How to connect Docker to CoreOS in Veertu

coreos-docker-veertu.md

How to connect Docker to CoreOS in Veertu

Mostly copied from http://qiita.com/A-I/items/f6f4b1b50fed9db739df

Install Veertu and download and start the CoreOS image.

Set a password for user core

$ sudo passwd core

Get the ip address

$ ifconfig ens3

Ssh into CoreOS

$ ssh core@192.168.64.8 -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no

Upgrade CoreOS

Create a cloud-config.yml file to upgrade CoreOS, add your ssh key and open the docker socket when CoreOS starts:

#cloud-config

ssh_authorized_keys:
  - ssh-rsa AAAAB6NzaC1yc2EAAAABIwAAAQEA6NF8iallvQVp22WDkTkyrtvp9eWW6A8YVr+kz4TjGYe7gHzIw+niNltGEFHzD8+v1I2YJ6oXevct1YeS0o9HZyN1Q9qgCgzUFtdOKLv6IedplqoPkcmF0aYet2PkEDo3MlTBckFXPITAMzF8dJSIFo9D8HfdOV0IAdx4O7PtixWKn5y2hMNG0zQPyUecp4pzC6kivAIhyfHilFR61RGL+GPXQ2MWZWFYbAGjyiYJnAmCP3NOTd0jMZEnDkbUvxhMmBYSdETk1rRgm+R4LOzFUGaHqHDLKLX+FIPKcF96hrucXzcWyLbIbEgE98OHlnVYCzRdK8jlqm8tehUc9c9WhQ== my@public.key

coreos:
  units:
    - name: docker-tcp.socket
      command: start
      runtime: no
      content: |
        [Unit]
        Description=Docker Socket for the API
        [Socket]
        ListenStream=2375
        Service=docker.service
        BindIPv6Only=both
        [Install]
        WantedBy=sockets.target

    - name: docker.service
      command: start

My mac has docker 1.9.1 and docker 1.9.1 is in the CoreOS beta channel, so lets upgrade to that.

Install the current beta CoreOS to /dev/sda with our cloud config:

$ sudo coreos-install -d /dev/sda -V current -C beta -c cloud-config.yml

$ sudo reboot

Set the docker host

$ export DOCKER_HOST=tcp://192.168.64.8:2375

Check if it works

$ docker info

Works great, thanks!