Using aws efs with elasticbeanstalk

Question

Pulumi · Accepted Answer

Using AWS Elastic File System (EFS) with Elastic Beanstalk can provide durable, scalable file storage for your Elastic Beanstalk applications. You can create an EFS file system and mount it onto the instances that Elastic Beanstalk provisions for your application, allowing these instances to share a common file system.

Below, I will provide a Pulumi program written in TypeScript which creates an EFS file system and an Elastic Beanstalk application. The Elastic Beanstalk environment will be configured to mount the EFS file system to the instances.

First, let's start by defining the EFS file system. We'll create a new file system resource, setting appropriate properties such as `performanceMode` and `throughputMode`, and configure a backup policy if required.

Next, we'll define the Elastic Beanstalk application and environment. For the environment, we need to provide option settings that configure the instances to mount the EFS. AWS Elastic Beanstalk uses configuration templates for this purpose, which can specify environment configurations including the EFS mount commands.

Lastly, we'll output the necessary information such as the Elastic Beanstalk environment's URL and the file system's ID, which can be used to access the application and the file system respectively.

Here's how this would look in a Pulumi TypeScript program:

```typescript
import * as pulumi from '@pulumi/pulumi';
import * as aws from '@pulumi/aws';
import * as awsx from '@pulumi/awsx';

// Create an Elastic File System (EFS)
const fileSystem = new aws.efs.FileSystem('myFileSystem', {
    performanceMode: 'generalPurpose',
    throughputMode: 'bursting',
});

// (Optional) Define a backup policy for EFS
const backupPolicy = new aws.efs.BackupPolicy('myBackupPolicy', {
    fileSystemId: fileSystem.id,
    backupPolicy: {
        status: 'ENABLED',
    },
});

// Create an Elastic Beanstalk Application
const app = new aws.elasticbeanstalk.Application('myApp', {
    description: 'My Elastic Beanstalk Application',
});

// Define the options settings for mounting the EFS to the Elastic Beanstalk instances
const optionSettings: aws.types.input.elasticbeanstalk.EnvironmentOptionSetting[] = [
    {
        namespace: 'aws:elasticbeanstalk:application:environment',
        optionName: 'FILE_SYSTEM_ID',
        value: fileSystem.id,
    },
    {
        namespace: 'aws:elasticbeanstalk:application:environment',
        optionName: 'MOUNT_POINT',
        value: '/mnt/efs',
    },
    // Add any additional options here
];

// Create an Elastic Beanstalk Environment
const env = new aws.elasticbeanstalk.Environment('myEnv', {
    application: app.name,
    solutionStackName: '64bit Amazon Linux 2 v5.4.4 running Node.js 14',
    optionSettings: optionSettings,
});

// Export the URL of the Elastic Beanstalk environment and the EFS File System ID
export const elasticBeanstalkEnvironmentUrl = env.endpointUrl;
export const efsId = fileSystem.id;
```

In this program:

- We import the necessary libraries (`@pulumi/pulumi`, `@pulumi/aws`, `@pulumi/awsx`).
- We create an EFS file system with general purpose performance mode and the default bursting throughput mode.
- We optionally define a backup policy for our EFS file system.
- We create an Elastic Beanstalk application.
- We define option settings for the environment specifying the EFS file system ID and mount point.
- We create an Elastic Beanstalk environment with a specific solution stack (in this case for Node.js) and apply the option settings.
- Finally, we export the URL of the Elastic Beanstalk environment and the file system ID for further use.

This program assumes that the Elastic Beanstalk environment is configured with an instance profile that has the necessary permissions to mount EFS file systems. The instance profile and additional necessary security group settings are not shown but should be included for a complete configuration.

Remember to replace `'64bit Amazon Linux 2 v5.4.4 running Node.js 14'` with the solution stack name that matches the platform your application is using, and adjust the `MOUNT_POINT` to the desired directory within your instances.

To apply this Pulumi program to your AWS environment:

1. Ensure you have Pulumi installed and configured.
2. Save the code to a file with a `.ts` extension.
3. Run `pulumi up` in the directory where the file is saved to create the resources.

Make sure you test the environment to verify that the Elastic Beanstalk instances can correctly mount the EFS file system and that your application functions as expected with the shared file system.