Docker-Composeで作成したコンテナのボリューム、DBをバックアップするシェルスクリプト。DBのコンテナ名は命名規則を適用する前提

docker-compose_backup.sh

#/bin/bash
#
# Cronで動かすときはPATHを設定すること。
# 例：）PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

get_contenner_service_name(){
        echo $1 | cut -d"_" -f2- | rev | cut -c 3- | rev
}
mysql_contenner_backup(){
        target_contenner=$1
        mysql_contenner_service_name=`get_contenner_service_name ${target_contenner}`
        mysql_dump_name=${mysql_contenner_service_name}_dumpall.sql
        echo "MySQLバックアップ開始:${mysql_contenner_service_name}"
        docker exec -i ${target_contenner} /bin/sh -c 'exec mysqldump --all-databases -uroot -p"$MYSQL_ROOT_PASSWORD"' > ${backup_dir}/${mysql_dump_name}
        if [ $? -ne 0 -o ! -e ${backup_dir}/${mysql_dump_name} -o ! -s ${backup_dir}/${mysql_dump_name} ]; then
                echo "mysqlバックアップに失敗:${mysql_contenner_service_name}"
                exit 1
        fi
        echo "MySQLバックアップ終了:${mysql_contenner_service_name}"
}
pgsql_contenner_backup(){
        target_contenner=$1
        pgsql_contenner_service_name=`get_contenner_service_name ${target_contenner}`
        pgsql_dump_name=${pgsql_contenner_service_name}_dumpall.sql
        echo "PostgreSQLバックアップ開始:${pgsql_contenner_service_name}"
        docker exec -i ${target_contenner} /bin/sh -c 'pg_dumpall -U $POSTGRES_USER' > ${backup_dir}/${pgsql_dump_name}
        if [ $? -ne 0 -o ! -e ${backup_dir}/${pgsql_dump_name} -o ! -s ${backup_dir}/${pgsql_dump_name} ]; then
                echo "postgresqlバックアップに失敗:${pgsql_contenner_service_name}"
                exit 1
        fi
        echo "PostgreSQLバックアップ終了:${pgsql_contenner_service_name}"
}
contenner_backup(){
        target_contenner=$1
        target_contenner_service_name=`get_contenner_service_name ${target_contenner}`
        echo "Dockerコンテナ終了:${target_contenner_service_name}"
        docker-compose stop ${target_contenner_service_name}
        if [ $? -ne 0 ]; then
                echo "Dockerコンテナ終了に失敗：${target_contenner_service_name}"
                exit 1
        fi
        docker run --rm --volumes-from ${target_contenner} -v ${backup_dir}:/backup -e TAR_OPTS="--verbose" akira345/docker-backup backup ${target_contenner}.tar.xz
        if [ $? -ne 0 ]; then
                echo "Dockerコンテナバックアップに失敗：${target_contenner_serivce_name}"
                exit 1
        fi
        echo "Dockerコンテナ起動:${target_contenner_service_name}"
        docker-compose start ${target_contenner_service_name}
}

### Main
target_contenners=$(docker-compose ps | tail -n +3 | cut -d " " -f1)

backup_dir=$(pwd)/backup
mkdir -p ${backup_dir}
echo ${target_contenners}
echo "start : `date +'%Y/%m/%d %H:%M:%S'`"

if [ -n "${target_contenners}" ]; then
        echo "バックアップ開始"

        for target_contenner in ${target_contenners};
        do
                #PostgreSQL、MySQLコンテナ名に一致するように修正すること
                if [[ ${target_contenner} =~ pgsql|postgresql ]]; then
                        pgsql_contenner_backup ${target_contenner}
                elif [[ ${target_contenner} =~ mysql ]]; then
                        mysql_contenner_backup ${target_contenner}
                else
                        contenner_backup ${target_contenner}
                fi
        done
        echo "END"
fi
echo "end : `date +'%Y/%m/%d %H:%M:%S'`"
exit 0