Use ModifyHosts with an Amazon SDK or CLI

Example 1: To enable auto-placement for a Dedicated Host

The following modify-hosts example enables auto-placement for a Dedicated Host so that it accepts any untargeted instance launches that match its instance type configuration.

aws ec2 modify-hosts \
    --host-id h-06c2f189b4EXAMPLE \
    --auto-placement on

Output:

{
    "Successful": [
        "h-06c2f189b4EXAMPLE"
    ],
    "Unsuccessful": []
}

Example 2: To enable host recovery for a Dedicated Host

The following modify-hosts example enables host recovery for the specified Dedicated Host.

aws ec2 modify-hosts \
    --host-id h-06c2f189b4EXAMPLE \
    --host-recovery on

Output:

{
    "Successful": [
        "h-06c2f189b4EXAMPLE"
    ],
    "Unsuccessful": []
}

For more information, see Modifying Dedicated Host Auto-Placement in the Amazon Elastic Compute Cloud User Guide for Linux Instances.

Example 1: This example modifies the AutoPlacement settings to off for the dedicated host h-01e23f4cd567890f3

Edit-EC2Host -HostId h-03e09f8cd681609f3 -AutoPlacement off

Output:

Successful            Unsuccessful
----------            ------------
{h-01e23f4cd567890f3} {}