AWS Lambda 从 EC2 实例释放弹性 IP 地址

Question

I am relatively new to AWS and Lambdas. I have deployed a lambda and its API gateway. This Lambda is using the aws-sdk to describe EC2 instances. I would like to know if it's possible to use aws-sdk within the Lambda to release the IP Address from a given EC2 Instance Id. I can see in the aws-sdk documentation other methods to in example create an EC2 instance, create tags on the instance or reboot, start, stop the EC2 instance but so far in the aws-sdk documentation I don't find a method that I can use to release the IP Address from the EC2 instance. The only option I have found is in this SO question Call aws-cli from AWS Lambda that is for calling aws-cli commands within the Lambda but that seems it will require a complicated and cumbersome deployment and packaging process. Any help will be greatly appreciated.

Answer 1

The API call to disassociate elastic IP address from an instance is (in boto3):

• disassociate_address - Disassociates an Elastic IP address from the instance or network interface it's associated with.

Once disassociated, you can then release_address to the AWS pool as to not pay for it, if you want.