// no particular availability zone
String availabilityZone = null;
String bootscript = Joiner.on("\n").join(
provisioningDetails.getBootScript());
Instance startedInstance = new CreateInstance(awsCredentials(),
region(), availabilityZone,
provisioningDetails.getSecurityGroups(),
provisioningDetails.getKeyPair(),
provisioningDetails.getSize(), provisioningDetails.getImage(),
bootscript).call();