/**
* Makes the payload for creating an instance.
*
* @param natIP external IP address
* @param instanceName the name of the instance.
* @return the payload for the POST request to create a new instance.
*/
public Instance createPayload_instance(
String instanceName, String bootDiskName, String machineType, String natIP)
throws IOException {
GoogleUrl googleUrl = new GoogleUrl(GOOGLE_PROJECT_NAME, ZONE);
JsonObject json = new JsonObject();
json.addProperty("kind", "compute#instance");
json.addProperty("name", instanceName);
json.addProperty("machineType", googleUrl.getMachineTypeUrl(machineType));
JsonObject disksElem = new JsonObject();
disksElem.addProperty("kind", "compute#attachedDisk");
disksElem.addProperty("boot", true);
disksElem.addProperty("type", "PERSISTENT");
disksElem.addProperty("mode", "READ_WRITE");
disksElem.addProperty("deviceName", bootDiskName);
disksElem.addProperty("zone", googleUrl.getUrlPrefixWithProjectAndZone());
disksElem.addProperty("source", googleUrl.getSource(bootDiskName));
JsonArray jsonAr = new JsonArray();
jsonAr.add(disksElem);
json.add("disks", jsonAr);
JsonObject networkInterfacesObj = new JsonObject();
networkInterfacesObj.addProperty("kind", "compute#instanceNetworkInterface");
networkInterfacesObj.addProperty("network", googleUrl.getDefaultNetwork());
JsonObject accessConfigsObj = new JsonObject();
accessConfigsObj.addProperty("name", "External NAT");
accessConfigsObj.addProperty("type", "ONE_TO_ONE_NAT");
if (natIP != null) {
accessConfigsObj.addProperty("natIP", natIP);
}
JsonArray accessConfigsAr = new JsonArray();
accessConfigsAr.add(accessConfigsObj);
networkInterfacesObj.add("accessConfigs", accessConfigsAr);
JsonArray networkInterfacesAr = new JsonArray();
networkInterfacesAr.add(networkInterfacesObj);
json.add("networkInterfaces", networkInterfacesAr);
JsonObject serviceAccountsObj = new JsonObject();
serviceAccountsObj.addProperty("kind", "compute#serviceAccount");
serviceAccountsObj.addProperty("email", "default");
JsonArray scopesAr = new JsonArray();
scopesAr.add(new JsonPrimitive("https://www.googleapis.com/auth/userinfo.email"));
scopesAr.add(new JsonPrimitive("https://www.googleapis.com/auth/compute"));
scopesAr.add(new JsonPrimitive("https://www.googleapis.com/auth/devstorage.full_control"));
serviceAccountsObj.add("scopes", scopesAr);
JsonArray serviceAccountsAr = new JsonArray();
serviceAccountsAr.add(serviceAccountsObj);
json.add("serviceAccounts", serviceAccountsAr);
JsonObject metadataObj = new JsonObject();
JsonArray mdItemsAr = new JsonArray();
JsonObject mdItemsObj = new JsonObject();
mdItemsObj.addProperty("key", "startup-script-url");
mdItemsObj.addProperty("value", "");
mdItemsAr.add(mdItemsObj);
metadataObj.add("items", mdItemsAr);
json.add("metadata", metadataObj);
String payload = json.toString();
JsonFactory factory = JacksonFactory.getDefaultInstance();
Instance instance = factory.fromString(payload, Instance.class);
return instance;
}