AWS CloudWatch Events Tutorial

What is AWS CloudWatch Events?

AWS CloudWatch Events is a service that helps you to respond to changes in your AWS resources. It monitors events that occur in your AWS account and takes action in response to those events. You can use CloudWatch Events to automate tasks, schedule actions, and send notifications.

How to create an AWS CloudWatch Event using the AWS Management Console:

  1. Log in to your AWS Management Console.
  2. Navigate to the CloudWatch service.
  3. Select “Events” from the left-hand menu.
  4. Click “Create rule”.
  5. Choose an event source. This can be a pre-defined AWS service, a custom event pattern, or a schedule.
  6. Configure the event pattern or schedule as needed.
  7. Choose a target for the event. This can be an AWS service, a Lambda function, or an SNS topic.
  8. Click “Configure details”.
  9. Give your rule a name and description.
  10. Click “Create rule”.

How to create an AWS CloudWatch Event using the AWS CLI:

  1. Open your terminal and make sure you have the AWS CLI installed.
  2. Run the following command to create a new rule:
aws events put-rule --name "my-rule" --event-pattern "{\"source\": [\"aws.ec2\"], \"detail-type\": [\"EC2 Instance State-change Notification\"]}"

This command creates a new rule with the name “my-rule” that triggers on EC2 instance state change notifications.

3. Run the following command to create a new target for your rule:

aws events put-targets --rule "my-rule" --targets "[{\"Id\": \"my-target\", \"Arn\": \"arn:aws:lambda:us-west-2:123456789012:function:my-function\"}]"

This command creates a new target for the rule with the ID “my-target” that sends events to the specified Lambda function.

(Optional) Run the following command to enable your rule:

aws events enable-rule --name "my-rule"
  1. This command enables your rule so that it starts triggering on events.

How to view AWS CloudWatch Events using the AWS Management Console:

  1. Log in to your AWS Management Console.
  2. Navigate to the CloudWatch service.
  3. Select “Events” from the left-hand menu.
  4. You will see a list of all of your rules. Click on a rule to view its details, including its status, event pattern, and targets.

How to view AWS CloudWatch Events using the AWS CLI:

  1. Open your terminal and run the following command to view a list of all of your rules:
aws events list-rules

2. Run the following command to view details about a specific rule:

aws events describe-rule --name "my-rule"
  1. Replace “my-rule” with the name of the rule you want to view.

That’s it! AWS CloudWatch Events can help you automate tasks and respond to changes in your AWS resources.