AWS::QLDB::Ledger - Amazon CloudFormation
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The AWS::QLDB::Ledger resource specifies a new Amazon Quantum Ledger Database (Amazon QLDB) ledger in your Amazon Web Services account. Amazon QLDB is a fully managed ledger database that provides a transparent, immutable, and cryptographically verifiable transaction log owned by a central trusted authority. You can use QLDB to track all application data changes, and maintain a complete and verifiable history of changes over time.

For more information, see CreateLedger in the Amazon QLDB API Reference.


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


{ "Type" : "AWS::QLDB::Ledger", "Properties" : { "DeletionProtection" : Boolean, "KmsKey" : String, "Name" : String, "PermissionsMode" : String, "Tags" : [ Tag, ... ] } }


Type: AWS::QLDB::Ledger Properties: DeletionProtection: Boolean KmsKey: String Name: String PermissionsMode: String Tags: - Tag



Specifies whether the ledger is protected from being deleted by any user. If not defined during ledger creation, this feature is enabled (true) by default.

If deletion protection is enabled, you must first disable it before you can delete the ledger. You can disable it by calling the UpdateLedger operation to set this parameter to false.

Required: No

Type: Boolean

Update requires: No interruption


The key in Amazon Key Management Service (Amazon KMS) to use for encryption of data at rest in the ledger. For more information, see Encryption at rest in the Amazon QLDB Developer Guide.

Use one of the following options to specify this parameter:

  • AWS_OWNED_KMS_KEY: Use an Amazon KMS key that is owned and managed by Amazon on your behalf.

  • Undefined: By default, use an Amazon owned KMS key.

  • A valid symmetric customer managed KMS key: Use the specified symmetric encryption KMS key in your account that you create, own, and manage.

    Amazon QLDB does not support asymmetric keys. For more information, see Using symmetric and asymmetric keys in the Amazon Key Management Service Developer Guide.

To specify a customer managed KMS key, you can use its key ID, Amazon Resource Name (ARN), alias name, or alias ARN. When using an alias name, prefix it with "alias/". To specify a key in a different Amazon Web Services account, you must use the key ARN or alias ARN.

For example:

  • Key ID: 1234abcd-12ab-34cd-56ef-1234567890ab

  • Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab

  • Alias name: alias/ExampleAlias

  • Alias ARN: arn:aws:kms:us-east-2:111122223333:alias/ExampleAlias

For more information, see Key identifiers (KeyId) in the Amazon Key Management Service Developer Guide.

Required: No

Type: String

Maximum: 1600

Update requires: No interruption


The name of the ledger that you want to create. The name must be unique among all of the ledgers in your Amazon Web Services account in the current Region.

Naming constraints for ledger names are defined in Quotas in Amazon QLDB in the Amazon QLDB Developer Guide.

Required: No

Type: String

Pattern: (?!^.*--)(?!^[0-9]+$)(?!^-)(?!.*-$)^[A-Za-z0-9-]+$

Minimum: 1

Maximum: 32

Update requires: Replacement


The permissions mode to assign to the ledger that you want to create. This parameter can have one of the following values:

  • ALLOW_ALL: A legacy permissions mode that enables access control with API-level granularity for ledgers.

    This mode allows users who have the SendCommand API permission for this ledger to run all PartiQL commands (hence, ALLOW_ALL) on any tables in the specified ledger. This mode disregards any table-level or command-level IAM permissions policies that you create for the ledger.

  • STANDARD: (Recommended) A permissions mode that enables access control with finer granularity for ledgers, tables, and PartiQL commands.

    By default, this mode denies all user requests to run any PartiQL commands on any tables in this ledger. To allow PartiQL commands to run, you must create IAM permissions policies for specific table resources and PartiQL actions, in addition to the SendCommand API permission for the ledger. For information, see Getting started with the standard permissions mode in the Amazon QLDB Developer Guide.


We strongly recommend using the STANDARD permissions mode to maximize the security of your ledger data.

Required: Yes

Type: String

Allowed values: ALLOW_ALL | STANDARD

Update requires: No interruption


An array of key-value pairs to apply to this resource.

For more information, see Tag.

Required: No

Type: Array of Tag

Update requires: No interruption

Return values


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

{ "Ref": "myQLDBLedger" }

For the resource with the logical ID myQLDBLedger, Ref returns the Amazon QLDB ledger name.

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



Amazon QLDB Ledger

The following example describes an Amazon QLDB ledger with a PermissionsMode of STANDARD and a specified customer managed KMS key for encryption at rest.


{ "AWSTemplateFormatVersion" : "2010-09-09", "Resources" : { "myQLDBLedger": { "Type": "AWS::QLDB::Ledger", "Properties": { "DeletionProtection": true, "KmsKey": "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab", "Name": "exampleLedger", "PermissionsMode": "STANDARD", "Tags": [ { "Key": "Domain", "Value": "Test" } ] } } } }


AWSTemplateFormatVersion: "2010-09-09" Resources: myQLDBLedger: Type: "AWS::QLDB::Ledger" Properties: DeletionProtection: true KmsKey: "arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab" Name: "exampleLedger" PermissionsMode: "STANDARD" Tags: - Key: Domain Value: Test

See also