etcd:
      charm: "cs:~containers/etcd"
{% if k8.feature.loadbalancer %}
      num_units: 3
{% else %}
      num_units: 1
{% endif %}
      to:
{% if k8.feature.loadbalancer %}
{% for unit_id in to_select() %}
        - "nodes/{{ unit_id }}"
{% endfor %}
{% else %}
        - "nodes/0"
{% endif %}