Prometheus Tutorial | Monitoring with Prometheus And Grafana | Prometheus Grafana Tutorial | Edureka

Introduction

This tutorial provides a comprehensive overview of using Prometheus for monitoring, along with Grafana for visualization. You will learn how to install Prometheus, Node Exporter, and Alertmanager, and how to integrate Node Exporter's metrics into Grafana. This guide is essential for DevOps practitioners seeking to implement continuous monitoring in their environments.

Step 1: Understanding Prometheus

• Prometheus is an open-source monitoring and alerting toolkit designed for reliability and scalability.
• It collects metrics as time series data, allowing for real-time monitoring of systems.
• Key features include:
  • Multi-dimensional data model
  • Powerful query language
  • Built-in alerting

Step 2: Exploring the Prometheus Architecture

• Prometheus architecture consists of several components:
  • Prometheus Server: Collects and stores metrics.
  • Node Exporter: Gathers hardware and OS metrics.
  • Alertmanager: Manages alerts and notifications.
• Understanding the flow:
  • Metrics are scraped from configured endpoints.
  • Data is stored in a time-series database.
  • Queries can be executed using PromQL (Prometheus Query Language).

Step 3: Installing Prometheus

1. Download Prometheus:

   • Go to the official Prometheus website and download the latest release suitable for your operating system.

2. Extract the downloaded file:

   • Use the following command in your terminal:

     tar -xvf prometheus-*.tar.gz
     

3. Navigate to the Prometheus directory:

   cd prometheus-*
   

4. Start Prometheus:

   • You can start Prometheus with the default configuration by running:

     ./prometheus --config.file=prometheus.yml
     

5. Access the Web Interface:

   • Open your browser and navigate to http://localhost:9090.

Step 4: Installing Node Exporter

1. Download Node Exporter:

   • Visit the Node Exporter download page and download the latest version.

2. Extract and Start Node Exporter:

   tar -xvf node_exporter-*.tar.gz
   cd node_exporter-*
   ./node_exporter &
   

3. Configure Prometheus to Scrape Node Exporter:

   • Edit the prometheus.yml file to include Node Exporter metrics:

     scrape_configs:
       - job_name: 'node'
         static_configs:
           - targets: ['localhost:9100']
     

Step 5: Installing Alertmanager

1. Download Alertmanager:

   • Get the latest version from the Alertmanager download page.

2. Extract and Start Alertmanager:

   tar -xvf alertmanager-*.tar.gz
   cd alertmanager-*
   ./alertmanager --config.file=alertmanager.yml &
   

3. Configure Alertmanager:

   • Update the alertmanager.yml file with your alerting rules and notification settings.

Step 6: Integrating Node Exporter with Grafana

1. Install Grafana:

   • Follow the instructions on the Grafana installation page for your OS.

2. Add Prometheus as a Data Source:

   • In Grafana, navigate to Configuration > Data Sources.
   • Click on "Add data source" and select Prometheus.
   • Set the URL to http://localhost:9090 and save.

3. Create Dashboards:

   • Use the Grafana interface to create dashboards and visualize metrics collected from Node Exporter.

Conclusion

You have now set up Prometheus and Grafana for monitoring your system metrics. By following these steps, you can continuously track performance and receive alerts for any anomalies. Next, consider diving deeper into PromQL for advanced querying or exploring Grafana's dashboard features for enhanced visualization capabilities.