Laravel Dockerfile > 1GB

Question

I'm building a Docker Image for my Laravel application but it's getting bigger than 1GB. This is the Dockerfile:

#
# PHP Dependencies
#
FROM composer as vendor

COPY database/ database/
COPY composer.json composer.json
COPY composer.lock composer.lock

RUN composer install \
    --ignore-platform-reqs \
    --no-interaction \
    --no-plugins \
    --no-scripts \
    --prefer-dist

#
# Application
#
FROM php:fpm-alpine
RUN apk add --no-cache --virtual .build-deps \
        $PHPIZE_DEPS \
        curl \
        libtool \
        libxml2-dev \
    && apk add --no-cache \
        curl \
        git \
        mysql-client \
    && pecl install redis \
    && docker-php-ext-install \
        pdo \
        pdo_mysql \
        tokenizer \
        bcmath \
        opcache \
        xml \
    && apk del -f .build-deps \
    && docker-php-ext-enable \
       pdo_mysql \
       redis

WORKDIR /var/www/html

COPY . /var/www/html
COPY --from=vendor /app/vendor/ /var/www/html/vendor/
COPY .env.staging /var/www/html/.env

RUN chown -R root:www-data . 

EXPOSE 9000

CMD ["php-fpm"]

I use Vue as front-end and Redis as caching provider.

I am used to images around the 200-300 MBs but this is ridiculous.

What can I do to reduce the image size?

Thanks in advance.

It's hard to say without knowing exactly what you're copying into that container and what dependencies you have in your composer.json files, but have you considered using [Volumes](https://docs.docker.com/storage/volumes/#choose-the--v-or---mount-flag)? Are you using this image strictly for Development purposes? Or do you plan on deploying it somewhere like Kubernetes or an ECS service? — maiorano84, Apr 12 '20 at 21:02
`docker history` will give you some hints as to which specific Dockerfile step is taking up space; you should also be able to run commands like `du` (for example `docker run --rm yourimage du -k /usr`) to see where space is going. — David Maze, Apr 12 '20 at 22:28
What have you tried to find the cause for that size? How **exactly** did you measure the size? — Nico Haase, Apr 13 '20 at 10:54

Yasen · Answer 1 · 2020-04-13T14:50:13.053

Since docker filesystem is OverlayFS, you need a special tool to dive into FS layers.

There are many tools to explore images. For your case I'd suggest wagoodman/dive: A tool for exploring each layer in a docker image

docker run --rm -it \ 
  -v /var/run/docker.sock:/var/run/docker.sock \
  wagoodman/dive:latest \
  <image_name|image_id>

A tool for exploring a docker image, layer contents, and discovering ways to shrink your Docker image size.

As you can see on the screenshot - Layers table has Size column.

So, you can find - which layer of your docker image has the greatest contribution to the volume of the final image.

Please add some explanation to your answer - how does this tool reduce the size of an image? — Nico Haase, Apr 13 '20 at 10:55

Laravel Dockerfile > 1GB

1 Answers1