How can I build a Docker image with Codebuild?

user_8494473 0
Viewed 5332

I want to build a docker image from a Dockerfile, and publish this image to an AWS ECR (Docker registry).

In order to succeed, I need to have access to docker build and docker push from within the Codebuild container, which is problematic (installing docker inside a docker container causes errors such as Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?).

How would one proceed to do such a thing please? Is there any way to use codebuild to build Docker images from a Dockerfile ?

docker-in-docker amazon-ecr aws-codebuild docker
3 Answers

I found a solution. Follow this link for the code, and don't forget to enable "Priviledged" in the "Environment" configuration screen.

user_84944730

The Docker sample for CodeDeploy lists the following steps:

  • For Image, choose aws/codebuild/standard:4.0.
  • Because you use this build project to build a Docker image, select Privileged.

and provides the following note:

Note

By default, Docker containers do not allow access to any devices. Privileged mode grants a build project's Docker container access to all devices. For more information, see Runtime Privilege and Linux Capabilities on the Docker Docs website.

If you are still having trouble, the PriviledgedMode section of the CloudFormation docs for AWS::CodeBuild::Project Environment has the following steps for initializing the Docker daemon:

You can initialize the Docker daemon during the install phase of your build by adding one of the following sets of commands to the install phase of your buildspec file:

If the operating system's base image is Ubuntu Linux:

- nohup /usr/local/bin/dockerd --host=unix:///var/run/docker.sock --host=tcp://0.0.0.0:2375 --storage-driver=overlay&

- timeout 15 sh -c "until docker info; do echo .; sleep 1; done"

If the operating system's base image is Alpine Linux and the previous command does not work, add the -t argument to timeout:

- nohup /usr/local/bin/dockerd --host=unix:///var/run/docker.sock --host=tcp://0.0.0.0:2375 --storage-driver=overlay&

- timeout -t 15 sh -c "until docker info; do echo .; sleep 1; done"

user_82102990

Just clic the 'privileged mode' button in the CodeBuild settings privileged mode

user_199794260
Related