initial commit of containerised MariaDB backup functionality
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pgdbbackup
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pgdbbackup
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#!/bin/bash
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#
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# This script dumps the osl db on new.egressive.com
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# and pipes the results into an appropriately named/dated
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# file...
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#
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# The following options must be specified in .conf files
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# in a directory designated with the -c switch.
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#
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# # backup directory
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# BU_DIR=/storage/warhol/pgsql/daily
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# # the database details
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# SERVER=localhost
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# USER=root
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# PASSWORD=
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# # names of the databases to backup
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# DBS="osl osltest egressive seradigm egressive_accounts"
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# # email address to send reports to, and subject
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# EMAIL=dlane@egressive.com
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# EMAIL_SUBJ="Postgres daily OSL Backup Report"
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# # backup identifier
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# BU_IDENT=daily
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# # number of backups for each db to keep
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# BU_TO_KEEP=7
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# # output for debugging...
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VERBOSE=0
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#
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# Stuff that should be universal for this install...
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# where we can find this app...
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MAIN_DIR=/etc/pgdbbackup
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# determine today's date
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DATE=`date '+%Y-%m-%d-%a'`
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# determine today's date
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TIME=`date '+%H-%M-%S'`
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# temporary holding point for email
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TMP_EMAIL=/tmp/tmp_pgdbbackup_email.$DATE_$TIME
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# log file
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LOG=/var/log/epgdbbackup.log
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#
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# Commands
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# gzip command
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GZIP=`which gzip`
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# grep command
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GREP=`which grep`
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# email program
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MAIL=`which mail`
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# database dump utility
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PGDUMP=`which pg_dump`
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DEF_ARGS="-C -d -O -x"
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#
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# pattern for "ls" command to build list of
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# pruneable backup files...
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# -1t = 1 column, ordered by time of last mod
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PRUNEABLES_CMD="ls -1t"
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# function to direct a message...
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message() {
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#
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# a timestamp for logging purposes
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TIMESTAMP=`date '+%Y-%m-%d %H:%M.%S'`
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echo "$0: $TIMESTAMP $@" >> $LOG
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if test -f $TMP_EMAIL ; then
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echo "$0: $TIMESTAMP $@" >> $TMP_EMAIL
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fi
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verbose "$TIMESTAMP $@"
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}
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# create the temporary email file
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create_tmp_email() {
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touch $TMP_EMAIL
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if test -f $TMP_EMAIL ; then
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message "created temporary email $TMP_EMAIL"
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else
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message "failed to create temporary email $TMP_EMAIL"
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fi
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}
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# send the contents of the temporary file to the
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# designated report recipient
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send_email_report() {
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if test -f $TMP_EMAIL ; then
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message "sending email report to $EMAIL"
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$MAIL -s "$EMAIL_SUBJ" $EMAIL < $TMP_EMAIL
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rm $TMP_EMAIL
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if test -f $TMP_EMAIL ; then
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message "failed to remove temporary email $TMP_EMAIL"
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else
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message "successfully removed temporary email $TMP_EMAIL"
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fi
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message "email report successfully sent"
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fi
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}
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# insert a blank line into the log and on the console
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insert_blank() {
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echo "" >> $LOG
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verbose ""
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}
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# function to direct a message...
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verbose() {
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if test $VERBOSE = 1 ; then
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echo "$@"
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fi
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}
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#
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# delete old backups
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delete_old() {
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#
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if test -n $BU_FROOT && test -n $BU_TO_KEEP ; then
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# pattern to search for to build the list...
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PATTERN="$BU_DIR/$BU_FROOT-*.*"
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# build the list, with the suffix...
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PRUNEABLES=`$PRUNEABLES_CMD $PATTERN`
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if test "$?" -eq "0" ; then
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message "pruning older files based on $PATTERN.$BU_SUFFIX"
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message "keeping last $BU_TO_KEEP backups"
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#
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# set counter
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NUM=0
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# go through the list of files and remove those we don't want
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for PRUNEABLE in $PRUNEABLES
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do
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NUM=$(($NUM + 1))
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if test $NUM -gt $BU_TO_KEEP ; then
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message "deleting $PRUNEABLE"
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rm $PRUNEABLE 2>&1 > /dev/null
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else
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message "keeping $PRUNEABLE"
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fi
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done
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fi
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else
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message "keeping older backups, missing backup_root_filename..."
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fi
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}
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#
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# cycle through the command line options
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while test $# -ne 0 ; do
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case $1 in
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--config|-c)
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shift # shift from the flag to the value
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verbose "setting configuration directory to $1"
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BU_CONFDIR=$1
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;;
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esac
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shift
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done
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#
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#
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# create the blank email report
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create_tmp_email
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#
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# run through the various configuration files
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message "looking for configuration files in $BU_CONFDIR"
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if test -d $MAIN_DIR/$BU_CONFDIR ; then
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CONFS=`ls -1 $MAIN_DIR/$BU_CONFDIR/*.conf`
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message "found these config files: $CONFS"
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for CONF in $CONFS
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do
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if test -f $CONF ; then
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message "processing $CONF configuration file"
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# source the configuration file
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source $CONF
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# go to the backup directory
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cd $BU_DIR
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# set up database access info
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export PGUSER=$USER
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export PGPASSWORD=$PASSWORD
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message "starting backup of databases $DBS"
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#
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# dump the database
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for DB in $DBS
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do
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# a timestamp for logging purposes
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STAMP=`date '+%Y-%m-%d_%H-%M-%S'`
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# create a root filename
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BU_FROOT=$DB-$BU_IDENT
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# delete stale backups
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delete_old
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# generate the filename
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FILENAME=$BU_FROOT-$STAMP.sql
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message "backing up database '$DB' into file $FILENAME"
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# dump the data into the file
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$PGDUMP $DEF_ARGS -h $SERVER -f $FILENAME $DB
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message "completed backup of '$DB'"
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# compress the backup
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message "compressing $FILENAME"
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$GZIP $FILENAME
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# vaccuum the database
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done
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message "completed backup of databases: $DBS"
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# return to where you started from...
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cd $OLDPWD
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fi
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done
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message "read config files in $BU_CONF directory"
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else
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message "config directory $BU_CONF doesn't exist!"
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exit 1
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fi
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# sent resulting email report
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send_email_report
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exit 0
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