How to install Docker Engine on Alpine Linux – Guide
1. Add the community repository to the APK repository file:
~ # vim / etc / apk / repositories Add the following line: http://dl-6.alpinelinux.org/alpine/edge/community Or, if you’re using a mirror, use the mirror’s URL, in my case: http://mirror1.hs-esslingen.de/pub/Mirrors/alpine/edge/community
2. Update the list of available software:
~ # apk update
3. Install Docker:
~ # apk add docker
4. Configure the docker daemon to start automatically on boot:
~ # rc-update add docker boot
5. Start the docker daemon:
~ # service docker start
6. Check if it is working:
~ # docker ps
The output should look like this:
CONTAINER ID IMAGE COMMAND CREATED PORT NAMES OF STATUS Great, I now have a Docker Daemon running. It’s time to build a simple container. I quickly created a very short Dockerfile and ran the docker build. After downloading some layers, it crashed with a very cryptic error message: Failed to register layer: ApplyLayer 1 exit status stdout: stderr: chmod / bin / mount: permission denied Googling this message led me to a lot of rabbit holes, but no final of accounts, it only takes a single command to make it disappear: sysctl -w kernel.grsecurity.chroot_deny_chmod = 0 This disables a security feature inside the kernel, therefore, might not be safe for a production environment that runs containers, but I think it’s acceptable for the machine that just builds them.
Final note
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