{% macro network_source(disk) -%}
                        <source protocol='{{ disk.protocol }}' name='{{ disk.volume }}'{% if disk.get('query') %} query='{{ disk.query }}'{% endif %}>
                          {%- for host in disk.get('hosts') %}
                          <host name='{{ host.name }}'{% if host.get("port") %} port='{{ host.port }}'{% endif %}/>
                          {%- endfor %}
                          {%- if disk.get("auth") %}
                          <auth username='{{ disk.auth.username }}'>
                            <secret type='{{ disk.auth.type }}' usage='{{ disk.auth.usage}}'/>
                          </auth>
                          {%- endif %}
                        </source>
{%- endmacro %}