Modify Amazon EC2 Dedicated Host tenancy and affinity for an Amazon EC2 instance

You can change the tenancy of an instance after you have launched it. You can also modify the affinity for your instance to target a specific host or allow it to launch on any available dedicated host with matching attributes in your account. To modify either instance tenancy or affinity, the instance must be in the stopped state.

The operating system details of your instance—and whether SQL Server is installed—affect what conversions are supported. For more information about the tenancy conversion paths available to your instance, see Tenancy conversion in the License Manager User Guide.

Note

For T3 instances, you must launch the instance on a Dedicated Host to use a tenancy of host. For T3 instances, you can't change the tenancy from host to dedicated or default. Attempting to make one of these unsupported tenancy changes results in an InvalidRequest error code.

You can modify an instance's tenancy and affinity using the following methods.

Console

To modify instance tenancy or affinity

1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

2. Choose Instances, and select the instance to modify.

3. Choose Instance state, Stop.

4. With the instance selected, choose Actions, Instance settings, Modify instance placement.

5. On the Modify instance placement page, configure the following:

   • Tenancy—Choose one of the following:

     • Run a dedicated hardware instance—Launches the instance as a Dedicated Instance. For more information, see Amazon EC2 Dedicated Instances.

     • Launch the instance on a Dedicated Host—Launches the instance onto a Dedicated Host with configurable affinity.

   • Affinity—Choose one of the following:

     • This instance can run on any one of my hosts—The instance launches onto any available Dedicated Host in your account that supports its instance type.

     • This instance can only run on the selected host—The instance is only able to run on the Dedicated Host selected for Target Host.

   • Target Host—Select the Dedicated Host that the instance must run on. If no target host is listed, you might not have available, compatible Dedicated Hosts in your account.

   For more information, see Amazon EC2 Dedicated Host auto-placement and host affinity.

6. Choose Save.

AWS CLI

To modify instance tenancy or affinity

Use the modify-instance-placement command. The following example changes the specified instance's affinity from default to host, and specifies the Dedicated Host that the instance has affinity with.

aws ec2 modify-instance-placement --instance-id i-1234567890abcdef0 --affinity host --tenancy host --host-id h-012a3456b7890cdef

PowerShell

To modify instance tenancy or affinity

Use the Edit-EC2InstancePlacement AWS Tools for Windows PowerShell command. The following example changes the specified instance's affinity from default to host, and specifies the Dedicated Host that the instance has affinity with.

PS C:\> Edit-EC2InstancePlacement -InstanceId i-1234567890abcdef0 -Affinity host -Tenancy host -HostId h-012a3456b7890cdef