RegisterInstance - OpsWorks


Registers instances that were created outside of AWS OpsWorks Stacks with a specified stack.


We do not recommend using this action to register instances. The complete registration operation includes two tasks: installing the AWS OpsWorks Stacks agent on the instance, and registering the instance with the stack. RegisterInstance handles only the second step. You should instead use the AWS CLI register command, which performs the entire registration operation. For more information, see Registering an Instance with an AWS OpsWorks Stacks Stack.

Registered instances have the same requirements as instances that are created by using the CreateInstance API. For example, registered instances must be running a supported Linux-based operating system, and they must have a supported instance type. For more information about requirements for instances that you want to register, see Preparing the Instance.

Required Permissions: To use this action, an IAM user must have a Manage permissions level for the stack or an attached policy that explicitly grants permissions. For more information on user permissions, see Managing User Permissions.

Request Syntax

{ "Hostname": "string", "InstanceIdentity": { "Document": "string", "Signature": "string" }, "PrivateIp": "string", "PublicIp": "string", "RsaPublicKey": "string", "RsaPublicKeyFingerprint": "string", "StackId": "string" }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.


The instance's host name. The following are character limits for instance host names.

  • Linux-based instances: 63 characters

  • Windows-based instances: 15 characters

Type: String

Required: No


An InstanceIdentity object that contains the instance's identity.

Type: InstanceIdentity object

Required: No


The instance's private IP address.

Type: String

Required: No


The instance's public IP address.

Type: String

Required: No


The instances public RSA key. This key is used to encrypt communication between the instance and the service.

Type: String

Required: No


The instances public RSA key fingerprint.

Type: String

Required: No


The ID of the stack that the instance is to be registered with.

Type: String

Required: Yes

Response Syntax

{ "InstanceId": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


The registered instance's AWS OpsWorks Stacks ID.

Type: String


For information about the errors that are common to all actions, see Common Errors.


Indicates that a resource was not found.

HTTP Status Code: 400


Indicates that a request was not valid.

HTTP Status Code: 400

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: