diff --git a/ansible/group_vars/all/vault b/ansible/group_vars/all/vault
index 2c926bc..a9cc07e 100644
--- a/ansible/group_vars/all/vault
+++ b/ansible/group_vars/all/vault
@@ -1,274 +1,276 @@
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diff --git a/ansible/inventory.yml b/ansible/inventory.yml
index cfe0501..97d31ee 100755
--- a/ansible/inventory.yml
+++ b/ansible/inventory.yml
@@ -52,13 +52,12 @@ n8n_server:
   hosts:
     tiki-room:
 
-prometheus_server:
-  hosts:
-    cinderella-castle:
-
-prometheus_nodes:
+monitoring_server:
   hosts:
     cinderella-castle:
+      ansible_host: 10.1.71.31
+      ansible_user: wed
+      ansible_become: true
 
 # node_explorer:
 #   hosts:
diff --git a/ansible/playbooks/day1_deploy_monitoring.yml b/ansible/playbooks/day1_deploy_monitoring.yml
new file mode 100644
index 0000000..a5b7759
--- /dev/null
+++ b/ansible/playbooks/day1_deploy_monitoring.yml
@@ -0,0 +1,26 @@
+---
+# ------------------------------------------------------------------------------
+# FILE: playbooks/day1_deploy_monitoring.yml
+# DESCRIPTION: Deploys Prometheus + Grafana + Node Exporter + Alertmanager
+#              on cinderella-castle (10.1.71.31)
+#              Runs: common → docker-host → monitoring
+#
+# USAGE:
+#   ansible-playbook -i inventory.yml playbooks/day1_deploy_monitoring.yml
+#   ansible-playbook -i inventory.yml playbooks/day1_deploy_monitoring.yml --limit cinderella_castle
+#
+# SECRETS REQUIRED IN VAULT (group_vars/all/vault):
+#   vault_grafana_admin_password
+# ------------------------------------------------------------------------------
+
+- name: Deploy monitoring stack on cinderella-castle
+  hosts: cinderella-castle
+  become: true
+
+  vars:
+    grafana_admin_password: "{{ vault_grafana_admin_password }}"
+
+  roles:
+    - role: common
+    - role: docker-host
+    - role: monitoring
diff --git a/ansible/playbooks/roles/monitoring/defaults/main.yml b/ansible/playbooks/roles/monitoring/defaults/main.yml
new file mode 100644
index 0000000..c94e182
--- /dev/null
+++ b/ansible/playbooks/roles/monitoring/defaults/main.yml
@@ -0,0 +1,38 @@
+---
+# ------------------------------------------------------------------------------
+# FILE: roles/monitoring/defaults/main.yml
+# ------------------------------------------------------------------------------
+
+# Directory layout on cinderella-castle
+monitoring_base_dir: /opt/docker/monitoring
+
+# Data disk — LVM on /dev/sdb, mounted at this path for Prometheus TSDB
+prometheus_data_dir: /var/lib/prometheus
+prometheus_vg: prometheus-vg
+prometheus_lv: prometheus-lv
+
+# Prometheus retention
+prometheus_retention_time: 15d
+prometheus_retention_size: 58GB     # 64GB disk, leaving headroom
+
+# Scrape interval
+prometheus_scrape_interval: 30s
+
+# Grafana
+grafana_port: 3000
+grafana_admin_user: admin
+
+# Service DNS (via Traefik)
+grafana_hostname: grafana.local.mk-labs.cloud
+
+# Trusted proxy (lightning-lane)
+trusted_proxy_ip: 10.1.71.35
+
+# Prometheus port (internal, not exposed via Traefik)
+prometheus_port: 9090
+
+# Alertmanager port (internal)
+alertmanager_port: 9093
+
+# Node exporter port
+node_exporter_port: 9100
diff --git a/ansible/playbooks/roles/monitoring/handlers/main.yml b/ansible/playbooks/roles/monitoring/handlers/main.yml
new file mode 100644
index 0000000..1b797e5
--- /dev/null
+++ b/ansible/playbooks/roles/monitoring/handlers/main.yml
@@ -0,0 +1,10 @@
+---
+# ------------------------------------------------------------------------------
+# FILE: roles/monitoring/handlers/main.yml
+# ------------------------------------------------------------------------------
+
+- name: restart monitoring
+  community.docker.docker_compose_v2:
+    project_src: "{{ monitoring_base_dir }}"
+    state: present
+    recreate: always
diff --git a/ansible/playbooks/roles/monitoring/tasks/main.yml b/ansible/playbooks/roles/monitoring/tasks/main.yml
new file mode 100644
index 0000000..3bdb91d
--- /dev/null
+++ b/ansible/playbooks/roles/monitoring/tasks/main.yml
@@ -0,0 +1,152 @@
+---
+# ------------------------------------------------------------------------------
+# FILE: roles/monitoring/tasks/main.yml
+# ------------------------------------------------------------------------------
+
+# ── Data disk (LVM) ───────────────────────────────────────────────────────────
+
+- name: Install LVM2
+  ansible.builtin.apt:
+    name: lvm2
+    state: present
+    update_cache: true
+
+- name: Check if PV already exists on /dev/sdb
+  ansible.builtin.command: pvs /dev/sdb
+  register: pvs_result
+  changed_when: false
+  failed_when: false
+
+- name: Check if disk has a partition table signature
+  ansible.builtin.command: wipefs /dev/sdb
+  register: wipefs_check
+  changed_when: false
+  failed_when: false
+  when: pvs_result.rc != 0
+
+- name: Wipe GPT protective partition signature from /dev/sdb
+  ansible.builtin.command: wipefs -a /dev/sdb
+  when:
+    - pvs_result.rc != 0
+    - wipefs_check.stdout | length > 0
+
+- name: Create LVM volume group on /dev/sdb
+  community.general.lvg:
+    vg: prometheus-vg
+    pvs: /dev/sdb
+    state: present
+  when: pvs_result.rc != 0
+
+- name: Check if logical volume already exists
+  ansible.builtin.command: lvs /dev/prometheus-vg/prometheus-lv
+  register: lvs_result
+  changed_when: false
+  failed_when: false
+
+- name: Create logical volume for Prometheus TSDB
+  community.general.lvol:
+    vg: prometheus-vg
+    lv: prometheus-lv
+    size: 100%FREE
+    state: present
+    shrink: false
+  when: lvs_result.rc != 0
+
+- name: Format logical volume as ext4
+  community.general.filesystem:
+    fstype: ext4
+    dev: /dev/prometheus-vg/prometheus-lv
+
+- name: Create Prometheus data directory mount point
+  ansible.builtin.file:
+    path: "{{ prometheus_data_dir }}"
+    state: directory
+    owner: root
+    group: root
+    mode: "0755"
+
+- name: Mount Prometheus logical volume
+  ansible.posix.mount:
+    path: "{{ prometheus_data_dir }}"
+    src: /dev/prometheus-vg/prometheus-lv
+    fstype: ext4
+    opts: defaults
+    state: mounted
+
+- name: Set ownership of Prometheus data directory
+  ansible.builtin.file:
+    path: "{{ prometheus_data_dir }}"
+    state: directory
+    owner: "65534"   # nobody — Prometheus container runs as this UID
+    group: "65534"
+    mode: "0755"
+
+# ── Directory layout ───────────────────────────────────────────────────────────
+
+- name: Create monitoring directory structure
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    owner: "{{ ansible_user }}"
+    group: docker
+    mode: "0775"
+  loop:
+    - "{{ monitoring_base_dir }}"
+    - "{{ monitoring_base_dir }}/prometheus"
+    - "{{ monitoring_base_dir }}/grafana"
+    - "{{ monitoring_base_dir }}/alertmanager"
+
+# ── Config files ───────────────────────────────────────────────────────────────
+
+- name: Deploy Prometheus configuration
+  ansible.builtin.template:
+    src: prometheus.yaml.j2
+    dest: "{{ monitoring_base_dir }}/prometheus/prometheus.yaml"
+    owner: "{{ ansible_user }}"
+    group: docker
+    mode: "0644"
+  notify: restart monitoring
+
+- name: Deploy Alertmanager configuration
+  ansible.builtin.template:
+    src: alertmanager.yml.j2
+    dest: "{{ monitoring_base_dir }}/alertmanager/alertmanager.yml"
+    owner: "{{ ansible_user }}"
+    group: docker
+    mode: "0644"
+  notify: restart monitoring
+
+- name: Deploy Grafana provisioning datasource
+  ansible.builtin.template:
+    src: grafana-datasource.yml.j2
+    dest: "{{ monitoring_base_dir }}/grafana/datasource.yml"
+    owner: "{{ ansible_user }}"
+    group: docker
+    mode: "0644"
+  notify: restart monitoring
+
+# ── Compose stack ──────────────────────────────────────────────────────────────
+
+- name: Deploy monitoring compose file from boilerplate
+  ansible.builtin.copy:
+    src: "{{ playbook_dir }}/../../boilerplates/monitoring/compose.yaml"
+    dest: "{{ monitoring_base_dir }}/compose.yaml"
+    owner: "{{ ansible_user }}"
+    group: docker
+    mode: "0644"
+  notify: restart monitoring
+
+- name: Deploy .env with secrets from vault
+  ansible.builtin.template:
+    src: env.j2
+    dest: "{{ monitoring_base_dir }}/.env"
+    owner: "{{ ansible_user }}"
+    group: docker
+    mode: "0600"
+  notify: restart monitoring
+
+- name: Start monitoring stack
+  community.docker.docker_compose_v2:
+    project_src: "{{ monitoring_base_dir }}"
+    state: present
+
diff --git a/ansible/playbooks/roles/monitoring/templates/alertmanager.yml.j2 b/ansible/playbooks/roles/monitoring/templates/alertmanager.yml.j2
new file mode 100644
index 0000000..447b2a3
--- /dev/null
+++ b/ansible/playbooks/roles/monitoring/templates/alertmanager.yml.j2
@@ -0,0 +1,13 @@
+# ------------------------------------------------------------------------------
+# FILE: roles/monitoring/templates/alertmanager.yml.j2
+# DESCRIPTION: Alertmanager configuration — routing deferred (P.XX)
+# ------------------------------------------------------------------------------
+
+route:
+  receiver: blackhole
+  group_wait: 30s
+  group_interval: 5m
+  repeat_interval: 4h
+
+receivers:
+  - name: blackhole
diff --git a/ansible/playbooks/roles/monitoring/templates/env.j2 b/ansible/playbooks/roles/monitoring/templates/env.j2
new file mode 100644
index 0000000..1dd95cd
--- /dev/null
+++ b/ansible/playbooks/roles/monitoring/templates/env.j2
@@ -0,0 +1,11 @@
+# ------------------------------------------------------------------------------
+# FILE: roles/monitoring/templates/env.j2
+# DESCRIPTION: Environment file for monitoring compose stack
+# Deployed to {{ monitoring_base_dir }}/.env
+# ------------------------------------------------------------------------------
+
+GRAFANA_ADMIN_USER={{ grafana_admin_user }}
+GRAFANA_ADMIN_PASSWORD={{ grafana_admin_password }}
+PROMETHEUS_RETENTION_TIME={{ prometheus_retention_time }}
+PROMETHEUS_RETENTION_SIZE={{ prometheus_retention_size }}
+TRUSTED_PROXIES={{ trusted_proxy_ip }}
diff --git a/ansible/playbooks/roles/monitoring/templates/grafana-datasource.yml.j2 b/ansible/playbooks/roles/monitoring/templates/grafana-datasource.yml.j2
new file mode 100644
index 0000000..87076c1
--- /dev/null
+++ b/ansible/playbooks/roles/monitoring/templates/grafana-datasource.yml.j2
@@ -0,0 +1,14 @@
+# ------------------------------------------------------------------------------
+# FILE: roles/monitoring/templates/grafana-datasource.yml.j2
+# DESCRIPTION: Auto-provisions Prometheus as Grafana default datasource
+# ------------------------------------------------------------------------------
+
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prometheus:9090
+    isDefault: true
+    editable: false
diff --git a/ansible/playbooks/roles/monitoring/templates/prometheus.yaml.j2 b/ansible/playbooks/roles/monitoring/templates/prometheus.yaml.j2
new file mode 100644
index 0000000..395a8ae
--- /dev/null
+++ b/ansible/playbooks/roles/monitoring/templates/prometheus.yaml.j2
@@ -0,0 +1,50 @@
+# ------------------------------------------------------------------------------
+# FILE: roles/monitoring/templates/prometheus.yml.j2
+# DESCRIPTION: Prometheus scrape configuration
+# ------------------------------------------------------------------------------
+
+global:
+  scrape_interval: {{ prometheus_scrape_interval }}
+  evaluation_interval: {{ prometheus_scrape_interval }}
+
+alerting:
+  alertmanagers:
+    - static_configs:
+        - targets:
+            - alertmanager:9093
+
+rule_files: []
+
+scrape_configs:
+
+  # Prometheus self-monitoring
+  - job_name: prometheus
+    static_configs:
+      - targets:
+          - localhost:9090
+
+  # cinderella-castle node exporter (this host)
+  - job_name: node-cinderella-castle
+    static_configs:
+      - targets:
+          - cinderella-castle:9100
+        labels:
+          hostname: cinderella-castle
+
+  # Proxmox nodes
+  - job_name: proxmox-nodes
+    static_configs:
+      - targets:
+          - 10.1.71.11:9100
+          - 10.1.71.12:9100
+          - 10.1.71.13:9100
+        labels:
+          job: proxmox
+
+  # Traefik metrics
+  - job_name: traefik
+    static_configs:
+      - targets:
+          - 10.1.71.35:8080
+        labels:
+          hostname: lightning-lane
diff --git a/boilerplates/grafana/compose.yaml b/boilerplates/grafana/compose.yaml
new file mode 100644
index 0000000..4a66b31
--- /dev/null
+++ b/boilerplates/grafana/compose.yaml
@@ -0,0 +1,12 @@
+services:
+  grafana:
+    image: docker.io/grafana/grafana-oss:12.3.3
+    restart: unless-stopped
+    ports:
+      - "3000:3000"
+    volumes:
+      - grafana_data:/var/lib/grafana
+
+volumes:
+  grafana_data:
+    driver: local
diff --git a/boilerplates/monitoring/compose.yaml b/boilerplates/monitoring/compose.yaml
new file mode 100644
index 0000000..7a8625a
--- /dev/null
+++ b/boilerplates/monitoring/compose.yaml
@@ -0,0 +1,105 @@
+---
+# ------------------------------------------------------------------------------
+# FILE: boilerplates/monitoring/compose.yaml
+# DESCRIPTION: Combined Prometheus + Grafana + Alertmanager + Node Exporter
+#              stack for cinderella-castle (10.1.71.31)
+#
+# Generated from:
+#   boilerplates/prometheus/compose.yaml (prom/prometheus:v3.9.1)
+#   boilerplates/grafana/compose.yaml    (grafana/grafana-oss:12.3.3)
+#
+# Prometheus TSDB on dedicated second disk mounted at /var/lib/prometheus.
+# Grafana data on named Docker volume.
+# ------------------------------------------------------------------------------
+
+services:
+
+  prometheus:
+    image: docker.io/prom/prometheus:v3.9.1
+    container_name: prometheus
+    restart: unless-stopped
+    user: "65534:65534"
+    command:
+      - --config.file=/etc/prometheus/prometheus.yaml
+      - --storage.tsdb.path=/prometheus
+      - --storage.tsdb.retention.time=${PROMETHEUS_RETENTION_TIME:-15d}
+      - --storage.tsdb.retention.size=${PROMETHEUS_RETENTION_SIZE:-58GB}
+      - --web.enable-lifecycle
+    ports:
+      - "127.0.0.1:9090:9090"
+    volumes:
+      - /opt/docker/monitoring/prometheus/prometheus.yaml:/etc/prometheus/prometheus.yaml:ro
+      - /var/lib/prometheus:/prometheus
+    networks:
+      - monitoring
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:9090/-/healthy"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 10s
+
+  grafana:
+    image: docker.io/grafana/grafana-oss:12.3.3
+    container_name: grafana
+    restart: unless-stopped
+    environment:
+      - GF_SECURITY_ADMIN_USER=${GRAFANA_ADMIN_USER:-admin}
+      - GF_SECURITY_ADMIN_PASSWORD=${GRAFANA_ADMIN_PASSWORD}
+      - GF_SERVER_ROOT_URL=https://grafana.local.mk-labs.cloud
+    ports:
+      - "3000:3000"
+    volumes:
+      - grafana_data:/var/lib/grafana
+      - /opt/docker/monitoring/grafana/datasource.yml:/etc/grafana/provisioning/datasources/datasource.yml:ro
+    networks:
+      - monitoring
+    depends_on:
+      prometheus:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:3000/api/health"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 15s
+
+  alertmanager:
+    image: docker.io/prom/alertmanager:latest
+    container_name: alertmanager
+    restart: unless-stopped
+    command:
+      - --config.file=/etc/alertmanager/alertmanager.yml
+      - --storage.path=/alertmanager
+    ports:
+      - "127.0.0.1:9093:9093"
+    volumes:
+      - /opt/docker/monitoring/alertmanager/alertmanager.yml:/etc/alertmanager/alertmanager.yml:ro
+      - alertmanager_data:/alertmanager
+    networks:
+      - monitoring
+
+  node-exporter:
+    image: docker.io/prom/node-exporter:latest
+    container_name: node-exporter
+    restart: unless-stopped
+    pid: host
+    command:
+      - --path.rootfs=/host
+    ports:
+      - "9100:9100"
+    volumes:
+      - /:/host:ro,rslave
+    networks:
+      - monitoring
+
+networks:
+  monitoring:
+    driver: bridge
+    name: monitoring
+
+volumes:
+  grafana_data:
+    driver: local
+  alertmanager_data:
+    driver: local
diff --git a/boilerplates/prometheus/compose.yaml b/boilerplates/prometheus/compose.yaml
new file mode 100644
index 0000000..1de7955
--- /dev/null
+++ b/boilerplates/prometheus/compose.yaml
@@ -0,0 +1,17 @@
+---
+services:
+  prometheus:
+    image: docker.io/prom/prometheus:v3.9.1
+    restart: unless-stopped
+    command:
+      - --config.file=/etc/prometheus/prometheus.yaml
+      - --storage.tsdb.retention.time=15d
+    ports:
+      - "9090:9090"
+    volumes:
+      - prometheus_data:/prometheus
+      - ./config/prometheus.yaml:/etc/prometheus/prometheus.yaml:ro
+
+volumes:
+  prometheus_data:
+    driver: local
diff --git a/boilerplates/prometheus/config/prometheus.yaml b/boilerplates/prometheus/config/prometheus.yaml
new file mode 100644
index 0000000..69e5117
--- /dev/null
+++ b/boilerplates/prometheus/config/prometheus.yaml
@@ -0,0 +1,28 @@
+---
+global:
+  scrape_interval: 15s  # By default, scrape targets every 15 seconds.
+
+  # Attach these labels to any time series or alerts when communicating with
+  # external systems (federation, remote storage, Alertmanager).
+  # external_labels:
+  #  monitor: 'codelab-monitor'
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: 'prometheus'
+    # Override the global default and scrape targets from this job every 5 seconds.
+    scrape_interval: 5s
+    static_configs:
+      - targets: ['localhost:9090']
+
+# Example job for node_exporter
+# - job_name: 'node_exporter'
+#   static_configs:
+#     - targets: ['node_exporter:9100']
+
+# Example job for cadvisor
+# - job_name: 'cadvisor'
+#   static_configs:
+#     - targets: ['cadvisor:8080']
diff --git a/boilerplates/traefik/dynamic/grafana.yml b/boilerplates/traefik/dynamic/grafana.yml
new file mode 100644
index 0000000..40f69ba
--- /dev/null
+++ b/boilerplates/traefik/dynamic/grafana.yml
@@ -0,0 +1,21 @@
+# ------------------------------------------------------------------------------
+# FILE: boilerplates/traefik/dynamic/grafana.yml
+# DESCRIPTION: Traefik dynamic config routing grafana.local.mk-labs.cloud
+#              to Grafana on cinderella-castle (10.1.71.31:3000)
+# ------------------------------------------------------------------------------
+
+http:
+  routers:
+    grafana:
+      rule: "Host(`grafana.local.mk-labs.cloud`)"
+      entryPoints:
+        - websecure
+      tls:
+        certResolver: cloudflare
+      service: grafana
+
+  services:
+    grafana:
+      loadBalancer:
+        servers:
+          - url: "http://10.1.71.31:3000"