Syntax Properties Return values Examples See also

AWS::EFS::FileSystem

The AWS::EFS::FileSystem resource creates a new, empty file system in Amazon Elastic File System (Amazon EFS). You must create a mount target (AWS::EFS::MountTarget) to mount your EFS file system on an Amazon EC2 or other AWS cloud compute resource.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON


{
  "Type" : "AWS::EFS::FileSystem",
  "Properties" : {
      "AvailabilityZoneName" : String,
      "BackupPolicy" : BackupPolicy,
      "BypassPolicyLockoutSafetyCheck" : Boolean,
      "Encrypted" : Boolean,
      "FileSystemPolicy" : Json,
      "FileSystemTags" : [ ElasticFileSystemTag, ... ],
      "KmsKeyId" : String,
      "LifecyclePolicies" : [ LifecyclePolicy, ... ],
      "PerformanceMode" : String,
      "ProvisionedThroughputInMibps" : Double,
      "ThroughputMode" : String
    }
}

YAML


Type: AWS::EFS::FileSystem
Properties: 
  AvailabilityZoneName: String
  BackupPolicy: 
    BackupPolicy
  BypassPolicyLockoutSafetyCheck: Boolean
  Encrypted: Boolean
  FileSystemPolicy: Json
  FileSystemTags: 
    - ElasticFileSystemTag
  KmsKeyId: String
  LifecyclePolicies: 
    - LifecyclePolicy
  PerformanceMode: String
  ProvisionedThroughputInMibps: Double
  ThroughputMode: String

Properties

AvailabilityZoneName

Used to create a file system that uses One Zone storage classes. It specifies the AWS Availability Zone in which to create the file system. Use the format us-east-1a to specify the Availability Zone. For more information about One Zone storage classes, see Using EFS storage classes in the Amazon EFS User Guide.

Note

One Zone storage classes are not available in all Availability Zones in AWS Regions where Amazon EFS is available.

Required: No

Type: String

Minimum: 1

Maximum: 64

Pattern: .+

Update requires: Replacement

BackupPolicy

Use the BackupPolicy to turn automatic backups on or off for the file system.

Required: No

Type: BackupPolicy

Update requires: No interruption

BypassPolicyLockoutSafetyCheck

(Optional) A boolean that specifies whether or not to bypass the FileSystemPolicy lockout safety check. The lockout safety check determines whether the policy in the request will lock out, or prevent, the IAM principal that is making the request from making future PutFileSystemPolicy requests on this file system. Set BypassPolicyLockoutSafetyCheck to True only when you intend to prevent the IAM principal that is making the request from making subsequent PutFileSystemPolicy requests on this file system. The default value is False.

Required: No

Type: Boolean

Update requires: No interruption

Encrypted

A Boolean value that, if true, creates an encrypted file system. When creating an encrypted file system, you have the option of specifying a KmsKeyId for an existing AWS KMS key. If you don't specify a KMS key, then the default KMS key for Amazon EFS, /aws/elasticfilesystem, is used to protect the encrypted file system.

Required: Conditional

Type: Boolean

Update requires: Replacement

FileSystemPolicy

The FileSystemPolicy for the EFS file system. A file system policy is an IAM resource policy used to control NFS access to an EFS file system. For more information, see Using IAM to control NFS access to Amazon EFS in the Amazon EFS User Guide.

Required: No

Type: Json

Minimum: 1

Maximum: 20000

Pattern: [\s\S]+

Update requires: No interruption

FileSystemTags

Use to create one or more tags associated with the file system. Each tag is a user-defined key-value pair. Name your file system on creation by including a "Key":"Name","Value":"{value}" key-value pair. Each key must be unique. For more information, see Tagging AWS resources in the AWS General Reference Guide.

Required: No

Type: List of ElasticFileSystemTag

Update requires: No interruption

KmsKeyId

The ID of the AWS KMS key to be used to protect the encrypted file system. This parameter is only required if you want to use a nondefault KMS key. If this parameter is not specified, the default KMS key for Amazon EFS is used. This ID can be in one of the following formats:

Key ID - A unique identifier of the key, for example 1234abcd-12ab-34cd-56ef-1234567890ab.
ARN - An Amazon Resource Name (ARN) for the key, for example arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab.
Key alias - A previously created display name for a key, for example alias/projectKey1.
Key alias ARN - An ARN for a key alias, for example arn:aws:kms:us-west-2:444455556666:alias/projectKey1.

If KmsKeyId is specified, the Encrypted parameter must be set to true.

Required: No

Type: String

Maximum: 2048

Pattern: ^([0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}|mrk-[0-9a-f]{32}|alias/[a-zA-Z0-9/_-]+|(arn:aws[-a-z]*:kms:[a-z0-9-]+:\d{12}:((key/[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})|(key/mrk-[0-9a-f]{32})|(alias/[a-zA-Z0-9/_-]+))))$

Update requires: Replacement

LifecyclePolicies

An array of LifecyclePolicy objects that define the file system's LifecycleConfiguration object. A LifecycleConfiguration object informs EFS lifecycle management and intelligent tiering of the following:

When to move files in the file system from primary storage to the IA storage class.
When to move files that are in IA storage to primary storage.

Note

Amazon EFS requires that each LifecyclePolicy object have only a single transition. This means that in a request body, LifecyclePolicies needs to be structured as an array of LifecyclePolicy objects, one object for each transition, TransitionToIA, TransitionToPrimaryStorageClass. See the example requests in the following section for more information.

Required: No

Type: List of LifecyclePolicy

Maximum: 2

Update requires: No interruption

PerformanceMode

The performance mode of the file system. We recommend generalPurpose performance mode for most file systems. File systems using the maxIO performance mode can scale to higher levels of aggregate throughput and operations per second with a tradeoff of slightly higher latencies for most file operations. The performance mode can't be changed after the file system has been created.

Note

The maxIO mode is not supported on file systems using One Zone storage classes.

Required: No

Type: String

Allowed values: generalPurpose | maxIO

Update requires: Replacement

ProvisionedThroughputInMibps

The throughput, measured in MiB/s, that you want to provision for a file system that you're creating. Valid values are 1-1024. Required if ThroughputMode is set to provisioned. The upper limit for throughput is 1024 MiB/s. To increase this limit, contact AWS Support. For more information, see Amazon EFS quotas that you can increase in the Amazon EFS User Guide.

Required: Conditional

Type: Double

Update requires: No interruption

ThroughputMode

Specifies the throughput mode for the file system, either bursting or provisioned. If you set ThroughputMode to provisioned, you must also set a value for ProvisionedThroughputInMibps. After you create the file system, you can decrease your file system's throughput in Provisioned Throughput mode or change between the throughput modes, as long as it’s been more than 24 hours since the last decrease or throughput mode change. For more information, see Specifying throughput with provisioned mode in the Amazon EFS User Guide.

Default is bursting.

Required: No

Type: String

Allowed values: bursting | provisioned

Update requires: No interruption

Return values

Ref

When you pass the logical ID of this resource to the intrinsic Ref function, Ref returns the FileSystem ID. For example:

{"Ref":"logical_file_system_id"}

returns fs-0123456789abcdef2.

For more information about using the Ref function, see Ref.

Fn::GetAtt

The Fn::GetAtt intrinsic function returns a value for a specified attribute of this type. The following are the available attributes and sample return values.

For more information about using the Fn::GetAtt intrinsic function, see Fn::GetAtt.

Arn

The Amazon Resource Name (ARN) of the EFS file system.

Example: arn:aws:elasticfilesystem:us-west-2:1111333322228888:file-system/fs-0123456789abcdef8

FileSystemId

The ID of the EFS file system. For example: fs-abcdef0123456789a

Examples

Create an encrypted EFS file system using EFS Standard storage classes

The following example declares an Amazon EFS file system with the following attributes:

Uses EFS Standard storage classes.
maxIO performance mode.
Lifecycle management and Intelligent Tiering enabled.
Encrypted at rest.
Automatic daily backups are enabled.
File system policy granting read-only access to the EfsReadOnly IAM role.
File system access:
- Mount targets in three Availability Zones.
- An access point providing an application-specific entry point to the file system.

JSON


"{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "MountTargetVPC": {
            "Type": "AWS::EC2::VPC",
            "Properties": {
                "CidrBlock": "172.31.0.0/16"
            }
        },
        "MountTargetSubnetOne": {
            "Type": "AWS::EC2::Subnet",
            "Properties": {
                "CidrBlock": "172.31.1.0/24",
                "VpcId": {
                    "Ref": "MountTargetVPC"
                },
                "AvailabilityZone": "us-east-1a"
            }
        },
        "MountTargetSubnetTwo": {
            "Type": "AWS::EC2::Subnet",
            "Properties": {
                "CidrBlock": "172.31.2.0/24",
                "VpcId": {
                    "Ref": "MountTargetVPC"
                },
                "AvailabilityZone": "us-east-1b"
            }
        },
        "MountTargetSubnetThree": {
            "Type": "AWS::EC2::Subnet",
            "Properties": {
                "CidrBlock": "172.31.3.0/24",
                "VpcId": {
                    "Ref": "MountTargetVPC"
                },
                "AvailabilityZone": "us-east-1c
            }
        },
       "FileSystemResource": {
            "Type": "AWS::EFS::FileSystem",
            "Properties": {
                "PerformanceMode": "maxIO",
                "LifecyclePolicies":[
                    {
                        "TransitionToIA" : "AFTER_30_DAYS"
                    },
                    {
                        "TransitionToPrimaryStorageClass" : "AFTER_1_ACCESS"
                    }
                ],    
                "Encrypted": true,
                "FileSystemTags": [
                    {
                        "Key": "Name",
                        "Value": "TestFileSystem"
                    }
                ],
                "FileSystemPolicy": {
                    "Version": "2012-10-17",
                    "Statement": [
                        {
                            "Effect": "Allow",
                            "Action": [
                                "elasticfilesystem:ClientMount"
                            ],
                            "Principal":  {"AWS": "arn:aws:iam::111122223333:role/EfsReadOnly"}
                        }
                    ]
                },
                "BackupPolicy": {
                    "Status": "ENABLED"
                    },
                "KmsKeyId": {
                    "Fn::GetAtt": [
                        "key",
                        "Arn"
                    ]
                }
            } 
        },
        "key": {
            "Type": "AWS::KMS::Key",
            "Properties": {
                "KeyPolicy": {
                    "Version": "2012-10-17",
                    "Id": "key-default-1",
                    "Statement": [
                        {
                            "Sid": "Allow administration of the key",
                            "Effect": "Allow",
                            "Principal": {
                                "AWS": {
                                    "Fn::Join": [
                                        "",
                                        [
                                            "arn:aws:iam::",
                                            {
                                                "Ref": "AWS::AccountId"
                                            },
                                            ":root"
                                        ]
                                    ]
                                }
                            },
                            "Action": [
                                "kms:*"
                            ],
                            "Resource": "*"
                        }
                    ]
                }
            }
        },
        "MountTargetResource1": {
            "Type": "AWS::EFS::MountTarget",
            "Properties": {
                "FileSystemId": {
                    "Ref": "FileSystemResource"
                },
                "SubnetId": {
                    "Ref": "MountTargetSubnetOne"
                },
                "SecurityGroups": [
                    {
                        "Fn::GetAtt": [
                            "MountTargetVPC",
                            "DefaultSecurityGroup"
                        ]
                    }
                ]
            }
        },
        "MountTargetResource2": {
            "Type": "AWS::EFS::MountTarget",
            "Properties": {
                "FileSystemId": {
                    "Ref": "FileSystemResource"
                },
                "SubnetId": {
                    "Ref": "MountTargetSubnetTwo"
                },
                "SecurityGroups": [
                    {
                        "Fn::GetAtt": [
                            "MountTargetVPC",
                            "DefaultSecurityGroup"
                        ]
                    }
                ]
            }
        },
        "MountTargetResource3": {
            "Type": "AWS::EFS::MountTarget",
            "Properties": {
                "FileSystemId": {
                    "Ref": "FileSystemResource"
                },
                "SubnetId": {
                    "Ref": "MountTargetSubnetThree"
                },
                "SecurityGroups": [
                    {
                        "Fn::GetAtt": [
                            "MountTargetVPC",
                            "DefaultSecurityGroup"
                        ]
                    }
                ]
            }
        },
        "AccessPointResource": {
            "Type": "AWS::EFS::AccessPoint",
            "Properties": {
                "FileSystemId": {
                    "Ref": "FileSystemResource"
                },
                "PosixUser": {
                    "Uid": "13234",
                    "Gid": "1322",
                    "SecondaryGids": [
                        "1344",
                        "1452"
                    ]
                },
                "RootDirectory": {
                    "CreationInfo": {
                        "OwnerGid": "708798",
                        "OwnerUid": "7987987",
                        "Permissions": "0755"
                    },
                    "Path": "/testcfn/abc"
                }
            }
        }
    }
}

YAML


AWSTemplateFormatVersion: 2010-09-09
Resources:
  MountTargetVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 172.31.0.0/16
 
  MountTargetSubnetOne:
    Type: AWS::EC2::Subnet
    Properties:
      CidrBlock: 172.31.1.0/24
      VpcId: !Ref MountTargetVPC
     AvailabilityZone: "us-east-1a"

  MountTargetSubnetTwo:
    Type: AWS::EC2::Subnet
    Properties:
      CidrBlock: 172.31.2.0/24
      VpcId: !Ref MountTargetVPC
      AvailabilityZone: "us-east-1b"

  MountTargetSubnetThree:
    Type: AWS::EC2::Subnet
    Properties:
      CidrBlock: 172.31.3.0/24
      VpcId: !Ref MountTargetVPC
      AvailabilityZone: "us-east-1c"
 
  FileSystemResource:
    Type: 'AWS::EFS::FileSystem'
    Properties:
      BackupPolicy:
        Status: ENABLED
      PerformanceMode: maxIO
      Encrypted: true
      LifecyclePolicies:
        - TransitionToIA: AFTER_30_DAYS
        - TransitionToPrimaryStorageClass: AFTER_1_ACCESS
      FileSystemTags:
        - Key: Name
          Value: TestFileSystem
      FileSystemPolicy:
        Version: "2012-10-17"
        Statement:
          - Effect: "Allow"
            Action:
              - "elasticfilesystem:ClientMount"
            Principal:
                AWS: 'arn:aws:iam::111122223333:role/EfsReadOnly'
      KmsKeyId: !GetAtt 
        - key
        - Arn
  key:
    Type: AWS::KMS::Key
    Properties:
      KeyPolicy:
        Version: 2012-10-17
        Id: key-default-1
        Statement:
          - Sid: Allow administration of the key
            Effect: Allow
            Principal:
              AWS: !Join 
                - ''
                - - 'arn:aws:iam::'
                  - !Ref 'AWS::AccountId'
                  - ':root'
            Action:
              - 'kms:*'
            Resource: 
              - '*'

  MountTargetResource1:
    Type: AWS::EFS::MountTarget
    Properties:
      FileSystemId: !Ref FileSystemResource
      SubnetId: !Ref MountTargetSubnetOne
      SecurityGroups:
      - !GetAtt MountTargetVPC.DefaultSecurityGroup

  MountTargetResource2:
    Type: AWS::EFS::MountTarget
    Properties:
      FileSystemId: !Ref FileSystemResource
      SubnetId: !Ref MountTargetSubnetTwo
      SecurityGroups:
      - !GetAtt MountTargetVPC.DefaultSecurityGroup

  MountTargetResource3:
    Type: AWS::EFS::MountTarget
    Properties:
      FileSystemId: !Ref FileSystemResource
      SubnetId: !Ref MountTargetSubnetThree
      SecurityGroups:
      - !GetAtt MountTargetVPC.DefaultSecurityGroup
 
  AccessPointResource:
    Type: 'AWS::EFS::AccessPoint'
    Properties:
      FileSystemId: !Ref FileSystemResource
      PosixUser:
        Uid: "13234"
        Gid: "1322"
        SecondaryGids:
          - "1344"
          - "1452"
      RootDirectory:
        CreationInfo:
          OwnerGid: "708798"
          OwnerUid: "7987987"
          Permissions: "0755"
        Path: "/testcfn/abc"

Create a file system using EFS One Zone storage classes

The following example declares an encrypted Amazon EFS file system using One Zone storage classes in the us-east-1a Availability Zone.

JSON


"{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "MountTargetVPC": {
            "Type": "AWS::EC2::VPC",
            "Properties": {
                "CidrBlock": "172.31.0.0/16"
            }
        },
        "MountTargetSubnetOne": {
            "Type": "AWS::EC2::Subnet",
            "Properties": {
                "CidrBlock": "172.31.1.0/24",
                "VpcId": {
                    "Ref": "MountTargetVPC"
                },
                "AvailabilityZone": "us-east-1a"
            }
        },
       "FileSystemResource": {
            "Type": "AWS::EFS::FileSystem",
            "Properties": {
                "AvailabilityZoneName": "us-east-1a",
                "LifecyclePolicies":[
                    {
                        "TransitionToIA" : "AFTER_30_DAYS"
                    },
                    {
                        "TransitionToPrimaryStorageClass" : "AFTER_1_ACCESS"
                    }
                ],
                "Encrypted": true,
                "FileSystemTags": [
                    {
                        "Key": "Name",
                        "Value": "TestFileSystem"
                    }
                ],
                "FileSystemPolicy": {
                    "Version": "2012-10-17",
                    "Statement": [
                        {
                            "Effect": "Allow",
                            "Action": [
                                "elasticfilesystem:ClientMount"
                            ],
                            "Principal":  {"AWS": "arn:aws:iam::111122223333:role/EfsReadOnly"}
                        }
                    ]
                },
                "BackupPolicy": {
                    "Status": "ENABLED"
                    },
                "KmsKeyId": {
                    "Fn::GetAtt": [
                        "key",
                        "Arn"
                    ]
                }
            } 
        },
        "key": {
            "Type": "AWS::KMS::Key",
            "Properties": {
                "KeyPolicy": {
                    "Version": "2012-10-17",
                    "Id": "key-default-1",
                    "Statement": [
                        {
                            "Sid": "Allow administration of the key",
                            "Effect": "Allow",
                            "Principal": {
                                "AWS": {
                                    "Fn::Join": [
                                        "",
                                        [
                                            "arn:aws:iam::",
                                            {
                                                "Ref": "AWS::AccountId"
                                            },
                                            ":root"
                                        ]
                                    ]
                                }
                            },
                            "Action": [
                                "kms:*"
                            ],
                            "Resource": "*"
                        }
                    ]
                }
            }
        },
        "MountTargetResource1": {
            "Type": "AWS::EFS::MountTarget",
            "Properties": {
                "FileSystemId": {
                    "Ref": "FileSystemResource"
                },
                "SubnetId": {
                    "Ref": "MountTargetSubnetOne"
                },
                "SecurityGroups": [
                    {
                        "Fn::GetAtt": [
                            "MountTargetVPC",
                            "DefaultSecurityGroup"
                        ]
                    }
                ]
            }
        },
        "AccessPointResource": {
            "Type": "AWS::EFS::AccessPoint",
            "Properties": {
                "FileSystemId": {
                    "Ref": "FileSystemResource"
                },
                "PosixUser": {
                    "Uid": "13234",
                    "Gid": "1322",
                    "SecondaryGids": [
                        "1344",
                        "1452"
                    ]
                },
                "RootDirectory": {
                    "CreationInfo": {
                        "OwnerGid": "708798",
                        "OwnerUid": "7987987",
                        "Permissions": "0755"
                    },
                    "Path": "/testcfn/abc"
                }
            }
        }
    }
}

YAML


AWSTemplateFormatVersion: 2010-09-09
Resources:
  MountTargetVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 172.31.0.0/16
 
  MountTargetSubnetOne:
    Type: AWS::EC2::Subnet
    Properties:
      CidrBlock: 172.31.1.0/24
      VpcId: !Ref MountTargetVPC
      AvailabilityZone: "us-east-1a"
 
  FileSystemResource:
    Type: 'AWS::EFS::FileSystem'
    Properties:
      AvailabilityZoneName: us-east-1a
      BackupPolicy:
        Status: ENABLED
      Encrypted: true
      LifecyclePolicies:
        - TransitionToIA: AFTER_30_DAYS
        - TransitionToPrimaryStorageClass: AFTER_1_ACCESS
      FileSystemTags:
        - Key: Name
          Value: TestFileSystem
      FileSystemPolicy:
        Version: "2012-10-17"
        Statement:
          - Effect: "Allow"
            Action:
              - "elasticfilesystem:ClientMount"
            Principal:
                AWS: 'arn:aws:iam::111122223333:role/EfsReadOnly'
      KmsKeyId: !GetAtt 
        - key
        - Arn
  key:
    Type: AWS::KMS::Key
    Properties:
      KeyPolicy:
        Version: 2012-10-17
        Id: key-default-1
        Statement:
          - Sid: Allow administration of the key
            Effect: Allow
            Principal:
              AWS: !Join 
                - ''
                - - 'arn:aws:iam::'
                  - !Ref 'AWS::AccountId'
                  - ':root'
            Action:
              - 'kms:*'
            Resource: 
              - '*'

  MountTargetResource1:
    Type: AWS::EFS::MountTarget
    Properties:
      FileSystemId: !Ref FileSystemResource
      SubnetId: !Ref MountTargetSubnetOne
      SecurityGroups:
      - !GetAtt MountTargetVPC.DefaultSecurityGroup
 
  AccessPointResource:
    Type: 'AWS::EFS::AccessPoint'
    Properties:
      FileSystemId: !Ref FileSystemResource
      PosixUser:
        Uid: "13234"
        Gid: "1322"
        SecondaryGids:
          - "1344"
          - "1452"
      RootDirectory:
        CreationInfo:
          OwnerGid: "708798"
          OwnerUid: "7987987"
          Permissions: "0755"
        Path: "/testcfn/abc"