This lab focuses on setting up a CloudWatch alarm to monitor CPU utilization on an EC2 instance, configuring an SNS topic to receive email alerts when CPU utilization exceeds a defined threshold, and creating a CloudWatch dashboard for real-time monitoring. Additionally, it involves installing the stress tool on the EC2 instance to simulate high CPU usage for testing the alarm and notification system.
Summary
- Launch EC2 Instance.
- Create SNS Topic and Subscription.
- Create a CloudWatch Alarm.
- Create a CloudWatch Dashboard.
- Connect to EC2 and Install Stress Tool.
Launch EC2 Instance:
Launch an EC2 instance with the following specifications:
- Instance Type: t2.nano
- Network: Assign a public IP.
- Security Group: Allow SSH (port 22) from your IP.
Create SNS Topic and Subscription:
- Go to the SNS (Simple Notification Service) section in the AWS Management Console.
- Click on Topics > Create Topic.
- Choose Standard as the type.
- Provide a Name for the topic (e.g., EC2-CPU-Alerts).
- Click Create Topic.
- In the newly created topic, click on Create Subscription.
- Set the protocol to Email.
- Enter your email address and click Create Subscription.
- Confirm the subscription by checking your email and clicking on the verification link.
Create a CloudWatch Alarm:
- Go to the CloudWatch section in the AWS Management Console.
- Select Alarms from the sidebar, then click Create Alarm.
- Click Select Metric.
- Navigate to EC2 > Per-Instance Metrics > CPUUtilization.
- Choose the Instance ID of your EC2 instance.
- Set the Statistic to Average and the Period to 1 minute.
- Set the Threshold Type to Static and enter 60 as the value (for greater than 60% CPU utilization).
- Click Next.
- Under Actions, choose Select an existing SNS topic and pick the topic you created earlier.
- Click Next.
- Provide an Alarm Name (e.g., High-CPU-Utilization-Alarm).
- Click Create Alarm.
Create a CloudWatch Dashboard:
- In the CloudWatch console, navigate to Dashboards.
- Click Create Dashboard.
- Provide a Name for the dashboard (e.g., EC2-Monitoring-Dashboard).
- Click Add Widget.
- Choose Line and click Configure.
- Select the same metric used in your alarm (EC2 CPU Utilization).
- Click Create Widget.
- Save the dashboard.
Connect to EC2 and Install Stress Tool:
- Connect your EC2 instance.
- Run the following commands to update the instance and install the stress tool:
- sudo yum update -y
- sudo yum install stress -y
- Use the stress tool to generate CPU load:
- stress --cpu 1 --timeout 300
CPU utilization crosses the threshold:
Alarm Generated:
This lab should give you a hands-on understanding of setting up CloudWatch alarms with SNS and monitoring an EC2 instance's CPU utilization.
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