imageId

The ID of the AMI. Alternatively, you can specify a Systems Manager parameter, which will resolve to an AMI ID on launch.

Valid formats:

• ami-17characters00000

• resolve:ssm:parameter-name

• resolve:ssm:parameter-name:version-number

• resolve:ssm:parameter-name:label

• resolve:ssm:public-parameter

Currently, EC2 Fleet and Spot Fleet do not support specifying a Systems Manager parameter. If the launch template will be used by an EC2 Fleet or Spot Fleet, you must specify the AMI ID.

For more information, see Use a Systems Manager parameter instead of an AMI ID in the Amazon Elastic Compute Cloud User Guide.