Launch Amazon EC2 instances on an Amazon EC2 Dedicated Host - Amazon Elastic Compute Cloud
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Launch Amazon EC2 instances on an Amazon EC2 Dedicated Host

After you have allocated a Dedicated Host, you can launch instances onto it. You can't launch instances with host tenancy if you do not have active Dedicated Hosts with enough available capacity for the instance type that you are launching.

Tip

For Dedicated Hosts that support multiple instance sizes, we recommend that you launch the larger instance sizes first, and then fill the remaining instance capacity with the smaller instance sizes as needed.

Before you launch your instances, take note of the limitations. For more information, see Dedicated Hosts restrictions.

You can launch an instance onto a Dedicated Host using the following methods.

Console
To launch an instance onto a specific Dedicated Host from the Dedicated Hosts page

  1. Open the Amazon EC2 console at https://console.amazonaws.cn/ec2/.

  2. Choose Dedicated Hosts in the navigation pane.

  3. On the Dedicated Hosts page, select a host and choose Actions, Launch Instance(s) onto Host.

  4. Select an AMI from the list. SQL Server, SUSE, and RHEL AMIs provided by Amazon EC2 can't be used with Dedicated Hosts.

  5. On the Choose an Instance Type page, select the instance type to launch and then choose Next: Configure Instance Details.

    If the Dedicated Host supports a single instance type only, the supported instance type is selected by default and can't be changed.

    If the Dedicated Host supports multiple instance types, you must select an instance type within the supported instance family based on the available instance capacity of the Dedicated Host. We recommend that you launch the larger instance sizes first, and then fill the remaining instance capacity with the smaller instance sizes as needed.

  6. On the Configure Instance Details page, configure the instance settings to suit your needs, and then for Affinity, choose one of the following options:

    • Off—The instance launches onto the specified host, but it is not guaranteed to restart on the same Dedicated Host if stopped.

    • Host—If stopped, the instance always restarts on this specific host.

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

    The Tenancy and Host options are pre-configured based on the host that you selected.

  7. Choose Review and Launch.

  8. On the Review Instance Launch page, choose Launch.

  9. When prompted, select an existing key pair or create a new one, and then choose Launch Instances.

To launch an instance onto a Dedicated Host using the Launch Instance wizard

  1. Open the Amazon EC2 console at https://console.amazonaws.cn/ec2/.

  2. In the navigation pane, choose Instances, Launch Instance.

  3. Select an AMI from the list. SQL Server, SUSE, and RHEL AMIs provided by Amazon EC2 can't be used with Dedicated Hosts.

  4. Select the type of instance to launch and choose Next: Configure Instance Details.

  5. On the Configure Instance Details page, configure the instance settings to suit your needs, and then configure the following settings, which are specific to a Dedicated Host:

    • Tenancy—Choose Dedicated Host - Launch this instance on a Dedicated Host.

    • Host—Choose either Use auto-placement to launch the instance on any Dedicated Host that has auto-placement enabled, or select a specific Dedicated Host in the list. The list displays only Dedicated Hosts that support the selected instance type.

    • Affinity—Choose one of the following options:

      • Off—The instance launches onto the specified host, but it is not guaranteed to restart on it if stopped.

      • Host—If stopped, the instance always restarts on the specified host.

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

    If you are unable to see these settings, check that you have selected a VPC in the Network menu.

  6. Choose Review and Launch.

  7. On the Review Instance Launch page, choose Launch.

  8. When prompted, select an existing key pair or create a new one, and then choose Launch Instances.

Amazon CLI
To launch an instance onto a Dedicated Host

Use the run-instances Amazon CLI command and specify the instance affinity, tenancy, and host in the Placement request parameter.

PowerShell
To launch an instance onto a Dedicated Host

Use the New-EC2Instance Amazon Tools for Windows PowerShell command and specify the instance affinity, tenancy, and host in the Placement request parameter.