94 lines
3.3 KiB
Bash
94 lines
3.3 KiB
Bash
#!/bin/bash
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#
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# A service script to backup the web storage of a static website.
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# Creates a tarball in $BASE_DIR/storage/backups/tarballs folder
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# (by default). Optional parameters may change the source and/or
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# target folder.
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#
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# Author: Kovács Zoltán <kovacsz@marcusconsulting.hu>
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# License: GNU/GPL 3+ https://www.gnu.org/licenses/gpl-3.0.en.html
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# 2025-01-22 Initial version.
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# Accepted environment variables and their defaults.
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#
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PAR_BASEDIR=${PAR_BASEDIR:-""} # Service's base folder
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PAR_BACKUPDIR=${PAR_BACKUPDIR:-""} # Folder to dump within
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PAR_SOURCEDIR=${PAR_SOURCEDIR:-""} # Folder to save
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# Messages (maybe overridden by configuration).
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#
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MSG_MISSINGDEP="Fatal: missing dependency"
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MSG_NONREAD="The source directory isn't readable"
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MSG_NONWRITE="The target directory isn't writable"
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# Other initialisations.
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#
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BACKUPDIR="storage/backups/tarballs" # Folder to dump within
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SOURCEDIR="storage/volumes/staticweb" # Folder to backup
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USER=${USER:-LOGNAME} # Fix for cron enviroment only
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YMLFILE="docker-compose.yml"
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# Checks the dependencies.
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#
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TR=$(which tr 2>/dev/null)
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if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
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for item in basename cat cut date dirname hostname pwd tar
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do
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if [ -n "$(which $item)" ]
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then export $(echo $item | "$TR" '[:lower:]' '[:upper:]' | "$TR" '-' '_')=$(which $item)
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else echo "$MSG_MISSINGDEP $item." >&2; exit 1; fi
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done
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# All dependencies are available via "$THECOMMAND" (upper case) call.
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# Where I'm?
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# https://gist.github.com/TheMengzor/968e5ea87e99d9c41782
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SOURCE="$0"
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while [ -h "$SOURCE" ]; do
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# resolve $SOURCE until the file is no longer a symlink
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SCRPATH="$( cd -P "$("$DIRNAME" "$SOURCE" )" && echo "$PWD" )" #"
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SOURCE="$("$READLINK" "$SOURCE")"
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# if $SOURCE was a relative symlink, we need to resolve it
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# relative to the path where the symlink file was located
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[[ $SOURCE != /* ]] && SOURCE="$SCRPATH/$SOURCE"
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done; SCRPATH="$( cd -P "$("$DIRNAME" "$SOURCE" )" && echo "$PWD" )" #"
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# Searches the base folder, containing a docker-compose.yml file.
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#
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# Called from the base folder (./)?
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BASE_DIR="$PAR_BASEDIR"
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TEST_DIR="$SCRPATH"
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[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
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# Called from ./tools?
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TEST_DIR="$("$DIRNAME" "$TEST_DIR")"
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[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
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# Called from ./tools/*.d?
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TEST_DIR="$("$DIRNAME" "$TEST_DIR")"
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[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
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# On failure gives it up here.
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if [ -z "$BASE_DIR" -o ! -r "$BASE_DIR/$YMLFILE" ]; then
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echo "$MSG_MISSINGYML" >&2; exit 1
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fi
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# Sets the absolute paths.
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BACKUPDIR="${PAR_BACKUPDIR:-$BASE_DIR/$BACKUPDIR}"
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SOURCEDIR="${PAR_SOURCEDIR:-$BASE_DIR/$SOURCEDIR}"
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# The dump target folder must be writable.
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#
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[[ ! -w "$BACKUPDIR" ]] \
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&& echo "$MSG_NONWRITE: $BACKUPDIR" >&2 && exit 1
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# The source folder must be readable.
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#
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[[ ! -r "$SOURCEDIR" ]] \
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&& echo "$MSG_NONREAD: $SOURCEDIR" >&2 && exit 1
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# Tries the FS backup.
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#
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if [ -w "$BACKUPDIR" ]; then
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BACKUP_NAME=$("$BASENAME" "$SOURCEDIR").$("$DATE" '+%Y%m%d_%H%M%S').$("$HOSTNAME")
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(cd $SOURCEDIR; "$TAR" cz . \
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> "$BACKUPDIR/$BACKUP_NAME.tgz" 2>>"$BACKUPDIR/$BACKUP_NAME.log")
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fi
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# That's all, Folks! :)
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