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

---
 .../prometheus/exporter/bind/defaults/main.yml     |  9 +++++
 .../prometheus/exporter/bind/handlers/main.yml     | 10 +++++
 .../prometheus/exporter/bind/tasks/main.yml        | 44 ++++++++++++++++++++++
 .../prometheus/exporter/bind/templates/service.j2  | 30 +++++++++++++++
 4 files changed, 93 insertions(+)
 create mode 100644 roles/monitoring/prometheus/exporter/bind/defaults/main.yml
 create mode 100644 roles/monitoring/prometheus/exporter/bind/handlers/main.yml
 create mode 100644 roles/monitoring/prometheus/exporter/bind/tasks/main.yml
 create mode 100644 roles/monitoring/prometheus/exporter/bind/templates/service.j2

(limited to 'roles/monitoring/prometheus/exporter/bind')

diff --git a/roles/monitoring/prometheus/exporter/bind/defaults/main.yml b/roles/monitoring/prometheus/exporter/bind/defaults/main.yml
new file mode 100644
index 00000000..66a6fcc9
--- /dev/null
+++ b/roles/monitoring/prometheus/exporter/bind/defaults/main.yml
@@ -0,0 +1,9 @@
+---
+# prometheus_exporter_bind_version:
+
+prometheus_exporter_bind_stats_version: auto
+
+prometheus_exporter_bind_stats_groups:
+  - server
+  - view
+  - tasks
diff --git a/roles/monitoring/prometheus/exporter/bind/handlers/main.yml b/roles/monitoring/prometheus/exporter/bind/handlers/main.yml
new file mode 100644
index 00000000..5fa1f04d
--- /dev/null
+++ b/roles/monitoring/prometheus/exporter/bind/handlers/main.yml
@@ -0,0 +1,10 @@
+---
+- name: restart prometheus-bind-exporter
+  service:
+    name: prometheus-bind-exporter
+    state: restarted
+
+- name: reload nginx
+  service:
+    name: nginx
+    state: reloaded
diff --git a/roles/monitoring/prometheus/exporter/bind/tasks/main.yml b/roles/monitoring/prometheus/exporter/bind/tasks/main.yml
new file mode 100644
index 00000000..1ac4b8d7
--- /dev/null
+++ b/roles/monitoring/prometheus/exporter/bind/tasks/main.yml
@@ -0,0 +1,44 @@
+---
+- name: generate apt pin file for exporter-bind package
+  when: prometheus_exporter_bind_version is defined
+  copy:
+    dest: "/etc/apt/preferences.d/prom-exporter-bind.pref"
+    content: |
+      Package: prom-exporter-bind
+      Pin: version {{ prometheus_exporter_bind_version }}-1
+      Pin-Priority: 1001
+
+- name: remove apt pin file for exporter-bind package
+  when: prometheus_exporter_bind_version is not defined
+  file:
+    path: "/etc/apt/preferences.d/prom-exporter-bind.pref"
+    state: absent
+
+- name: install apt packages
+  apt:
+    name: "prom-exporter-bind{% if prometheus_exporter_bind_version is defined %}={{ prometheus_exporter_bind_version }}-1{% endif %}"
+    state: present
+    allow_downgrade: yes
+  notify: restart prometheus-bind-exporter
+
+- name: generate systemd service unit
+  template:
+    src: service.j2
+    dest: /etc/systemd/system/prometheus-bind-exporter.service
+  notify: restart prometheus-bind-exporter
+
+- name: make sure prometheus-bind-exporter is enabled and started
+  systemd:
+    name: prometheus-bind-exporter.service
+    daemon_reload: yes
+    state: started
+    enabled: yes
+
+- name: register exporter
+  copy:
+    content: |
+      location = /bind {
+          proxy_pass http://127.0.0.1:9119/metrics;
+      }
+    dest: /etc/prometheus/exporter/bind.locations
+  notify: reload nginx
diff --git a/roles/monitoring/prometheus/exporter/bind/templates/service.j2 b/roles/monitoring/prometheus/exporter/bind/templates/service.j2
new file mode 100644
index 00000000..853fee18
--- /dev/null
+++ b/roles/monitoring/prometheus/exporter/bind/templates/service.j2
@@ -0,0 +1,30 @@
+[Unit]
+Description=Prometheus bind exporter
+
+[Service]
+Restart=always
+User=prometheus-exporter
+ExecStart=/usr/bin/prometheus-bind-exporter --web.listen-address="127.0.0.1:9119" --bind.stats-version="{{ prometheus_exporter_bind_stats_version }}" --bind.stats-groups="{{ prometheus_exporter_bind_stats_groups | join(',') }}"
+
+# systemd hardening-options
+AmbientCapabilities=
+CapabilityBoundingSet=
+DeviceAllow=/dev/null rw
+DevicePolicy=strict
+LockPersonality=true
+MemoryDenyWriteExecute=true
+NoNewPrivileges=true
+PrivateDevices=true
+PrivateTmp=true
+ProtectControlGroups=true
+ProtectHome=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectSystem=strict
+RemoveIPC=true
+RestrictNamespaces=true
+RestrictRealtime=true
+SystemCallArchitectures=native
+
+[Install]
+WantedBy=multi-user.target
-- 
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