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automysqlbackup
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#!/usr/bin/env bash
#
# 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
#
shopt -s extglob
# BEGIN _flags
let "filename_flag_encrypted=0x01"
let "filename_flag_gz=0x02"
let "filename_flag_bz2=0x04"
let "filename_flag_diff=0x08"
# END _flags
# BEGIN _errors_notifications
let "E=0x00" # no errors
let "N=0x00" # no notifications
let "E_dbdump_failed=0x01"
let "E_backup_local_failed=0x02"
let "E_mkdir_basedir_failed=0x04"
let "E_mkdir_subdirs_failed=0x08"
let "E_perm_basedir=0x10"
let "E_enc_cleartext_delfailed=0x20"
let "E_enc_failed=0x40"
let "E_db_empty=0x80"
let "E_create_pipe_failed=0x100"
let "E_missing_deps=0x200"
let "E_no_basedir=0x400"
let "E_config_backupdir_not_writable=0x800"
let "E_dump_status_failed=0x1000"
let "E_dump_fullschema_failed=0x2000"
let "N_config_file_missing=0x01"
let "N_arg_conffile_parsed=0x02"
let "N_arg_conffile_unreadable=0x04"
let "N_too_many_args=0x08"
let "N_latest_cleanup_failed=0x10"
let "N_backup_local_nofiles=0x20"
# END _errors_notifications
# BEGIN _functions
# @info: Default configuration options.
# @deps: (none)
load_default_config() {
CONFIG_configfile="/etc/automysqlbackup/automysqlbackup.conf"
CONFIG_backup_dir='/var/backup/db'
CONFIG_multicore='yes'
CONFIG_multicore_threads=2
CONFIG_do_monthly="01"
CONFIG_do_weekly="5"
CONFIG_rotation_daily=6
CONFIG_rotation_weekly=35
CONFIG_rotation_monthly=150
CONFIG_mysql_dump_port=3306
CONFIG_mysql_dump_usessl='yes'
CONFIG_mysql_dump_use_mycnf_for_userpass='yes'
CONFIG_mysql_dump_username='root'
CONFIG_mysql_dump_password=''
CONFIG_mysql_dump_host='localhost'
CONFIG_mysql_dump_host_friendly=''
CONFIG_mysql_dump_socket=''
CONFIG_mysql_dump_create_database='no'
CONFIG_mysql_dump_use_separate_dirs='yes'
CONFIG_mysql_dump_compression='gzip'
CONFIG_mysql_dump_commcomp='no'
CONFIG_mysql_dump_latest='no'
CONFIG_mysql_dump_latest_clean_filenames='no'
CONFIG_mysql_dump_max_allowed_packet=''
CONFIG_mysql_dump_single_transaction='no'
CONFIG_mysql_dump_master_data=
CONFIG_mysql_dump_full_schema='yes'
CONFIG_mysql_dump_dbstatus='yes'
CONFIG_mysql_dump_differential='no'
CONFIG_backup_local_files=()
CONFIG_db_names=()
CONFIG_db_month_names=()
CONFIG_db_exclude=( 'information_schema' )
CONFIG_table_exclude=()
CONFIG_mailcontent='stdout'
CONFIG_mail_maxattsize=4000
CONFIG_mail_splitandtar='yes'
CONFIG_mail_use_uuencoded_attachments='no'
CONFIG_mail_address='root'
CONFIG_encrypt='no'
CONFIG_encrypt_password='password0123'
}
# @return: true, if variable is set; else false
isSet() {
if [[ ! ${!1} && ${!1-_} ]]; then return 1; else return 0; fi
}
# @return: true, if variable is empty; else false
isEmpty() {
if [[ ${!1} ]]; then return 1; else return 0; fi
}
# @info: Called when one of the signals EXIT, SIGHUP, SIGINT, SIGQUIT or SIGTERM is emitted.
# It removes the IO redirection, mails any log file information and cleans up any temporary files.
# @args: (none)
# @return: (none)
mail_cleanup () {
removeIO
# if the variables $log_file and $log_errfile aren't set or are empty and both associated files don't exist, skip output methods.
# this might happen if 'exit' occurs before they are set.
if [[ ! -e "$log_file" && ! -e "$log_errfile" ]];then
echo "Skipping normal output methods, since the program exited before any log files could be created."
else
case "${CONFIG_mailcontent}" in
'files')
# Include error log if larger than zero.
if [[ -s "$log_errfile" ]]; then
backupfiles=( "${backupfiles[@]}" "$log_errfile" )
errornote="WARNING: Error Reported - "
fi
temp="$(mktemp "$CONFIG_backup_dir"/tmp/mail_content.XXXXXX)"
# Get backup size
attsize=`du -c "${backupfiles[@]}" | awk 'END {print $1}'`
if (( ${CONFIG_mail_maxattsize} >= ${attsize} )); then
if [[ "x$CONFIG_mail_use_uuencoded_attachments" = "xyes" ]]; then
cat "$log_file" > "$temp"
for j in "${backupfiles[@]}"; do
uuencode "$j" "$j" >> "$temp"
done
mail -s "${errornote} MySQL Backup Log and SQL Files for ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}" ${CONFIG_mail_address} < "$temp"
else
mutt -s "${errornote} MySQL Backup Log and SQL Files for ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}" -a "${backupfiles[@]}" -- ${CONFIG_mail_address} < "$log_file"
fi
elif (( ${CONFIG_mail_maxattsize} <= ${attsize} )) && [[ "x$CONFIG_mail_splitandtar" = "xyes" ]]; then
if sPWD="$PWD"; cd "$CONFIG_backup_dir"/tmp && pax -wv "${backupfiles[@]}" | bzip2_compression | split -b $((CONFIG_mail_maxattsize*1000)) - mail_attachment_${datetimestamp}_ && cd "$sPWD"; then
files=("$CONFIG_backup_dir"/tmp/mail_attachment_${datetimestamp}_*)
echo -e "\n\nThe attachments have been split into multiple files.\nUse 'cat mail_attachment_2011-08-13_13h15m_* > mail_attachment_2011-08-13_13h15m.tar.bz2' to combine them and \
'bunzip2 <mail_attachment_2011-08-13_13h15m.tar.bz2 | pax -rv' to extract the content."
for ((j=0;j<"${#files[@]}";j++)); do
if [[ "x$CONFIG_mail_use_uuencoded_attachments" = "xyes" ]]; then
if (( $j = 0 )); then
cat "$log_file" > "$temp"
uuencode "$j" "$j" >> "$temp"
else
uuencode "$j" "$j" > "$temp"
fi
mail -s "${errornote} MySQL Backup Log and SQL Files for ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}" ${CONFIG_mail_address} < "$temp"
else
mutt -s "${errornote} MySQL Backup Log and SQL Files for ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}; Part $((j+1))/${#files[@]}" -a "${files[j]}" -- ${CONFIG_mail_address} < "$log_file"
fi
done
else
cat "$log_file" | mail -s "WARNING! - MySQL Backup exceeds set maximum attachment size on ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}" ${CONFIG_mail_address}
fi
else
cat "$log_file" | mail -s "WARNING! - MySQL Backup exceeds set maximum attachment size on ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}" ${CONFIG_mail_address}
fi
rm "$temp"
;;
'log')
cat "$log_file" | mail -s "MySQL Backup Log for ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}" ${CONFIG_mail_address}
[[ -s "$log_errfile" ]] && cat "$log_errfile" | mail -s "ERRORS REPORTED: MySQL Backup error Log for ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}" ${CONFIG_mail_address}
;;
'quiet')
[[ -s "$log_errfile" ]] && cat "$log_errfile" | mail -s "ERRORS REPORTED: MySQL Backup error Log for ${CONFIG_mysql_dump_host_friendly:-$CONFIG_mysql_dump_host} - ${datetimestamp}" ${CONFIG_mail_address}
;;
*)
if [[ -s "$log_errfile" ]]; then
cat "$log_file"
echo
echo "###### WARNING ######"
echo "Errors reported during AutoMySQLBackup execution.. Backup failed"
echo "Error log below.."
cat "$log_errfile"
else
cat "$log_file"
fi
;;
esac
###################################################################################
# Clean up and finish
[[ -e "$log_file" ]] && rm -f "$log_file"
[[ -e "$log_errfile" ]] && rm -f "$log_errfile"
fi
}
# @params: #month #year
# @deps: (none)
days_of_month() {
m="$1"; y="$2"; a=$(( 30+(m+m/8)%2 ))
(( m==2 )) && a=$((a-2))
(( m==2 && y%4==0 && ( y<100 || y%100>0 || y%400==0) )) && a=$((a+1))
printf '%d' $a
}
# @info: Checks if a folder is writable by creating a temporary file in it and removing it afterwards.
# @args: folder to test
# @return: returns false if creation of temporary file failed or it can't be removed afterwards; else true
# @deps: (none)
chk_folder_writable () {
local temp; temp="$(mktemp "$1"/tmp.XXXXXX)"
if (( $? == 0 )); then
rm "${temp}" || return 1
return 0
else
return 1
fi
}
# @info: bzip2 compression
bzip2_compression() {
var=("$@")
re='^[0-9]*$'
if [[ "x$CONFIG_multicore" = 'xyes' ]]; then
if [[ "x$CONFIG_multicore_threads" != 'xauto' ]] && [[ "x$CONFIG_multicore_threads" =~ $re ]]; then
var=( "-p${CONFIG_multicore_threads}" "${var[@]}" )
fi
pbzip2 "${var[@]}"
else
bzip2 "${var[@]}"
fi
}
# @info: gzip compression
gzip_compression() {
var=("$@")
re='^[0-9]*$'
if [[ "x$CONFIG_multicore" = 'xyes' ]]; then
if [[ "x$CONFIG_multicore_threads" != 'xauto' ]] && [[ "x$CONFIG_multicore_threads" =~ $re ]]; then
var=( "-p${CONFIG_multicore_threads}" "${var[@]}" )
fi
pigz "${var[@]}"
else
gzip "${var[@]}"
fi
}
# @info: Remove date and time information from filename by renaming it.
# @args: filename
# @return: (none)
# @deps: (none)
remove_datetimeinfo () {
mv "$1" "$(echo "$1" | sed -re 's/_[0-9]{4}-[0-9]{2}-[0-9]{2}_[0-9]{2}h[0-9]{2}m_(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday|January|February|March|April|May|June|July|August|September|October|November|December|[0-9]{1,2})//g')"
}
export -f remove_datetimeinfo
# @info: Set time and date variables.
# @args: (none)
# @deps: days_of_month
set_datetime_vars() {
datetimestamp=`date +%Y-%m-%d_%Hh%Mm` # Datestamp e.g 2002-09-21_18h12m
date_stamp=`date +%Y-%m-%d` # Datestamp e.g 2002-09-21
date_day_of_week=`date +%A` # Day of the week e.g. Monday
date_dayno_of_week=`date +%u` # Day number of the week 1 to 7 where 1 represents Monday
date_day_of_month=`date +%e | sed -e 's/^ //'` # Date of the Month e.g. 27
date_month=`date +%B` # Month e.g January
date_weekno=`date +%V | sed -e 's/^0//'` # Week Number e.g 37
year=`date +%Y`
month=`date +%m | sed -e 's/^0//'`
date_lastday_of_last_month=$(days_of_month $(( $month==1 ? 12 : $month-1 )) $(( $month==1 ? ($year-1):$year )) )
date_lastday_of_this_month=$(days_of_month $month $year)
}
# @info: This function is called after data has already been saved. It performs encryption and
# hardlink-copying of files to a latest folder.
# @return: flags
# @deps: load_default_config
files_postprocessing () {
local flags
let "flags=0x00"
let "flags_files_postprocessing_success_encrypt=0x01"
# -> CONFIG_encrypt
[[ "${CONFIG_encrypt}" = "yes" && "${CONFIG_encrypt_password}" ]] && {
if (( $CONFIG_dryrun )); then
printf 'dry-running: openssl enc -aes-256-cbc -e -in %s -out %s.enc -pass pass:%s\n' ${1} ${1} "${CONFIG_encrypt_password}"
else
openssl enc -aes-256-cbc -e -in ${1} -out ${1}.enc -pass pass:"${CONFIG_encrypt_password}"
if (( $? == 0 )); then
if rm ${1} 2>&1; then
echo "Successfully encrypted archive as ${1}.enc"
let "flags |= $flags_files_postprocessing_success_encrypt"
else
echo "Successfully encrypted archive as ${1}.enc, but could not remove cleartext file ${1}."
let "E |= $E_enc_cleartext_delfailed"
fi
else
let "E |= $E_enc_failed"
fi
fi
}
# <- CONFIG_encrypt
# -> CONFIG_mysql_dump_latest
[[ "${CONFIG_mysql_dump_latest}" = "yes" ]] && {
if (( $flags & $flags_files_postprocessing_success_encrypt )); then
if (( $CONFIG_dryrun )); then
printf 'dry-running: cp -al %s.enc %s/latest/\n' "${1}" "${CONFIG_backup_dir}"
else
cp -al "${1}.enc" "${CONFIG_backup_dir}"/latest/
fi
else
if (( $CONFIG_dryrun )); then
printf 'dry-running: cp -al %s %s/latest/\n' "${1}" "${CONFIG_backup_dir}"
else
cp -al "${1}" "${CONFIG_backup_dir}"/latest/
fi
fi
}
# <- CONFIG_mysql_dump_latest
return $flags
}
# @info: When called, sets error and notify strings matching their flags. It then goes through all
# collected error and notify messages and displays them.
# @args: (none)
# @return: true if no errors were set, otherwise false
# @deps: log_base2, load_default_config
error_handler () {
errors=(
[0x01]='dbdump() failed.'
[0x02]='Backup of local files failed. This is not this scripts primary objective. Continuing anyway.'
[0x04]="Could not create the backup_dir ${CONFIG_backup_dir}. Please check permissions of the higher directory."
[0x08]='At least one of the subdirectories (daily, weekly, monthly, latest) failed to create.'
[0x10]="The backup_dir ${CONFIG_backup_dir} is not writable AND/OR executable."
[0x20]='Could not remove the cleartext file after encryption. This error did not cause an abort. Remove it manually and check permissions.'
[0x40]='Encryption failed. Continuing without encryption.'
[0x80]='The mysql server is empty, i.e. no databases found. Check if something is wrong. Exiting.'
[0x100]='Failed to create the named pipe (fifo) for reading in all databases. Exiting.'
[0x200]='Dependency programs are missing. Perhaps they are not in $PATH. Exiting.'
[0x400]='No basedir found, i.e. '
[0x800]="${CONFIG_backup_dir} is not writable. Exiting."
[0x1000]='Running of mysqlstatus failed.'
[0x2000]='Running of mysqldump full schema failed.'
)
notify=(
[0x01]="${CONFIG_configfile} was not found - no global config file."
[0x02]="Parsed config file ${opt_config_file}."
[0x04]="Unreadable config file \"${opt_config_file}\""
[0x08]='Supplied more than one argument, ignoring ALL arguments - using default and global config file only.'
[0x10]='Could not remove the files in the latest directory. Please check this.'
[0x20]='No local backup files were set.'
[0x40]=''
[0x80]=''
[0x100]=''
[0x200]=''
[0x400]=''
[0x800]=''
[0x1000]=''
[0x2000]=''
)
local n
local e
n=$((${#notify[@]}-1))
while (( N > 0 )); do
e=$((2**n))
if (( N&e )); then
echo "Note:" ${notify[e]}
let "N-=e"
fi
((n--))
done
unset n;
n=$((${#errors[@]}-1))
if (( E > 0 )); then
while (( E > 0 )); do
e=$((2**n))
if (( E&e )); then
echo "Error:" ${errors[e]}
let "E-=e"
fi
((n--))
done
exit 1
else
exit 0
fi
}
# @info: Packs files in array ${#CONFIG_backup_local_files[@]} into tar file with optional compression.
# @args: archive file without compression suffix, i.e. ending on .tar
# @return: true in case of dry-run, otherwise the return value of tar -cvf
# @deps: load_default_config
backup_local_files () {
if ((! ${#CONFIG_backup_local_files[@]})) ; then
if (( $CONFIG_dryrun )); then
case "${CONFIG_mysql_dump_compression}" in
'gzip')
echo "tar -czvf ${1}${suffix} ${CONFIG_backup_local_files[@]}";
;;
'bzip2')
echo "tar -cjvf ${1}${suffix} ${CONFIG_backup_local_files[@]}";
;;
*)
echo "tar -cvf ${1}${suffix} ${CONFIG_backup_local_files[@]}";
;;
esac
echo "dry-running: tar -cv ${1} ${CONFIG_backup_local_files[@]}"
return 0;
else
case "${CONFIG_mysql_dump_compression}" in
'gzip')
tar -czvf "${1}${suffix}" "${CONFIG_backup_local_files[@]}";
return $?
;;
'bzip2')
tar -cjvf "${1}${suffix}" "${CONFIG_backup_local_files[@]}";
return $?
;;
*)
tar -cvf "${1}${suffix}" "${CONFIG_backup_local_files[@]}";
return $?
;;
esac
fi
else
let "N |= $N_backup_local_nofiles"
echo "No local backup files specified."
fi
}
# @info: Parses the configuration options and sets the variables appropriately.
# @args: (none)
# @deps: load_default_config
parse_configuration () {
# OPT string for use with mysqldump ( see man mysqldump )
opt=( '--quote-names' '--opt' '--skip-lock-tables' '--skip-add-locks' '--events' )
# OPT string for use with mysql (see man mysql )
mysql_opt=()
# OPT string for use with mysqldump fullschema
opt_fullschema=( '--all-databases' '--routines' '--no-data' )
# OPT string for use with mysqlstatus
opt_dbstatus=( '--status' )
# Set up mysql username and password
case "${CONFIG_mysql_dump_use_mycnf_for_userpass}" in
'yes') mysql_credentials='';;
'no') mysql_credentials="--user=${CONFIG_mysql_dump_username} --password=${CONFIG_mysql_dump_password}";;
*) if [ -r ${CONFIG_mysql_dump_use_mycnf_for_userpass} ];then mysql_credentials="--defaults-extra-file=${CONFIG_mysql_dump_use_mycnf_for_userpass}";else mysql_credentials="--user=${CONFIG_mysql_dump_username} --password=${CONFIG_mysql_dump_password}";fi;;
esac
[[ "${CONFIG_mysql_dump_usessl}" = "yes" ]] && {
opt=( "${opt[@]}" '--ssl' )
mysql_opt=( "${mysql_opt[@]}" '--ssl' )
opt_fullschema=( "${opt_fullschema[@]}" '--ssl' )
opt_dbstatus=( "${opt_dbstatus[@]}" '--ssl' )
}
[[ "${CONFIG_mysql_dump_master_data}" ]] && (( ${CONFIG_mysql_dump_master_data} == 1 || ${CONFIG_mysql_dump_master_data} == 2 )) && { opt=( "${opt[@]}" "--master-data=${CONFIG_mysql_dump_master_data}" );}
[[ "${CONFIG_mysql_dump_single_transaction}" = "yes" ]] && {
opt=( "${opt[@]}" '--single-transaction' )
opt_fullschema=( "${opt_fullschema[@]}" '--single-transaction' )
}
[[ "${CONFIG_mysql_dump_commcomp}" = "yes" ]] && {
opt=( "${opt[@]}" '--compress' )
opt_fullschema=( "${opt_fullschema[@]}" '--compress' )
opt_dbstatus=( "${opt_dbstatus[@]}" '--compress' )
}
[[ "${CONFIG_mysql_dump_max_allowed_packet}" ]] && {
opt=( "${opt[@]}" "--max_allowed_packet=${CONFIG_mysql_dump_max_allowed_packet}" )
opt_fullschema=( "${opt_fullschema[@]}" "--max_allowed_packet=${CONFIG_mysql_dump_max_allowed_packet}" )
}
[[ "${CONFIG_mysql_dump_socket}" ]] && {
opt=( "${opt[@]}" "--socket=${CONFIG_mysql_dump_socket}" )
mysql_opt=( "${mysql_opt[@]}" "--socket=${CONFIG_mysql_dump_socket}" )
opt_fullschema=( "${opt_fullschema[@]}" "--socket=${CONFIG_mysql_dump_socket}" )
opt_dbstatus=( "${opt_dbstatus[@]}" "--socket=${CONFIG_mysql_dump_socket}" )
}
[[ "${CONFIG_mysql_dump_port}" ]] && {
opt=( "${opt[@]}" "--port=${CONFIG_mysql_dump_port}" )
mysql_opt=( "${mysql_opt[@]}" "--port=${CONFIG_mysql_dump_port}" )
opt_fullschema=( "${opt_fullschema[@]}" "--port=${CONFIG_mysql_dump_port}" )
opt_dbstatus=( "${opt_dbstatus[@]}" "--port=${CONFIG_mysql_dump_port}" )
}
# Check if CREATE DATABASE should be included in Dump
if [[ "${CONFIG_mysql_dump_use_separate_dirs}" = "yes" ]]; then
if [[ "${CONFIG_mysql_dump_create_database}" = "no" ]]; then
opt=( "${opt[@]}" '--no-create-db' )
else
opt=( "${opt[@]}" '--databases' )
fi
else
opt=( "${opt[@]}" '--databases' )
fi
# if differential backup is active and the specified rotation is smaller than 21 days, set it to 21 days to ensure, that
# master backups aren't deleted.
if [[ "x$CONFIG_mysql_dump_differential" = "xyes" ]] && (( ${CONFIG_rotation_daily} < 21 )); then
CONFIG_rotation_daily=21
fi
# -> determine suffix
case "${CONFIG_mysql_dump_compression}" in
'gzip') suffix='.gz';;
'bzip2') suffix='.bz2';;
*) suffix='';;
esac
# <- determine suffix
# -> check exclude tables for wildcards
local tmp;tmp=()
local z;z=0
for i in "${CONFIG_table_exclude[@]}"; do
r='^[^*.]+\.[^.]+$'; [[ "$i" =~ $r ]] || { printf 'The entry %s in CONFIG_table_exclude has a wrong format. Ignoring the entry.' "$i"; continue; }
db=${i%.*}
table=${i#"$db".}
r='\*'; [[ "$i" =~ $r ]] || { tmp[z++]="$i"; continue; }
while read -r; do tmp[z++]="${db}.${REPLY}"; done < <(mysql ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${mysql_opt[@]}" --batch --skip-column-names -e "select table_name from information_schema.tables where table_schema='${db}' and table_name like '${table//\*/%}';")
done
for l in "${tmp[@]}"; do echo "exclude $l";done
CONFIG_table_exclude=("${tmp[@]}")
# <-
if ((${#CONFIG_table_exclude[@]})); then
for i in "${CONFIG_table_exclude[@]}"; do
opt=( "${opt[@]}" "--ignore-table=$i" )
done
fi
}
# @info: Backup database status
# @args: archive file without compression suffix, i.e. ending on .txt
# @return: true in case of dry-run, otherwise the return value of mysqlshow
# @deps: load_default_config, parse_configuration
dbstatus() {
if (( $CONFIG_dryrun )); then
case "${CONFIG_mysql_dump_compression}" in
'gzip')
echo "dry-running: mysqlshow ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt_dbstatus[@]} | gzip_compression > ${1}${suffix}";
;;
'bzip2')
echo "dry-running: mysqlshow ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt_dbstatus[@]} | bzip2_compression > ${1}${suffix}";
;;
*)
echo "dry-running: mysqlshow ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt_dbstatus[@]} > ${1}${suffix}";
;;
esac
return 0;
else
case "${CONFIG_mysql_dump_compression}" in
'gzip')
mysqlshow ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt_dbstatus[@]}" | gzip_compression > "${1}${suffix}";
return $?
;;
'bzip2')
mysqlshow ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt_dbstatus[@]}" | bzip2_compression > "${1}${suffix}";
return $?
;;
*)
mysqlshow ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt_dbstatus[@]}" > "${1}${suffix}";
return $?
;;
esac
fi
}
# @info: Backup of the database schema.
# @args: filename to save data to
# @return: true in case of dry-run, otherwise the return value of mysqldump
# @deps: load_default_config, parse_configuration
fullschema () {
if (( $CONFIG_dryrun )); then
case "${CONFIG_mysql_dump_compression}" in
'gzip')
echo "dry-running: mysqldump ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt_fullschema[@]} | gzip_compression > ${1}${suffix}";
;;
'bzip2')
echo "dry-running: mysqldump ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt_fullschema[@]} | bzip2_compression > ${1}${suffix}";
;;
*)
echo "dry-running: mysqldump ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt_fullschema[@]} > ${1}${suffix}";
;;
esac
return 0;
else
case "${CONFIG_mysql_dump_compression}" in
'gzip')
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt_fullschema[@]}" | gzip_compression > "${1}${suffix}";
return $?
;;
'bzip2')
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt_fullschema[@]}" | bzip2_compression > "${1}${suffix}";
return $?
;;
*)
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt_fullschema[@]}" > "${1}${suffix}";
return $?
;;
esac
fi
}
# @info: Process a single db.
# @args: subfolder, prefix, midfix, extension, rotation, rotation_divisor, rotation_string, 0/1 (db/dbs), db[, db ...]
process_dbs() {
local subfolder="$1"
local prefix="$2"
local midfix="$3"
local extension="$4"
local rotation="$5"
local rotation_divisor="$6"
local rotation_string="$7"
local multipledbs="$8"
shift 8
local name
local subsubfolder
# only activate differential backup for daily backups
[[ "x$subfolder" != "xdaily" ]] && activate_differential_backup=0 || activate_differential_backup=1
if (( $multipledbs )); then
# multiple dbs
subsubfolder=""
name="all-databases"
else
# single db
subsubfolder="/$1"
name="$@"
fi
[[ -d "${CONFIG_backup_dir}/${subfolder}${subsubfolder}" ]] || {
if (( $CONFIG_dryrun )); then
printf 'dry-running: mkdir -p %s/${subfolder}%s\n' "${CONFIG_backup_dir}" "${subsubfolder}"
else
mkdir -p "${CONFIG_backup_dir}/${subfolder}${subsubfolder}"
fi
}
manifest_file="${CONFIG_backup_dir}/${subfolder}${subsubfolder}/Manifest"
fname="${CONFIG_backup_dir}/${subfolder}${subsubfolder}/${prefix}${name}_${datetimestamp}${midfix}${extension}"
(( $CONFIG_debug )) && echo "DEBUG: process_dbs >> Setting manifest file to: ${manifest_file}"
if (( $multipledbs )); then
# multiple databases
db="all-databases"
else
# single db
db="$1"
fi
if [[ "x$CONFIG_mysql_dump_differential" = "xyes" ]] && [[ "x${CONFIG_encrypt}" != "xyes" ]] && (( $activate_differential_backup )); then
unset manifest_entry manifest_entry_to_check
echo "## Reading in Manifest file"
parse_manifest "$manifest_file"
echo
echo "Number of manifest entries: $(num_manifest_entries)"
echo
# -> generate diff file
let "filename_flags=0x00"
# ## -> get latest differential manifest entry for specified db
# if get_latest_manifest_entry_for_db "$db" 1; then
# pid="${manifest_entry[2]}"
# # filename format: prefix_db_YYYY-MM-DD_HHhMMm_[A-Za-z0-9]{8}(.sql|.diff)(.gz|.bz2)(.enc)
# FileStub=${manifest_entry[0]%.@(sql|diff)*}
# FileExt=${manifest_entry[0]#"$FileStub"}
# re=".*\.enc.*"; [[ "$FileExt" =~ $re ]] && let "filename_flags|=$filename_flag_encrypted"
# re=".*\.gz.*"; [[ "$FileExt" =~ $re ]] && let "filename_flags|=$filename_flag_gz"
# re=".*\.bz2.*"; [[ "$FileExt" =~ $re ]] && let "filename_flags|=$filename_flag_bz2"
# re=".*\.diff.*"; [[ "$FileExt" =~ $re ]] && let "filename_flags|=$filename_flag_diff"
# manifest_latest_diff_entry=("${manifest_entry[@]}")
# else # no entries in manifest
# pid=0
# fi
# ## <- get latest differential manifest entry for specified db
## -> get latest master manifest entry for specified db
# Create a differential backup if a master entry in the manifest exists, it isn't the day we do weekly master backups or the master file we fetched is already from today.
if get_latest_manifest_entry_for_db "$db" 0 && ( (( ${date_dayno_of_week} != ${CONFIG_do_weekly} )) || [[ "${manifest_entry[0]}" = *_$(date +%Y-%m-%d)_* ]] ); then
pid="${manifest_entry[2]}"
# filename format: prefix_db_YYYY-MM-DD_HHhMMm_[A-Za-z0-9]{8}(.sql|.diff)(.gz|.bz2)(.enc)
FileStub="${manifest_entry[0]%.@(sql|diff)*}"
FileExt="${manifest_entry[0]#"$FileStub"}"
re=".*\.enc.*"; [[ "$FileExt" =~ $re ]] && let "filename_flags|=$filename_flag_encrypted"
re=".*\.gz.*"; [[ "$FileExt" =~ $re ]] && let "filename_flags|=$filename_flag_gz"
re=".*\.bz2.*"; [[ "$FileExt" =~ $re ]] && let "filename_flags|=$filename_flag_bz2"
re=".*\.diff.*"; [[ "$FileExt" =~ $re ]] && let "filename_flags|=$filename_flag_diff"
manifest_latest_master_entry=("${manifest_entry[@]}")
else # no entries in manifest
pid=0
fi
## <- get latest master manifest entry for specified db
fi
if [[ "x$CONFIG_mysql_dump_differential" = "xyes" ]] && [[ "x${CONFIG_encrypt}" != "xyes" ]] && (( $activate_differential_backup )) && ((! ($filename_flags & $filename_flag_encrypted) )); then
# the master file is encrypted ... well this just shouldn't happen ^^ not going to decrypt or stuff like that ...at least not today :)
if [[ "x$pid" = "x0" ]]; then
# -> create master backup
cfname="$(mktemp "${fname%.sql}_"XXXXXXXX".sql${suffix}")"
uid="${cfname%.@(diff|sql)*}"
uid="${uid:-8:8}"
case "${CONFIG_mysql_dump_compression}" in
'gzip')
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@" | gzip_compression > "$cfname";
;;
'bzip2')
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@" | bzip2_compression > "$cfname";
;;
*)
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@" > "$cfname";
;;
esac
add_manifest_entry "$manifest_file" "$cfname" "$pid" "$db" && parse_manifest "$manifest_file" && cp -al "$cfname" "${CONFIG_backup_dir}"/latest/ && echo "Generated master backup $cfname" && return 0 || return 1
# <- create master backup
else
cfname="$(mktemp "${fname%.sql}_"XXXXXXXX".diff${suffix}")"
uid="${cfname%.@(diff|sql)*}"
uid=${uid:-8:8}
echo "Creating differential backup to ${manifest_entry[0]}:"
case "${CONFIG_mysql_dump_compression}" in
'gzip')
if (( $filename_flags & $filename_flag_gz )); then
diff <(gzip_compression -dc "${manifest_latest_master_entry[0]}") <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") | gzip_compression > "$cfname";
elif (( $filename_flags & $filename_flag_bz2 )); then
diff <(bzip2_compression -dc "${manifest_latest_master_entry[0]}") <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") | gzip_compression > "$cfname";
else
diff "${manifest_latest_master_entry[0]}" <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") | gzip_compression > "$cfname";
fi
;;
'bzip2')
if (( $filename_flags & $filename_flag_gz )); then
diff <(gzip_compression -dc "${manifest_latest_master_entry[0]}") <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") | bzip2_compression > "$cfname";
elif (( $filename_flags & $filename_flag_bz2 )); then
diff <(bzip2_compression -dc "${manifest_latest_master_entry[0]}") <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") | bzip2_compression > "$cfname";
else
diff "${manifest_latest_master_entry[0]}" <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") | bzip2_compression > "$cfname";
fi
;;
*)
if (( $filename_flags & $filename_flag_gz )); then
diff <(gzip_compression -dc "${manifest_latest_master_entry[0]}") <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") > "$cfname";
elif (( $filename_flags & $filename_flag_bz2 )); then
diff <(bzip2_compression -dc "${manifest_latest_master_entry[0]}") <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") > "$cfname";
else
diff "${manifest_latest_master_entry[0]}" <(mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@") > "$cfname";
fi
;;
esac
add_manifest_entry "$manifest_file" "$cfname" "$pid" "$db" && parse_manifest "$manifest_file" && cp -al "$cfname" "${manifest_latest_master_entry[0]}" "${CONFIG_backup_dir}"/latest/ && echo "generated $cfname" && return 0 || return 1
fi
# <- generate diff filename
else
cfname="${fname}${suffix}"
if (( $CONFIG_dryrun )); then
case "${CONFIG_mysql_dump_compression}" in
'gzip')
echo "dry-running: mysqldump ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt[@]} $@ | gzip_compression > ${cfname}"
;;
'bzip2')
echo "dry-running: mysqldump ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt[@]} $@ | bzip2_compression > ${cfname}"
;;
*)
echo "dry-running: mysqldump ${mysql_credentials} --host=${CONFIG_mysql_dump_host} ${opt[@]} $@ > ${cfname}"
;;
esac
return 0;
else
case "${CONFIG_mysql_dump_compression}" in
'gzip')
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@" | gzip_compression > "${cfname}"
ret=$?
;;
'bzip2')
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@" | bzip2_compression > "${cfname}"
ret=$?
;;
*)
mysqldump ${mysql_credentials} --host="${CONFIG_mysql_dump_host}" "${opt[@]}" "$@" > "${cfname}"
ret=$?
;;
esac
fi
fi
if (( $ret == 0 )); then
echo "Rotating $(( ${rotation}/${rotation_divisor} )) ${rotation_string} backups for ${name}"
if (( $CONFIG_dryrun )); then
find "${CONFIG_backup_dir}/${subfolder}${subsubfolder}" -mtime +"${rotation}" -type f -exec echo "dry-running: rm" {} \;
else
find "${CONFIG_backup_dir}/${subfolder}${subsubfolder}" -mtime +"${rotation}" -type f -exec rm {} \;
fi
files_postprocessing "$cfname"
tmp_flags=$?; var=; (( $tmp_flags & $flags_files_postprocessing_success_encrypt )) && var=.enc
backupfiles=( "${backupfiles[@]}" "${cfname}${var}" )
else
let "E |= $E_dbdump_failed"
echo "dbdump with parameters \"${CONFIG_db_names[@]}\" \"${cfname}\" failed!"
fi
}
# @info: Save stdout and stderr
# @deps: (none)
activateIO() {
###################################################################################
# IO redirection for logging.
# $1 = $log_file, $2 = $log_errfile
#(( $CONFIG_debug )) || {
touch "$log_file"
exec 6>&1 # Link file descriptor #6 with stdout. Saves stdout.
exec > "$log_file" # stdout replaced with file $log_file.
touch "$log_errfile"
exec 7>&2 # Link file descriptor #7 with stderr. Saves stderr.
exec 2> "$log_errfile" # stderr replaced with file $log_errfile.
#}
}
# @info: Restore stdout and stderr redirections.
# @deps: (none)
removeIO() {
exec 1>&6 6>&- # Restore stdout and close file descriptor #6.
exec 2>&7 7>&- # Restore stdout and close file descriptor #7.
}
# @info: Checks directories and subdirectories for existence and activates logging to either
# $CONFIG_backup_dir or /tmp depending on what exists.
# @args: (none)
# @deps: load_default_config, activateIO, chk_folder_writable, error_handler
directory_checks_enable_logging () {
###################################################################################
# Check directories and do cleanup work
checkdirs=( "${CONFIG_backup_dir}"/{daily,weekly,monthly,latest,tmp} )
[[ "${CONFIG_backup_local_files[@]}" ]] && { checkdirs=( "${checkdirs[@]}" "${CONFIG_backup_dir}/backup_local_files" ); }
[[ "${CONFIG_mysql_dump_full_schema}" = 'yes' ]] && { checkdirs=( "${checkdirs[@]}" "${CONFIG_backup_dir}/fullschema" ); }
[[ "${CONFIG_mysql_dump_dbstatus}" = 'yes' ]] && { checkdirs=( "${checkdirs[@]}" "${CONFIG_backup_dir}/status" ); }
tmp_permcheck=0
printf '# Checking for permissions to write to folders:\n'
# "dirname ${CONFIG_backup_dir}" exists?
# Y -> ${CONFIG_backup_dir} exists?
# Y -> Dry-run?
# Y -> log to /tmp, proceed to test subdirs
# N -> check writable ${CONFIG_backup_dir}?
# Y -> proceed to test subdirs
# N -> error: can't write to ${CONFIG_backup_dir}. Exit.
# N -> Dry-run?
# N -> proceed without testing subdirs
# Y -> create directory ${CONFIG_backup_dir}?
# Y -> check writable ${CONFIG_backup_dir}?
# Y -> proceed to test subdirs
# N -> error: can't write to ${CONFIG_backup_dir}. Exit.
# N -> error: ${CONFIG_backup_dir} is not writable. Exit.
# N -> Dry-run?
# Y -> log to /tmp, proceed without testing subdirs
# N -> error: no basedir. Exit.
# -> check base folder
printf 'base folder %s ... ' "$(dirname "${CONFIG_backup_dir}")"
if [[ -d "$(dirname "${CONFIG_backup_dir}")" ]]; then
printf 'exists ... ok.\n'
printf 'backup folder %s ... ' "${CONFIG_backup_dir}"
if [[ -d "${CONFIG_backup_dir}" ]]; then
printf 'exists ... writable? '
if (( $CONFIG_dryrun )); then
printf 'dry-running. Skipping. Logging to /tmp\n'
log_file="/tmp/${CONFIG_mysql_dump_host}-`date +%N`.log"
log_errfile="/tmp/ERRORS_${CONFIG_mysql_dump_host}-`date +%N`.log"
activateIO "$log_file" "$log_errfile"
tmp_permcheck=1
else
if chk_folder_writable "${CONFIG_backup_dir}"; then
printf 'yes. Proceeding.\n'
log_file="${CONFIG_backup_dir}/${CONFIG_mysql_dump_host}-`date +%N`.log"
log_errfile="${CONFIG_backup_dir}/ERRORS_${CONFIG_mysql_dump_host}-`date +%N`.log"
activateIO "$log_file" "$log_errfile"
tmp_permcheck=1
else
printf 'no. Exiting.\n'
let "E |= $E_config_backupdir_not_writable"
error_handler
fi
fi
else
printf 'creating ... '
if (( $CONFIG_dryrun )); then
printf 'dry-running. Skipping.\n'
else
if mkdir -p "${CONFIG_backup_dir}" >/dev/null 2>&1; then
printf 'success.\n'
log_file="${CONFIG_backup_dir}/${CONFIG_mysql_dump_host}-`date +%N`.log"
log_errfile="${CONFIG_backup_dir}/ERRORS_${CONFIG_mysql_dump_host}-`date +%N`.log"
activateIO "$log_file" "$log_errfile"
tmp_permcheck=1
else
printf 'failed. Exiting.\n'
let "E |= $E_mkdir_basedir_failed"
error_handler
fi
fi
fi
else
if (( $CONFIG_dryrun )); then
printf 'dry-running. Skipping. Logging to /tmp\n'
log_file="/tmp/${CONFIG_mysql_dump_host}-`date +%N`.log"
log_errfile="/tmp/ERRORS_${CONFIG_mysql_dump_host}-`date +%N`.log"
activateIO "$log_file" "$log_errfile"
else
printf 'does not exist. Exiting.\n'
let "E |= $E_no_basedir"
error_handler
fi
fi
# <- check base folder
# -> check subdirs
if (( $tmp_permcheck == 1 )); then
(( $CONFIG_dryrun )) || [[ -r "${CONFIG_backup_dir}" && -x "${CONFIG_backup_dir}" ]] || { let "E |= $E_perm_basedir"; error_handler; }
for i in "${checkdirs[@]}"; do
printf 'checking directory "%s" ... ' "$i"
if [[ -d "$i" ]]; then
printf 'exists.\n'
else
printf 'creating ... '
if (( $CONFIG_dryrun )); then
printf 'dry-running. Skipping.\n'
else
if mkdir -p "$i" >/dev/null 2>&1; then
printf 'success.\n'
else
printf 'failed. Exiting.\n'
let "E |= $E_mkdir_subdirs_failed"
error_handler
fi
fi
fi
done
fi
# <- check subdirs
}
# @info: If CONFIG_mysql_dump_latest is set to 'yes', the directory ${CONFIG_backup_dir}"/latest will
# be cleaned.
# @args: (none)
# @deps: load_default_config
cleanup_latest () {
# -> latest cleanup
if [[ "${CONFIG_mysql_dump_latest}" = "yes" ]]; then
printf 'Cleaning up latest directory ... '
if (( $CONFIG_dryrun )); then
printf 'dry-running. Skipping.\n'
else
if rm -f "${CONFIG_backup_dir}"/latest/* >/dev/null 2>&1; then
printf 'success.\n'
else
printf 'failed. Continuing anyway, activating Note-Flag.\n'
let "N |= $N_latest_cleanup_failed"
fi
fi
fi
# <- latest cleanup
}