Docker
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-cdn.alpinelinux.org/alpine/latest-stable/community
then run apk update to index the repository.
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: **On older version of Alpine Linux with older version of docker you'll also 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
Anyway, this weakening of security is not necessary to do with Alpine 3.4.x and Docker 1.12 as of August 2016 anymore.
Docker Compose
To install docker-compose, first install pip:
apk add py-pip
Since docker-compose version 1.24.0, you also need some dev dependencies:
apk add python-dev libffi-dev openssl-dev gcc libc-dev make
Then install docker-compose, run:
pip install docker-compose
Isolate containers with a user namespace
adduser -SDHs /sbin/nologin dockremap
addgroup -S dockremap
echo dockremap:$(cat /etc/passwd|grep dockremap|cut -d: -f3):65536 >> /etc/subuid
echo dockremap:$(cat /etc/passwd|grep dockremap|cut -d: -f4):65536 >> /etc/subgid
and add in /etc/docker/daemon.json
{
"userns-remap": "dockremap"
}
You may also consider these options : '
"experimental": false,
"live-restore": true,
"ipv6": false,
"icc": false,
"no-new-privileges": false
