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AWS Lambda (sdk) InvalidSecurityGroupIDException

The specified security group ID is invalid.

Understanding AWS Lambda and Its Purpose

AWS Lambda is a serverless compute service that allows you to run code without provisioning or managing servers. It automatically scales your application by running code in response to each trigger, such as changes in data, shifts in system state, or user actions. Lambda can be integrated with other AWS services, making it a powerful tool for building scalable and efficient applications.

Identifying the Symptom: InvalidSecurityGroupIDException

When working with AWS Lambda, you might encounter the InvalidSecurityGroupIDException. This error typically arises when you attempt to configure a Lambda function with a security group ID that is not recognized by the system. The error message will indicate that the specified security group ID is invalid.

Exploring the Issue: What Causes InvalidSecurityGroupIDException?

The InvalidSecurityGroupIDException occurs when the security group ID provided does not exist in the specified Virtual Private Cloud (VPC). This can happen if the ID is mistyped, the security group has been deleted, or if the security group belongs to a different VPC than the one specified for the Lambda function.

Common Scenarios Leading to the Error

  • Typographical errors in the security group ID.
  • Security group ID belongs to a different region or VPC.
  • The security group has been deleted or modified.

Steps to Resolve InvalidSecurityGroupIDException

To resolve this issue, follow these steps:

Step 1: Verify the Security Group ID

Ensure that the security group ID is correctly typed and exists in the AWS Management Console. You can do this by navigating to the VPC Dashboard and checking the list of security groups.

Step 2: Confirm the VPC Association

Check that the security group is associated with the correct VPC. You can verify this in the VPC Dashboard by selecting the security group and reviewing its details.

Step 3: Update the Lambda Function Configuration

If the security group ID is incorrect, update your Lambda function configuration with the correct ID. This can be done via the AWS Management Console or using the AWS CLI:

aws lambda update-function-configuration --function-name YourFunctionName --vpc-config SubnetIds=subnet-abc123,SecurityGroupIds=sg-xyz789

Step 4: Test the Configuration

After updating the configuration, test your Lambda function to ensure that it is working as expected without any errors.

Additional Resources

For more information on managing security groups and Lambda configurations, refer to the following resources:

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