add node exporter

Signed-off-by: Snehit Sah <snehitsah@protonmail.com>

node-exporter/docker-compose.yaml

@@ -0,0 +1,11 @@
+services:
+  node_exporter:
+    image: quay.io/prometheus/node-exporter:latest
+    container_name: node_exporter
+    command:
+      - '--path.rootfs=/host'
+    network_mode: host
+    pid: host
+    restart: unless-stopped
+    volumes:
+      - '/:/host:ro,rslave'

prometheus.yml

@@ -1,13 +1,11 @@
 # prometheus.yml
 global:
-  scrape_interval: 15s # How frequently to scrape targets by default.
+  scrape_interval: 3s # How frequently to scrape targets by default.
   evaluation_interval: 15s # How frequently to evaluate rules.
 
 scrape_configs:
   # Example: Scrape your custom application/service
   # Replace 'your_app_name', 'your_app_host', and 'your_app_port'
-  - job_name: 'rest_api'
+  - job_name: node
     static_configs:
-      - targets: ['localhost:3001']
-    metrics_path: '/metrics'
-
+      - targets: ['localhost:9100']