Customizing docker on CoreOS

README.md

4 step to upadte the dev environment with docker-web

1. Replace the user-data file on your coreos-vagrant directory.
2. Run command: vagrant provision
3. Run command: vagrant reload
4. Open the docker-web site, have fun :)

btw: upgrade the coreos to latest stable version if possible. You need a vpn to complete this task, because the googleapis site was blocked in China.

3 step for this task:

• Connect your vpn (very important!!)
• In CoreOS Environment:

core@core-01 ~ $ sudo update_engine_client -check_for_update
core@core-01 ~ $ journalctl -fu  update-engine  # check the update status.

• If the update is complete, CoreOS will automatically reboot

user-data

#cloud-config

coreos:
  etcd:
    # generate a new token for each unique cluster from https://discovery.etcd.io/new
    # WARNING: replace each time you 'vagrant destroy'
    #discovery: https://discovery.etcd.io/<token>
    addr: $public_ipv4:4001
    peer-addr: $public_ipv4:7001
  fleet:
    public-ip: $public_ipv4
  units:
    - name: docker.service
      command: restart
      content: |
        [Unit]
        Description=Docker Application Container Engine
        Documentation=http://docs.docker.io
        Requires=docker.socket
        After=docker.socket

        [Service]
        Environment="TMPDIR=/var/tmp/"
        ExecStartPre=/bin/mount --make-rprivate /
        Environment=DOCKER_OPTS='--registry-mirror=http://d242e5a2.m.daocloud.io --insecure-registry=docker.curio.im'
        LimitNOFILE=1048576
        LimitNPROC=1048576
        # Run docker but don't have docker automatically restart
        # containers. This is a job for systemd and unit files.
        ExecStart=/usr/bin/docker --daemon --storage-driver=btrfs --host=fd:// --api-enable-cors=true $DOCKER_OPTS

        [Install]
        WantedBy=multi-user.target
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start
    - name: docker-tcp.socket
      command: start
      enable: true
      content: |
        [Unit]
        Description=Docker Socket for the API

        [Socket]
        ListenStream=2375
        Service=docker.service
        BindIPv6Only=both

        [Install]
        WantedBy=sockets.target