Add prometheus deployment

deploy_monitoring.yaml

@@ -0,0 +1,4 @@
+- name: Deploy Gitea
+  hosts: monitoring
+  roles:
+    - prometheus

inventory.yaml

@@ -12,3 +12,6 @@ all_servers:
   children:
     minecraft_servers:
     devops_servers:
+  hosts:
+    monitoring:
+      ansible_host: monitoring.malcolms.xyz

prometheus/tasks/main.yaml

@@ -0,0 +1,19 @@
+- name: Install Prometheus
+  become: true
+  become_user: root
+  ansible.builtin.apt:
+    name: prometheus
+    state: latest
+- name: Install config
+  become: true
+  become_user: root
+  ansible.builtin.template:
+    src: prometheus.yml.j2
+    dest: "/etc/prometheus/prometheus.yml"
+- name: Start service
+  become: true
+  become_user: root
+  ansible.builtin.systemd_service:
+    name: prometheus
+    enabled: true
+    state: restarted

prometheus/templates/prometheus.yml.j2

@@ -0,0 +1,12 @@
+global:
+  scrape_interval:     15s
+  evaluation_interval: 15s
+
+rule_files:
+  # - "first.rules"
+  # - "second.rules"
+
+scrape_configs:
+  - job_name: prometheus
+    static_configs:
+      - targets: ['localhost:9090']