From b5406d18de64f273cbebb3875a84bc31074f0f00 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Thu, 10 Nov 2022 19:31:09 +0100
Subject: prometheus: add exporter for bind

---
 roles/network/bind/defaults/main.yml  |  9 ++++++++-
 roles/network/bind/tasks/main.yml     | 22 ++++++++++++++++++++++
 roles/network/bind/templates/stats.j2 |  7 +++++++
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 roles/network/bind/templates/stats.j2

(limited to 'roles/network/bind')

diff --git a/roles/network/bind/defaults/main.yml b/roles/network/bind/defaults/main.yml
index 80dbe396..7ed9521b 100644
--- a/roles/network/bind/defaults/main.yml
+++ b/roles/network/bind/defaults/main.yml
@@ -1,4 +1,12 @@
 ---
+## stats
+
+# bind_stats_channels:
+#   - addr: 127.0.0.1
+#     port: 8053
+#     allow:
+#     - 127.0.0.1
+
 ## options
 
 # bind_option_empty_zones_enable: yes
@@ -9,7 +17,6 @@
 # bind_option_also_notify: []
 # bind_option_allow_transfer: []
 
-
 ## zone configs
 
 bind_empty_onion_zone: no
diff --git a/roles/network/bind/tasks/main.yml b/roles/network/bind/tasks/main.yml
index 2303e76c..49898162 100644
--- a/roles/network/bind/tasks/main.yml
+++ b/roles/network/bind/tasks/main.yml
@@ -89,6 +89,28 @@
   notify: reload bind
 
 
+- name: add stats configuration
+  when: bind_stats_channels is defined
+  template:
+    src: stats.j2
+    dest: /etc/bind/named.conf.stats
+  notify: reload bind
+
+- name: remove stats configuration
+  when: bind_stats_channels is not defined
+  file:
+    path: /etc/bind/named.conf.stats
+    state: absent
+  notify: reload bind
+
+- name: enable/disable stats configuration
+  lineinfile:
+    path: /etc/bind/named.conf
+    line: 'include "/etc/bind/named.conf.stats";'
+    state: "{{ bind_stats_channels is defined | ternary('present', 'absent') }}"
+  notify: reload bind
+
+
 - name: add slave zone configuration
   when: bind_slave_zones is defined
   template:
diff --git a/roles/network/bind/templates/stats.j2 b/roles/network/bind/templates/stats.j2
new file mode 100644
index 00000000..06a1f514
--- /dev/null
+++ b/roles/network/bind/templates/stats.j2
@@ -0,0 +1,7 @@
+// Stats
+
+statistics-channels {
+{% for channel in bind_stats_channels %}
+  inet {{ channel.addr | default('*') }}{% if 'port' in channel %} port {{ channel.port }}{% endif %}{% if 'allow' in channel %} allow { {{ channel.allow | join('; ') }}; }{% endif %};
+{% endfor %}
+};
-- 
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