feat: add prometheus manifest

roles/docker/tasks/main.yml

@@ -0,0 +1,42 @@
+---
+- name: Install initial dependencies
+  apt:
+    name:
+      - apt-transport-https
+      - ca-certificates
+      - curl
+      - gnupg
+      - lsb-release
+    state: present
+    update_cache: yes
+
+- name: Add Docker official GPG key
+  apt_key:
+    url: https://download.docker.com/linux/debian/gpg
+    state: present
+
+- name: Set up Docker repository for ARM architecture
+  apt_repository:
+    repo: "deb [arch={{ 'arm64' if ansible_architecture == 'aarch64' else 'armhf' }}] https://download.docker.com/linux/debian {{ ansible_distribution_release }} stable"
+    state: present
+
+- name: Install Docker Engine and CLI components
+  apt:
+    name:
+      - docker-ce
+      - docker-ce-cli
+      - containerd.io
+    state: present
+    update_cache: yes
+
+- name: Ensure Docker service is started and enabled
+  systemd:
+    name: docker
+    state: started
+    enabled: yes
+
+- name: Add current user to docker group
+  user:
+    name: "{{ ansible_user }}"
+    groups: docker
+    append: yes

roles/k3s/tasks/main.yml

@@ -0,0 +1,13 @@
+- name: Download and execute K3s installation script with monitoring metrics enabled
+  shell: |
+    curl -sfL https://get.k3s.io | sh -
+  environment:
+    INSTALL_K3S_EXEC: "--server --write-kubeconfig-mode 644 --kube-controller-manager-arg bind-address=0.0.0.0 --kube-proxy-arg metrics-bind-address=0.0.0.0 --kube-scheduler-arg bind-address=0.0.0.0"
+  args:
+    creates: /usr/local/bin/k3s
+
+- name: Ensure K3s service is started and enabled
+  systemd:
+    name: k3s
+    state: started
+    enabled: yes

roles/prometheus/tasks/main.yml

@@ -0,0 +1,24 @@
+- name: Create monitoring namespace
+  kubernetes.core.k8s:
+    name: monitoring
+    kind: Namespace
+    state: present
+
+- name: Add Prometheus community Helm repository
+  kubernetes.core.helm_repository:
+    name: prometheus-community
+    repo_url: "https://prometheus-community.github.io/helm-charts"
+
+- name: Copy Prometheus customization values
+  template:
+    src: values.yml.j2
+    dest: /tmp/prometheus-values.yml
+
+- name: Deploy kube-prometheus-stack via Helm
+  kubernetes.core.helm:
+    name: kube-prometheus-stack
+    chart_ref: prometheus-community/kube-prometheus-stack
+    release_namespace: monitoring
+    values_files:
+      - /tmp/prometheus-values.yml
+    state: present