Introduction:

Welcome to Day 75 of #90daysofdevops! In today we'll be setting up a dashboard to visualize Nginx logs.

Pre-requisites:

1. Amazon EC2 Instance

   • Ensure the availability of an Amazon EC2 instance to serve as the host for Docker containers and the monitoring tools.

     

2. Grafana, Loki, and Promtail Installed

   • Install Grafana, Loki, and Promtail to set up the monitoring and log aggregation stack on the EC2 instance.

     • • Grafana: The visualization and monitoring tool.

         * Loki: The log aggregation system.

         * Promtail: The agent responsible for collecting and forwarding logs to Loki.

3. If the necessary tools are not installed, follow the step-by-step instructions provided in the referenced blog post for comprehensive guidance.

   • For Grafana: LINK

     %[devxblog.hashnode.dev/setting-up-grafana-on..

   • For Loki + Promtail: LINK

     %[devxblog.hashnode.dev/grafana-loki-promtail..

Certainly! Here are the step-by-step instructions:

Step 1: Install Nginx

sudo apt update
sudo apt install nginx
sudo systemctl start nginx

Step 2: Configure Promtail to Read Nginx Logs

1. Create a configuration file for Promtail, e.g., promtail-config.yml:

    server:
      http_listen_port: 9080
      grpc_listen_port: 0
    positions:
      filename: /tmp/positions.yaml
    clients:
      - url: http://localhost:3100/loki/api/v1/push
    scrape_configs:
      - job_name: nginx
        static_configs:
          - targets:
              - localhost
            labels:
              job: nginx
              __path__: /var/log/nginx/*log
   

   

2. Restart the promtial container

    docker restart <continer_id>
   

   

Step 3: Open Grafana in the Browser

1. Access Grafana in your web browser (typically at http://localhost:3000).

2. Log in with the default credentials (admin/admin).

Step 4: Add Loki as a Data Source

1. In Grafana, go to "Settings" > "Data Sources" > "Add your first data source."

2. 

   

   Choose "Loki" from the list.

3. 

   Set the URL to http://localhost:3100.

Step 5: Create a Loki Query in Grafana

1. Go to "Explore" in Grafana.

2. 

   Choose the Loki data source.

3. Use a query like {job="nginx"} to view Nginx logs.

   

Step 6: Create a Dashboard in Grafana

1. Go to the "+" menu in Grafana and choose "Dashboard."

2. 

   

   Click "Add new panel" and select "Loki" as the data source.

   

3. Create visualizations and customize your dashboard with Nginx log data.

   

Conclusion:

Congratulations on successfully setting up the Nginx monitoring dashboard using Grafana, Loki, and Promtail

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