Change the postgresql backup script so that it can backup local databases as postgres user, without authentication.
This commit is contained in:
Andrea Dell'Amico
parent
5a4d729503
commit
3bc6406f44
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@ -1,12 +1,14 @@
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#!/bin/bash
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# Set up the environment
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if [ -f /etc/default/pg_backup ] ; then
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. /etc/default/pg_backup
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else
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N_DAYS_TO_SPARE=7
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USE_NAGIOS=no
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BUILD_DBLIST=yes
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PG_USE_AUTH=yes
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PG_USE_AUTH=no
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PG_PASS_FILE=/root/.pgpass
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BACKUPDIR=/var/lib/pgsql/backups
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DB_LIST=
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@ -22,68 +24,109 @@ TIMESTAMP_LOG=$BACKUPDIR/.timestamp
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# If nagios is active, save the report status for each backup
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# Nagios return values: 0 = OK, 1 = WARNING, 2 = CRITICAL, 3 = UNKNOWN
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NAGIOS_LOG=$BACKUPDIR/.nagios-status
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if [ ! -d ${BACKUPDIR} ] ; then
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mkdir -p ${BACKUPDIR}
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fi
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if [ ! -d ${HISTDIR} ] ; then
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mkdir -p ${HISTDIR}
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fi
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DUMP_RESULT=0
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LOCKFILE=${BACKUPDIR}/.dumplock
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create_backup_dirs() {
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if [ ! -d ${BACKUPDIR} ] ; then
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mkdir -p ${BACKUPDIR}
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fi
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if [ ! -d ${HISTDIR} ] ; then
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mkdir -p ${HISTDIR}
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fi
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if [ "${PG_USE_AUTH}" == "no" ] ; then
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chown -R postgres:postgres $BACKUPDIR
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fi
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}
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cleanup_old_backups() {
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# Remove the old backups
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find ${HISTDIR} -ctime +$N_DAYS_TO_SPARE -exec rm -f {} \;
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}
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create_db_list() {
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# The psql -l command prints too much stuff
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#DB_LIST=$( psql -q -t -l -U postgres | grep -v template0 | grep -v template1 | grep -v : | grep -v ^\( | grep -v ^\- | awk '{print $1}' )
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DB_LIST=$( su - postgres -c "/usr/lib/postgresql/${PG_VERSION}/bin/oid2name " | awk '{print $2}' | tail -n +4 | grep -v template0 | grep -v template1 )
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}
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run_backup_as_db_user() {
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for db in $DB_LIST ; do
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grep ":${db}:" "$PG_PASS_FILE" 2>/dev/null
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DB_IN_AUTFILE_RETVAL=$?
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if [ $DB_IN_AUTFILE_RETVAL -eq 0 ] ; then
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PG_HOST=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 1 )
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PG_PORT=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 2 )
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PG_USER=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 4 )
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${PG_DUMP_BIN} -Fc -h $PG_HOST -p $PG_PORT -U $PG_USER $db > ${HISTDIR}/$db.data.$SAVE_TIME
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DUMP_RESULT=$?
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else
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DUMP_RESULT=2
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fi
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pushd ${BACKUPDIR}/ >/dev/null 2>&1
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rm -f $db.data
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ln -s ${HISTDIR}/$db.data.$SAVE_TIME ./$db.data
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popd >/dev/null 2>&1
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done
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}
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run_backup_as_postgres() {
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su - postgres -c "pg_dumpall -g > ${HISTDIR}/pgsql-global.data.$SAVE_TIME"
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for db in $DB_LIST ; do
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su - postgres -c "${PG_DUMP_BIN} -Fc $db > ${HISTDIR}/$db.data.$SAVE_TIME"
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DUMP_RESULT=$?
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pushd ${BACKUPDIR}/ >/dev/null 2>&1
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rm -f $db.data
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ln -s ${HISTDIR}/$db.data.$SAVE_TIME ./$db.data
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popd >/dev/null 2>&1
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done
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}
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clear_nagios_data() {
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if [ "$USE_NAGIOS" == "yes" ] ; then
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> $NAGIOS_LOG
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fi
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}
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write_nagios_data() {
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if [ "$USE_NAGIOS" == "yes" ] ; then
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if [ $DUMP_RESULT -ne 0 ] ; then
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echo "$db:FAILED" >> $NAGIOS_LOG
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RETVAL=$DUMP_RESULT
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else
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echo "$db:OK" >> $NAGIOS_LOG
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fi
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fi
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}
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########
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#
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# Main
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#
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umask 0077
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create_backup_dirs
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if [ "$BUILD_DBLIST" == "yes" ] ; then
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# The psql -l command prints too much stuff
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#DB_LIST=$( psql -q -t -l -U postgres | grep -v template0 | grep -v template1 | grep -v : | grep -v ^\( | grep -v ^\- | awk '{print $1}' )
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DB_LIST=$( su - postgres -c "/usr/lib/postgresql/${PG_VERSION}/bin/oid2name " | awk '{print $2}' | tail -n +4 | grep -v template0 | grep -v template1 )
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create_db_list
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fi
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if [ ! -f $LOCKFILE ] ; then
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touch $LOCKFILE
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if [ "$USE_NAGIOS" == "yes" ] ; then
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> $NAGIOS_LOG
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fi
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if [ "${PG_USE_AUTH}" == "yes" -a ! -f $PG_PASS_FILE ] ; then
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if [ "$USE_NAGIOS" == "yes" ] ; then
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echo ".pgpass file not found, but authentication needed. All dbs: FAILED" >> $NAGIOS_LOG
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fi
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RETVAL=2
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clear_nagios_data
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if [ "${PG_USE_AUTH}" == "yes" ] ; then
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if [ ! -f $PG_PASS_FILE -o -z $PG_PASS_FILE ] ; then
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if [ "$USE_NAGIOS" == "yes" ] ; then
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echo ".pgpass file not found or empty but authentication needed. All db backups FAILED" >> $NAGIOS_LOG
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fi
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RETVAL=2
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exit 2
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fi
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run_backup_as_db_user
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else
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# Backup of the db system data
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# pg_dumpall -U postgres -g > ${HISTDIR}/pgsql-global.data.$SAVE_TIME
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# Dump all the databases
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for db in $DB_LIST ; do
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if [ "${PG_USE_AUTH}" == "yes" ] ; then
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DB_IN_AUTFILE=$( grep :${db}: $PG_PASS_FILE )
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DB_IN_AUTFILE_RETVAL=$?
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if [ $DB_IN_AUTFILE_RETVAL -eq 0 ] ; then
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PG_HOST=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 1 )
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PG_PORT=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 2 )
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PG_USER=$( grep :${db}: $PG_PASS_FILE | cut -d : -f 4 )
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${PG_DUMP_BIN} -Fc -h $PG_HOST -p $PG_PORT -U $PG_USER $db > ${HISTDIR}/$db.data.$SAVE_TIME
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DUMP_RESULT=$?
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else
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DUMP_RESULT=2
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fi
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else
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${PG_DUMP_BIN} -Fc -U postgres $db > ${HISTDIR}/$db.data.$SAVE_TIME
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DUMP_RESULT=$?
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fi
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if [ "$USE_NAGIOS" == "yes" ] ; then
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if [ $DUMP_RESULT -ne 0 ] ; then
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echo "$db:FAILED" >> $NAGIOS_LOG
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RETVAL=$DUMP_RESULT
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else
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echo "$db:OK" >> $NAGIOS_LOG
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fi
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fi
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pushd ${BACKUPDIR}/ >/dev/null 2>&1
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rm -f $db.data
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ln -s ${HISTDIR}/$db.data.$SAVE_TIME ./$db.data
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popd >/dev/null 2>&1
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done
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run_backup_as_postgres
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fi
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write_nagios_data
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TIMESTAMP=$( date +%s )
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echo "$TIMESTAMP" > $TIMESTAMP_LOG
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rm -f $LOCKFILE
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@ -94,8 +137,6 @@ else
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fi
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fi
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# Remove the old backups
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find ${HISTDIR} -ctime +$N_DAYS_TO_SPARE -exec rm -f {} \;
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cleanup_old_backups
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exit $RETVAL
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