How to install packages from Docker compose? - docker

Question

Hi there I am new to Docker. I have an docker-compose.yml which looks like this:
version: "3"
services:
lmm-website:
image: lmm/lamp:php${PHP_VERSION:-71}
container_name: ${CONTAINER_NAME:-lmm-website}
environment:
HOME: /home/user
command: supervisord -n
volumes:
- ..:/builds/lmm/website
- db_website:/var/lib/mysql
ports:
- 8765:80
- 12121:443
- 3309:3306
networks:
- ntw
volumes:
db_website:
networks:
ntw:
I want to install the Yarn package manager from within the docker-compose file:
sudo apt-get update && sudo apt-get install yarn
I could not figure out how to declare this, I have tried
command: supervisord -n && sudo apt-get update && sudo apt-get install yarn
which fails silently. How do I declare this correctly? Or is docker-compose.yml the wrong place for this?

Answer 1

Why not use Dockerfile which is specifically designed for this task?
Change your "image" property to "build" property to link a Dockerfile.
Your docker-compose.yml would look like this:
services:
lmm-website:
build:
context: .
dockerfile: Dockerfile
container_name: ${CONTAINER_NAME:-lmm-website}
environment:
HOME: /home/user
command: supervisord -n
volumes:
- ..:/builds/lmm/website
- db_website:/var/lib/mysql
ports:
- 8765:80
- 12121:443
- 3309:3306
networks:
- ntw
volumes:
db_website:
networks:
Then create a text file named Dockerfile in the same path as docker-compose.yml with the following content:
FROM lmm/lamp:php${PHP_VERSION:-71}
RUN apt-get update && apt-get install -y bash
You can add as much SO commands as you want using Dockerfile's RUN (cp, mv, ls, bash...), apart from other Dockerfile capabilities like ADD, COPY, etc.
+info:
https://docs.docker.com/engine/reference/builder/
+live-example:
I made a github project called hello-docker-react. As it's name says is a docker-react box, and can serve you as an example as I am installing yarn plus other tools using the procedure I explained above.
In addition to that, I also start yarn using an entrypoint bash script linked to docker-compose.yml file using docker-compose entrypoint property.
https://github.com/lopezator/hello-docker-react

Answer 2

You can only do it with a Dockerfile, because the command operator in docker-compose.yml only keeps the container alive during the time the command is executed, and then it stops.

Answer 3

Try this
command: supervisord -n && apt-get update && apt-get install yarn
Because sudo doesn't work in docker.

Answer 4

My first time trying to help out:
would like you to give it a try (I found it on the internet)
FROM lmm/lamp:php${PHP_VERSION:-71}
USER root
RUN apt-get update && apt-get install -y bash