Initial commit - forked from the corresponding Smartfront repositories.

tools/backup.d/configs_backup.sh

@@ -0,0 +1,78 @@
+#!/bin/bash
+#
+# Backups the configuration files of this docker-composed service.
+# This is a general purpose worker script, doesn't requires customization.
+#
+# Author: Kovács Zoltán <kovacs.zoltan@smartfront.hu>
+# License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
+# 2021-09-03 v0.1 Initial release
+
+# Accepted environment variables and their defaults.
+PAR_BASEDIR=${PAR_BASEDIR:-""}                  # Service's base folder
+PAR_BACKUPDIR=${PAR_BACKUPDIR:-""}              # Folder to dump within
+
+# Other initialisations.
+BACKUPDIR="storage/backups/tarballs"            # Folder to dump within
+USER=${USER:-LOGNAME}                           # Fix for cron enviroment only
+YMLFILE="docker-compose.yml"
+
+# Messages.
+MSG_MISSINGDEP="Fatal: missing dependency"
+MSG_MISSINGYML="Fatal: didn't find the docker-compose.yml file"
+MSG_NONWRITE="The target directory isn't writable"
+
+# Checks the dependencies.
+TR=$(which tr 2>/dev/null)
+if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
+for item in date dirname hostname readlink tar
+do
+    if [ -n "$(which $item)" ]
+    then export $(echo $item | "$TR" '[:lower:]' '[:upper:]' | "$TR" '-' '_')=$(which $item)
+    else echo "$MSG_MISSINGDEP $item." >&2; exit 1; fi
+done
+
+# Where I'm?
+# https://gist.github.com/TheMengzor/968e5ea87e99d9c41782
+SOURCE="$0"
+while [ -h "$SOURCE" ]; do
+    # resolve $SOURCE until the file is no longer a symlink
+    SCRPATH="$( cd -P "$("$DIRNAME" "$SOURCE" )" && pwd )" #"
+    SOURCE="$("$READLINK" "$SOURCE")"
+    # if $SOURCE was a relative symlink, we need to resolve it
+    # relative to the path where the symlink file was located
+    [[ $SOURCE != /* ]] && SOURCE="$SCRPATH/$SOURCE"
+done; SCRPATH="$( cd -P "$("$DIRNAME" "$SOURCE" )" && pwd )" #"
+
+# Searches the base folder, containing a docker-compose.yml file.
+# Called from the base folder (./)?
+BASE_DIR="$PAR_BASEDIR"
+TEST_DIR="$SCRPATH"
+[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
+# Called from ./tools?
+TEST_DIR="$("$DIRNAME" "$TEST_DIR")"
+[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
+# Called from ./tools/*.d?
+TEST_DIR="$("$DIRNAME" "$TEST_DIR")"
+[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
+# On failure gives it up here.
+if [ -z "$BASE_DIR" -o ! -r "$BASE_DIR/$YMLFILE" ]; then
+    echo "$MSG_MISSINGYML" >&2; exit 1
+fi
+# Sets the absolute paths.
+BACKUPDIR="${PAR_BACKUPDIR:-$BASE_DIR/$BACKUPDIR}"
+
+# The dump target folder must be writable.
+[[ ! -w "$BACKUPDIR" ]] \
+&& echo "$MSG_NONWRITE: $BACKUPDIR" >&2 && exit 1
+
+# Tries the FS backup.
+if [ -w "$BACKUPDIR" ]; then
+    BACKUP_NAME="configs.$("$DATE" '+%Y%m%d_%H%M%S').$("$HOSTNAME")"
+    ( cd "$BASE_DIR"
+      "$TAR" czf "$BACKUPDIR/$BACKUP_NAME.tgz" \
+             "$YMLFILE" configs docker \
+	     2>>"$BACKUPDIR/$BACKUP_NAME.log"
+    )
+fi
+
+# That's all, Folks! :)