noglob
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symlinks_warning="Maybe you have mixed symlinks and '*' in this statement, which is not supported."
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# TODO: order the includes and excludes
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# excludes
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SAVEIFS=$IFS
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IFS=$(echo -en "\n\b")
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for i in $exclude; do
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str="${i//__star__/*}"
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case "$str" in
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@*) execstr="${execstr}--exclude-globbing-filelist '${str#@}' " ;;
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*) execstr="${execstr}--exclude '$str' " ;;
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esac
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done
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IFS=$SAVEIFS
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# includes
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SAVEIFS=$IFS
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IFS=$(echo -en "\n\b")
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for i in $include; do
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[ "$i" != "/" ] || fatal "Sorry, you cannot use 'include = /'"
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str="${i//__star__/*}"
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case "$str" in
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@*) execstr="${execstr}--include-globbing-filelist '${str#@}' " ;;
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*) execstr="${execstr}--include '$str' " ;;
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esac
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done
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IFS=$SAVEIFS
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# vsinclude
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if [ $usevserver = yes ]; then
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for vserver in $vsnames; do
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SAVEIFS=$IFS
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IFS=$(echo -en "\n\b")
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for vi in $vsinclude; do
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str="${vi//__star__/*}"
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str="$VROOTDIR/$vserver$str"
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if [ -n "$str" ]; then
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execstr="${execstr}--include '$str' "
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else
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warning "vsinclude statement '${vi//__star__/*}' will be ignored for VServer $vserver. $symlinks_warning"
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fi
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done
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IFS=$SAVEIFS
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done
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fi
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set +o noglob
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# exclude everything else
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[ "$include" != "" -o "$vsinclude" != "" ] && execstr="${execstr}--exclude '/*' "
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# include client-part and server-part
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execstr="${execstr}$execstr_sourcepart $execstr_destpart"
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debug "$execstr"
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if [ $test = 0 ]; then
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output=`nice -n $nicelevel su -c "$execstr" 2>&1`
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if [ $? = 0 ]; then
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if [ "$output_as_info" == "yes" ]; then
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info "$output"
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else
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debug "$output"
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fi
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info "Successfully finished backing up source $label"
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else
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error "$output"
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fatal "Failed backup up source $label"
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fi
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fi
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return 0
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