[
  {
    "targets": [
{% for host in groups['node_exporter'] %}
{% if loop.last %}
      "{{ hostvars[host]['ansible_host'] }}"
{% else %}
      "{{ hostvars[host]['ansible_host'] }}",
{% endif %}
{% endfor %}
    ],
    "labels": {
      "host":"{{ hostvars[host]['ansible_host'] }}",
      "service":"ks3_monitor_system",
      "use":"icmp"
    }
  }
]