A j2 file for initilzing a MongoDB replica set. Needs an ansible inventory lists of hosts to work.

init-rs.js.j2

rs.initiate(
{
    _id: "{{ group_names[0] }}",
    members: [
        {% for h in groups[group_names[0] ]%}
          { _id: {{ loop.index }}, host : "{{ h }}":
            {%if hostvars[inventory_hostname].group_names[0].startswith('shard') %}
              {{ shard_port }}
            {% else %}
              {{ cfgserver_port }} 
            {% endif %}",
          priority: 1 } {% if not loop.last %},{% endif %}
        {% endfor %}        
    ]
});