prometheus: add exporter for bind

7 files changed, 107 insertions, 0 deletions

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
diff --git a/roles/monitoring/prometheus/exporter/meta/main.yml b/roles/monitoring/prometheus/exporter/meta/main.yml
index 704b0f00..3999b608 100644
--- a/roles/monitoring/prometheus/exporter/meta/main.yml
+++ b/roles/monitoring/prometheus/exporter/meta/main.yml
@@ -15,3 +15,5 @@ dependencies:
     when: "'ssl' in (prometheus_exporters_default | union(prometheus_exporters_extra))"
   - role: monitoring/prometheus/exporter/smokeping
     when: "'smokeping' in (prometheus_exporters_default | union(prometheus_exporters_extra))"
+  - role: monitoring/prometheus/exporter/bind
+    when: "'bind' in (prometheus_exporters_default | union(prometheus_exporters_extra))"
diff --git a/roles/monitoring/prometheus/server/defaults/main/main.yml b/roles/monitoring/prometheus/server/defaults/main/main.yml
index 611b1fef..8aa06d42 100644
--- a/roles/monitoring/prometheus/server/defaults/main/main.yml
+++ b/roles/monitoring/prometheus/server/defaults/main/main.yml
@@ -28,6 +28,7 @@ prometheus_server_rules:
   ssl: "{{ prometheus_server_rules_ssl + prometheus_server_rules_ssl_extra }}"
   ssl/probe: "{{ prometheus_server_rules_ssl__probe + prometheus_server_rules_ssl__probe_extra }}"
   smokeping: "{{ prometheus_server_rules_smokeping + prometheus_server_rules_smokeping_extra }}"
+  bind: "{{ prometheus_server_rules_bind + prometheus_server_rules_bind_extra }}"
 
 # prometheus_server_alertmanager:
 #   url: "127.0.0.1:9093"
diff --git a/roles/monitoring/prometheus/server/defaults/main/rules_bind.yml b/roles/monitoring/prometheus/server/defaults/main/rules_bind.yml
new file mode 100644
index 00000000..4c401b9d
--- /dev/null
+++ b/roles/monitoring/prometheus/server/defaults/main/rules_bind.yml
@@ -0,0 +1,11 @@
+---
+prometheus_server_rules_bind_extra: []
+prometheus_server_rules_bind:
+  - alert: BindStatsUnreachable
+    expr: bind_up == 0
+    for: 0m
+    labels:
+      severity: critical
+    annotations:
+      summary: Unable to scrape bind stats channel (instance {{ '{{' }} $labels.instance {{ '}}' }})
+      description: "The bind process might have crashed.\n  VALUE = {{ '{{' }} $value {{ '}}' }}\n  LABELS = {{ '{{' }} $labels {{ '}}' }}"