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# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
# vim: set filetype=sh sw=3 sts=3 expandtab autoindent:
#
# PostgreSQL handler script for backupninja
#
getconf backupdir /var/backups/postgres
getconf databases all
getconf compress yes
getconf vsname
# format maps to pg_dump --format= option, old/default was plain
getconf format plain
localhost=`hostname`
# Decide if the handler should operate on a vserver or on the host.
# In the former case, check that $vsname exists and is running.
local usevserver=no
local vroot
if [ $vservers_are_available = yes ]; then
if [ -n "$vsname" ]; then
# does it exist ?
if ! vservers_exist "$vsname" ; then
fatal "The vserver given in vsname ($vsname) does not exist."
fi
# is it running ?
vservers_running $vsname || fatal "The vserver $vsname is not running."
# everything ok
info "Using vserver '$vsname'."
usevserver=yes
vroot="$VROOTDIR/$vsname"
else
info "No vserver name specified, actions will be performed on the host."
fi
fi
# Make sure that the system to backup has the needed executables
if [ $usevserver = yes ]; then
debug "Examining vserver '$vsname'."
if [ "$databases" == "all" ] && [ "$format" = "plain" ]; then
[ -x "$vroot`$VSERVER $vsname exec which $PGSQLDUMPALL`" ] || \
fatal "Can't find $PGSQLDUMPALL in vserver $vsname."
elif [ "$format" != "plain" ]; then
[ -x "$vroot`$VSERVER $vsname exec which $PGSQLDUMPALL`" ] || \
fatal "Can't find $PGSQLDUMPALL in vserver $vsname."
[ -x "$vroot`$VSERVER $vsname exec which $PGSQLDUMP`" ] || \
fatal "Can't find $PGSQLDUMP in vserver $vsname."
[ -x "$vroot`$VSERVER $vsname exec which $PSQL`" ] || \
fatal "Can't find $PSQL in vserver $vsname."
else
[ -x "$vroot`$VSERVER $vsname exec which $PGSQLDUMP`" ] || \
fatal "Can't find $PGSQLDUMP in vserver $vsname."
fi
else
if [ "$databases" == "all" ] && [ "$format" = "plain" ]; then
[ -x "`which $PGSQLDUMPALL`" ] || \
fatal "Can't find $PGSQLDUMPALL."
elif [ "$format" != "plain" ]; then
[ -x "`which $PGSQLDUMPALL`" ] || \
fatal "Can't find $PGSQLDUMPALL."
[ -x "`which $PGSQLDUMP`" ] || \
fatal "Can't find $PGSQLDUMP."
[ -x "`which $PSQL`" ] || \
fatal "Can't find $PSQL."
else
[ -x "`which $PGSQLDUMP`" ] || \
fatal "Can't find $PGSQLDUMP."
fi
fi
# create backup dir, the vroot variable will be empty if no vsname was specified
# and will proceed to operate on the host
[ -d $vroot$backupdir ] || (debug "mkdir -p $vroot$backupdir"; mkdir -p $vroot$backupdir)
[ -d $vroot$backupdir ] || fatal "Backup directory '$vroot$backupdir' does not exist, and could not be created."
# give backup dir the good uid and permissions
# (in respect to the vserver, if $usevserver = yes)
if [ $usevserver = yes ]; then
pguid=`$VSERVER $vsname exec getent passwd $PGSQLUSER | @AWK@ -F: '{print $3}'`
else
pguid=`getent passwd $PGSQLUSER | @AWK@ -F: '{print $3}'`
fi
[ -n "$pguid" ] || \
fatal "No user called $PGSQLUSER`[ $usevserver = no ] || echo \" on vserver $vsname\"`."
debug "chown $pguid $vroot$backupdir"
chown $pguid $vroot$backupdir
debug "chmod 700 $vroot$backupdir"
chmod 700 $vroot$backupdir
# If we are using the custom (best) or tar pg_dump format, and
# dumping "all" databases, we will substitute "all" for a list
# of all non-template databases to avoid the use of pg_dumpall.
dumpglobals="no"
if [ "$databases" = "all" ] && [ "$format" != "plain" ]; then
cmdprefix=""
if [ "$usevserver" = "yes" ]; then
cmdprefix="$VSERVER $vsname exec "
fi
execstr="${cmdprefix} su - $PGSQLUSER -c 'psql -AtU $PGSQLUSER -c \"SELECT datname FROM pg_database WHERE NOT datistemplate\"'"
debug execstr
dblist=""
for db in $(eval $execstr 2>&1); do
dblist="$dblist $db"
done
if [ "$dblist" != "" ]; then
databases="$dblist"
fi
# Dump globals (pg_dumpall -g) for roles and tablespaces
dumpglobals="yes"
fi
# if $databases = all, use pg_dumpall
if [ "$databases" == "all" ]; then
if [ $usevserver = yes ]; then
if [ "$compress" == "yes" ]; then
execstr="$VSERVER $vsname exec su - $PGSQLUSER -c \"set -o pipefail ; $PGSQLDUMPALL | $GZIP $GZIP_OPTS > '$backupdir/${vsname}.sql.gz'\""
else
execstr="$VSERVER $vsname exec su - $PGSQLUSER -c \"$PGSQLDUMPALL > '$backupdir/${vsname}.sql'\""
fi
else
if [ "$compress" == "yes" ]; then
execstr="su - $PGSQLUSER -c \"set -o pipefail ; $PGSQLDUMPALL | $GZIP $GZIP_OPTS > '$backupdir/${localhost}-all.sql.gz'\""
else
execstr="su - $PGSQLUSER -c \"$PGSQLDUMPALL > '$backupdir/${localhost}-all.sql'\""
fi
fi
debug "$execstr"
if [ ! $test ]; then
output=`eval $execstr 2>&1`
code=$?
if [ "$code" == "0" ]; then
debug $output
info "Successfully finished dump of pgsql cluster"
else
warning $output
warning "Failed to dump pgsql cluster"
fi
fi
# else use pg_dump on each specified database
else
# If we're not doing plain format, database=all may now be database=list
# so we track the database=all selection in dumpglobals which tells us
# to also dump the roles and tablespaces via pg_dumpall -g
if [ "$dumpglobals" = "yes" ]; then
globalscmd=""
if [ "$compress" == "yes" ]; then
globalscmd="set -o pipefail ; $PGSQLDUMPALL -g | $GZIP $GZIP_OPTS > '$backupdir/globals.sql.gz'"
else
globalscmd="$PGSQLDUMPALL -g > '$backupdir/globals.sql'"
fi
if [ $usevserver = yes ]; then
execstr="$VSERVER $vsname exec su - $PGSQLUSER -c \"$globalscmd\""
else
execstr="su - $PGSQLUSER -c \"$globalscmd\""
fi
debug "$execstr"
if [ ! $test ]; then
output=`eval $execstr 2>&1`
code=$?
if [ "$code" == "0" ]; then
debug $output
info "Successfully finished pgsql globals (roles and tablespaces) dump"
else
warning $output
warning "Failed to dump pgsql globals (roles and tablespaces)"
fi
fi
fi
for db in $databases; do
dumpext=".sql"
if [ "$format" != "plain" ]; then
dumpext="pg_dump"
fi
# To better support the backupninja global GZIP and rsync-friendly GZIP_OPTS
# the custom archive format is told to disable compression. The plain format
# is uncompressed by default and the tar format doesn't support pg_dump compression.
disablecustomcompress=""
if [ "$format" = "custom" ]; then
disablecustomcompress="--compress=0"
fi
dumpcmd=""
globalscmd=""
if [ "$compress" == "yes" ]; then
dumpcmd="set -o pipefail ; $PGSQLDUMP --format=$format ${disablecustomcompress} $db | $GZIP $GZIP_OPTS > '$backupdir/${db}.${dumpext}.gz'"
else
dumpcmd="$PGSQLDUMP --format=$format ${disablecustomcompress} $db | > '$backupdir/${db}.${dumpext}'"
fi
if [ $usevserver = yes ]; then
execstr="$VSERVER $vsname exec su - $PGSQLUSER -c \"$dumpcmd\""
else
execstr="su - $PGSQLUSER -c \"$dumpcmd\""
fi
debug "$execstr"
if [ ! $test ]; then
output=`eval $execstr 2>&1`
code=$?
if [ "$code" == "0" ]; then
debug $output
info "Successfully finished dump of pgsql database ${db}"
else
warning $output
warning "Failed to dump pgsql database ${db}"
fi
fi
done
fi
return 0
|
