# AddRoleToInstanceProfile
Adds the specified IAM role to the specified instance profile. An instance profile can contain only one role, and this quota cannot be increased. You can remove the existing role and then add a different role to an instance profile. You must then wait for the change to appear across all of AWS because of [eventual consistency](https://en.wikipedia.org/wiki/Eventual_consistency). To force the change, you must [disassociate the instance profile](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DisassociateIamInstanceProfile.html) and then [associate the instance profile](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_AssociateIamInstanceProfile.html), or you can stop your instance and then restart it.
**Note**
The caller of this operation must be granted the `PassRole` permission on the IAM role by a permissions policy.
**Important**
When using the [iam:AssociatedResourceArn](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_iam-condition-keys.html#available-keys-for-iam) condition in a policy to restrict the [PassRole](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_use_passrole.html) IAM action, special considerations apply if the policy is intended to define access for the `AddRoleToInstanceProfile` action. In this case, you cannot specify a Region or instance ID in the EC2 instance ARN. The ARN value must be `arn:aws:ec2:*:CallerAccountId:instance/*`. Using any other ARN value may lead to unexpected evaluation results.
For more information about roles, see [IAM roles](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles.html) in the *IAM User Guide*. For more information about instance profiles, see [Using instance profiles](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_use_switch-role-ec2_instance-profiles.html) in the *IAM User Guide*.
## Request Parameters
For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).
** InstanceProfileName **
The name of the instance profile to update.
This parameter allows (through its [regex pattern](http://wikipedia.org/wiki/regex)) a string of characters consisting of upper and lowercase alphanumeric characters with no spaces. You can also include any of the following characters: \$1\$1=,.@-
Type: String
Length Constraints: Minimum length of 1. Maximum length of 128.
Pattern: `[\w+=,.@-]+`
Required: Yes
** RoleName **
The name of the role to add.
This parameter allows (through its [regex pattern](http://wikipedia.org/wiki/regex)) a string of characters consisting of upper and lowercase alphanumeric characters with no spaces. You can also include any of the following characters: \$1\$1=,.@-
Type: String
Length Constraints: Minimum length of 1. Maximum length of 64.
Pattern: `[\w+=,.@-]+`
Required: Yes
## Errors
For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).
** EntityAlreadyExists **
The request was rejected because it attempted to create a resource that already exists.
HTTP Status Code: 409
** LimitExceeded **
The request was rejected because it attempted to create resources beyond the current AWS account limits. The error message describes the limit exceeded.
HTTP Status Code: 409
** NoSuchEntity **
The request was rejected because it referenced a resource entity that does not exist. The error message describes the resource.
HTTP Status Code: 404
** ServiceFailure **
The request processing has failed because of an unknown error, exception or failure.
HTTP Status Code: 500
** UnmodifiableEntity **
The request was rejected because service-linked roles are protected AWS resources. Only the service that depends on the service-linked role can modify or delete the role on your behalf. The error message includes the name of the service that depends on this service-linked role. You must request the change through that service.
HTTP Status Code: 400
## Examples
### Example
This example illustrates one usage of AddRoleToInstanceProfile.
#### Sample Request
```
https://iam.amazonaws.com/?Action=AddRoleToInstanceProfile
&InstanceProfileName=Webserver
&RoleName=S3Access
&Version=2010-05-08
&AUTHPARAMS
```
#### Sample Response
```
12657608-99f2-11e1-a4c3-27EXAMPLE804
```
## See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
+ [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/iam-2010-05-08/AddRoleToInstanceProfile)
+ [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iam-2010-05-08/AddRoleToInstanceProfile)