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Auto PostgreSQL backup script.
#!/bin/bash
#
# PostgreSQL Backup Script Ver 1.0
# http://autopgsqlbackup.frozenpc.net
# Copyright (c) 2005 Aaron Axelsen <axelseaa@amadmax.com>
#
# This script is based of the AutoMySQLBackup Script Ver 2.2
# It can be found at http://sourceforge.net/projects/automysqlbackup/
#
# The PostgreSQL changes are based on a patch agaisnt AutoMySQLBackup 1.9
# created by Friedrich Lobenstock <fl@fl.priv.at>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#=====================================================================
# Set the following variables to your system needs
# (Detailed instructions below variables)
#=====================================================================
# Username to access the PostgreSQL server e.g. dbuser
USERNAME=postgres
# Password
# create a file $HOME/.pgpass containing a line like this
# hostname:*:*:dbuser:dbpass
# replace hostname with the value of DBHOST and postgres with
# the value of USERNAME
# Host name (or IP address) of PostgreSQL server e.g localhost
DBHOST=localhost
# List of DBNAMES for Daily/Weekly Backup e.g. "DB1 DB2 DB3"
DBNAMES="all"
# Backup directory location e.g /backups
BACKUPDIR="/var/backups/postgres"
# Mail setup
# What would you like to be mailed to you?
# - log : send only log file
# - files : send log file and sql files as attachments (see docs)
# - stdout : will simply output the log to the screen if run manually.
MAILCONTENT="log"
# Set the maximum allowed email size in k. (4000 = approx 5MB email [see docs])
MAXATTSIZE="4000"
# Email Address to send mail to? (user@domain.com)
MAILADDR="root@localhost"
# ============================================================
# === ADVANCED OPTIONS ( Read the doc's below for details )===
#=============================================================
# List of DBBNAMES for Monthly Backups.
MDBNAMES="template1 $DBNAMES"
# List of DBNAMES to EXLUCDE if DBNAMES are set to all (must be in " quotes)
DBEXCLUDE=""
# Include CREATE DATABASE in backup?
CREATE_DATABASE=yes
# Separate backup directory and file for each DB? (yes or no)
SEPDIR=yes
# Which day do you want weekly backups? (1 to 7 where 1 is Monday)
DOWEEKLY=6
# Choose Compression type. (gzip or bzip2)
COMP=bzip2
# Command to run before backups (uncomment to use)
#PREBACKUP="/etc/pgsql-backup-pre"
# Command run after backups (uncomment to use)
#POSTBACKUP="bash /home/backups/scripts/ftp_pgsql"
#=====================================================================
# Options documentation
#=====================================================================
# Set USERNAME and PASSWORD of a user that has at least SELECT permission
# to ALL databases.
#
# Set the DBHOST option to the server you wish to backup, leave the
# default to backup "this server".(to backup multiple servers make
# copies of this file and set the options for that server)
#
# Put in the list of DBNAMES(Databases)to be backed up. If you would like
# to backup ALL DBs on the server set DBNAMES="all".(if set to "all" then
# any new DBs will automatically be backed up without needing to modify
# this backup script when a new DB is created).
#
# If the DB you want to backup has a space in the name replace the space
# with a % e.g. "data base" will become "data%base"
# NOTE: Spaces in DB names may not work correctly when SEPDIR=no.
#
# You can change the backup storage location from /backups to anything
# you like by using the BACKUPDIR setting..
#
# The MAILCONTENT and MAILADDR options and pretty self explanitory, use
# these to have the backup log mailed to you at any email address or multiple
# email addresses in a space seperated list.
# (If you set mail content to "log" you will require access to the "mail" program
# on your server. If you set this to "files" you will have to have mutt installed
# on your server. If you set it sto stdout it will log to the screen if run from
# the console or to the cron job owner if run through cron)
#
# MAXATTSIZE sets the largest allowed email attachments total (all backup files) you
# want the script to send. This is the size before it is encoded to be sent as an email
# so if your mail server will allow a maximum mail size of 5MB I would suggest setting
# MAXATTSIZE to be 25% smaller than that so a setting of 4000 would probably be fine.
#
# Finally copy automysqlbackup.sh to anywhere on your server and make sure
# to set executable permission. You can also copy the script to
# /etc/cron.daily to have it execute automatically every night or simply
# place a symlink in /etc/cron.daily to the file if you wish to keep it
# somwhere else.
# NOTE:On Debian copy the file with no extention for it to be run
# by cron e.g just name the file "automysqlbackup"
#
# Thats it..
#
#
# === Advanced options doc's ===
#
# The list of MDBNAMES is the DB's to be backed up only monthly. You should
# always include "mysql" in this list to backup your user/password
# information along with any other DBs that you only feel need to
# be backed up monthly. (if using a hosted server then you should
# probably remove "mysql" as your provider will be backing this up)
# NOTE: If DBNAMES="all" then MDBNAMES has no effect as all DBs will be backed
# up anyway.
#
# If you set DBNAMES="all" you can configure the option DBEXCLUDE. Other
# wise this option will not be used.
# This option can be used if you want to backup all dbs, but you want
# exclude some of them. (eg. a db is to big).
#
# Set CREATE_DATABASE to "yes" (the default) if you want your SQL-Dump to create
# a database with the same name as the original database when restoring.
# Saying "no" here will allow your to specify the database name you want to
# restore your dump into, making a copy of the database by using the dump
# created with automysqlbackup.
# NOTE: Not used if SEPDIR=no
#
# The SEPDIR option allows you to choose to have all DBs backed up to
# a single file (fast restore of entire server in case of crash) or to
# seperate directories for each DB (each DB can be restored seperately
# in case of single DB corruption or loss).
#
# To set the day of the week that you would like the weekly backup to happen
# set the DOWEEKLY setting, this can be a value from 1 to 7 where 1 is Monday,
# The default is 6 which means that weekly backups are done on a Saturday.
#
# COMP is used to choose the copmression used, options are gzip or bzip2.
# bzip2 will produce slightly smaller files but is more processor intensive so
# may take longer to complete.
#
# Use PREBACKUP and POSTBACKUP to specify Per and Post backup commands
# or scripts to perform tasks either before or after the backup process.
#
#
#=====================================================================
# Backup Rotation..
#=====================================================================
#
# Daily Backups are rotated weekly..
# Weekly Backups are run by default on Saturday Morning when
# cron.daily scripts are run...Can be changed with DOWEEKLY setting..
# Weekly Backups are rotated on a 5 week cycle..
# Monthly Backups are run on the 1st of the month..
# Monthly Backups are NOT rotated automatically...
# It may be a good idea to copy Monthly backups offline or to another
# server..
#
#=====================================================================
# Please Note!!
#=====================================================================
#
# I take no resposibility for any data loss or corruption when using
# this script..
# This script will not help in the event of a hard drive crash. If a
# copy of the backup has not be stored offline or on another PC..
# You should copy your backups offline regularly for best protection.
#
# Happy backing up...
#
#=====================================================================
# Change Log
#=====================================================================
#
# VER 1.0 - (2005-03-25)
# Initial Release - based on AutoMySQLBackup 2.2
#
#=====================================================================
#=====================================================================
#
# Should not need to be modified from here down!!
#
#=====================================================================
#=====================================================================
PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/postgres/bin:/usr/local/pgsql/bin
DATE=`date +%Y-%m-%d` # Datestamp e.g 2002-09-21
DOW=`date +%A` # Day of the week e.g. Monday
DNOW=`date +%u` # Day number of the week 1 to 7 where 1 represents Monday
DOM=`date +%d` # Date of the Month e.g. 27
M=`date +%B` # Month e.g January
W=`date +%V` # Week Number e.g 37
VER=1.0 # Version Number
LOGFILE=$BACKUPDIR/$DBHOST-`date +%N`.log # Logfile Name
OPT="" # OPT string for use with mysqldump ( see man mysqldump )
BACKUPFILES="" # thh: added for later mailing
# Create required directories
if [ ! -e "$BACKUPDIR" ] # Check Backup Directory exists.
then
mkdir -p "$BACKUPDIR"
fi
if [ ! -e "$BACKUPDIR/daily" ] # Check Daily Directory exists.
then
mkdir -p "$BACKUPDIR/daily"
fi
if [ ! -e "$BACKUPDIR/weekly" ] # Check Weekly Directory exists.
then
mkdir -p "$BACKUPDIR/weekly"
fi
if [ ! -e "$BACKUPDIR/monthly" ] # Check Monthly Directory exists.
then
mkdir -p "$BACKUPDIR/monthly"
fi
# IO redirection for logging.
touch $LOGFILE
exec 6>&1 # Link file descriptor #6 with stdout.
# Saves stdout.
exec > $LOGFILE # stdout replaced with file $LOGFILE.
# Functions
# Database dump function
dbdump () {
pg_dump --username=$USERNAME $HOST $OPT $1 > $2
return 0
}
# Compression function
SUFFIX=""
compression () {
if [ "$COMP" = "gzip" ]; then
gzip -f "$1"
echo
echo Backup Information for "$1"
gzip -l "$1.gz"
SUFFIX=".gz"
elif [ "$COMP" = "bzip2" ]; then
echo Compression information for "$1.bz2"
bzip2 -f -v $1 2>&1
SUFFIX=".bz2"
else
echo "No compression option set, check advanced settings"
fi
return 0
}
# Run command before we begin
if [ "$PREBACKUP" ]
then
echo ======================================================================
echo "Prebackup command output."
echo
eval $PREBACKUP
echo
echo ======================================================================
echo
fi
if [ "$SEPDIR" = "yes" ]; then # Check if CREATE DATABSE should be included in Dump
if [ "$CREATE_DATABASE" = "no" ]; then
OPT="$OPT"
else
OPT="$OPT --create"
fi
else
OPT="$OPT"
fi
# Hostname for LOG information
if [ "$DBHOST" = "localhost" ]; then
DBHOST="`hostname -f`"
HOST=""
else
HOST="-h $DBHOST"
fi
# If backing up all DBs on the server
if [ "$DBNAMES" = "all" ]; then
DBNAMES="`psql -U $USERNAME $HOST -l -A -F: | sed -ne "/:/ { /Name:Owner/d; /template0/d; s/:.*$//; p }"`"
# If DBs are excluded
for exclude in $DBEXCLUDE
do
DBNAMES=`echo $DBNAMES | sed "s/\b$exclude\b//g"`
done
MDBNAMES=$DBNAMES
fi
echo ======================================================================
echo AutoPostgreSQLBackup VER $VER
echo http://autopgsqlbackup.frozenpc.net/
echo
echo Backup of Database Server - $DBHOST
echo ======================================================================
# Test is seperate DB backups are required
if [ "$SEPDIR" = "yes" ]; then
echo Backup Start Time `date`
echo ======================================================================
# Monthly Full Backup of all Databases
if [ $DOM = "01" ]; then
for MDB in $MDBNAMES
do
# Prepare $DB for using
MDB="`echo $MDB | sed 's/%/ /g'`"
if [ ! -e "$BACKUPDIR/monthly/$MDB" ] # Check Monthly DB Directory exists.
then
mkdir -p "$BACKUPDIR/monthly/$MDB"
fi
echo Monthly Backup of $MDB...
dbdump "$MDB" "$BACKUPDIR/monthly/$MDB/${MDB}_$DATE.$M.$MDB.sql"
compression "$BACKUPDIR/monthly/$MDB/${MDB}_$DATE.$M.$MDB.sql"
BACKUPFILES="$BACKUPFILES $BACKUPDIR/monthly/$MDB/${MDB}_$DATE.$M.$MDB.sql$SUFFIX"
echo ----------------------------------------------------------------------
done
fi
for DB in $DBNAMES
do
# Prepare $DB for using
DB="`echo $DB | sed 's/%/ /g'`"
# Create Separate directory for each DB
if [ ! -e "$BACKUPDIR/daily/$DB" ] # Check Daily DB Directory exists.
then
mkdir -p "$BACKUPDIR/daily/$DB"
fi
if [ ! -e "$BACKUPDIR/weekly/$DB" ] # Check Weekly DB Directory exists.
then
mkdir -p "$BACKUPDIR/weekly/$DB"
fi
# Weekly Backup
if [ $DNOW = $DOWEEKLY ]; then
echo Weekly Backup of Database \( $DB \)
echo Rotating 5 weeks Backups...
if [ "$W" -le 05 ];then
REMW=`expr 48 + $W`
elif [ "$W" -lt 15 ];then
REMW=0`expr $W - 5`
else
REMW=`expr $W - 5`
fi
eval rm -fv "$BACKUPDIR/weekly/$DB/week.$REMW.*"
echo
dbdump "$DB" "$BACKUPDIR/weekly/$DB/${DB}_week.$W.$DATE.sql"
compression "$BACKUPDIR/weekly/$DB/${DB}_week.$W.$DATE.sql"
BACKUPFILES="$BACKUPFILES $BACKUPDIR/weekly/$DB/${DB}_week.$W.$DATE.sql$SUFFIX"
echo ----------------------------------------------------------------------
# Daily Backup
else
echo Daily Backup of Database \( $DB \)
echo Rotating last weeks Backup...
eval rm -fv "$BACKUPDIR/daily/$DB/*.$DOW.sql.*"
echo
dbdump "$DB" "$BACKUPDIR/daily/$DB/${DB}_$DATE.$DOW.sql"
compression "$BACKUPDIR/daily/$DB/${DB}_$DATE.$DOW.sql"
BACKUPFILES="$BACKUPFILES $BACKUPDIR/daily/$DB/${DB}_$DATE.$DOW.sql$SUFFIX"
echo ----------------------------------------------------------------------
fi
done
echo Backup End `date`
echo ======================================================================
else # One backup file for all DBs
echo Backup Start `date`
echo ======================================================================
# Monthly Full Backup of all Databases
if [ $DOM = "01" ]; then
echo Monthly full Backup of \( $MDBNAMES \)...
dbdump "$MDBNAMES" "$BACKUPDIR/monthly/$DATE.$M.all-databases.sql"
compression "$BACKUPDIR/monthly/$DATE.$M.all-databases.sql"
BACKUPFILES="$BACKUPFILES $BACKUPDIR/monthly/$DATE.$M.all-databases.sql$SUFFIX"
echo ----------------------------------------------------------------------
fi
# Weekly Backup
if [ $DNOW = $DOWEEKLY ]; then
echo Weekly Backup of Databases \( $DBNAMES \)
echo
echo Rotating 5 weeks Backups...
if [ "$W" -le 05 ];then
REMW=`expr 48 + $W`
elif [ "$W" -lt 15 ];then
REMW=0`expr $W - 5`
else
REMW=`expr $W - 5`
fi
eval rm -fv "$BACKUPDIR/weekly/week.$REMW.*"
echo
dbdump "$DBNAMES" "$BACKUPDIR/weekly/week.$W.$DATE.sql"
compression "$BACKUPDIR/weekly/week.$W.$DATE.sql"
BACKUPFILES="$BACKUPFILES $BACKUPDIR/weekly/week.$W.$DATE.sql$SUFFIX"
echo ----------------------------------------------------------------------
# Daily Backup
else
echo Daily Backup of Databases \( $DBNAMES \)
echo
echo Rotating last weeks Backup...
eval rm -fv "$BACKUPDIR/daily/*.$DOW.sql.*"
echo
dbdump "$DBNAMES" "$BACKUPDIR/daily/$DATE.$DOW.sql"
compression "$BACKUPDIR/daily/$DATE.$DOW.sql"
BACKUPFILES="$BACKUPFILES $BACKUPDIR/daily/$DATE.$DOW.sql$SUFFIX"
echo ----------------------------------------------------------------------
fi
echo Backup End Time `date`
echo ======================================================================
fi
echo Total disk space used for backup storage..
echo Size - Location
echo `du -hs "$BACKUPDIR"`
echo
# Run command when we're done
if [ "$POSTBACKUP" ]
then
echo ======================================================================
echo "Postbackup command output."
echo
eval $POSTBACKUP
echo
echo ======================================================================
fi
#Clean up IO redirection
exec 1>&6 6>&- # Restore stdout and close file descriptor #6.
if [ "$MAILCONTENT" = "files" ]
then
#Get backup size
ATTSIZE=`du -c $BACKUPFILES | grep "[[:digit:][:space:]]total$" |sed s/\s*total//`
if [ $MAXATTSIZE -ge $ATTSIZE ]
then
BACKUPFILES=`echo "$BACKUPFILES" | sed -e "s# # -a #g"` #enable multiple attachments
mutt -s "PostgreSQL Backup Log and SQL Files for $DBHOST - $DATE" $BACKUPFILES $MAILADDR < $LOGFILE #send via mutt
else
cat "$LOGFILE" | mail -s "WARNING! - PostgreSQL Backup exceeds set maximum attachment size on $HOST - $DATE" $MAILADDR
fi
elif [ "$MAILCONTENT" = "log" ]
then
cat "$LOGFILE" | mail -s "PostgreSQL Backup Log for $DBHOST - $DATE" $MAILADDR
else
cat "$LOGFILE"
fi
# Clean up Logfile
eval rm -f "$LOGFILE"
exit 0
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