Generate docker-compose from running containers

docker2compose.sh

#!/bin/bash

# Папка для генерации
OUTPUT_DIR="docker-compose_projects"
mkdir -p $OUTPUT_DIR

# Собираем все контейнеры
docker ps --format '{{.Names}}' | while read CONTAINER; do
    # Получаем проект из лейбла
    PROJECT=$(docker inspect --format='{{index .Config.Labels "com.docker.compose.project"}}' $CONTAINER)
    [ -z "$PROJECT" ] && PROJECT="default"

    FILE="$OUTPUT_DIR/$PROJECT.yml"

    # Если файл ещё не существует, создаём заголовок
    if [ ! -f "$FILE" ]; then
        echo "version: '3.8'" > $FILE
        echo "services:" >> $FILE
    fi

    echo "  $CONTAINER:" >> $FILE
    IMAGE=$(docker inspect --format='{{.Config.Image}}' $CONTAINER)
    echo "    image: $IMAGE" >> $FILE

    # Command
    CMD=$(docker inspect --format='{{json .Config.Cmd}}' $CONTAINER)
    if [ "$CMD" != "null" ]; then
        echo "    command: $CMD" >> $FILE
    fi

    # Working dir
    WORKDIR=$(docker inspect --format='{{.Config.WorkingDir}}' $CONTAINER)
    [ -n "$WORKDIR" ] && echo "    working_dir: $WORKDIR" >> $FILE

    # User
    USER=$(docker inspect --format='{{.Config.User}}' $CONTAINER)
    [ -n "$USER" ] && echo "    user: $USER" >> $FILE

    # Hostname
    HOSTNAME=$(docker inspect --format='{{.Config.Hostname}}' $CONTAINER)
    [ -n "$HOSTNAME" ] && echo "    hostname: $HOSTNAME" >> $FILE

    # Порты
    PORTS=$(docker inspect --format='{{range $p, $conf := .NetworkSettings.Ports}}{{if $conf}}{{$p}}:{{(index $conf 0).HostPort}}{{end}} {{end}}' $CONTAINER)
    if [ -n "$PORTS" ]; then
        echo "    ports:" >> $FILE
        for PORT in $PORTS; do
            echo "      - \"$PORT\"" >> $FILE
        done
    fi

    # Томы
    VOLUMES=$(docker inspect --format='{{range .Mounts}}{{printf "%s:%s\n" .Source .Destination}}{{end}}' $CONTAINER)
    if [ -n "$VOLUMES" ]; then
        echo "    volumes:" >> $FILE
        while read VOL; do
            [ -n "$VOL" ] && echo "      - $VOL" >> $FILE
        done <<< "$VOLUMES"
    fi

    # Env
    ENV_VARS=$(docker inspect --format='{{range .Config.Env}}{{.}}{{"\n"}}{{end}}' $CONTAINER)
    if [ -n "$ENV_VARS" ]; then
        echo "    environment:" >> $FILE
        while read ENV; do
            [ -n "$ENV" ] && echo "      - $ENV" >> $FILE
        done <<< "$ENV_VARS"
    fi

    # Restart
    RESTART=$(docker inspect --format='{{.HostConfig.RestartPolicy.Name}}' $CONTAINER)
    [ -n "$RESTART" ] && [ "$RESTART" != "no" ] && echo "    restart: $RESTART" >> $FILE

    # Networks
    NETWORKS=$(docker inspect --format='{{range $k, $v := .NetworkSettings.Networks}}{{$k}} {{end}}' $CONTAINER)
    if [ -n "$NETWORKS" ]; then
        echo "    networks:" >> $FILE
        for NET in $NETWORKS; do
            echo "      - $NET" >> $FILE
        done
    fi

    # Labels
    LABELS=$(docker inspect --format='{{range $k,$v := .Config.Labels}}{{$k}}={{$v}}{{"\n"}}{{end}}' $CONTAINER)
    if [ -n "$LABELS" ]; then
        echo "    labels:" >> $FILE
        while read LAB; do
            [ -n "$LAB" ] && echo "      - $LAB" >> $FILE
        done <<< "$LABELS"
    fi

    echo "" >> $FILE
done

# Создаём секцию сетей для каждого файла (только реально используемые)
for FILE in $OUTPUT_DIR/*.yml; do
    echo "networks:" >> $FILE
    grep -Po '(?<=networks:\n)(\s+-\s+\S+)' $FILE | sed 's/^\s\+- //' | sort -u | while read NET; do
        echo "  $NET:" >> $FILE
    done
done

echo "Сгенерированы docker-compose файлы по проектам в папке $OUTPUT_DIR"