I am excited to share that the long-awaited capability to access resources within a VPC from your AWS Lambda functions is now live! This feature enables your Lambda functions to interact with Amazon Redshift data warehouses, Amazon ElastiCache clusters, Amazon RDS instances, and service endpoints that are restricted to specific VPCs.
To utilize this feature, simply select the desired VPC and specify the relevant subnets and security groups. AWS Lambda will automatically create elastic network interfaces (ENIs) and assign private IP addresses from your chosen subnet(s), granting your Lambda function access to the resources within the VPC.
Setting Up VPC Access
You can configure VPC access when creating a new Lambda function or update an existing one to include VPC access. This can be easily done via the Lambda Console or the CLI. For step-by-step instructions on setting it up from the Console, feel free to refer to this another blog post that offers helpful insights.
Important Considerations
Here are a few crucial facts to keep in mind regarding this new functionality:
- ENI & IP Address Resources – As Lambda scales to accommodate the number of events it processes, ensure your VPC has an adequate supply of free IP addresses within the designated subnets.
- Internet Access – Once you enable VPC access for a function, it loses default Internet connectivity. If your function requires Internet access, consider setting up a Managed NAT Gateway in your VPC (see Managed NAT Gateway for AWS for more information) or implement your own NAT solution.
- Security Groups – The security groups you assign will determine the function’s access to resources both within the subnets and on the Internet.
- S3 Endpoints – This feature also allows you to access S3 endpoints within the VPC.
- Webinar – For more in-depth information, join our upcoming webinar titled “Essentials: Introducing AWS VPC Support for AWS Lambda.”
This new capability can greatly enhance your applications by allowing seamless integration with VPC resources. For further information on learning and development resources, check out this excellent resource: AWS Learning and Development.
— Alex
Amazon IXD – VGT2
6401 E Howdy Wells Ave, Las Vegas, NV 89115
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