Scripts to backup PostgreSQL from https://wiki.postgresql.org/wiki/Automated_Backup_on_Linux

postgresql_backup/pg_backup.config

+##############################
+## POSTGRESQL BACKUP CONFIG ##
+##############################
+
+# Optional system user to run backups as.  If the user the script is running as doesn't match this
+# the script terminates.  Leave blank to skip check.
+BACKUP_USER=
+
+# Optional hostname to adhere to pg_hba policies.  Will default to "localhost" if none specified.
+HOSTNAME=
+
+# Optional username to connect to database as.  Will default to "postgres" if none specified.
+USERNAME=
+
+# This dir will be created if it doesn't exist.  This must be writable by the user the script is
+# running as.
+BACKUP_DIR=/home/backups/database/postgresql/
+
+# List of strings to match against in database name, separated by space or comma, for which we only
+# wish to keep a backup of the schema, not the data. Any database names which contain any of these
+# values will be considered candidates. (e.g. "system_log" will match "dev_system_log_2010-01")
+SCHEMA_ONLY_LIST=""
+
+# Will produce a custom-format backup if set to "yes"
+ENABLE_CUSTOM_BACKUPS=yes
+
+# Will produce a gzipped plain-format backup if set to "yes"
+ENABLE_PLAIN_BACKUPS=yes
+
+
+#### SETTINGS FOR ROTATED BACKUPS ####
+
+# Which day to take the weekly backup from (1-7 = Monday-Sunday)
+DAY_OF_WEEK_TO_KEEP=5
+
+# Number of days to keep daily backups
+DAYS_TO_KEEP=7
+
+# How many weeks to keep weekly backups
+WEEKS_TO_KEEP=5
+
+######################################
\ No newline at end of file

postgresql_backup/pg_backup.sh

+#!/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;
+
+
+###########################
+### 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 $DATABASE"
+
+    if ! pg_dump -Fp -s -h "$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
+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 $DATABASE"
+
+        if ! pg_dump -Fp -h "$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
+    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!"
\ No newline at end of file

postgresql_backup/pg_backup_rotated.sh

+#!/bin/bash
+
+###########################
+####### LOAD CONFIG #######
+###########################
+
+while [ $# -gt 0 ]; do
+        case $1 in
+                -c)
+                        CONFIG_FILE_PATH="$2"
+                        shift 2
+                        ;;
+                *)
+                        ${ECHO} "Unknown Option \"$1\"" 1>&2
+                        exit 2
+                        ;;
+        esac
+done
+
+if [ -z $CONFIG_FILE_PATH ] ; then
+        SCRIPTPATH=$(cd ${0%/*} && pwd -P)
+        CONFIG_FILE_PATH="${SCRIPTPATH}/pg_backup.config"
+fi
+
+if [ ! -r ${CONFIG_FILE_PATH} ] ; then
+        echo "Could not load config file from ${CONFIG_FILE_PATH}" 1>&2
+        exit 1
+fi
+
+source "${CONFIG_FILE_PATH}"
+
+###########################
+#### 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 ####
+###########################
+
+function perform_backups()
+{
+    SUFFIX=$1
+    FINAL_BACKUP_DIR=$BACKUP_DIR"`date +\%Y-\%m-\%d`$SUFFIX/"
+
+    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;
+
+
+    ###########################
+    ### 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 $DATABASE"
+
+            if ! pg_dump -Fp -s -h "$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
+    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 $DATABASE"
+
+            if ! pg_dump -Fp -h "$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
+        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"
+            else
+                mv $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress $FINAL_BACKUP_DIR"$DATABASE".custom
+            fi
+        fi
+
+    done
+
+    echo -e "\nAll database backups complete!"
+}
+
+# MONTHLY BACKUPS
+
+DAY_OF_MONTH=`date +%d`
+
+if [ $DAY_OF_MONTH -eq 1 ];
+then
+    # Delete all expired monthly directories
+    find $BACKUP_DIR -maxdepth 1 -name "*-monthly" -exec rm -rf '{}' ';'
+
+    perform_backups "-monthly"
+
+    exit 0;
+fi
+
+# WEEKLY BACKUPS
+
+DAY_OF_WEEK=`date +%u` #1-7 (Monday-Sunday)
+EXPIRED_DAYS=`expr $((($WEEKS_TO_KEEP * 7) + 1))`
+
+if [ $DAY_OF_WEEK = $DAY_OF_WEEK_TO_KEEP ];
+then
+    # Delete all expired weekly directories
+    find $BACKUP_DIR -maxdepth 1 -mtime +$EXPIRED_DAYS -name "*-weekly" -exec rm -rf '{}' ';'
+
+    perform_backups "-weekly"
+
+    exit 0;
+fi
+
+# DAILY BACKUPS
+
+# Delete daily backups 7 days old or more
+find $BACKUP_DIR -maxdepth 1 -mtime +$DAYS_TO_KEEP -name "*-daily" -exec rm -rf '{}' ';'
+
+perform_backups "-daily"
\ No newline at end of file