コンテンツのバックアップ

コンテンツをバックアップするスクリプトを書き上げてから、こんな単純な要求に対して複雑すぎる……感が半端ない。無駄かー

1. （テストで）「/etc/」以下と、「/var/log/」以下をバックアップ
2. バックアップは25日間保存
3. 「/srv/contents-backup-datastore」以下に、「tar czf」でバックアップ

#!/bin/bash

set -e
set -u

BACKUPDIR="/srv/contents-backup-datastore"
# 25 days (24 * 25 = 600 hours)
SAVED=600

TARGETS=("/etc" "/var/log")

LOCKFILE="/var/run/contents_backup.lock"
RETRIES=3
SLEEPTIME=15
# 1 hours (60 * 60 * 1 = 3600sec)
LOCKTIMEOUT=3600

SELFID=`id | sed -e 's/uid=//' -e 's/(.*//'`
if [ $SELFID -ne 0 ]; then
    # failed
    ERRMSG="You are not root, You cannot execute this script."
    echo $ERRMSG 1>&2
    exit 100
fi

# Require lockfile command in procmail package.
lockfile -${SLEEPTIME} -r $RETRIES -l $LOCKTIMEOUT $LOCKFILE >/dev/null 2>&1
if [ $? -ne 0 ] ; then
    # lock failed.
    ERRMSG="Contents backup - Still running."
    echo $ERRMSG
    exit 1
fi

TMPDIR=/tmp/contents-backup.$$
mkdir -p $TMPDIR

trap "exit 1" HUP INT PIPE QUIT TERM
trap "rm -f ${TMPDIR}/*.tar.gz; rmdir ${TMPDIR}; rm -f ${LOCKFILE}" EXIT

TODAY=`date +%Y%m%d`

for URI in ${TARGETS[@]}
do
    FNAME=`echo $URI | sed 's!/!_!g'`
    BACKUP=${TMPDIR}/${FNAME}.${TODAY}.tar.gz
    tar czf $BACKUP $URI >/dev/null 2>&1
    if [ $? -eq 0 ]; then
        echo "Successful in the preparation of the contents backup: ${FNAME}"
    else
        # warning
        $ERRMSG "Failed in the preparation of the contents backup: ${FNAME}"
        echo $ERRMSG 1>&2
    fi
done

if [ ! -d $BACKUPDIR ]; then
    # failed
    ERRMSG="Contents of backup does not exist: ${BACKUPDIR}"
    echo $ERRMSG 1>&2
    exit 200
fi

/usr/sbin/tmpwatch $SAVED $BACKUPDIR
if [ "$(ls -A ${TMPDIR}/*.tar.gz)" ]; then
    mv ${TMPDIR}/*.tar.gz ${BACKUPDIR}/
fi

echo "Backup of the contents on server was completed."