add elasticsearch configuration and systemd

tasks/exporter/services/elasticsearch.yml

@@ -0,0 +1,3 @@
+---
+- include_tasks: ../common.yml
+  tags: ['prometheus_elasticsearch_exporter']

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 %}

templates/systemd/prometheus-elasticsearch-exporter.service.j2

@@ -0,0 +1,10 @@
+[Unit]
+Description=Prometheus Elasticsearch Exporter
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/prometheus-elasticsearch-exporter {% if prometheus_elasticsearch_user is defined %}--es.uri="http://{{ prometheus_elasticsearch_user }}:{{ prometheus_elasticsearch_password }}@localhost:9200"{% endif %}
+
+[Install]
+WantedBy=multi-user.target