How to check instance state and status via Lambda function in AWS

Question

Hi Guys, 

I have my EC2 instances in AWS. I want to monitor status of that instances using AWS Lambda function.

How can I do that?

Thank You

Answer 1

Hi@akhtar,

To do this task, you have to use three services (EC2, IAM, Lambda) of AWS. 

• Create EC2 instances.

• Create IAM Role with AmazonEC2ReadOnlyAccess and AWSLambdaBasicExecutionRole access.

• Write below given code in Lambda function and run.

import json
import boto3
from pprint import pprint
def lambda_handler(event, context):
    # TODO implement
    client = boto3.client("ec2")
    status = client.describe_instance_status(IncludeAllInstances = True)
    #pprint(status)
    for i in status["InstanceStatuses"]:
        print("AvailabilityZone :", i["AvailabilityZone"])
        print("InstanceId :", i["InstanceId"])
        print("InstanceState :", i["InstanceState"])
        print("InstanceStatus", i["InstanceStatus"])
    return {
        'statusCode': 200,
        'body': json.dumps('Hello from Lambda!')
    }

Thank You

Comments

How to write this state in DynamoDB table.

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If you are trying to use the state in your DynamoDB table then use the connector and store the output in your database.

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Hi,

I tried to execute the function but it gives me timeout.

"errorMessage": "2020-11-04T06:54:27.496Z 42ae4cb3-a352-4f5a-aaaf-a2368a72a5fd Task timed out after 3.00 seconds"

Can anyone help...

Thanks.

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Hi@tsm,

Check your network connectivity first. If it is fine, then check your security group and allow the traffic. It will work.

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hi increase lambda execution time in configuration tab

Answer 2

import boto3

Answer 3

import boto3
from pprint import pprint

def lambda_handler(event, context):
    
    # Obtain information about the instance
    instance = boto3.client("ec2")
    
    ec2status = instance.describe_instance_status(IncludeAllInstances = True)
    pprint(ec2status)

Comments

how can i use this to send email alert on status check failed