Exclude hosts from scrape rules if prometheus_exporters_ignore is set

host_vars/bbnrb1/prometheus-exporters.yml

+---
+prometheus_exporters_ignore: true

host_vars/mailgw01.vm.freifunk-stuttgart.de/prometheus-exporters.yml

+---
+prometheus_exporters_ignore: true

host_vars/mailgw02.vm.freifunk-stuttgart.de/prometheus-exporters.yml

+---
+prometheus_exporters_ignore: true

host_vars/nrb-backbonetest2.vm.freifunk-stuttgart.de/prometheus-exporters.yml

+---
+prometheus_exporters_ignore: true

host_vars/openslides.vm.freifunk-stuttgart.de/prometheus-exporters.yml

+---
+prometheus_exporters_ignore: true

inventory/role_core.yml

+---
+role_core:
+  hosts:
+    core01-z10a.vm.freifunk-stuttgart.de:
+    core02-z10a.vm.freifunk-stuttgart.de:

roles/prometheus/tasks/main.yml

@@ -8,12 +8,26 @@
     msg: "This role must only be run on prometheus hosts"
   when: not is_prometheus | default(false)
 
-    #- name: Create node_exporter_targets.yml file
-    #  template:
-    #    src: node_exporter_targets.yml.j2
-    #    dest: /etc/prometheus/node_exporter_targets.yml
-    #  notify:
-    #    - Restart prometheus
+- name: Create node_exporter_targets.yml file
+  template:
+    src: node_exporter_targets.yml.j2
+    dest: /etc/prometheus/node_exporter_targets.yml
+  notify:
+    - Restart prometheus
+
+- name: Create kea_exporter_targets.yml file
+  template:
+    src: kea_exporter_targets.yml.j2
+    dest: /etc/prometheus/kea_exporter_targets.yml
+  notify:
+    - Restart prometheus
+
+- name: Create bird_exporter_targets.yml file
+  template:
+    src: bird_exporter_targets.yml.j2
+    dest: /etc/prometheus/bird_exporter_targets.yml
+  notify:
+    - Restart prometheus
 
 - name: Check if client-cert exists
   stat:
@@ -134,3 +148,12 @@
   file:
     path: /tmp/{{ inventory_hostname }}.cert.pem
     state: absent
+
+- name: Installing prometheus exporter packages
+  apt:
+    name:
+      - prometheus
+      - prometheus-alertmanager
+      - prometheus-blackbox-exporter
+    state: present
+    install_recommends: false

roles/prometheus/templates/bird_exporter_targets.yml.j2

+{% for container in groups['role_core'] %}
+- targets:
+    - '{{ hostvars[container].ansible_host | default(container) }}:9998'
+  labels:
+    instance: {{ (hostvars[container].ansible_host | default(container)).split('.')[0] }}
+{% endfor %}

roles/prometheus/templates/kea_exporter_targets.yml.j2

+{% for container in groups['role_dhcpserver'] %}
+- targets:
+    - '{{ hostvars[container].ansible_host | default(container) }}:9998'
+  labels:
+    instance: {{ (hostvars[container].ansible_host | default(container)).split('.')[0] }}
+{% endfor %}

roles/prometheus/templates/node_exporter_targets.yml.j2

+{% for host in groups['all'] %}
+{% if not hostvars[host].prometheus_exporters_ignore | default(false) %}
 - targets:
-    {% for container in groups['ffspveguests'] %}
-    - '{{ hostvars[container].ansible_host | default(container) }}.vm.freifunk-stuttgart.de:9998'
+    - '{{ hostvars[host].ansible_host | default(host) }}:9998'
+  labels:
+    instance: {{ (hostvars[host].ansible_host | default(host)).split('.')[0] }}
+{% endif %}
 {% endfor %}