![]() ![]() Some apps/code should be restricted from being able to change file permissions, execute external code, and more.īut this is not true for all. this might be a security risk.Īnd I want the CI/CD to rebuild the image anyway. I don't want to build with one user, then run with another. In my usual workflow, switching a user should rebuild the image because I want to verify that the build process works for any user that should install/run the image. The user is a parameter because all my dockers might run using the CI/CD users or other users.Īnd the Idea is to share files between the image and the OS without any permissions issues.Īlso, login into a Linux shell using one user and running the docker as another user (using the -user) is something I'm trying to avoid. ![]() If yes, I already have a perfect install done with my user from step one of the building. Once the process runs correctly inside the docker and passes all tests, I can decide whether to install it on my real machine. Installing using my user ID lets me simulate the standard installation of OS packages, PIP packages, and any other installation step required by the installing app/code. Not just running it after the build finished (as the -user imply) This way, you can create a user in the container with a matching UID and GID.Īdd the following lines to your Dockerfile:ĭuring this build process, I'm building the docker using my uid. Modify your Dockerfile to accept the host's UID and GID as arguments. Step 1: Adjust the Dockerfile to Accept UID and GID as Arguments Here are the steps to create and run a Docker container with a non-root user and password-less sudo permissions: Granting password-less sudo permissions to a non-root user allows you to perform administrative tasks without the risk of running the entire container as the root user. You may need elevated privileges for specific tasks. The same is valid for running the docker itself using unattended scripts. Running a docker build command that uses (mainly) a non-root user might force us to use sudo for some commands. To reduce these risks, we'll discuss running a Docker container with a custom non-root user that matches your host Linux user's user ID ( UID) and group ID ( GID), ensuring seamless permission handling for mounted folders. Beyond that, I can't think of any difference between running docker-compose as a user or root.Docker has become a popular platform for developers to create, deploy, and run applications in a portable, consistent environment.īy default, Docker containers run as the root user, which can pose security risks if the container becomes compromised.Īlso, running as root can be an issue when sharing folders between the host and the docker container. If you run docker-compose command as root or a different user, those host mounts may be a different path, and the files may be owned by a different UID, that may or may not map to the UID of your application inside the container. The reason I say "little difference" is that a compose file can configure host mounts that have a relative path. You configure this user in the Dockerfile, docker-compose.yml, or your docker run -u CLI. ![]() It's the equivalent of systemd running as root and launching a program as a non-root user. The important detail is to run applications inside of your container as a non-root user. The dockerd daemon is typically configured to run as root, the user accessing this API makes little difference (there is rootless mode currently in experimental). See this answer for details on how to give users this access. ![]() You can configure docker to allow non-root users to access this API, just be sure you trust these users with root access on your host, since the API gives that level of access. By default, this API is only accessible to the root user on linux, so you often see people running commands with sudo. The docker-compose command connects to the docker.sock, aka docker's API, to run all container commands. ![]()
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