Using service-linked roles for Application Migration Service - Application Migration Service

Using service-linked roles for Application Migration Service

Application Migration Service uses AWS Identity and Access Management (IAM) service-linked roles. A service-linked role is a unique type of IAM role that is linked directly to Application Migration Service. Service-linked roles are predefined by Application Migration Service and include all the permissions that the service requires to call other AWS services on your behalf.

A service-linked role makes setting up Application Migration Service easier because you don’t have to manually add the necessary permissions. Application Migration Service defines the permissions of its service-linked roles, and unless defined otherwise, only Application Migration Service can assume its roles. The defined permissions include the trust policy and the permissions policy, and that permissions policy cannot be attached to any other IAM entity.

You can delete a service-linked role only after first deleting their related resources. This protects your Application Migration Service resources because you can't inadvertently remove permission to access the resources.

For information about other services that support service-linked roles, see AWS Services That Work with IAM and look for the services that have Yes in the Service-Linked Role column. Choose a Yes with a link to view the service-linked role documentation for that service.

Service-linked role permissions for Application Migration Service

Application Migration Service uses the service-linked role named AWSServiceRoleForApplicationMigrationService. This is a managed IAM policy with scoped permissions that MGN needs to run in your account.

The AWSServiceRoleForApplicationMigrationService service-linked role trusts the following services to assume the role:

  • mgn.amazonaws.com

The role permissions policy allows Application Migration Service to complete the following actions on the specified resources.

{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": "mgn:ListTagsForResource", "Resource": "*" }, { "Effect": "Allow", "Action": "kms:ListRetirableGrants", "Resource": "*" }, { "Effect": "Allow", "Action": [ "mgh:AssociateCreatedArtifact", "mgh:CreateProgressUpdateStream", "mgh:DisassociateCreatedArtifact", "mgh:GetHomeRegion", "mgh:ImportMigrationTask", "mgh:NotifyMigrationTaskState", "mgh:PutResourceAttributes" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "ec2:DescribeAccountAttributes", "ec2:DescribeAvailabilityZones", "ec2:DescribeImages", "ec2:DescribeInstances", "ec2:DescribeInstanceTypes", "ec2:DescribeInstanceAttribute", "ec2:DescribeInstanceStatus", "ec2:DescribeLaunchTemplateVersions", "ec2:DescribeLaunchTemplates", "ec2:DescribeSecurityGroups", "ec2:DescribeSnapshots", "ec2:DescribeSubnets", "ec2:DescribeVolumes", "ec2:GetEbsDefaultKmsKeyId", "ec2:GetEbsEncryptionByDefault" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "ec2:RegisterImage", "ec2:DeregisterImage" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "ec2:DeleteSnapshot" ], "Resource": "arn:aws:ec2:*:*:snapshot/*", "Condition": { "StringLike": { "aws:ResourceTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:CreateLaunchTemplateVersion", "ec2:ModifyLaunchTemplate", "ec2:DeleteLaunchTemplate", "ec2:DeleteLaunchTemplateVersions" ], "Resource": "arn:aws:ec2:*:*:launch-template/*", "Condition": { "StringLike": { "aws:ResourceTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:DeleteVolume" ], "Resource": "arn:aws:ec2:*:*:volume/*", "Condition": { "StringLike": { "aws:ResourceTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:StartInstances", "ec2:StopInstances", "ec2:TerminateInstances", "ec2:ModifyInstanceAttribute", "ec2:GetConsoleOutput", "ec2:GetConsoleScreenshot" ], "Resource": "arn:aws:ec2:*:*:instance/*", "Condition": { "StringLike": { "aws:ResourceTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:RevokeSecurityGroupEgress", "ec2:AuthorizeSecurityGroupIngress", "ec2:AuthorizeSecurityGroupEgress" ], "Resource": "arn:aws:ec2:*:*:security-group/*", "Condition": { "StringLike": { "aws:ResourceTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:CreateVolume" ], "Resource": "arn:aws:ec2:*:*:volume/*", "Condition": { "StringLike": { "aws:RequestTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:CreateSecurityGroup" ], "Resource": "arn:aws:ec2:*:*:security-group/*", "Condition": { "StringLike": { "aws:RequestTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:CreateSecurityGroup" ], "Resource": "arn:aws:ec2:*:*:vpc/*" }, { "Effect": "Allow", "Action": [ "ec2:CreateLaunchTemplate" ], "Resource": "arn:aws:ec2:*:*:launch-template/*", "Condition": { "StringLike": { "aws:RequestTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:CreateSnapshot" ], "Resource": "arn:aws:ec2:*:*:volume/*", "Condition": { "StringLike": { "ec2:ResourceTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:CreateSnapshot" ], "Resource": "arn:aws:ec2:*:*:snapshot/*", "Condition": { "StringLike": { "aws:RequestTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:DetachVolume", "ec2:AttachVolume" ], "Resource": "arn:aws:ec2:*:*:instance/*", "Condition": { "StringLike": { "ec2:ResourceTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:AttachVolume" ], "Resource": "arn:aws:ec2:*:*:volume/*", "Condition": { "StringLike": { "ec2:ResourceTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:DetachVolume" ], "Resource": "arn:aws:ec2:*:*:volume/*" }, { "Effect": "Allow", "Action": [ "ec2:RunInstances" ], "Resource": "arn:aws:ec2:*:*:instance/*", "Condition": { "StringLike": { "aws:RequestTag/AWSApplicationMigrationServiceManaged": "*" } } }, { "Effect": "Allow", "Action": [ "ec2:RunInstances" ], "NotResource": "arn:aws:ec2:*:*:instance/*" }, { "Effect": "Allow", "Action": "iam:PassRole", "Resource": [ "arn:aws:iam::*:role/service-role/AWSApplicationMigrationReplicationServerRole", "arn:aws:iam::*:role/service-role/AWSApplicationMigrationConversionServerRole" ], "Condition": { "StringEquals": { "iam:PassedToService": "ec2.amazonaws.com" }, "StringLike": { "iam:AssociatedResourceARN": "arn:aws:ec2:*:*:instance/*" } } }, { "Effect": "Allow", "Action": "ec2:CreateTags", "Resource": [ "arn:aws:ec2:*:*:launch-template/*", "arn:aws:ec2:*:*:security-group/*", "arn:aws:ec2:*:*:volume/*", "arn:aws:ec2:*:*:snapshot/*", "arn:aws:ec2:*:*:instance/*" ], "Condition": { "StringEquals": { "ec2:CreateAction": [ "CreateLaunchTemplate", "CreateSecurityGroup", "CreateVolume", "CreateSnapshot", "RunInstances" ] } } } ] }

You must configure permissions to allow an IAM entity (such as a user, group, or role) to create, edit, or delete a service-linked role. For more information, see Service-Linked Role Permissions in the IAM User Guide.

Creating a service-linked role for Application Migration Service

You don't need to manually create a service-linked role. When you configure the Replication Configuration Template for Application Migration Service, a service-linked role is automatically created. MGN automatically creates the IAM service-linked role, which you can see in the IAM console. You don't need to manually create or configure this role.

If you delete this service-linked role, and then need to create it again, you can use the same process to recreate the role in your account. When you create the first new replication configuration template in MGN, it creates the service-linked role for you again.

In the AWS CLI or the AWS API, create a service-linked role with the Application Migration Service service name. For more information, see Creating a Service-Linked Role in the IAM User Guide. If you delete this service-linked role, you can use this same process to create the role again.

Editing a service-linked role for Application Migration Service

Application Migration Service does not allow you to edit the AWSServiceRoleForApplicationMigrationService service-linked role. After you create a service-linked role, you cannot change the name of the role because various entities might reference the role. However, you can edit the description of the role using IAM. For more information, see Editing a Service-Linked Role in the IAM User Guide.

Deleting a service-linked role for Application Migration Service

If you no longer need to use a feature or service that requires a service-linked role, we recommend that you delete that role. That way you don’t have an unused entity that is not actively monitored or maintained. However, you must clean up the resources for your service-linked role before you can manually delete it.

Note

If Application Migration Service is using the role when you try to delete the resources, the deletion might fail. If that happens, wait for a few minutes and try the operation again.

To clean up Application Migration Service resources used by AWSServiceRoleforApplicationMigrationService

Resources can be cleaned up without stopping any Application Migration Service services. Cleaning up Application Migration Service resources will cause Application Migration Service to stop working. For more information, see Cleaning up a Service-Linked Role in the IAM User Guide.

To manually delete the service-linked role using IAM

Use the IAM console, the AWS CLI, or the AWS API to delete the AWSServiceRoleForApplicationMigrationService service-linked role. For more information, see Deleting a Service-Linked Role in the IAM User Guide.

Supported Regions for Application Migration Service service-linked roles

Application Migration Service supports using service-linked roles in all of the AWS Regions where the service is available.

Application Migration Service does not support using service-linked roles in every Region where the service is available. You can use the AWSServiceRoleForApplicationMigrationService role in the following Regions.

Region name Region identity Support in Application Migration Service
US East (N. Virginia) us-east-1 Yes
US East (Ohio) us-east-2 Yes
US West (Oregon) us-west-2 Yes
Asia Pacific (Tokyo) ap-northeast-1 Yes
Asia Pacific (Singapore) ap-southeast-1 Yes
Asia Pacific (Sydney) ap-southeast-2 Yes
Europe (Frankfurt) eu-central-1 Yes
Europe (Stockholm) eu-north-1 Yes
Europe (Ireland) eu-west-1 Yes
Asia Pacific (Osaka) ap-northeast-3 Yes
US West (N. California) us-west-1 Yes
Canada (Central) ca-central-1 Yes
South America (São Paulo) sa-east-1 Yes