add elasticsearch configuration and systemd

templates/conf/vmagent.yml.j2

@@ -515,3 +515,19 @@ scrape_configs:
 {% endfor %}
 
 {% endif %}
+{% if prometheus_elasticsearch_exporter_targets is defined %}
+  # Elasticsearch #
+  - job_name: elasticsearch
+    scrape_interval: 30s
+    static_configs:
+      - targets:
+{% for target in prometheus_elasticsearch_exporter_targets %}
+        - {{ target }}:9221
+{% endfor %}
+    relabel_configs:
+      - source_labels: [ __address__ ]
+        target_label: instance
+        regex: '(.*):9114'
+        replacement: '${1}'
+
+{% endif %}