openstack-ansible-os_zun/templates/systemd-docker-override.conf.j2

[Service]
ExecStart=
ExecStart=/usr/bin/dockerd --group {{ zun_system_group_name }} -H tcp://localhost:2375 -H unix:///var/run/docker.sock --cluster-store etcd://{% for item in groups['zun_api'] %}{{ hostvars[item]['ansible_host'] }}:2379{% if not loop.last %},{% endif %}{% endfor %}