This is why we created fixuid, a tool to change a Docker container's user/group and file permissions that were set at build time to the UID/GID that the container was started with at runtime. There is no way to remap UIDs/GIDs using bind mounts so often development containers end up with a mismatch of UIDs/GIDs. Host volumes are mounted using bind mounts in Linux. There's an issue in the Moby repository with over 100 comments about this very topic. Host volumes, however, are owned by a user on the host and the host user's UID may or may not match the container user's UID. Users/groups, UIDs/GIDs, and file ownership must be decided when an image is built with docker build. This is where the road gets bumpy – Docker containers run as a single user.
#Gid development code#
Source code can be mounted into the development container via a host mount and changes can be immediately re-rendered via live-reload build tools. They usually include package managers, build tools, SDKs, remote debugging, and more. Developers are able to clone a repository, start a container or run Docker compose, and start contributing immediately.ĭevelopment containers are often very different from production containers. One of the most helpful things about using Docker containers for development is that it reduces developer onboarding time from a few days to a few hours or less. Introducing fixuid: Tool for Changing Docker Container UID/GID at Runtime
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