Installation

Run apk add docker
to install Docker on Alpine Linux.
The Docker package is in the 'Community' repository, so if the apk add fails with unsatisfiable constraints, you need to edit the /etc/apk/repositories file to add (or uncomment) a line like:
http://dl-6.alpinelinux.org/alpine/edge/community
或者：
添加
http://dl-cdn.alpinelinux.org/alpine/edge/main
http://dl-cdn.alpinelinux.org/alpine/edge/community

apk update
apk add docker

To start the Docker daemon at boot, run:
rc-update add docker boot

Then to start the Docker daemon manually, run:
service docker start

**Note: **You'll need to disable some kernel security flags in order to build images:
sysctl -w kernel.grsecurity.chroot_deny_chmod=0

sysctl -w kernel.grsecurity.chroot_deny_mknod=0

For more information, have a look at the corresponding Github issue.