Add 'latest' link creation
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208
pg_backup_rotated.sh
Executable file
208
pg_backup_rotated.sh
Executable file
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#!/bin/bash
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###########################
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####### LOAD CONFIG #######
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###########################
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while [ $# -gt 0 ]; do
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case $1 in
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-c)
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CONFIG_FILE_PATH="$2"
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shift 2
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;;
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*)
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${ECHO} "Unknown Option \"$1\"" 1>&2
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exit 2
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;;
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esac
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done
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if [ -z $CONFIG_FILE_PATH ] ; then
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SCRIPTPATH=$(cd ${0%/*} && pwd -P)
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CONFIG_FILE_PATH="${SCRIPTPATH}/pg_backup.config"
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fi
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if [ ! -r ${CONFIG_FILE_PATH} ] ; then
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echo "Could not load config file from ${CONFIG_FILE_PATH}" 1>&2
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exit 1
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fi
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source "${CONFIG_FILE_PATH}"
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###########################
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#### PRE-BACKUP CHECKS ####
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###########################
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# Make sure we're running as the required backup user
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if [ "$BACKUP_USER" != "" -a "$(id -un)" != "$BACKUP_USER" ] ; then
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echo "This script must be run as $BACKUP_USER. Exiting." 1>&2
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exit 1
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fi
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###########################
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### INITIALISE DEFAULTS ###
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###########################
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if [ ! $HOSTNAME ]; then
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HOSTNAME="localhost"
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fi;
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if [ ! $USERNAME ]; then
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USERNAME="postgres"
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fi;
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###########################
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#### START THE BACKUPS ####
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###########################
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function perform_backups()
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{
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SUFFIX=$1
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FINAL_BACKUP_DIR=$BACKUP_DIR"`date +\%Y-\%m-\%d`$SUFFIX/"
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echo "Making backup directory in $FINAL_BACKUP_DIR"
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if ! mkdir -p $FINAL_BACKUP_DIR; then
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echo "Cannot create backup directory in $FINAL_BACKUP_DIR. Go and fix it!" 1>&2
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exit 1;
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fi;
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#######################
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### GLOBALS BACKUPS ###
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#######################
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echo -e "\n\nPerforming globals backup"
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echo -e "--------------------------------------------\n"
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if [ $ENABLE_GLOBALS_BACKUPS = "yes" ]
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then
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echo "Globals backup"
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set -o pipefail
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if ! pg_dumpall -g -h "$HOSTNAME" -U "$USERNAME" | gzip > $FINAL_BACKUP_DIR"globals".sql.gz.in_progress; then
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echo "[!!ERROR!!] Failed to produce globals backup" 1>&2
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else
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mv $FINAL_BACKUP_DIR"globals".sql.gz.in_progress $FINAL_BACKUP_DIR"globals".sql.gz
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fi
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set +o pipefail
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else
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echo "None"
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fi
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###########################
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### SCHEMA-ONLY BACKUPS ###
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###########################
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for SCHEMA_ONLY_DB in ${SCHEMA_ONLY_LIST//,/ }
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do
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SCHEMA_ONLY_CLAUSE="$SCHEMA_ONLY_CLAUSE or datname ~ '$SCHEMA_ONLY_DB'"
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done
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SCHEMA_ONLY_QUERY="select datname from pg_database where false $SCHEMA_ONLY_CLAUSE order by datname;"
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echo -e "\n\nPerforming schema-only backups"
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echo -e "--------------------------------------------\n"
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SCHEMA_ONLY_DB_LIST=`psql -h "$HOSTNAME" -U "$USERNAME" -At -c "$SCHEMA_ONLY_QUERY" postgres`
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echo -e "The following databases were matched for schema-only backup:\n${SCHEMA_ONLY_DB_LIST}\n"
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for DATABASE in $SCHEMA_ONLY_DB_LIST
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do
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echo "Schema-only backup of $DATABASE"
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set -o pipefail
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if ! pg_dump -Fp -s -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" | gzip > $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz.in_progress; then
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echo "[!!ERROR!!] Failed to backup database schema of $DATABASE" 1>&2
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else
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mv $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz.in_progress $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz
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fi
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set +o pipefail
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done
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###########################
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###### FULL BACKUPS #######
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###########################
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for SCHEMA_ONLY_DB in ${SCHEMA_ONLY_LIST//,/ }
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do
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EXCLUDE_SCHEMA_ONLY_CLAUSE="$EXCLUDE_SCHEMA_ONLY_CLAUSE and datname !~ '$SCHEMA_ONLY_DB'"
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done
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FULL_BACKUP_QUERY="select datname from pg_database where not datistemplate and datallowconn $EXCLUDE_SCHEMA_ONLY_CLAUSE order by datname;"
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echo -e "\n\nPerforming full backups"
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echo -e "--------------------------------------------\n"
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for DATABASE in `psql -h "$HOSTNAME" -U "$USERNAME" -At -c "$FULL_BACKUP_QUERY" postgres`
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do
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if [ $ENABLE_PLAIN_BACKUPS = "yes" ]
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then
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echo "Plain backup of $DATABASE"
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set -o pipefail
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if ! pg_dump -Fp -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" | gzip > $FINAL_BACKUP_DIR"$DATABASE".sql.gz.in_progress; then
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echo "[!!ERROR!!] Failed to produce plain backup database $DATABASE" 1>&2
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else
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mv $FINAL_BACKUP_DIR"$DATABASE".sql.gz.in_progress $FINAL_BACKUP_DIR"$DATABASE".sql.gz
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fi
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set +o pipefail
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fi
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if [ $ENABLE_CUSTOM_BACKUPS = "yes" ]
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then
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echo "Custom backup of $DATABASE"
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if ! pg_dump -Fc -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" -f $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress; then
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echo "[!!ERROR!!] Failed to produce custom backup database $DATABASE"
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else
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mv $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress $FINAL_BACKUP_DIR"$DATABASE".custom
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fi
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fi
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done
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echo -e "\nAll database backups complete!"
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}
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# MONTHLY BACKUPS
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DAY_OF_MONTH=`date +%d`
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if [ $DAY_OF_MONTH -eq 1 ];
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then
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# Delete all expired monthly directories
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find $BACKUP_DIR -maxdepth 1 -name "*-monthly" -exec rm -rf '{}' ';'
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perform_backups "-monthly"
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exit 0;
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fi
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# WEEKLY BACKUPS
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DAY_OF_WEEK=`date +%u` #1-7 (Monday-Sunday)
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EXPIRED_DAYS=`expr $((($WEEKS_TO_KEEP * 7) + 1))`
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if [ $DAY_OF_WEEK = $DAY_OF_WEEK_TO_KEEP ];
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then
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# Delete all expired weekly directories
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find $BACKUP_DIR -maxdepth 1 -mtime +$EXPIRED_DAYS -name "*-weekly" -exec rm -rf '{}' ';'
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perform_backups "-weekly"
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exit 0;
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fi
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# DAILY BACKUPS
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# Delete daily backups 7 days old or more
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find $BACKUP_DIR -maxdepth 1 -mtime +$DAYS_TO_KEEP -name "*-daily" -exec rm -rf '{}' ';'
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perform_backups "-daily"
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ln -nsf
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ln -nsf $FINAL_BACKUP_DIR $BACKUP_DIR/latest
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