commit a5d72192b446e1e33d990a0e1f952dded95f2305 Author: Dave Lane Date: Thu Feb 8 16:42:39 2018 +1300 initial commit of backup script diff --git a/dbbackup-docker-compose b/dbbackup-docker-compose new file mode 100755 index 0000000..9e58541 --- /dev/null +++ b/dbbackup-docker-compose @@ -0,0 +1,229 @@ +#!/bin/bash +# +# This script dumps the PostgreSQL db in a Docker container +# managed by Docker Compose using the selected command within +# the database container and pipes the results into an +# appropriately named/dated file... +# +# It also manages rolling out older backups to avoid filling +# your storage... +# +# Default retention +BU_TO_KEEP_HOURLY=24 +BU_TO_KEEP_DAILY=7 +BU_TO_KEEP_WEEKLY=4 +BU_TO_KEEP_MONTHLY=12 +BU_TO_KEEP_YEARLY=7 +# +BU_FROOT=alldbs +BU_FROOT_HOURLY=hourly +BU_FROOT_DAILY=daily +BU_FROOT_WEEKLY=weekly +BU_FROOT_MONTHLY=monthly +BU_FROOT_YEARLY=yearly +# +# this can be overridden at invocation +BU_CONF=default-docker-compose.conf +# # output for debugging... +VERBOSE=1 +# +# Stuff that should be universal for this install... +# where we can find this app... +MAIN_DIR=/etc/dbbackup +# 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_dbbackup_email.$DATE_$TIME +# log file +LOG=/var/log/dbbackup.log +# +# Commands +# gzip command +GZIP=`which gzip` +# grep command +GREP=`which grep` +# email program +MAIL=`which mail` +# database dump utility +DC=`which docker-compose` +#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 +} +# +# +do_backup() { + FILE=$1 + VER=`$DC exec $DC_CONTAINER pg_config --version` + verbose "Postgres version $VER - echoing to backup: $FILE" + echo "--" > $FILE + echo "-- PostgreSQL Version: $VER" >> $FILE + echo "--" >> $FILE + echo "" >> $FILE + CMD="$DC exec $DC_CONTAINER $DUMP_CMD" + verbose "doing database dump: $CMD" + $CMD >> $FILE +} + +# +# 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_CONF=$1 + ;; + --hourly|-h) + verbose "running hourly backup" + TASK=HOURLY + ;; + --daily|-d) + verbose "running daily backup" + TASK=DAILY + ;; + --weekly|-w) + verbose "running weekly backup" + TASK=WEEKLY + ;; + --monthly|-m) + verbose "running monthly backup" + TASK=MONTHLY + ;; + --yearly|-y) + verbose "running yearly backup" + TASK=YEARLY + ;; + esac + shift +done +# +# +# create the blank email report +#create_tmp_email +# +if test -f $BU_CONF ; then + verbose "Reading default in $BU_CONF" + source $BU_CONF +else + error "Couldn't find or read $BU_CONF" + exit 1 +fi +# +# run through the various tasks +verbose "using configuration file $BU_CONF" +# go to the Docker Compose directory where we need to be to run the +# docker-compose commands +verbose "going to $DC_DIR" +OLD_DIR=`pwd` +cd $DC_DIR +# +# run the backup... +# +# a timestamp for logging purposes +STAMP=`date '+%Y-%m-%d_%H-%M-%S'` +# delete stale backups +# +# delete_old +# +# generate the filename +INC="BU_FROOT_$TASK" +FILENAME=$BU_FROOT-${!INC}-$STAMP.sql +FILEPATH=$BU_DIR/$FILENAME +message "backing up all the databases into $FILEPATH" +# dump the data into the file +# +do_backup $FILEPATH +# +message "completed backup" +# compress the backup +message "compressing $FILEPATH" +$GZIP $BU_DIR/$FILEPATH +# return to where you started from... +cd $OLD_DIR +# +# sent resulting email report +# +#send_email_report +exit 0 diff --git a/default-docker-compose.conf b/default-docker-compose.conf new file mode 100644 index 0000000..755faa6 --- /dev/null +++ b/default-docker-compose.conf @@ -0,0 +1,19 @@ +# +# SQL dump backup directory +# +BU_DIR=/home/data/mastodon/backup +# +# Docker Compose details +# +# dir containing the docker-compose.yml +DC_DIR=/home/docker/mastodon-2.0.0 +# name of the database container +DC_CONTAINER=postgres +# Command to dump the relevant database(s) +DUMP_CMD='pg_dumpall -c -U postgres' +# +# Reporting +# +# email address to send reports to, and subject +EMAIL=webmaster@oerfoundation.org +EMAIL_SUBJ="Mastodon (on Open) Postgres Backup Report"