From 96052fe992d9cf1171b5f5565f37e7ee585847ee Mon Sep 17 00:00:00 2001
From: Kar k1 <kar@k1>
Date: Fri, 19 Sep 2025 21:39:41 +0530
Subject: [PATCH] remote host info

---
 instruction.md            | 96 +++++++++++++++++++++++++++++++++++++++
 prometheus/prometheus.yml | 32 +++++++++----
 2 files changed, 118 insertions(+), 10 deletions(-)
 create mode 100644 instruction.md

diff --git a/instruction.md b/instruction.md
new file mode 100644
index 0000000..cc1b76e
--- /dev/null
+++ b/instruction.md
@@ -0,0 +1,96 @@
+# Adding a Remote Node to Monitoring
+
+## Prerequisites
+- A remote Linux server with SSH access
+- Node Exporter installed on the remote server
+- Port 9100 open on the remote server's firewall
+
+## Step 1: Install Node Exporter on Remote VM
+
+SSH into your remote VM and run:
+
+```bash
+# Download and extract Node Exporter
+wget https://github.com/prometheus/node_exporter/releases/download/v1.6.1/node_exporter-1.6.1.linux-amd64.tar.gz
+tar xvfz node_exporter-1.6.1.linux-amd64.tar.gz
+cd node_exporter-1.6.1.linux-amd64/
+
+# Create a systemd service
+sudo tee /etc/systemd/system/node_exporter.service > /dev/null <<EOL
+[Unit]
+Description=Node Exporter
+After=network.target
+
+[Service]
+User=node_exporter
+Group=node_exporter
+Type=simple
+ExecStart=/usr/local/bin/node_exporter \
+  --collector.filesystem.ignored-mount-points='^/(sys|proc|dev|host|etc)($$|/)' \
+  --collector.diskstats.ignored-devices='^(ram|loop|fd|(h|s|v|xv)d[a-z]|nvme\\d+n\\d+p)\\d+$$'
+
+[Install]
+WantedBy=multi-user.target
+EOL
+
+# Create user and set permissions
+sudo useradd -rs /bin/false node_exporter
+sudo cp node_exporter /usr/local/bin/
+sudo systemctl daemon-reload
+sudo systemctl enable node_exporter
+sudo systemctl start node_exporter
+```
+
+## Step 2: Configure Firewall
+
+On the remote VM, allow incoming connections on port 9100:
+
+```bash
+sudo ufw allow 9100/tcp
+```
+
+## Step 3: Update Prometheus Configuration
+
+Edit `prometheus/prometheus.yml` and add the following job:
+
+```yaml
+  # Remote Node Exporters
+  - job_name: 'remote-node-exporters'
+    static_configs:
+      - targets: 
+        - 'REMOTE_VM_IP:9100'  # Replace with your remote VM's IP
+        labels:
+          instance: 'remote-vm'  # This will be the node name in Grafana
+    
+    # Optional: If you need basic auth for the remote exporter
+    # basic_auth:
+    #   username: 'your_username'
+    #   password: 'your_password'
+    
+    # Optional: If your remote exporter uses HTTPS
+    # scheme: https
+    # tls_config:
+    #   insecure_skip_verify: true
+```
+
+## Step 4: Restart Services
+
+Restart Prometheus to apply the changes:
+
+```bash
+docker-compose restart prometheus
+```
+
+## Step 5: Verify
+
+1. Check Prometheus targets at: http://localhost:9090/targets
+   - Look for "remote-node-exporters" in the list
+   - The target should show as "UP"
+
+2. In Grafana, the new node will appear in the Node Exporter dashboard's instance selector.
+
+## Security Considerations
+- For production, consider setting up authentication
+- Use a reverse proxy like Nginx with HTTPS
+- Restrict access to the Node Exporter port using firewall rules
+- Consider using a VPN or SSH tunneling for secure communication
diff --git a/prometheus/prometheus.yml b/prometheus/prometheus.yml
index 931cea7..21e1611 100644
--- a/prometheus/prometheus.yml
+++ b/prometheus/prometheus.yml
@@ -9,18 +9,30 @@ scrape_configs:
     static_configs:
       - targets: ['localhost:9090']
 
-  # Scrape Node Exporter
-  - job_name: 'node-exporter'
+  # Local Node Exporter
+  - job_name: 'node-exporters'
     static_configs:
       - targets: ['node-exporter:9100']
-    relabel_configs:
-      - source_labels: [__address__]
-        target_label: instance
-        replacement: 'node-exporter'
-    metric_relabel_configs:
-      - source_labels: [__name__]
-        regex: 'node_.*'
-        action: keep
+        labels:
+          instance: 'local-node'
+    
+  # Remote Node Exporters
+  - job_name: 'remote-node-exporters'
+    static_configs:
+      - targets: 
+        - 'REMOTE_VM_IP:9100'  # Replace with your remote VM's IP
+        labels:
+          instance: 'remote-vm'  # This will be the node name in Grafana
+    
+    # Optional: If you need basic auth for the remote exporter
+    # basic_auth:
+    #   username: 'your_username'
+    #   password: 'your_password'
+    
+    # Optional: If your remote exporter uses HTTPS
+    # scheme: https
+    # tls_config:
+    #   insecure_skip_verify: true
 
   # Scrape cAdvisor for container metrics
   - job_name: 'cadvisor'