knot/exporter: init

knot-dns/exporter.sls

+include:
+  - apt.repository.knot-dns
+  - ferm
+
+knot-exporter:
+  pkg.installed: []
+  service.running:
+    - enable: True
+    - reload: True
+    - require:
+      - file: /etc/systemd/system/knot-exporter.service
+    - watch:
+      - file: /etc/systemd/system/knot-exporter.service
+      - pkg: knot-exporter
+
+/etc/systemd/system/knot-exporter.service:
+  file.managed:
+    - source: salt://knot/files/knot-exporter.service.j2
+    - user: root
+    - group: root
+    - mode: '0644'
+    - template: jinja
+
+/etc/ferm/conf.d/40-knot-exporter.conf:
+  file.managed:
+    - source: salt://knot-dns/files/ferm-knot-exporter.conf.j2
+    - user: root
+    - group: root
+    - mode: '0644'
+    - template: jinja
+    - require:
+      - file: /etc/ferm/conf.d
+
+prometheus_knot_export:
+  grains.present:
+    - value: {{ grains.nodename }}:9433

knot-dns/files/ferm-knot-exporter.conf.j2

+domain (ip ip6) {
+  table filter {
+    chain INPUT {
+      proto tcp dport (9433) saddr (185.206.209.130 2a0f:3786:11:7::1) ACCEPT;
+    }
+  }
+}

knot-dns/files/knot-exporter.service.j2

+[Unit]
+Description=Knot Prometheus Exporter
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/sbin/knot-exporter/knot-exporter --web-listen-addr ::
+
+[Install]
+WantedBy=multi-user.target

knot-dns/init.sls

@@ -3,6 +3,7 @@
 include:
   - apt.repository.knot-dns
   - ferm
+  - .exporter
 
 knot:
   pkg.installed:

prometheus/files/prometheus/prometheus.yml

@@ -60,6 +60,8 @@ scrape_configs:
           - /etc/prometheus/targets/grafana.yml
 
   - job_name: unbound
+    scrape_interval: 5s
+    scrape_timeout: 2s
     file_sd_configs:
       - files:
           - /etc/prometheus/targets/unbound.yml
@@ -97,3 +99,11 @@ scrape_configs:
     file_sd_configs:
       - files:
           - /etc/prometheus/targets/varnish.yml
+
+  - job_name: knot
+    scrape_interval: 5s
+    scrape_timeout: 2s
+    metrics_path: /
+    file_sd_configs:
+      - files:
+          - /etc/prometheus/targets/knot.yml

prometheus/files/prometheus/targets/knot.yml

+---
+{% set targets = {'targets': salt['prometheus.prometheus_targets_for_grain']('prometheus_knot_export') | default([])} %}
+- {{ targets | yaml(false) | indent(2) }}