kresd + prometheus: monitor kresd

playbooks/kresd.yml

@@ -17,6 +17,13 @@
       - address: "::"
         port: 853
         kind: tls
+      - address: 0.0.0.0
+        port: 8453
+        kind: webmgmt
+      - address: "::"
+        port: 8453
+        kind: webmgmt
+        tls: false
     kresd__cache_size: 512
   roles:
     - kresd

playbooks/prometheus.yml

@@ -50,6 +50,12 @@
           - prometheus-2.monit.infra.auro.re
         address:
           port: 9090
+      kresd:
+        targets:
+          - dns-1.int.infra.auro.re
+          - dns-2.int.infra.auro.re
+        address:
+          port: 8453
       bird:
         targets:
           - edge-1.back.infra.auro.re

roles/kresd/defaults/main.yml

@@ -2,3 +2,5 @@
 kresd__listen: []
 kresd__freebind: true
 kresd__cache_size: 128
+kresd__prometheus_namespace: "kresd_"
+...

roles/kresd/tasks/main.yml

@@ -1,7 +1,9 @@
 ---
 - name: Install knot-resolver
   apt:
-    name: knot-resolver
+    name:
+      - knot-resolver
+      - knot-resolver-module-http
 
 - name: Configure kresd
   template:

roles/kresd/templates/kresd.conf.j2

@@ -16,6 +16,18 @@ modules = {
     'hints > iterate',
     'stats',
     'predict',
+    'http',
 }
 
+{% set webmgmt = kresd__listen
+                 | selectattr("kind", "==", "webmgmt")
+		 | default({}) %}
+http.config({
+    tls = {{ (webmgmt | first).tls
+             | default(False)
+	     | ternary('true', 'false') }},
+}, 'webmgmt')
+
+http.prometheus.namespace = '{{ kresd__prometheus_namespace }}'
+
 cache.size = {{ kresd__cache_size | int }} * MB