pilerBackup/pilerbackup.sh

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#!/bin/sh
#######
### Backup exported email from piler (bare-metal)
#######
### text formatting presents
norm=$(tput sgr0)
err=$(tput bold)$(tput setaf 1)
warn=$(tput bold)$(tput setaf 3)
ok=$(tput setaf 2)
yellow=$(tput setaf 3)
cyan=$(tput setaf 6)
magenta=$(tput setaf 5)
### trap
trap trapExit 1 2 3 6
### functions
# bad configuration value passed in details file
badDetails () {
if [ "$1" = "empty" ]; then
exitError 130 "details:${2} cannot be NULL (undefined)"
elif [ "$1" = "dne" ]; then
exitError 131 "details:${2} file or directory does not exist."
fi
}
# bad parameter passed to script
badParam () {
if [ "$1" = "dne" ]; then
printf "${err}\nError: '%s %s'\n" "$2" "$3"
printf "file or directory does not exist.${norm}\n\n"
exit 1
elif [ "$1" = "empty" ]; then
printf "${err}\nError: '%s' cannot have a NULL (empty) value.\n" "$2"
printf "${cyan}Please use '--help' for assistance${norm}\n\n"
exit 1
elif [ "$1" = "svc" ]; then
printf "${err}\nError: '%s %s': Service does not exist!${norm}\n\n" \
"$2" "$3"
exit 1
fi
}
# cleanup
cleanup () {
# cleanup 503 if copied
if [ "$err503Copied" -eq 1 ]; then
if ! rm -f "$webroot/$err503File" 2>>"$logFile"; then
printf "${warn}[%s] -- [WARNING] Could not remove 503 error page." \
"$(stamp)" >> "$logFile"
printf " Web interface will not function until this file is " \
>> "$logFile"
printf "removed --${norm}\n" >> "$logFile"
warnCount=$((warnCount+1))
else
printf "${cyan}[%s] -- [INFO] 503 error page removed --${norm}\n" \
"$(stamp)" >> "$logFile"
fi
fi
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# remove EML temporary directory
if ! rm -f "$exportDir" 2>>"$logFile"; then
printf "${warn}[%s] -- [WARNING] Could not remove EML export tmp dir:" \
"$(stamp)" >> "$logFile"
printf "\n%s\n" "$exportDir" >> "$logFile"
printf "please remove this directory manually! --${norm}\n" \
>> "$logFile"
warnCount=$((warnCount+1))
else
printf "${cyan}[%s] -- [INFO] EML temp directory removed --${norm}\n" \
"$(stamp)" >> "$logFile"
fi
}
# call cleanup and then exit with error report
exitError () {
printf "${err}[%s] -- [ERROR] %s: %s --${norm}\n" \
"$(stamp)" "$1" "$2" >> "$logFile"
cleanup
# note script completion with error
printf "${err}[%s] --- %s execution completed with error ---${norm}\n" \
"$(stamp)" "$scriptName" >> "$logFile"
exit "$1"
}
# display script help information
scriptHelp () {
printf "\n${cyan}%s\n" "--------------------------------------------------------------------------------"
printf "Usage:${norm} %s [parameters]\n\n" "$scriptName"
printf "${cyan}Parameters ${yellow}(default value):${norm}\n"
printf "There are NO mandatory parameters. If a parameter is not "
printf "supplied, it's\n"
printf "default value will be used. In the case of a switch parameter, "
printf "it will\n"
printf "remain deactivated if not specified.\n\n"
printf "${magenta}script related\n"
printf "${cyan}-c, --config, --details${norm}\n"
printf "Path to the configuration key/value pair file for this script.\n"
printf "${yellow}(scriptPath/scriptName.details)${norm}\n\n"
printf "${cyan}-h, -?, --help${norm}\n"
printf "This help screen.\n\n"
printf "${cyan}-l, --log${norm}\n"
printf "Path to write log file.\n"
printf "${yellow}(scriptPath/scriptName.log)${norm}\n\n"
printf "${cyan}-v, --verbose${norm}\n"
printf "Log borg output with increased verbosity (list all files). "
printf "Careful! Your\n"
printf "log file can get large very quickly! This is a switch value, "
printf "specifying it\n"
printf "will turn the option ON.\n"
printf "${yellow}(normal output, option is OFF)${norm}\n\n"
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printf "${magenta}export options\n"
printf "${cyan}-a, --all${norm}\n"
printf "Export ALL email saved by piler. This is generally only useful "
printf "for an initial\n"
printf "backup. This is a switch parameter and WILL override specified "
printf "start/end dates.\n"
printf "${yellow}(option is OFF, use start/end dates)${norm}\n\n"
printf "${cyan}--start${norm}\n"
printf "Export email starting from this date (inclusive)\n"
printf "Date MUST be provided in the format 'YYYY.MM.DD'\n"
printf "${yellow}(Today's date)${norm}\n\n"
printf "${cyan}--end${norm}\n"
printf "Export email ending at this date (inclusive)\n"
printf "Date MUST be provided in the format 'YYYY.MM.DD'\n"
printf "${yellow}(Today's date)${norm}\n\n"
printf "${magenta}503 functionality\n"
printf "${cyan}-5, --use-503${norm}\n"
printf "Copy an 'error 503' page to your webroot for your webserver to "
printf "find. This is a\n"
printf "switch value, specifying it will instruct the script to copy the "
printf "error page.\n"
printf "${yellow}(do NOT copy, option is OFF)${norm}\n\n"
printf "${cyan}--503-path${norm}\n"
printf "Path to the file you want copied to your webroot as the 'error "
printf "503' page during\n"
printf "backup operations.\n"
printf "${yellow}(scriptPath/503_backup.html)${norm}\n\n"
printf "${cyan}-w, --webroot${norm}\n"
printf "Path to where the 'error 503' file should be copied during "
printf "backups.\n"
printf "${yellow}(/usr/share/nginx/html)${norm}\n\n"
printf "More details and examples of script usage can be found in the "
printf "repo wiki at\n"
printf "${yellow}https://git.asifbacchus.app/asif/pilerBackup/wiki${norm}\n"
printf "${cyan}%s${norm}\n\n" "--------------------------------------------------------------------------------"
}
# generate dynamic timestamps
stamp () {
(date +%F" "%T)
}
# same as exitError but for signal captures
trapExit () {
printf "${err}[%s] -- [ERROR] 99: Caught signal --${norm}\n" \
"$(stamp)" >> "$logFile"
cleanup
# note script completion with error
printf "${err}[%s] --- %s execution was terminated via signal ---${norm}\n" \
"$(stamp)" "$scriptName" >> "$logFile"
exit 99
}
### end of functions
### default variable values
## script related
# store logfile in the same directory as this script file using the same file
# name as the script but with the extension '.log'
scriptPath="$( CDPATH='' cd -- "$( dirname -- "$0" )" && pwd -P )"
scriptName="$( basename "$0" )"
logFile="$scriptPath/${scriptName%.*}.log"
warnCount=0
configDetails="$scriptPath/${scriptName%.*}.details"
err503Copied=0
includeXtra=0
exclusions=0
# borg output verbosity -- normal
borgCreateParams='--stats'
borgPruneParams='--list'
# 503 related
use503=0
err503Path="$scriptPath/503_backup.html"
err503File="${err503Path##*/}"
webroot="/usr/share/nginx/html"
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# piler-export related
exportAll=0
exportStart=$(date +'%Y.%m.%d')
exportEnd=$(date +'%Y.%m.%d')
### process startup parameters
while [ $# -gt 0 ]; do
case "$1" in
-h|-\?|--help)
# display help
scriptHelp
exit 0
;;
-l|--log)
# set log file location
if [ -n "$2" ]; then
logFile="${2%/}"
shift
else
badParam empty "$@"
fi
;;
-v|--verbose)
# set verbose logging from borg
borgCreateParams='--list --stats'
borgPruneParams='--list'
;;
-c|--config|--details)
# location of config details file
if [ -n "$2" ]; then
if [ -f "$2" ]; then
configDetails="${2%/}"
shift
else
badParam dne "$@"
fi
else
badParam empty "$@"
fi
;;
-5|--use-503)
# enable copying 503 error page to webroot
use503=1
;;
--503-path)
# FULL path to 503 file
if [ -n "$2" ]; then
if [ -f "$2" ]; then
err503Path="${2%/}"
err503File="${2##*/}"
shift
else
badParam dne "$@"
fi
else
badParam empty "$@"
fi
;;
-w|--webroot)
# path to webroot (copy 503)
if [ -n "$2" ]; then
if [ -d "$2" ]; then
webroot="${2%/}"
shift
else
badParam dne "$@"
fi
else
badParam empty "$@"
fi
;;
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-a|--all)
# export ALL email stored in piler
exportAll=1
;;
--start)
# export starting at this date
if [ -n "$2" ]; then
exportStart="$2"
shift
else
badParam empty "$@"
fi
;;
--end)
# export ending at this date
if [ -n "$2" ]; then
exportEnd="$2"
shift
else
badParam empty "$@"
fi
;;
*)
printf "${err}\nUnknown option: %s\n" "$1"
printf "${cyan}Use '--help' for valid options.{$norm}\n\n"
exit 1
;;
esac
shift
done
### check pre-requisites and default values
# does the details file exist?
if [ ! -f "$configDetails" ]; then
badParam dne "(--details default)" "$configDetails"
fi
# is borg installed?
if ! command -v borg > /dev/null; then
printf "\n${err}ERROR: BORG is not installed on this system!${norm}\n\n"
exit 3
fi
# if 503 functionality is enabled, do 503 related files exist?
if [ "$use503" -eq 1 ]; then
if [ ! -f "$err503Path" ]; then
badParam dne "(--503-path default)" "$err503Path"
elif [ ! -d "$webroot" ]; then
badParam dne "(--webroot default)" "$webroot"
fi
fi
### start logging
printf "${magenta}[%s] --- Start %s execution ---${norm}\n" \
"$(stamp)" "$scriptName" >> "$logFile"
printf "${cyan}[%s] -- [INFO] Log located at ${yellow}%s${cyan} --${norm}\n" \
"$(stamp)" "$logFile" >> "$logFile"
### 503 functionality
if [ "$use503" -eq 1 ]; then
printf "${cyan}[%s] -- [INFO] Copying 503 error page to " \
"$(stamp)" >> "$logFile"
printf "webroot -- ${norm}\n" >> "$logFile"
if ! \cp --force "${err503Path}" "${webroot}/${err503File}" 2>> "$logFile"
then
printf "${warn}[%s] -- [WARNING] Failed to copy 503 error page. " \
"$(stamp)" >> "$logFile"
printf "Web users will NOT be notified --${norm}\n" >> "$logFile"
warnCount=$((warnCount+1))
else
printf "${ok}[%s] -- [SUCCESS] 503 error page copied --${norm}\n" \
"$(stamp)" >> "$logFile"
# set cleanup flag
err503Copied=1
fi
fi
### read details file to get variables needed to dump sql and run borg
# check if config details file was provided as a relative or absolute path
case "${configDetails}" in
/*)
# absolute path, no need to rewrite variable
. "${configDetails}"
;;
*)
# relative path, prepend './' to create absolute path
. "./${configDetails}"
;;
esac
printf "${cyan}[%s] -- [INFO] ${yellow}%s${cyan} imported --${norm}\n" \
"$(stamp)" "$configDetails" >> "$logFile"
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## create tmp directory and change to it for export operations
printf "${cyan}[%s] -- [INFO] Exporting EML files from piler --${norm}\n" \
"$(stamp)" >> "$logFile"
# create temporary directory to dump files before borg backup
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if ! exportDir=$( mktemp -d 2>>"$logFile" ); then
exitError 111 "Could not create temporary directory for exported EML files"
fi
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if ! cd "$exportDir"; then
exitError 112 "Unable to change to temporary export directory"
fi
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printf "${cyan}[%s] -- [INFO] EML files will be temporarily stored in:" \
"$(stamp)" >> "$logFile"
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printf "\n${yellow}%s/${cyan} --${norm}\n" "$exportDir" >> "$logFile"
## export EML from piler
if [ "$exportAll" -eq 1 ]; then
if ! pilerexport -A 2>>"$logFile"; then
exitError 115 "There was a problem while exporting EML from piler"
fi
printf "${ok}[%s] -- [SUCCESS] Exported EML files from piler --${norm}\n" \
"$(stamp)" >> "$logFile"
else
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if ! pilerexport -a "$exportStart" -b "$exportEnd" 2>>"$logFile"; then
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exitError 115 "There was a problem while exporting EML from piler"
fi
printf "${ok}[%s] -- [SUCCESS] Exported EML files from piler --${norm}\n" \
"$(stamp)" >> "$logFile"
fi
### pre-backup tasks completed -- move to borg tasks
printf "${ok}[%s] -- [SUCCESS] Pre-backup tasks completed --${norm}\n" \
"$(stamp)" >> "$logFile"
### Run borg variable checks
printf "${cyan}[%s] -- [INFO] Verifying supplied borg details --${norm}\n" \
"$(stamp)" >> "$logFile"
## verify borg base directory
if [ -z "${borgBaseDir}" ]; then
badDetails empty 'borgBaseDir'
elif [ ! -d "${borgBaseDir}" ]; then
badDetails dne 'borgBaseDir'
fi
printf "${magenta}details:borgBaseDir ${norm}-- ${ok}[OK]${norm}\n" \
>> "$logFile"
export BORG_BASE_DIR="${borgBaseDir%/}"
## check path to SSH keyfile
if [ -z "${borgSSHKey}" ]; then
badDetails empty 'borgSSHKey'
elif [ ! -f "${borgSSHKey}" ]; then
badDetails dne 'borgSSHKey'
fi
printf "${magenta}details:borgSSHKey ${norm}-- ${ok}[OK]${norm}\n" \
>> "$logFile"
export BORG_RSH="ssh -i ${borgSSHKey}"
## check borg repo connect string
if [ -z "${borgConnectRepo}" ]; then
badDetails empty 'borgConnectRepo'
fi
printf "${magenta}details:borgConnectRepo ${norm}-- ${ok}[OK]${norm}\n" \
>> "$logFile"
export BORG_REPO="${borgConnectRepo}"
## check borg repo password
if [ -n "${borgRepoPassphrase}" ]; then
printf "${magenta}details:borgRepoPassphrase ${norm}-- ${ok}[OK]${norm}\n" \
>> "$logFile"
export BORG_PASSPHRASE="${borgRepoPassphrase}"
else
# if passwd is blank intentionally, this is insecure
printf "${warn} -- [WARNING] Using a borg repo without a password is an " \
>> "$logFile"
printf "insecure configuration --${norm}\n" >> "$logFile"
warnCount=$((warnCount+1))
# if this was an accident, we need to provide a bogus passwd so borg fails
# otherwise it will sit forever just waiting for input
export BORG_PASSPHRASE="DummyPasswordSoBorgFails"
fi
## export borg remote path, if specified
if [ -n "${borgRemote}" ]; then export BORG_REMOTE_PATH="${borgRemote}"; fi
## read additional files
if [ -n "${borgXtraListPath}" ]; then
# check if file actually exists
if [ ! -f "${borgXtraListPath}" ]; then
badDetails dne 'borgXtraListPath'
fi
# read file contents into concatenated list for echo to cmdline
while read -r xtraItem; do
if [ -z "${xtraList}" ]; then
xtraList="${xtraItem}"
else
xtraList="${xtraList} ${xtraItem}"
fi
done <<EOF
$( sed -e '/^\s*#.*$/d' -e '/^\s*$/d' "${borgXtraListPath}" )
EOF
printf "${magenta}details:borgXtraListPath ${norm}-- ${ok}[OK]${norm}\n" \
>> "$logFile"
includeXtra=1
fi
## check if exlusion list file is specified
if [ -n "${borgExcludeListPath}" ]; then
# check if the file actually exists
if [ ! -f "${borgExcludeListPath}" ]; then
badDetails dne 'borgExcludeListPath'
fi
exclusions=1
fi
### create borg temp dir:
## python requires a writable temporary directory when unpacking borg and
## executing commands. This defaults to /tmp but many systems mount /tmp with
## the 'noexec' option for security. Thus, we will use/create a 'tmp' folder
## within the BORG_BASE_DIR and instruct python to use that instead of /tmp
# check if BORG_BASE_DIR/tmp exists, if not, create it
if [ ! -d "${borgBaseDir}/tmp" ]; then
if ! mkdir "${borgBaseDir}/tmp"; then
exitError 132 "Unable to create borg ${borgBaseDir}/tmp directory"
else
printf "${cyan}[%s] -- [INFO] Created ${yellow}%s/tmp " \
"$(stamp)" "${borgBaseDir}" >> "$logFile"
printf "${cyan}--${norm}\n" >> "$logFile"
fi
fi
export TMPDIR="${borgBaseDir}/tmp"
### execute borg depending on whether extra files and/or exclusions are defined
## construct the proper borg commandline
# base command
if [ "$exclusions" -eq 0 ]; then
borgCMD="borg --show-rc create ${borgCreateParams} \
::$(date +%Y-%m-%d_%H%M%S) \
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${exportDir}"
elif [ "$exclusions" -eq 1 ]; then
borgCMD="borg --show-rc create ${borgCreateParams} \
--exclude-from ${borgExcludeListPath} \
::$(date +%Y-%m-%d_%H%M%S) \
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${exportDir}"
fi
# add extra locations if defined
if [ "$includeXtra" -eq 1 ]; then
borgCMD="${borgCMD} ${xtraList}"
fi
# execute borg
printf "${cyan}[%s] -- [INFO] Executing borg backup operation --${norm}\n" \
"$(stamp)" >> "$logFile"
${borgCMD} 2>> "$logFile"
borgResult="$?"
## check borg exit status
if [ "$borgResult" -eq 0 ]; then
printf "${ok}[%s] -- [SUCCESS] Borg backup completed " \
"$(stamp)" >> "$logFile"
printf "successfully --${norm}\n" >> "$logFile"
elif [ "$borgResult" -eq 1 ]; then
printf "${warn}[%s] -- [WARNING] Borg completed with warnings. " \
"$(stamp)" >> "$logFile"
printf "Review this logfile for details --${norm}\n" >> "$logFile"
warnCount=$((warnCount+1))
elif [ "$borgResult" -ge 2 ]; then
err_1="Borg exited with a critical error. Please review this log file"
err_2="for details."
exitError 138 "$err_1 $err_2"
else
printf "${warn}[%s] -- [WARNING] Borg exited with unknown return code. " \
"$(stamp)" >> "$logFile"
printf "Review this logfile for details --${norm}\n" >> "$logFile"
warnCount=$((warnCount+1))
fi
### execute borg prune if paramters are provided, otherwise skip with a warning
if [ -n "${borgPruneSettings}" ]; then
printf "${cyan}[%s] -- [INFO] Executing borg prune operation --${norm}\n" \
"$(stamp)" >> "$logFile"
borg prune --show-rc -v ${borgPruneParams} ${borgPruneSettings} \
2>> "$logFile"
borgPruneResult="$?"
else
printf "${warn}[%s] -- [WARNING] No prune parameters provided. " \
"$(stamp)" >> "$logFile"
printf "Your archive will continue growing with each backup --${norm}\n" \
>> "$logFile"
warnCount=$((warnCount+1))
fi
## report on prune operation if executed
if [ -n "${borgPruneResult}" ]; then
if [ "${borgPruneResult}" -eq 0 ]; then
printf "${ok}[%s] -- [SUCCESS] Borg prune completed --${norm}\n" \
"$(stamp)" >> "$logFile"
elif [ "$borgPruneResult" -eq 1 ]; then
printf "${warn}[%s] -- [WARNING] Borg prune completed with warnings. " \
"$(stamp)" >> "$logFile"
printf "Review this logfile for details --${norm}\n" >> "$logFile"
warnCount=$((warnCount+1))
elif [ "$borgPruneResult" -ge 2 ]; then
err_1="Borg prune exited with a critical error. Please review this"
err_2="log file for details."
exitError 139 "$err_1 $err_2"
else
printf "${warn}[%s] -- [WARNING] Borg prune exited with an unknown " \
"$(stamp)" >> "$logFile"
printf "return code. Review this logfile for details --${norm}\n" \
>> "$logFile"
warnCount=$((warnCount+1))
fi
fi
### all processes successfully completed, cleanup and exit gracefully
# note successful completion of borg commands
printf "${ok}[%s] -- [SUCCESS] Backup operations completed --${norm}\n" \
"$(stamp)" >> "$logFile"
# cleanup
cleanup
# note complete success, tally warnings and exit
printf "${ok}[%s] -- [SUCCESS] All processes completed successfully --" \
"${norm}\n" \
"$(stamp)" >> "$logFile"
printf "${magenta}[%s] --- %s execution completed ---${norm}\n" \
"$(stamp)" "$scriptName" >> "$logFile"
if [ "$warnCount" -gt 0 ]; then
printf "${warn}%s warnings issued!${norm}\n" "${warnCount}" >> "$logFile"
else
printf "${ok}0 warnings issued.${norm}\n" >> "$logFile"
fi
exit 0
### error codes
# 1: parameter error
# 2: not run as root
# 3: borg not installed
# 99: TERM signal trapped
# 111: could not create tmp dir for EML dump from piler-export
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# 112: could not change to tmp dir to start export operation
# 115: problem during piler-export operation
# 130: null configuration variable in details file
# 131: invalid configuration variable in details file
# 138: borg exited with a critical error
# 139: borg prune exited with a critical error