postgres-backup/script/pg_backup.sh

166 lines
4.5 KiB
Bash

#!/bin/bash
###########################
####### LOAD CONFIG #######
###########################
while [ $# -gt 0 ]; do
case $1 in
-c)
if [ -r "$2" ]; then
source "$2"
shift 2
else
${ECHO} "Unreadable config file \"$2\"" 1>&2
exit 1
fi
;;
*)
${ECHO} "Unknown Option \"$1\"" 1>&2
exit 2
;;
esac
done
if [ $# = 0 ]; then
SCRIPTPATH=$(cd ${0%/*} && pwd -P)
source $SCRIPTPATH/pg_backup.config
fi;
###########################
#### PRE-BACKUP CHECKS ####
###########################
# Make sure we're running as the required backup user
if [ "$BACKUP_USER" != "" -a "$(id -un)" != "$BACKUP_USER" ]; then
echo "This script must be run as $BACKUP_USER. Exiting." 1>&2
exit 1;
fi;
###########################
### INITIALISE DEFAULTS ###
###########################
if [ ! $HOSTNAME ]; then
HOSTNAME="localhost"
fi;
if [ ! $USERNAME ]; then
USERNAME="postgres"
fi;
###########################
#### START THE BACKUPS ####
###########################
FINAL_BACKUP_DIR=$BACKUP_DIR"`date +\%Y-\%m-\%d`/"
echo "Making backup directory in $FINAL_BACKUP_DIR"
if ! mkdir -p $FINAL_BACKUP_DIR; then
echo "Cannot create backup directory in $FINAL_BACKUP_DIR. Go and fix it!" 1>&2
exit 1;
fi;
#######################
### GLOBALS BACKUPS ###
#######################
echo -e "\n\nPerforming globals backup"
echo -e "--------------------------------------------\n"
if [ $ENABLE_GLOBALS_BACKUPS = "yes" ]
then
echo "Globals backup"
set -o pipefail
if ! pg_dumpall -g -h "$HOSTNAME" -U "$USERNAME" | gzip > $FINAL_BACKUP_DIR"globals".sql.gz.in_progress; then
echo "[!!ERROR!!] Failed to produce globals backup" 1>&2
else
mv $FINAL_BACKUP_DIR"globals".sql.gz.in_progress $FINAL_BACKUP_DIR"globals".sql.gz
fi
set +o pipefail
else
echo "None"
fi
###########################
### SCHEMA-ONLY BACKUPS ###
###########################
for SCHEMA_ONLY_DB in ${SCHEMA_ONLY_LIST//,/ }
do
SCHEMA_ONLY_CLAUSE="$SCHEMA_ONLY_CLAUSE or datname ~ '$SCHEMA_ONLY_DB'"
done
SCHEMA_ONLY_QUERY="select datname from pg_database where false $SCHEMA_ONLY_CLAUSE order by datname;"
echo -e "\n\nPerforming schema-only backups"
echo -e "--------------------------------------------\n"
SCHEMA_ONLY_DB_LIST=`psql -h "$HOSTNAME" -U "$USERNAME" -At -c "$SCHEMA_ONLY_QUERY" postgres`
echo -e "The following databases were matched for schema-only backup:\n${SCHEMA_ONLY_DB_LIST}\n"
for DATABASE in $SCHEMA_ONLY_DB_LIST
do
echo "Schema-only backup of $DATABASE"
set -o pipefail
if ! pg_dump -Fp -s -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" | gzip > $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz.in_progress; then
echo "[!!ERROR!!] Failed to backup database schema of $DATABASE" 1>&2
else
mv $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz.in_progress $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz
fi
set +o pipefail
done
###########################
###### FULL BACKUPS #######
###########################
for SCHEMA_ONLY_DB in ${SCHEMA_ONLY_LIST//,/ }
do
EXCLUDE_SCHEMA_ONLY_CLAUSE="$EXCLUDE_SCHEMA_ONLY_CLAUSE and datname !~ '$SCHEMA_ONLY_DB'"
done
FULL_BACKUP_QUERY="select datname from pg_database where not datistemplate and datallowconn $EXCLUDE_SCHEMA_ONLY_CLAUSE order by datname;"
echo -e "\n\nPerforming full backups"
echo -e "--------------------------------------------\n"
for DATABASE in `psql -h "$HOSTNAME" -U "$USERNAME" -At -c "$FULL_BACKUP_QUERY" postgres`
do
if [ $ENABLE_PLAIN_BACKUPS = "yes" ]
then
echo "Plain backup of $DATABASE"
set -o pipefail
if ! pg_dump -Fp -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" | gzip > $FINAL_BACKUP_DIR"$DATABASE".sql.gz.in_progress; then
echo "[!!ERROR!!] Failed to produce plain backup database $DATABASE" 1>&2
else
mv $FINAL_BACKUP_DIR"$DATABASE".sql.gz.in_progress $FINAL_BACKUP_DIR"$DATABASE".sql.gz
fi
set +o pipefail
fi
if [ $ENABLE_CUSTOM_BACKUPS = "yes" ]
then
echo "Custom backup of $DATABASE"
if ! pg_dump -Fc -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" -f $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress; then
echo "[!!ERROR!!] Failed to produce custom backup database $DATABASE" 1>&2
else
mv $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress $FINAL_BACKUP_DIR"$DATABASE".custom
fi
fi
done
echo -e "\nAll database backups complete!"