go-lang 2

eri := ec2.RunInstancesInput{
  DisableApiTermination: aws.Bool(false),
  DryRun:                aws.Bool(dryRun), //Set to true if you just want to test things out
  IamInstanceProfile: &ec2.IamInstanceProfileSpecification{
     Name: aws.String("YOUR-IAM-PROFILE"),
  },
  ImageId: aws.String("YOUR-AMI-WITH-DOCKER-EXPOSED"),
  //The following sets the RunInstance request to use a spot instances
  InstanceMarketOptions: &ec2.InstanceMarketOptionsRequest{
     MarketType: aws.String("spot"),
     SpotOptions: &ec2.SpotMarketOptions{
        BlockDurationMinutes: aws.Int64(60), //Single hour
        //MaxPrice:                     nil, //This can be set if required
        SpotInstanceType: aws.String("one-time"),
     },
  },
  InstanceType: aws.String("MACHINE-TYPE"), //i.e. c5a.12xlarge
  KeyName: aws.String("SSH-KEYNAME-OR-NIL-STRING"),
  MaxCount: aws.Int64(1), 
  MinCount: aws.Int64(1),
//The following describe the instance networking details
  NetworkInterfaces: []*ec2.InstanceNetworkInterfaceSpecification{
     {
        AssociatePublicIpAddress: aws.Bool(true),
        DeleteOnTermination:      aws.Bool(true),
        DeviceIndex:              aws.Int64(0),
        Groups:                   []*string{aws.String("YOUR-SG-FOR-THE-INSTANCE")},
        InterfaceType:            aws.String("interface"),
        SubnetId:                 aws.String("THE-SUBNET"),
     },
  },
//The following is extremely helpful for reporting
  TagSpecifications: []*ec2.TagSpecification{{
     ResourceType: aws.String("instance"),
     Tags: []*ec2.Tag{{
        Key:   aws.String("environment"),
        Value: aws.String("dev"),
     },
  }},
//optionally, if you need some boiler plate running on the instance run -
  //UserData:                          aws.String("sudo apt install vim")
}