user-data.erb

#cloud-config

coreos:
  etcd:
      #generate a new token for each unique cluster from https://discovery.etcd.io/new
      <%= @etcd_discovery %>
      addr: $public_ipv4:4001
      peer-addr: $public_ipv4:7001
  units:
    - name: etcd.service
      command: start
    - name: fleet.service
      command: start
    - name: docker-tcp.socket
      command: start
      enable: true
      content: |
        [Unit]
        Description=Docker Socket for the API
        [Socket]
        ListenStream=4243
        Service=docker.service
        BindIPv6Only=both
        [Install]
        WantedBy=sockets.target
    - name: database-data.service
      command: start
      enable: true
      content: |
        [Unit]
        Description=database data
        After=docker.service
        [Service]
        Type=oneshot
        RemainAfterExit=yes
        ExecStartPre=/usr/bin/docker pull paulczar/percona-galera:latest
        ExecStart=/bin/sh -c "/usr/bin/docker inspect database-data >/dev/null 2>&1 || docker run --name database-data -v /var/lib/mysql paulczar/percona-galera:latest true"
    - name: database.service
      command: <%= @command %>
      enable: true
      content: |
        [Unit]
        Description=database
        After=database-data.service
        [Service]
        Restart=always
        EnvironmentFile=/etc/environment
        TimeoutStartSec=20m
        ExecStartPre=/usr/bin/docker pull paulczar/percona-galera:latest
        ExecStart=/bin/sh -c "/usr/bin/docker run --name database --rm -p 3306:3306 -p 4444:4444 -p 4567:4567 -p 4568:4568 -e PUBLISH=3306 -e HOST=$COREOS_PRIVATE_IPV4 -e CLUSTER=galera --volumes-from database-data paulczar/percona-galera:latest"
        ExecStop=/usr/bin/docker stop database
write_files:
  - path: /etc/motd
    content: "Database Cluster Demo\n"
  - path: /etc/profile.d/db-functions.sh
    permissions: '0755'
    content: |
      function nse() {
        sudo nsenter --pid --uts --mount --ipc --net --target $(docker inspect --format="{{ .State.Pid }}" $1)
      }
      function dev_db() {
        eval `cat /etc/environment`
        /usr/bin/docker run -it -e DEBUG=1 -p 3306:3306 -p 4444:4444 -p 4567:4567 -p 4568:4568 -e PUBLISH=3306 -e HOST=$COREOS_PRIVATE_IPV4 -e CLUSTER=galera paulczar/percona-galera:latest bash
      }
      function database() {
        sudo nsenter --pid --uts --mount --ipc --net --target $(docker inspect --format="{{ .State.Pid }}" database)
      }
      function rebuild() {
        docker build -t paulczar/percona-galera /home/core/share
      }
      function cleanup() {
        etcdctl rm --recursive /database
      }