docker-compose-dbbackup/pgdbbackup

200 lines
5.2 KiB
Bash

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