Add prometheus and grafana for monitoring

monitoring/compose.yaml

@@ -0,0 +1,34 @@
+services:
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: prometheus
+    restart: unless-stopped
+    network_mode: host
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - prometheus-data:/prometheus
+    command:
+      - "--config.file=/etc/prometheus/prometheus.yml"
+      - "--storage.tsdb.path=/prometheus"
+
+  grafana:
+    image: grafana/grafana:latest
+    container_name: grafana
+    restart: unless-stopped
+    environment:
+      - GF_SECURITY_ADMIN_USER=admin
+      - GF_SECURITY_ADMIN_PASSWORD=${GRAFANA_ADMIN_PASSWORD}
+      - GF_INSTALL_PLUGINS=vonage-status-panel
+    volumes:
+      - grafana-data:/var/lib/grafana
+      - ./grafana/provisioning:/etc/grafana/provisioning:ro
+    ports:
+      - "4000:3000"
+    extra_hosts:
+      - "host-gateway:host-gateway"
+    depends_on:
+      - prometheus
+
+volumes:
+  prometheus-data:
+  grafana-data:

monitoring/grafana/provisioning/dashboards/dashboards.yaml

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+apiVersion: 1
+
+providers:
+  - name: default
+    type: file
+    options:
+      path: /etc/grafana/provisioning/dashboards

monitoring/grafana/provisioning/datasources/prometheus.yaml

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+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://host-gateway:9090
+    isDefault: true

monitoring/prometheus.yml.j2

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+global:
+  scrape_interval: 15s
+
+scrape_configs:
+  - job_name: node
+    static_configs:
+      - targets:
+{% for host in groups['monitored'] %}
+          - "{{ hostvars[host].ansible_host }}:9100"
+{% endfor %}