12/28/2021

Run Composer Install Inside Docker Container

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In many cases, the best solution is using containers. Docker is a framework that runs containers. A container is meant to run a specific daemon, and the software that is needed for that daemon to properly work. Docker does not virtualize a whole system; a container only includes the packages that are not included in the underlying system.

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The final step is to run the container you have just built using Docker: $ docker run -it -p 8000:8000 laravel-tutorial The command tells Docker to run the container and forward the exposed port 8000 to port 8000 on your local machine. Step 1: Create a container named dind-test with docker:dind image. Docker run -privileged -d -name dind-test docker:dind. Step 2: Log in to the container using exec. Docker exec -it dind-test /bin/sh. Now, perform steps 2 to 4 from the previous method and validate docker command-line instructions and image build. We will discuss both the methods here. Step by Step using CLI. Open a terminal and run the following command. Note that if you are not the root user, you need to add sudo before all the commands. Sudo docker run ubuntu bash -c “apt -y update”. This will check if an ubuntu image exists locally or not.

DockerOperating SystemOpen Source

After you have installed docker on your linux machine, the next step is to create an image and run a container. You need to create a base image of an OS distribution and after that you can add and modify the base image by installing packages and dependencies and committing the changes to it.

In this article, we will show you how to create an ubuntu base image and on top of that create intermediate image layers by adding packages in it and keep committing the changes. We will update the ubuntu base image, install 3 packages - vim editor, firefox and python 3.

Note that we can do this using two ways - either we mention all the commands inside a dockerfile and build the image all at once or we can do it step by step and keep committing the changes through CLI. We will discuss both the methods here.

Method 1. Step by Step using CLI.

  • Open a terminal and run the following command. Note that if you are not the root user, you need to add sudo before all the commands.

This will check if an ubuntu image exists locally or not. If it does not exist, it will display “Unable to find image 'ubuntu:latest' locally” message and start pulling it from docker hub. After pulling the image, it will run the apt update command.

  • We will now install a vim editor inside the container. For that, we will run the bash of the ubuntu image.

This will open an interactive ubuntu bash. Inside the bash, type the following commands one by one to install the packages.

The first command runs an update. It then installs vim editor, firefox and some dependencies for python 3. Then it adds the official python 3 repository and installs python 3.7 and then exits the bash.

You can check the version of python using the following command.

  • After exiting the bash, you need to commit the changes. Find out the container ID using the following command.

Run Composer Install Inside Docker Container

Copy the container ID and paste in the following command.

  • You can check that the new ubuntu image with the specified name and installed packages has been created using the following command.

Method 2. By creating a dockerfile

  • Create a file name dockerfile and place the following commands in it.

  • Build the image using the following command.

This command builds the docker image using the dockerfile.

Run the docker image using the following command.

To conclude, the better method to create an image and install packages is by creating a dockerfile with the appropriate commands because it will help you to keep track of the changes that you make and the packages that you install and gives a better clarity of the whole project.

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In this example we are going to run composer to install application dependencies then copy vendor folder and the rest of the application files into container image. With this way our image will always come with the application by default so all we have to do is create a container and start using it. This is a well known practise but I just wanted to touch upon a basic implementation. The main purpose is to isolate application code and not expose it to host OS. I am not going to list the benefits here because they all have been written on the Internet. The main problem with this solution is, the size of the final docker image will depend on the application and vendor folder size.

Run Composer Install Inside Docker Container Free


Structure


Files


I am just showing the content of important files. The rest is not too important.


Makefile



Run Composer Install Inside Docker Container Tracking

Dockerfile


.dockerignore



docker-compose.yaml


This is optional but I am leaving it if you want to use it. You could use $ make -sC docker/ build up command in project root if you don't want to use native docker commands as I am using. Up to you!


Run Composer Install Inside Docker Container Store

Build

Run composer install inside docker container organizer

Run Composer Install Inside Docker Container Space


Build image


Run Composer Install Inside Docker Container Organizer


Create container



Verify container content



If you run php src/index.php command inside container, it should work.

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