ansible-role-postgresql/templates/postgresql-backup.sh.j2

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#!/bin/bash
# Set up the environment
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{% if ansible_distribution_file_variety == "Debian" %}
if [ -f {{ pg_backup_conf_dir }}/pg_backup ] ; then
. {{ pg_backup_conf_dir }}/pg_backup
{% elif ansible_distribution_file_variety == "RedHat" %}
if [ -f {{ pg_el_backup_conf_dir }}/pg_backup ] ; then
. {{ pg_el_backup_conf_dir }}/pg_backup
{% endif %}
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else
N_DAYS_TO_SPARE=7
USE_NAGIOS=no
BUILD_DBLIST=yes
PG_USE_AUTH=no
PG_PASS_FILE=/root/.pgpass
BACKUPDIR=/var/lib/pgsql/backups
DB_LIST=
fi
# Year month day - hour minute second
SAVE_TIME=$( date +%Y%m%d-%H%M%S )
TIMESTAMP=
RETVAL=0
#export LANG=C
HISTDIR=$BACKUPDIR/history
TIMESTAMP_LOG=$BACKUPDIR/.timestamp
# If nagios is active, save the report status for each backup
# Nagios return values: 0 = OK, 1 = WARNING, 2 = CRITICAL, 3 = UNKNOWN
NAGIOS_LOG=$BACKUPDIR/.nagios-status
DUMP_RESULT=0
LOCKFILE=${BACKUPDIR}/.dumplock
create_backup_dirs() {
if [ ! -d ${BACKUPDIR} ] ; then
mkdir -p ${BACKUPDIR}
fi
if [ ! -d ${HISTDIR} ] ; then
mkdir -p ${HISTDIR}
fi
if [ "${PG_USE_AUTH}" == "no" ] ; then
chown -R postgres:postgres $BACKUPDIR
fi
}
cleanup_old_backups() {
# Remove the old backups
find ${HISTDIR} -atime +${N_DAYS_TO_SPARE} -type f -exec rm -f {} \;
# TODELETE=$( /bin/ls "${HISTDIR}/" | awk -F '.' '{print $NF}' | sort -ruV | tail -n +${N_DAYS_TO_SPARE} )
# for i in ${TODELETE}
# do
# rm -f "${HISTDIR}/*.${i}"
# done
}
create_db_list() {
# The psql -l command prints too much stuff
#DB_LIST=$( psql -q -t -l -U postgres | grep -v template0 | grep -v template1 | grep -v : | grep -v ^\( | grep -v ^\- | awk '{print $1}' )
DB_LIST=$( su - postgres -c "/usr/lib/postgresql/${PG_VERSION}/bin/oid2name " | awk '{print $2}' | tail -n +4 | grep -v template0 | grep -v template1 )
}
run_backup_as_db_user() {
for db in $DB_LIST ; do
grep ":${db}:" "$PG_PASS_FILE" 2>/dev/null
DB_IN_AUTFILE_RETVAL=$?
if [ $DB_IN_AUTFILE_RETVAL -eq 0 ] ; then
PG_HOST=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 1 )
PG_PORT=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 2 )
PG_USER=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 4 )
${PG_DUMP_BIN} -Fc -h $PG_HOST -p $PG_PORT -U $PG_USER $db > ${HISTDIR}/$db.data.$SAVE_TIME
DUMP_RESULT=$?
else
DUMP_RESULT=2
fi
pushd ${BACKUPDIR}/ >/dev/null 2>&1
rm -f $db.data
ln -s ${HISTDIR}/$db.data.$SAVE_TIME ./$db.data
popd >/dev/null 2>&1
done
}
run_backup_as_postgres() {
su - postgres -c "pg_dumpall -g > ${HISTDIR}/pgsql-global.data.$SAVE_TIME"
for db in $DB_LIST ; do
su - postgres -c "${PG_DUMP_BIN} -Fc $db > ${HISTDIR}/$db.data.$SAVE_TIME"
DUMP_RESULT=$?
pushd ${BACKUPDIR}/ >/dev/null 2>&1
rm -f $db.data
ln -s ${HISTDIR}/$db.data.$SAVE_TIME ./$db.data
popd >/dev/null 2>&1
done
}
clear_nagios_data() {
if [ "$USE_NAGIOS" == "yes" ] ; then
> $NAGIOS_LOG
fi
}
write_nagios_data() {
if [ "$USE_NAGIOS" == "yes" ] ; then
if [ $DUMP_RESULT -ne 0 ] ; then
echo "$db:FAILED" >> $NAGIOS_LOG
RETVAL=$DUMP_RESULT
else
echo "$db:OK" >> $NAGIOS_LOG
fi
fi
}
fix_backup_permissions() {
chmod -R u+rwX,g-rwx,o-rwx ${HISTDIR}
}
########
#
# Main
#
umask 0077
create_backup_dirs
if [ "$BUILD_DBLIST" == "yes" ] ; then
create_db_list
fi
if [ ! -f $LOCKFILE ] ; then
touch $LOCKFILE
clear_nagios_data
if [ "${PG_USE_AUTH}" == "yes" ] ; then
if [ ! -f $PG_PASS_FILE -o -z $PG_PASS_FILE ] ; then
if [ "$USE_NAGIOS" == "yes" ] ; then
echo ".pgpass file not found or empty but authentication needed. All db backups FAILED" >> $NAGIOS_LOG
fi
RETVAL=2
exit 2
fi
run_backup_as_db_user
else
run_backup_as_postgres
fi
write_nagios_data
TIMESTAMP=$( date +%s )
echo "$TIMESTAMP" > $TIMESTAMP_LOG
rm -f $LOCKFILE
else
RETVAL=2
if [ "$USE_NAGIOS" == "yes" ] ; then
echo "old backup still running:WARNING" >> $NAGIOS_LOG
fi
fi
fix_backup_permissions
cleanup_old_backups
exit $RETVAL