can lambda access efs

Full Answer

How do you get EFS from Lambda function?

Connecting to a file system (console)Open the Functions page of the Lambda console.Choose a function.Choose Configuration and then choose File systems.Under File system, choose Add file system.Configure the following properties: EFS file system – The access point for a file system in the same VPC.

Can we use EBS with Lambda?

You can't use EBS volumes with lambda. They are used with EC2 instances only. For the lambda you can use EFS only.

How do I access my EFS in AWS?

To access your Amazon EFS file system in a VPC, you create one or more mount targets in the VPC. For file systems using Standard storage classes, you can create a mount target in each availability Zone in the AWS Region.

How can one configure Lambda such that it has access to an EFS volume?

In the File system configuration:From the EFS file system dropdown, select the required file system. From the Access point dropdown, choose the required EFS access point.In the Local mount path, enter the path your Lambda function uses to access this resource. Enter an absolute path.Choose Save.

Does AWS Lambda support ES6?

The Node14 Lambda runtime recently got support to ES6 modules and top-level await. Using them, the handler can support more modern structures. Previously, the handler had to use CommonJS: // commonjs // import is via require const dep = require("./dep.

Can Lambda read from S3?

The Lambda function retrieves the source S3 bucket name and the key name of the uploaded object from the event parameter that it receives. The function uses the Amazon S3 getObject API to retrieve the content type of the object.

Where is EFS accessible from?

Shared Storage Files are accessible from AWS services as well as from on-premise. They can be simultaneously accessed by up to a thousand EC2 instances within the cloud or via VPN or AWS Direct Connect, making EFS good for hybrid solutions.

Can you ssh into an EFS?

AWS Transfer Family is a fully managed AWS service that you can use to transfer files into and out of Amazon EFS file systems over the following protocols: Secure Shell (SSH) File Transfer Protocol (SFTP) (AWS Transfer for SFTP)

Can EFS be accessed from on premise?

You can mount your Amazon EFS file systems on your on-premises data center servers when connected to your Amazon VPC with Amazon Direct Connect or Amazon VPN You can mount your EFS file systems on on-premises servers to migrate datasets to EFS, enable cloud bursting scenarios, or backup your on-premises data to Amazon ...

Can Lambda trigger SNS?

You can use a Lambda function to process Amazon Simple Notification Service (Amazon SNS) notifications. Amazon SNS supports Lambda functions as a target for messages sent to a topic.

Does Lambda need load balancer?

You can use a Lambda function to process requests from an Application Load Balancer. Elastic Load Balancing supports Lambda functions as a target for an Application Load Balancer. Use load balancer rules to route HTTP requests to a function, based on path or header values.

Can Lambda run without Trigger?

Pay for the services you use. You don't have to manage the infrastructure. You can scale the service automatically up and down.

Can you install container services on Lambda?

Lambda supports only Linux-based container images. Lambda provides multi-architecture base images. However, the image you build for your function must target only one of the architectures. Lambda does not support functions that use multi-architecture container images.

Can you use Lambda with EC2?

The EC2 cloud service provides automatic scaling and load balancing. EC2 instances can work in conjunction with most other Amazon web services, such as S3, ECS, Route53, Cloudwatch, etc. Lambda.

Is AWS EBS serverless?

AWS offers technologies for running code, managing data, and integrating applications, all without managing servers. Serverless technologies feature automatic scaling, built-in high availability, and a pay-for-use billing model to increase agility and optimize costs.

Can Lambda Access EC2?

From AWS Lambda, SSH into your EC2 instances and run commands. AWS Lambda lets you run arbitrary code without worrying about provisioning servers. I recently worked on a project where a Lambda function SSHed into an EC2 instance and ran some commands. This is a very powerful way to control access to your EC2 instances.

Capabilities and behaviors of Lambda with EFS

EFS is built to scale on demand to petabytes of data, growing and shrinking automatically as files are written and deleted. When used with Lambda, your code has low-latency access to a file system where data is persisted after the function terminates.

Creating an EFS file system

Configuring EFS for Lambda is straight-forward. I show how to do this in the AWS Management Console but you can also use the AWS CLI, AWS SDK, AWS Serverless Application Model (AWS SAM), and AWS CloudFormation. EFS file systems are always created within a customer VPC, so Lambda functions using the EFS file system must all reside in the same VPC.

Working with AWS Cloud9 and Amazon EC2

You can mount EFS access points on Amazon EC2 instances. This can be useful for browsing file systems contents and downloading files from other locations. The EFS console shows customized mount instructions directly under each created file system:

Sharing large code packages with Lambda

EFS is useful for sharing software packages or binaries that are otherwise too large for Lambda layers. You can copy these to EFS and have Lambda use these packages as if there are installed in the Lambda deployment package.

Configuring AWS Lambda to use EFS

Lambda functions that access EFS must run from within a VPC. Read this guide to learn more about setting up Lambda functions to access resources from a VPC. There are also sample CloudFormation templates you can use to configure private and public VPC access.

Example applications

You can view and download these examples from this GitHub repository. To deploy, follow the instructions in the repo’s README.md file.

Conclusion

EFS for Lambda allows you to share data across function invocations, read large reference data files, and write function output to a persistent and shared store. After configuring EFS, you provide the Lambda function with an access point ARN, allowing you to read and write to this file system.

Execution role and user permissions

Lambda uses your function's permissions to mount file systems. To connect to a file system, your function's execution role must have the following permissions in addition to the permissions required to connect to the file system's VPC:

Configuring a file system and access point

Create a file system in Amazon EFS with a mount target in every Availability Zone that your function connects to. For performance and resilience, use at least two Availability Zones. For example, in a simple configuration you could have a VPC with two private subnets in separate Availability Zones.

Connecting to a file system (console)

A function connects to a file system over the local network in a VPC. The subnets that your function connects to can be the same subnets that contain mount points for your file system, or subnets in the same Availability Zone that can route NFS traffic (port 2049) to the file system.

Configuring file system access with the Lambda API

Use the following API operations to connect your Lambda function to a file system:

AWS CloudFormation and AWS SAM

You can use AWS CloudFormation and the AWS Serverless Application Model (AWS SAM) to automate the creation of Lambda applications. To enable a file system connection on an AWS SAM AWS::Serverless::Function resource, use the FileSystemConfigs property.

Sample applications

The GitHub repository for this guide includes a sample application that demonstrates the use of Amazon EFS with a Lambda function.

What is EFS in Lambda?

EFS is a storage unit that lives independently inside a machine. This file can be attached to other services like EC2 and can be accessed from multiple instances at once. Files that are inside this storage unit are accessible from any connected instance or Lambda.

How to connect to Lambda?

Connect it With Lambda. 1. Click on Service and search for “Lambda”. 2. Create a new function and choose your preferred runtime language. In this article, I’ll use Python. 3. Go down a little bit, and you’ll see a section called “VPC”. Click on “Edit”.

Why do you need multiple lambdas?

If you need multiple Lambdas to use (read and write) BIG files, you’ll need them to be in a place that doesn’t delay the function to get the resources , which leads to less computing power and time -> less money.

Is EFS a milestone in Lambda?

Adding EFS to Lambda is a huge new milestone in The Serverless architecture . You can have new use-cases that will be doable and before were a nightmare to accomplish. Easy steps with the cheap price make Lambda an option that can battle EC2 in some new modern use-cases.

How to use EFS in Lambda?

This is done using an EFS AccessPoint.

How to get more insight into what the file system looks like inside Lambda?

We can get more insight into what the file system looks like inside Lambda by exposing a REST endpoint to run commands inside the a Lambda function. This will allow us to run curl to run commands to populate and read the contents of the file system.

What is EFS filesystem?

An EFS FileSystem is a regional service, but accessing it requires adding mount points to a VPC. We can add those to the private subnets where our Functions will run. Each mount target has a security group, and we can use the default security group to allow access only from other compute resources in the same security group in our VPC. We could also use an existing FileSystem and mount targets if they have already been provisioned for another application.

How much local disk space does Lambda use?

You need more local disk than the 512MB of /tmp space available to a single Lambda Function.

Does AWS support EFS?

First EKS for Kubernetes, then ECS and Fargate for containers. Today, AWS announced that EFS is now also supported in Lambda, providing easy access to network file systems from your serverless functions.

Can Lambda be used with EFS?

We now have our infrastructure all set up to start using Lambda with EFS. Let’s build an app!

Does Lambda use AWS?

Storing data to the file system is particularly natural for the kind of small functions common in Lambda - no need to use the AWS SDK - just call fs.writeFileSync () (or equivalent for your language of choice).

What is Lambda engine?

Lambda was designed to process events as part of an event-driven, micro-services architecture – processing smaller payloads at scale. Since launch, the little Lambda engine have been pushed to its limits, with customers still asking for longer run-times. 15 minutes offer you a great deal of power, but you should re-consider if these limits are being reached (ECS Fargate may be more appropriate)

Does Amazon EFS work with AWS Lambda?

Amazon EFS integration with AWS Lambda resolves several real-world pain points on larger file processing use cases in AWS Lambda, however, should be used with caution and in conjunction with experience-based design decisions.

Is Amazon EFS a regional service?

Amazon EFS is a regional service (durable and available), but the mount targets are Availability Zone specific. Best practice is for the EFS file system to have mount targets in all AZs that you plan to execute the Lambda functions in – and then to have the VPC-Lambda functions deploy/execute in all available AZs.#N#Using EFS forces the Lambda to be VPC connected – not a showstopper as this would be the same for most datastores like RDS, ElastiCache and a few others. However, if you are using EFS where S3 would be just as suitable as an asset storage location and you have no other need to run the Lambda inside a VPC – perhaps EFS should be reconsidered.#N#Inter Process or Inter Lambda State Management – my recommendation is don’t. Process state should be small bits of information that indicate the status of a job or point to the location of partly processed job assets. State belongs in sub-millisecond stores such as DynamoDB or ElastiCache (SNS or SQS even). If you do not already have an ElastiCache cluster at your disposal and money over architecture-best-practice is a concern – DynamoDB is a very good or just as good alternative for durable state management.#N#Using EFS (or S3) for very small files/data payloads to perform batch processing like in the olden days. This is where knowledge and expertise are needed to make the best-practice, cloud native architecture decisions. Large volumes of small payloads (1-1MB) belong in streaming or event-driven architectures. SNS, SQS or Kinesis is the swiss-army knife of such processing requirements and do not belong in EFS.#N#Where both large object size and velocity (frequency) are at play, the same pattern as above should be used. A small payload to manage process-state being event-driven in SNS, SQS or Kinesis, and only the large assets (videos) stored on EFS.

Execution Role and User Permissions

Configuring A File System and Access Point

Connecting to A File System

Configuring File System Access with The Lambda API

• Use the following API operations to connect your Lambda function to a file system: To connect a function to a file system, use the update-function-configuration command. The following example connects a function named my-functionto a file system with ARN of an access point. You can get the ARN of a file system's access point with the describe-acces...

See more on docs.aws.amazon.com

AWS CloudFormation and AWS Sam

Sample Applications