add nginx exporter

defaults/main.yml

@@ -17,6 +17,7 @@ prometheus_repo_blackbox: prometheus
 prometheus_repo_memcached: prometheus
 prometheus_repo_mongodb: percona
 prometheus_repo_mysqld: prometheus
+prometheus_repo_nginx: tchivert
 prometheus_repo_node: prometheus
 prometheus_repo_opcache: tchivert
 prometheus_repo_phpfpm: Lusitaniae
@@ -49,6 +50,8 @@ prometheus_mongodb_exporter_database: "admin"
 prometheus_mongodb_exporter_host: "localhost"
 prometheus_mongodb_exporter_port: 27017
 
+prometheus_nginx_scrape_uri: "http://localhost/stub_status"
+
 prometheus_opcache_exporter_fcgi_uri: "unix:///var/run/www.sock"
 
 prometheus_phpfpm_sockets_directory: "/run/php/"

tasks/exporter/nginx.yml

@@ -0,0 +1,3 @@
+---
+- include_tasks: _common.yml
+  tags: ['prometheus_nginx_exporter']

tasks/main.yml

@@ -39,5 +39,6 @@
     - prometheus_opcache_exporter
     - prometheus_blackbox_exporter
     - prometheus_kong_exporter
+    - prometheus_nginx_exporter
   with_items:
     - "{{ prometheus_exporter_packages }}"

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

@@ -0,0 +1,12 @@
+[Unit]
+Description=Prometheus Nginx Exporter
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/prometheus-nginx-exporter \
+-nginx.scrape-uri {{ prometheus_nginx_scrape_uri }} \
+-web.listen-address=0.0.0.0:9113
+
+[Install]
+WantedBy=multi-user.target