Posted by I’ve been playing with docker lately and usually I want to have the latest version available as it brings bug fixes and enhancements, but I find that docker is released so quickly that the distribution releases lag behind the latest version a little bit. Since I’ve had to repeat this process twice, I figured I’d document it and since I’m documenting it, I’d create a post. There is nothing groundbreaking here, but it should get you up and running with the latest version of docker quickly. The commands could be added to a simple bash script or you could create a Puppet manifest out of them. See here for more info on installing Docker on CentOS.
Installing Docker
Download the latest version of docker:
curl -o /usr/bin/docker https://get.docker.com/builds/Linux/x86_64/docker-latest
Make the docker binary executable:
chmod +x /usr/bin/docker
We need to get some systemd files from here.
Download docker.service into the systemd directory:
curl -o /etc/systemd/system/docker.service https://raw.githubusercontent.com/docker/docker/master/contrib/init/systemd/docker.service
Download docker.socker into the systemd directory:
curl -o /etc/systemd/system/docker.socket https://raw.githubusercontent.com/docker/docker/master/contrib/init/systemd/docker.socket
Enable the docker service
systemctl enable docker.service
Start docker
systemctl start docker.service
Verify the docker version (1.6.1 at this time):
docker -v
Docker version 1.6.1, build 97cd073
Here are each of the commands:
curl -o /usr/bin/docker https://get.docker.com/builds/Linux/x86_64/docker-latest
chmod +x /usr/bin/docker
curl -o /etc/systemd/system/docker.service https://raw.githubusercontent.com/docker/docker/master/contrib/init/systemd/docker.service
curl -o /etc/systemd/system/docker.socket https://raw.githubusercontent.com/docker/docker/master/contrib/init/systemd/docker.socket
systemctl enable docker.service
systemctl start docker.service
Create a new image and container
Create a simple Dockerfile with the contents of:
FROM ubuntu:14.04
MAINTAINER Chris Greene <chris@vmware.local>
ENV REFRESHED_AT 05_12_2015
RUN apt-get -yqq update
RUN apt-get -yqq install
Build the docker image:
docker build -t chrisgreene/test .
View images:
docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
chrisgreene/test latest 4b88ac6b0f60 2 minutes ago 209.1 MB
ubuntu 14.04 07f8e8c5e660 12 days ago 188.3 MB
Create a container from the image:
docker run -it chrisgreene/test /bin/bash
View some info in the container:
cat /etc/os-release
NAME=”Ubuntu”
VERSION=”14.04.2 LTS, Trusty Tahr”
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME=”Ubuntu 14.04.2 LTS”
VERSION_ID=”14.04″
HOME_URL=”http://www.ubuntu.com/”
SUPPORT_URL=”http://help.ubuntu.com/”
BUG_REPORT_URL=”http://bugs.launchpad.net/ubuntu/”
If you’d like a book on docker but are worried about it getting out of date quickly, checkout James Turnbull’s “The Docker Book“. When docker 1.5 came out I received an email from James on the same day announcing that version 1.5 of his book was out. The home page still list v1.5 but on the downloads page it is v1.6.
orchestration.io 