kubespray/roles/etcd/templates/etcd2.j2

# etcd2.0
[Service]
{% if inventory_hostname in groups['kube-master'] %}
Environment="ETCD_ADVERTISE_CLIENT_URLS=http://{{ ansible_default_ipv4.address }}:2379,http://{{ ansible_default_ipv4.address }}:4001"
Environment="ETCD_INITIAL_ADVERTISE_PEER_URLS=http://{{ ansible_default_ipv4.address }}:2380"
Environment="ETCD_INITIAL_CLUSTER=master=http://{{ ansible_default_ipv4.address }}:2380"
Environment="ETCD_INITIAL_CLUSTER_STATE=new"
Environment="ETCD_INITIAL_CLUSTER_TOKEN=k8s_etcd"
Environment="ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379,http://0.0.0.0:4001"
Environment="ETCD_LISTEN_PEER_URLS=http://:2380,http://{{ ansible_default_ipv4.address }}:7001"
Environment="ETCD_NAME=master"
{% else %}
Environment="ETCD_ADVERTISE_CLIENT_URLS=http://0.0.0.0:2379,http://0.0.0.0:4001"
Environment="ETCD_INITIAL_CLUSTER=master=http://{{ groups['kube-master'][0] }}:2380"
Environment="ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379,http://0.0.0.0:4001"
Environment="ETCD_PROXY=on"
{% endif %}