AWS CloudWatch

1. Create a webhook in your external system that can receive the CloudWatch alarm notifications.

   The webhook should be able to parse and process the payload sent by CloudWatch. Ensure you take note of the webhook URL.

2. In the AWS Management Console, navigate to the CloudWatch service and select Alarms from the left menu.

3. Create a new alarm or select an existing alarm that you want to integrate with the webhook.

4. Click the Actions menu and select Add notification.

5. Select Lambda function as the notification target.

6. Click the Configure details button, then enter a name and description for the notification target.

7. In the Lambda function section, select Create a new Lambda function, then enter a name and description for the function.

8. Choose a runtime for the function and select Create a new role with basic Lambda permissions as the execution role.

9. Under the Function code section, select Edit code inline.

10. Paste the following code into the editor, replacing the webhook URL with the URL of your webhook:

    var https = require('https');

    exports.handler = function(event, context) {

      console.log('Received CloudWatch notification:', JSON.stringify(event, null, 2));

      var postData = JSON.stringify(event);

      var options = {

        hostname: 'your-webhook-url.com',

        port: 443,

        path: '/webhook-endpoint',

        method: 'POST',

        headers: {

          'Content-Type': 'application/json',

          'Content-Length': postData.length

        }

      };

      var req = https.request(options, function(res) {

        console.log('Webhook response status code:', res.statusCode);

        context.succeed();

      });

      req.on('error', function(e) {

        console.log('Error sending webhook:', e);

        context.fail();

      });

      req.write(postData);

      req.end();

    };

11. Click Save to save the function code.

12. Click Create function to create the function and associate it with the CloudWatch alarm.

Once the integration is set up, CloudWatch sends notifications to the Lambda function whenever the alarm threshold is met.

The Lambda function then forwards the notification payload to the webhook URL you specified, allowing you to receive notifications in your external system.

1. Open the AWS console and search for SNS (Simple Notification Service).

   

2. Under Topics, click Create Topic.

   

3. Select the Standard topic type, then give a unique topic name and display name.

   

4. Submit the topic by giving it the proper permissions.

5. In the view topic page, click Create subscription.

   

6. Copy the integration URL and paste it in the HTTPS protocol Endpoint field.

   

7. Continue with the Configuration Procedure.

To configure the topic from the registration procedure to send notifications when AWS CloudWatch alarms meet the threshold:

1. Navigate to the Alarms page in AWS CloudWatch.

   

2. Click on an alarm. The alarm details page opens.

3. Click the Actions button, then select Edit from the menu.

   

4. Update the metrics and conditions then click Next.

5. Under Configure actions, select an existing SNS topic. Choose the created topic at SNS then click Update Alarm.