kubespray/roles/etcd/templates/etcd.j2

ETCD_DATA_DIR=/var/lib/etcd
ETCD_ADVERTISE_CLIENT_URLS={{ etcd_client_url }}
ETCD_INITIAL_ADVERTISE_PEER_URLS={{ etcd_peer_url }}
ETCD_INITIAL_CLUSTER_STATE={% if etcd_cluster_is_healthy.rc != 0 | bool %}new{% else %}existing{% endif %}

ETCD_LISTEN_CLIENT_URLS=http://{{ etcd_address }}:2379
ETCD_ELECTION_TIMEOUT=10000
ETCD_INITIAL_CLUSTER_TOKEN=k8s_etcd
ETCD_LISTEN_PEER_URLS=http://{{ etcd_address }}:2380
ETCD_NAME={{ etcd_member_name }}
ETCD_PROXY=off
ETCD_INITIAL_CLUSTER={% for host in groups['etcd'] %}etcd{{ loop.index|string }}={{ hostvars[host]['etcd_peer_url'] }}{% if not loop.last %},{% endif %}{% endfor %}