Add VM monitoring with 'node_exporter'

Author: jpraynaud

mithril-infra/assets/docker/docker-compose-monitoring.yaml

@@ -13,6 +13,7 @@ services:
       - --config.file=/etc/prometheus/prometheus.yml
     volumes:
       - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - ./prometheus/targets.json:/etc/prometheus/targets.json:ro
     labels:
       - 'traefik.enable=true'
       - 'traefik.http.routers.prometheus.rule=Host(`${PROMETHEUS_HOST}`)'
@@ -21,6 +22,20 @@ services:
       - "traefik.http.routers.prometheus.middlewares=test-auth"
       - "traefik.http.middlewares.test-auth.basicauth.users=${AUTH_USER_PASSWORD}"
 
+  node-exporter:
+    image: prom/node-exporter:latest
+    container_name: node-exporter
+    restart: unless-stopped
+    volumes:
+      - /proc:/host/proc:ro
+      - /sys:/host/sys:ro
+      - /:/rootfs:ro
+    command:
+      - '--path.procfs=/host/proc'
+      - '--path.rootfs=/rootfs'
+      - '--path.sysfs=/host/sys'
+      - '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'
+
   promtail:
     image: grafana/promtail:1.4.1
     container_name: promtail

mithril-infra/assets/docker/prometheus/prometheus.yml

@@ -11,7 +11,9 @@ scrape_configs:
     static_configs:
     - targets: ['prometheus:9090']
 
-  - job_name: 'reverse-proxy'
-    static_configs:
-    - targets: ['reverse-proxy:8680']
+  - job_name: 'targets-discovery'
+    file_sd_configs:
+    - files:
+      - 'targets.json'
+
 

mithril-infra/assets/docker/prometheus/targets.json

@@ -0,0 +1,10 @@
+[
+    {
+        "labels": {
+            "job": "node-exporter"
+        },
+        "targets": [
+            "node-exporter:9100"
+        ]
+    }
+]

mithril-infra/mithril.monitoring.tf

@@ -1,7 +1,10 @@
 
 resource "null_resource" "mithril_monitoring" {
   depends_on = [
-    null_resource.mithril_network
+    null_resource.mithril_network,
+    null_resource.mithril_reverse_proxy,
+    null_resource.mithril_aggregator,
+    null_resource.mithril_signer
   ]
 
   triggers = {