Datadog Agent Installation on AWS EC2 (Linux Server) and Sending Logs to Datadog Cloud 1.Prerequisites An active Datadog account (https://app.datadoghq.com) A running AWS EC2 instance (Amazon Linux, Ubuntu, or other Linux distribution) Root or sudo access to the EC2 instance Your Datadog API key (found under Integrations → APIs in the Datadog dashboard) 2.Connect to Your EC2 Instance Use SSH to connect: ssh -i /path/to/your-key.pem ec2-user@ 3.Install the Datadog Agent For Amazon Linux or RHEL-based systems DD_API_KEY= DD_SITE="datadoghq.com" bash -c "$(curl -L https://s3.amazonaws.com/dd-agent/scripts/install_script.sh)" For Ubuntu or Debian-based systems DD_API_KEY= DD_SITE="datadoghq.com" bash -c "$(curl -L https://s3.amazonaws.com/dd-agent/scripts/install_script.sh)" 4.Enable and Start the Agent sudo systemctl enable datadog-agent sudo systemctl start datadog-agent Check the agent status: sudo datadog-agent status 5.Enable Log Collection Edit the Datadog Agent configuration file: sudo nano /etc/datadog-agent/datadog.yaml Uncomment and set: logs_enabled: true Save and exit, then restart the agent: sudo systemctl restart datadog-agent 6.Configure Log Sources To send specific logs (e.g., application logs), create a configuration file under: /etc/datadog-agent/conf.d/.d/conf.yaml Example for an Nginx log: logs: - type: file path: /var/log/nginx/access.log service: nginx source: nginx Restart the agent again: sudo systemctl restart datadog-agent 7.Verify Logs in Datadog Go to Logs → Live Tail in the Datadog dashboard. You should see logs streaming from your EC2 instance. Use filters like service:nginx or host: to refine results. 8.Optional: Tagging and Metadata You can add tags to your EC2 instance for better organization: sudo sh -c 'echo "tags: environment:production,team:devops" >> /etc/datadog-agent/datadog.yaml' sudo systemctl restart datadog-agent 9.Troubleshooting Check agent logs: sudo tail -f /var/log/datadog/agent.log Ensure outbound traffic to Datadog endpoints is allowed (port 443). Verify your API key and region are correct. Final Result: Your AWS EC2 instance is now sending system metrics and logs to Datadog Cloud for monitoring and analysis.