ha etcd with calico

roles/etcd/templates/systemd-etcd2.service.j2

@@ -6,7 +6,11 @@ Conflicts=etcd.service
 User=etcd
 Environment=ETCD_DATA_DIR=/var/lib/etcd2
 Environment=ETCD_NAME=%m
+{% if inventory_hostname in groups['etcd'] %}
 ExecStart={{ bin_dir }}/etcd2
+{% else %}
+ExecStart={{ bin_dir }}/etcd2 -proxy on
+{% endif %}
 Restart=always
 RestartSec=10s
 LimitNOFILE=40000