feat: add "Plus" mode flag for nginx_exporter

Signed-off-by: anviar <oleg.kluchkin+github@gmail.com>

roles/nginx_exporter/defaults/main.yml

@@ -6,6 +6,7 @@ nginx_exporter_binary_url: "https://github.com/{{ _nginx_exporter_repo }}/releas
 nginx_exporter_checksums_url: "https://github.com/{{ _nginx_exporter_repo }}/releases/download/v{{ nginx_exporter_version }}/\
                           nginx-prometheus-exporter_{{ nginx_exporter_version }}_checksums.txt"
 nginx_exporter_skip_install: false
+nginx_exporter_plus: false
 nginx_exporter_scrape_uri: "http://127.0.0.1/stub_status"
 nginx_exporter_web_listen_address: "0.0.0.0:9113"
 nginx_exporter_web_telemetry_path: "/metrics"

roles/nginx_exporter/meta/argument_specs.yml

@@ -15,6 +15,10 @@ argument_specs:
         description: "nginx_exporter installation tasks gets skipped when set to true."
         type: bool
         default: false
+      nginx_exporter_plus:
+        description: "Start the exporter for NGINX Plus."
+        type: bool
+        default: false
       nginx_exporter_binary_local_dir:
         description:
           - "Enables the use of local packages instead of those distributed on github."

roles/nginx_exporter/templates/nginx_exporter.service.j2

@@ -14,6 +14,9 @@ ExecStart={{ nginx_exporter_binary_install_dir }}/nginx-prometheus-exporter \
     '--web.telemetry-path={{ nginx_exporter_web_telemetry_path }}' \
 {% if nginx_exporter_tls_server_config | length > 0 or nginx_exporter_http_server_config | length > 0 or nginx_exporter_basic_auth_users | length > 0 %}
     '--web.config.file=/etc/nginx_exporter/web_config.yaml' \
+{% endif %}
+{% if nginx_exporter_plus %}
+    '--nginx.plus' \
 {% endif %}
     '--log.level={{ nginx_exporter_log_level }}' \
     '--log.format={{ nginx_exporter_log_format }}'