Use GetRole with an Amazon SDK or CLI

    /// <summary>
    /// Get information about an IAM role.
    /// </summary>
    /// <param name="roleName">The name of the IAM role to retrieve information
    /// for.</param>
    /// <returns>The IAM role that was retrieved.</returns>
    public async Task<Role> GetRoleAsync(string roleName)
    {
        var response = await _IAMService.GetRoleAsync(new GetRoleRequest
        {
            RoleName = roleName,
        });

        return response.Role;
    }

To get information about an IAM role

The following get-role command gets information about the role named Test-Role.

aws iam get-role \
    --role-name Test-Role

Output:

{
    "Role": {
        "Description": "Test Role",
        "AssumeRolePolicyDocument":"<URL-encoded-JSON>",
        "MaxSessionDuration": 3600,
        "RoleId": "AROA1234567890EXAMPLE",
        "CreateDate": "2019-11-13T16:45:56Z",
        "RoleName": "Test-Role",
        "Path": "/",
        "RoleLastUsed": {
            "Region": "us-east-1",
            "LastUsedDate": "2019-11-13T17:14:00Z"
        },
        "Arn": "arn:aws:iam::123456789012:role/Test-Role"
    }
}

The command displays the trust policy attached to the role. To list the permissions policies attached to a role, use the list-role-policies command.

For more information, see Creating IAM roles in the Amazon IAM User Guide.

// RoleWrapper encapsulates AWS Identity and Access Management (IAM) role actions
// used in the examples.
// It contains an IAM service client that is used to perform role actions.
type RoleWrapper struct {
	IamClient *iam.Client
}



// GetRole gets data about a role.
func (wrapper RoleWrapper) GetRole(roleName string) (*types.Role, error) {
	var role *types.Role
	result, err := wrapper.IamClient.GetRole(context.TODO(),
		&iam.GetRoleInput{RoleName: aws.String(roleName)})
	if err != nil {
		log.Printf("Couldn't get role %v. Here's why: %v\n", roleName, err)
	} else {
		role = result.Role
	}
	return role, err
}

Get the role.

import { GetRoleCommand, IAMClient } from "@aws-sdk/client-iam";

const client = new IAMClient({});

/**
 *
 * @param {string} roleName
 */
export const getRole = (roleName) => {
  const command = new GetRoleCommand({
    RoleName: roleName,
  });

  return client.send(command);
};

$uuid = uniqid();
$service = new IAMService();

    public function getRole($roleName)
    {
        return $this->customWaiter(function () use ($roleName) {
            return $this->iamClient->getRole(['RoleName' => $roleName]);
        });
    }

Example 1: This example returns the details of the lamda_exec_role. It includes the trust policy document that specifies who can assume this role. The policy document is URL encoded and can be decoded using the .NET UrlDecode method. In this example, the original policy had all white space removed before it was uploaded to the policy. To see the permissions policy documents that determine what someone who assumes the role can do, use the Get-IAMRolePolicy for inline policies, and Get-IAMPolicyVersion for attached managed policies.

$results = Get-IamRole -RoleName lambda_exec_role
$results | Format-List

Output:

Arn                      : arn:aws:iam::123456789012:role/lambda_exec_role
AssumeRolePolicyDocument : %7B%22Version%22%3A%222012-10-17%22%2C%22Statement%22%3A%5B%7B%22Sid%22
                           %3A%22%22%2C%22Effect%22%3A%22Allow%22%2C%22Principal%22%3A%7B%22Service
                           %22%3A%22lambda.amazonaws.com%22%7D%2C%22Action%22%3A%22sts%3AAssumeRole
                           %22%7D%5D%7D
CreateDate               : 4/2/2015 9:16:11 AM
Path                     : /
RoleId                   : 2YBIKAIBHNKB4EXAMPLE1
RoleName                 : lambda_exec_role

$policy = [System.Web.HttpUtility]::UrlDecode($results.AssumeRolePolicyDocument)
$policy

Output:

{"Version":"2012-10-17","Statement":[{"Sid":"","Effect":"Allow","Principal":{"Service":"lambda.amazonaws.com"},"Action":"sts:AssumeRole"}]}

def get_role(role_name):
    """
    Gets a role by name.

    :param role_name: The name of the role to retrieve.
    :return: The specified role.
    """
    try:
        role = iam.Role(role_name)
        role.load()  # calls GetRole to load attributes
        logger.info("Got role with arn %s.", role.arn)
    except ClientError:
        logger.exception("Couldn't get role named %s.", role_name)
        raise
    else:
        return role

  # Gets data about a role.
  #
  # @param name [String] The name of the role to look up.
  # @return [Aws::IAM::Role] The retrieved role.
  def get_role(name)
    role = @iam_client.get_role({
                                  role_name: name,
                                }).role
    puts("Got data for role '#{role.role_name}'. Its ARN is '#{role.arn}'.")
  rescue Aws::Errors::ServiceError => e
    puts("Couldn't get data for role '#{name}' Here's why:")
    puts("\t#{e.code}: #{e.message}")
    raise
  else
    role
  end

pub async fn get_role(
    client: &iamClient,
    role_name: String,
) -> Result<GetRoleOutput, SdkError<GetRoleError>> {
    let response = client.get_role().role_name(role_name).send().await?;
    Ok(response)
}

    public func getRole(name: String) async throws -> IAMClientTypes.Role {
        let input = GetRoleInput(
            roleName: name
        )
        do {
            let output = try await client.getRole(input: input)
            guard let role = output.role else {
                throw ServiceHandlerError.noSuchRole
            }
            return role
        } catch {
            throw error
        }
    }