How do a trigger a reboot action on lightsail cloudwatch alarm state?

Hello Hunainkapadia,

I understand that you want to trigger a reboot action using CloudWatch alarm on Lightsail. The monitoring that is built in on Amazon Lighsail is only accessible within Lightsail console and are not visible in CloudWatch dashboard by default. If you would like to view Lighsail metrics in CloudWatch and set CloudWatch alarm to trigger an action. You will have to[1]:

1. Create an IAM user with the necessary permissions to submit the CloudWatch metrics data collected from the Lightsail instance.
2. Installing the CloudWatch Agent on your Lightsail.
3. Configuring the CloudWatch Agent to use the IAM user when submitting data to CloudWatch

Once that is done, you can create a CloudWatch Event. Then use that event with a Lambda function to reboot your instance. Below is a sample code you can use to reboot your instance:

import boto3
region = 'us-west-1'
client = boto3.client('lightsail', region_name='region')

def lambda_handler(event, context):
      client.reboot_instance( instanceId='ID-OF-YOUR-LIGHTSAIL-INSTANCE')

For region, replace "us-west-1" with the AWS Region that your instance is in and replace 'ID-OF-YOUR-LIGHTSAIL-INSTANCE' with the ID of the specific instance that you want to reboot.

I hope that this information will be helpful.

Resources:

1. https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/installing-cloudwatch-agent-ssm.html