mirror of
https://0xacab.org/liberate/backupninja.git
synced 2024-11-08 20:02:32 +01:00
337 lines
11 KiB
Bash
337 lines
11 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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# duplicity script for backupninja
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# requires duplicity
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#
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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 tmpdir
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setsection gpg
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getconf password
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getconf sign no
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getconf encryptkey
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getconf signkey
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setsection source
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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 incremental yes
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getconf increments 30
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getconf keep 60
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getconf desturl
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getconf awsaccesskeyid
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getconf awssecretaccesskey
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getconf ftp_password
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getconf sshoptions
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getconf bandwidthlimit 0
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getconf desthost
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getconf destdir
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getconf destuser
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destdir=${destdir%/}
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### SANITY CHECKS ##############################################################
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[ -n "$desturl" -o -n "$destdir" ] || fatal "The destination directory (destdir) must be set when desturl is not used."
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[ -n "$include" -o -n "$vsinclude" ] || fatal "No source includes specified"
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[ -n "$password" ] || fatal "The password option must be set."
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if [ "`echo $desturl | @AWK@ -F ':' '{print $1}'`" == "s3+http" ]; then
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[ -n "$awsaccesskeyid" -a -n "$awssecretaccesskey" ] || fatal "AWS access keys must be set for S3 backups."
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fi
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if [ "`echo $desturl | @AWK@ -F ':' '{print $1}'`" == "ftp" ]; then
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[ -n "$ftp_password" ] || fatal "ftp_password must be set for FTP backups."
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fi
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### VServers
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# If vservers are configured, check that the ones listed in $vsnames do exist.
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local 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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### See if we can login on $desthost
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if [ "$testconnect" == "yes" ]; then
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if [ -n "$desturl" ]; then
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warning 'testconnect can not be used when desturl is set'
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else
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debug "ssh $sshoptions -o PasswordAuthentication=no $desthost -l $destuser 'echo -n 1'"
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if [ ! $test ]; then
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result=`ssh $sshoptions -o PasswordAuthentication=no $desthost -l $destuser 'echo -n 1'`
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if [ "$result" != "1" ]; then
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fatal "Can't connect to $desthost as $destuser."
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else
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debug "Connected to $desthost as $destuser successfully"
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fi
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fi
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fi
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fi
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### COMMAND-LINE MANGLING ######################################################
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### initialize $execstr*
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execstr_command=
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execstr_options="$options --no-print-statistics"
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execstr_source=
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if [ -n "$desturl" ]; then
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[ -z "$destuser" ] || warning 'the configured destuser is ignored since desturl is set'
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[ -z "$desthost" ] || warning 'the configured desthost is ignored since desturl is set'
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[ -z "$destdir" ] || warning 'the configured destdir is ignored since desturl is set'
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execstr_serverpart="$desturl"
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else
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execstr_serverpart="scp://$destuser@$desthost/$destdir"
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fi
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### duplicity version (ignore anything else than 0-9 and ".")
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duplicity_version="`duplicity --version | @AWK@ '{print $2}' | @SED@ 's/[^.[:digit:]]//g'`"
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duplicity_major="`echo $duplicity_version | @AWK@ -F '.' '{print $1}'`"
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duplicity_minor="`echo $duplicity_version | @AWK@ -F '.' '{print $2}'`"
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duplicity_sub="`echo $duplicity_version | @AWK@ -F '.' '{print $3}'`"
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### ssh/scp/sftp options
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# 1. duplicity >= 0.4.2 needs --sftp-command
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# (NB: sftp does not support the -l option)
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# 2. duplicity 0.4.3 to 0.4.9 replace --ssh-command with --ssh-options, which is
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# passed to scp and sftp commands by duplicity. We don't use it: since this
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# version does not use the ssh command anymore, we keep compatibility with
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# our previous config files by passing $sshoptions to --scp-command and
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# --sftp-command ourselves
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scpoptions="$sshoptions"
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if [ "$bandwidthlimit" != 0 ]; then
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[ -z "$desturl" ] || warning 'The bandwidthlimit option is not used when desturl is set.'
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scpoptions="$scpoptions -l $bandwidthlimit"
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fi
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# < 0.4.2 : only uses ssh and scp
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if [ "$duplicity_major" -le 0 -a "$duplicity_minor" -le 4 -a "$duplicity_sub" -lt 2 ]; then
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execstr_options="${execstr_options} --scp-command 'scp $scpoptions' --ssh-command 'ssh $sshoptions'"
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# >= 0.4.2 : also uses sftp, --sftp-command option is now supported
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else
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sftpoptions="$sshoptions"
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# == 0.4.2 : uses ssh, scp and sftp
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if [ "$duplicity_major" -eq 0 -a "$duplicity_minor" -eq 4 -a "$duplicity_sub" -eq 2 ]; then
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execstr_options="${execstr_options} --scp-command 'scp $scpoptions' --sftp-command 'sftp $sftpoptions' --ssh-command 'ssh $sshoptions'"
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# >= 0.4.3 : uses only scp and sftp, --ssh-command option is not supported anymore
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else
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execstr_options="${execstr_options} --scp-command 'scp $scpoptions' --sftp-command 'sftp $sftpoptions'"
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fi
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fi
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### Symmetric or asymmetric (public/private key pair) encryption
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if [ -n "$encryptkey" ]; then
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execstr_options="${execstr_options} --encrypt-key $encryptkey"
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debug "Data will be encrypted with the GnuPG key $encryptkey."
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else
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debug "Data will be encrypted using symmetric encryption."
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fi
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### Data signing (or not)
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if [ "$sign" == yes ]; then
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# duplicity is not able to sign data when using symmetric encryption
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[ -n "$encryptkey" ] || fatal "The encryptkey option must be set when signing."
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# if needed, initialize signkey to a value that is not empty (checked above)
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[ -n "$signkey" ] || signkey="$encryptkey"
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execstr_options="${execstr_options} --sign-key $signkey"
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debug "Data will be signed will the GnuPG key $signkey."
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else
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debug "Data won't be signed."
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fi
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### Incremental or full backup mode
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# If incremental==yes, use the default duplicity behaviour: perform an
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# incremental backup if old signatures can be found, else switch to
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# full backup.
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# If incremental==no, force a full backup anyway.
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if [ "$incremental" == "no" ]; then
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# before 0.4.4, full was an option and not a command
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if [ "$duplicity_major" -le 0 -a "$duplicity_minor" -le 4 -a "$duplicity_sub" -lt 4 ]; then
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execstr_options="${execstr_options} --full"
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else
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execstr_command="full"
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fi
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else
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# we're in incremental mode
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if [ "$increments" != "keep" ]; then
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# if we don't want to keep every increments
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if [ "`echo $increments | tr -d 0-9`" == "" ]; then
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increments="${increments}D"
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fi
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execstr_options="${execstr_options} --full-if-older-than $increments"
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fi
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fi
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### Cleanup options
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if [ "$duplicity_major" -ge 0 -a "$duplicity_minor" -ge 6 -a "$duplicity_sub" -ge 1 ]; then
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execstr_options="${execstr_options} --extra-clean"
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fi
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### Temporary directory
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precmd=
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if [ -n "$tmpdir" ]; then
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if [ ! -d "$tmpdir" ]; then
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info "Temporary directory ($tmpdir) does not exist, creating it."
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mkdir -p "$tmpdir"
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[ $? -eq 0 ] || fatal "Could not create temporary directory ($tmpdir)."
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chmod 0700 "$tmpdir"
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fi
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info "Using $tmpdir as TMPDIR"
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precmd="${precmd}TMPDIR=$tmpdir "
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fi
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### Archive directory
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# duplicity >= 0.6.01 enables the archive_dir by default, let's put it into /var/cache/backupninja/duplicity
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# unless the user has specified it.
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if [ "$duplicity_major" -ge 0 -a "$duplicity_minor" -ge 6 -a "$duplicity_sub" -ge 1 ]; then
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if echo "${options}" | grep -qv -- "--archive-dir" ; then
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execstr_options="${execstr_options} --archive-dir /var/cache/backupninja/duplicity"
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fi
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fi
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### Cleanup old backup sets (or not)
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if [ "$keep" != "yes" ]; then
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if [ "`echo $keep | tr -d 0-9`" == "" ]; then
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keep="${keep}D"
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fi
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# before 0.4.4, remove-older-than was an option and not a command
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if [ "$duplicity_major" -le 0 -a "$duplicity_minor" -le 4 -a "$duplicity_sub" -lt 4 ]; then
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execstr_options="${execstr_options} --remove-older-than $keep"
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fi
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fi
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### Source
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set -o noglob
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# excludes
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SAVEIFS=$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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execstr_source="${execstr_source} --exclude '$str'"
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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="${i//__star__/*}"
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execstr_source="${execstr_source} --include '$str'"
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done
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IFS=$SAVEIFS
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# vsincludes
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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$str"
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execstr_source="${execstr_source} --include '$str'"
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done
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IFS=$SAVEIFS
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done
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fi
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set +o noglob
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### EXECUTE ####################################################################
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execstr_source=${execstr_source//\\*/\\\\\\*}
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### If desturl is an S3 URL export the AWS environment variables
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if [ "`echo $desturl | @AWK@ -F ':' '{print $1}'`" == "s3+http" ]; then
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export AWS_ACCESS_KEY_ID="$awsaccesskeyid"
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export AWS_SECRET_ACCESS_KEY="$awssecretaccesskey"
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fi
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### Cleanup commands (duplicity >= 0.4.4)
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# cleanup
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if [ "$duplicity_major" -ge 0 -a "$duplicity_minor" -ge 4 -a "$duplicity_sub" -ge 4 ]; then
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debug "$precmd duplicity cleanup --force $execstr_options $execstr_serverpart"
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if [ ! $test ]; then
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export PASSPHRASE=$password
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export FTP_PASSWORD=$ftp_password
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output=`nice -n $nicelevel \
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su -c \
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"$precmd duplicity cleanup --force $execstr_options $execstr_serverpart 2>&1"`
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exit_code=$?
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if [ $exit_code -eq 0 ]; then
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debug $output
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info "Duplicity cleanup finished successfully."
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else
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debug $output
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warning "Duplicity cleanup failed."
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fi
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fi
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fi
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# remove-older-than
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if [ "$keep" != "yes" ]; then
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if [ "$duplicity_major" -ge 0 -a "$duplicity_minor" -ge 4 -a "$duplicity_sub" -ge 4 ]; then
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debug "$precmd duplicity remove-older-than $keep --force $execstr_options $execstr_serverpart"
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if [ ! $test ]; then
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export PASSPHRASE=$password
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export FTP_PASSWORD=$ftp_password
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output=`nice -n $nicelevel \
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su -c \
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"$precmd duplicity remove-older-than $keep --force $execstr_options $execstr_serverpart 2>&1"`
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exit_code=$?
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if [ $exit_code -eq 0 ]; then
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debug $output
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info "Duplicity remove-older-than finished successfully."
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else
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debug $output
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warning "Duplicity remove-older-than failed."
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fi
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fi
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fi
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fi
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### Backup command
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debug "$precmd duplicity $execstr_command $execstr_options $execstr_source --exclude '**' / $execstr_serverpart"
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if [ ! $test ]; then
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outputfile=`maketemp backupout`
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export PASSPHRASE=$password
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export FTP_PASSWORD=$ftp_password
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output=`nice -n $nicelevel \
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su -c \
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"$precmd duplicity $execstr_command $execstr_options $execstr_source --exclude '**' / $execstr_serverpart >$outputfile 2>&1"`
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exit_code=$?
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debug $output
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cat $outputfile | (while read output ; do
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info $output
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done
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)
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if [ $exit_code -eq 0 ]; then
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info "Duplicity finished successfully."
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else
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fatal "Duplicity failed."
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fi
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rm $outputfile
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fi
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return 0
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