etcd:
  image: rancher/etcd:v2.3.3
  command: node ${REPLICAS}
  labels:
    io.rancher.sidekicks: data
    # try not to schedule etcd nodes on the same host
    io.rancher.scheduler.affinity:container_label_soft_ne: etcd=node
    etcd: node
  expose:
    - "2379"
    - "2380"
  environment:
    ETCDCTL_ENDPOINT: http://etcd:2379
  volumes_from:
    - data
# containerize data volume to enable restarts and upgrades
data:
  image: busybox
  command: /bin/true
  net: none
  volumes:
    - /data
  labels:
    io.rancher.container.start_once: 'true'

# Discovery containers are used for bootstrapping a cluster.
# They will shutdown once this process is completed.
etcd-discovery:
  image: rancher/etcd:v2.3.3
  command: discovery_node
  labels:
    io.rancher.container.start_once: 'true'
    io.rancher.sidekicks: bootstrap
bootstrap:
  image: rancher/etcd:v2.3.3
  command: bootstrap ${REPLICAS}
  links:
    - etcd-discovery
  labels:
    io.rancher.container.start_once: 'true'