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The CDK Construct Library for AWS::EFS

Project description

Amazon Elastic File System Construct Library


cfn-resources: Stable

All classes with the Cfn prefix in this module (CFN Resources) are always stable and safe to use.

cdk-constructs: Experimental

The APIs of higher level constructs in this module are experimental and under active development. They are subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model and breaking changes will be announced in the release notes. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

This construct library allows you to set up AWS Elastic File System (EFS).

# Example automatically generated without compilation. See
import aws_cdk.aws_efs as efs

my_vpc = ec2.Vpc(self, "VPC")
file_system = efs.FileSystem(self, "MyEfsFileSystem",

A file system can set RemovalPolicy. Default policy is RETAIN.

# Example automatically generated without compilation. See
file_system = FileSystem(self, "EfsFileSystem",

Access Point

An access point is an application-specific view into an EFS file system that applies an operating system user and group, and a file system path, to any file system request made through the access point. The operating system user and group override any identity information provided by the NFS client. The file system path is exposed as the access point's root directory. Applications using the access point can only access data in its own directory and below. To learn more, see Mounting a File System Using EFS Access Points.

Use addAccessPoint to create an access point from a fileSystem:

# Example automatically generated without compilation. See

By default, when you create an access point, the root(/) directory is exposed to the client connecting to the access point. You may specify custom path with the path property. If path does not exist, it will be created with the settings defined in the creationInfo. See Creating Access Points for more details.


To control who can access the EFS, use the .connections attribute. EFS has a fixed default port, so you don't need to specify the port:

# Example automatically generated without compilation. See

Mounting the file system using User Data

In order to automatically mount this file system during instance launch, following code can be used as reference:

# Example automatically generated without compilation. See
vpc = ec2.Vpc(self, "VPC")

file_system = efs.FileSystem(self, "MyEfsFileSystem",

inst = Instance(self, "inst",
    instance_type=InstanceType.of(InstanceClass.T2, InstanceSize.LARGE),
        "subnet_type": SubnetType.PUBLIC


inst.user_data.add_commands("yum check-update -y", "yum upgrade -y", "yum install -y amazon-efs-utils", "yum install -y nfs-utils", "file_system_id_1=" + file_system.file_system_id, "efs_mount_point_1=/mnt/efs/fs1", "mkdir -p \"${efs_mount_point_1}\"", "test -f \"/sbin/mount.efs\" && echo \"${file_system_id_1}:/ ${efs_mount_point_1} efs defaults,_netdev\" >> /etc/fstab || " + "echo \"${file_system_id_1}.efs." + cdk.Stack.of(self).region + " ${efs_mount_point_1} nfs4 nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,noresvport,_netdev 0 0\" >> /etc/fstab", "mount -a -t efs,nfs4 defaults")

This module is part of the AWS Cloud Development Kit project.

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