Docker #4 : Build Docker from sources


Docker is still in developpement. I'm experiencing bug #4068 which been corrected on master but not else in Ubuntu 14.04 packages. I will build Docker from sources with... Docker itself.

Prepare environnement

First, we must install Docker and git on our system, link binary named to /usr/local/bin/docker. Finally, to avoid uses root or sudo to each Docker relative commands add your user to docker group.

sudo aptitude install git
sudo ln -s /usr/bin/ /usr/local/bin/docker
sudo usermod -G docker -a tletou

We must logout and login to applied new group membership.

Start building (as normal user)

These commands clone docker's sources, downloads some base images for building.

git clone
cd docker
make build

These commands build Docker binary.

make binary

We must see this victory message :

---> Making bundle: binary (in bundles/0.12.0-dev/binary)
Created binary: /go/src/

Our new docker command should be in bundles/0.12.0-dev/binary

tletou@aquarius:~/LPO/virt/docker/docker$ ls -l bundles/0.12.0-dev/binary/
total 17180
lrwxrwxrwx 1 root root       17 juin   8 15:17 docker -> docker-0.12.0-dev
-rwxr-xr-x 1 root root 17582674 juin   8 15:17 docker-0.12.0-dev
-rw-r--r-- 1 root root       52 juin   8 15:17 docker-0.12.0-dev.md5
-rw-r--r-- 1 root root       84 juin   8 15:17 docker-0.12.0-dev.sha256

Use it

We will remove our link to package provided binary from /usr/local/bin and linking to our new binary.

sudo rm /usr/local/bin/docker
sudo ln -s $PWD/bundles/0.12.0-dev/binary/docker-0.12.0-dev /usr/local/bin/docker
# For compatibility with previous scripts and posts
sudo ln -s $PWD/bundles/0.12.0-dev/binary/docker-0.12.0-dev /usr/local/bin/

Stop docker service and edit /etc/default/ to point our new binary

sudo service stop
sudo vim /etc/default/

Uncomment line:


Start service

sudo service start
docker -v
Docker version 0.12.0-dev, build 0c611d9

That's all falks.

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