initial commit of backup script
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229
dbbackup-docker-compose
Executable file
229
dbbackup-docker-compose
Executable file
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#!/bin/bash
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#
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# This script dumps the PostgreSQL db in a Docker container
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# managed by Docker Compose using the selected command within
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# the database container and pipes the results into an
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# appropriately named/dated file...
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#
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# It also manages rolling out older backups to avoid filling
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# your storage...
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#
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# Default retention
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BU_TO_KEEP_HOURLY=24
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BU_TO_KEEP_DAILY=7
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BU_TO_KEEP_WEEKLY=4
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BU_TO_KEEP_MONTHLY=12
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BU_TO_KEEP_YEARLY=7
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#
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BU_FROOT=alldbs
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BU_FROOT_HOURLY=hourly
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BU_FROOT_DAILY=daily
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BU_FROOT_WEEKLY=weekly
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BU_FROOT_MONTHLY=monthly
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BU_FROOT_YEARLY=yearly
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#
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# this can be overridden at invocation
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BU_CONF=default-docker-compose.conf
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# # output for debugging...
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VERBOSE=1
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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/dbbackup
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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_dbbackup_email.$DATE_$TIME
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# log file
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LOG=/var/log/dbbackup.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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DC=`which docker-compose`
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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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#
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do_backup() {
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FILE=$1
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VER=`$DC exec $DC_CONTAINER pg_config --version`
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verbose "Postgres version $VER - echoing to backup: $FILE"
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echo "--" > $FILE
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echo "-- PostgreSQL Version: $VER" >> $FILE
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echo "--" >> $FILE
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echo "" >> $FILE
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CMD="$DC exec $DC_CONTAINER $DUMP_CMD"
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verbose "doing database dump: $CMD"
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$CMD >> $FILE
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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_CONF=$1
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;;
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--hourly|-h)
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verbose "running hourly backup"
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TASK=HOURLY
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;;
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--daily|-d)
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verbose "running daily backup"
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TASK=DAILY
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;;
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--weekly|-w)
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verbose "running weekly backup"
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TASK=WEEKLY
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;;
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--monthly|-m)
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verbose "running monthly backup"
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TASK=MONTHLY
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;;
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--yearly|-y)
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verbose "running yearly backup"
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TASK=YEARLY
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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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if test -f $BU_CONF ; then
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verbose "Reading default in $BU_CONF"
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source $BU_CONF
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else
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error "Couldn't find or read $BU_CONF"
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exit 1
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fi
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#
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# run through the various tasks
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verbose "using configuration file $BU_CONF"
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# go to the Docker Compose directory where we need to be to run the
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# docker-compose commands
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verbose "going to $DC_DIR"
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OLD_DIR=`pwd`
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cd $DC_DIR
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#
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# run the backup...
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#
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# a timestamp for logging purposes
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STAMP=`date '+%Y-%m-%d_%H-%M-%S'`
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# delete stale backups
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#
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# delete_old
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#
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# generate the filename
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INC="BU_FROOT_$TASK"
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FILENAME=$BU_FROOT-${!INC}-$STAMP.sql
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FILEPATH=$BU_DIR/$FILENAME
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message "backing up all the databases into $FILEPATH"
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# dump the data into the file
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#
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do_backup $FILEPATH
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#
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message "completed backup"
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# compress the backup
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message "compressing $FILEPATH"
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$GZIP $BU_DIR/$FILEPATH
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# return to where you started from...
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cd $OLD_DIR
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#
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# sent resulting email report
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#
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#send_email_report
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exit 0
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19
default-docker-compose.conf
Normal file
19
default-docker-compose.conf
Normal file
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@ -0,0 +1,19 @@
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#
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# SQL dump backup directory
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#
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BU_DIR=/home/data/mastodon/backup
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#
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# Docker Compose details
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#
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# dir containing the docker-compose.yml
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DC_DIR=/home/docker/mastodon-2.0.0
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# name of the database container
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DC_CONTAINER=postgres
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# Command to dump the relevant database(s)
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DUMP_CMD='pg_dumpall -c -U postgres'
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#
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# Reporting
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#
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# email address to send reports to, and subject
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EMAIL=webmaster@oerfoundation.org
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EMAIL_SUBJ="Mastodon (on Open) Postgres Backup Report"
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