protected EC2SpotSlave newSpotSlave(SpotInstanceRequest sir, String name)
     throws FormException, IOException {
   return new EC2SpotSlave(
       name,
       sir.getSpotInstanceRequestId(),
       description,
       remoteFS,
       getNumExecutors(),
       mode,
       initScript,
       tmpDir,
       labels,
       remoteAdmin,
       jvmopts,
       idleTerminationMinutes,
       EC2Tag.fromAmazonTags(sir.getTags()),
       parent.name,
       usePrivateDnsName,
       getLaunchTimeout(),
       amiType);
 }
  /** Provision a new slave for an EC2 spot instance to call back to Jenkins */
  private EC2AbstractSlave provisionSpot(TaskListener listener)
      throws AmazonClientException, IOException {
    PrintStream logger = listener.getLogger();
    AmazonEC2 ec2 = getParent().connect();

    try {
      logger.println("Launching " + ami + " for template " + description);
      LOGGER.info("Launching " + ami + " for template " + description);

      KeyPair keyPair = getKeyPair(ec2);

      RequestSpotInstancesRequest spotRequest = new RequestSpotInstancesRequest();

      // Validate spot bid before making the request
      if (getSpotMaxBidPrice() == null) {
        // throw new FormException("Invalid Spot price specified: " +
        // getSpotMaxBidPrice(), "spotMaxBidPrice");
        throw new AmazonClientException("Invalid Spot price specified: " + getSpotMaxBidPrice());
      }

      spotRequest.setSpotPrice(getSpotMaxBidPrice());
      spotRequest.setInstanceCount(1);

      LaunchSpecification launchSpecification = new LaunchSpecification();
      InstanceNetworkInterfaceSpecification net = new InstanceNetworkInterfaceSpecification();

      launchSpecification.setImageId(ami);
      launchSpecification.setInstanceType(type);

      if (StringUtils.isNotBlank(getZone())) {
        SpotPlacement placement = new SpotPlacement(getZone());
        launchSpecification.setPlacement(placement);
      }

      if (StringUtils.isNotBlank(getSubnetId())) {
        if (getAssociatePublicIp()) {
          net.setSubnetId(getSubnetId());
        } else {
          launchSpecification.setSubnetId(getSubnetId());
        }

        /*
         * If we have a subnet ID then we can only use VPC security groups
         */
        if (!securityGroupSet.isEmpty()) {
          List<String> groupIds = getEc2SecurityGroups(ec2);
          if (!groupIds.isEmpty()) {
            if (getAssociatePublicIp()) {
              net.setGroups(groupIds);
            } else {
              ArrayList<GroupIdentifier> groups = new ArrayList<GroupIdentifier>();

              for (String group_id : groupIds) {
                GroupIdentifier group = new GroupIdentifier();
                group.setGroupId(group_id);
                groups.add(group);
              }
              if (!groups.isEmpty()) launchSpecification.setAllSecurityGroups(groups);
            }
          }
        }
      } else {
        /* No subnet: we can use standard security groups by name */
        if (!securityGroupSet.isEmpty()) {
          launchSpecification.setSecurityGroups(securityGroupSet);
        }
      }

      String userDataString = Base64.encodeBase64String(userData.getBytes(StandardCharsets.UTF_8));

      launchSpecification.setUserData(userDataString);
      launchSpecification.setKeyName(keyPair.getKeyName());
      launchSpecification.setInstanceType(type.toString());

      if (getAssociatePublicIp()) {
        net.setAssociatePublicIpAddress(true);
        net.setDeviceIndex(0);
        launchSpecification.withNetworkInterfaces(net);
      }

      boolean hasCustomTypeTag = false;
      HashSet<Tag> instTags = null;
      if (tags != null && !tags.isEmpty()) {
        instTags = new HashSet<Tag>();
        for (EC2Tag t : tags) {
          instTags.add(new Tag(t.getName(), t.getValue()));
          if (StringUtils.equals(t.getName(), EC2Tag.TAG_NAME_JENKINS_SLAVE_TYPE)) {
            hasCustomTypeTag = true;
          }
        }
      }
      if (!hasCustomTypeTag) {
        if (instTags != null)
          instTags.add(
              new Tag(
                  EC2Tag.TAG_NAME_JENKINS_SLAVE_TYPE,
                  EC2Cloud.getSlaveTypeTagValue(EC2Cloud.EC2_SLAVE_TYPE_SPOT, description)));
      }

      if (StringUtils.isNotBlank(getIamInstanceProfile())) {
        launchSpecification.setIamInstanceProfile(
            new IamInstanceProfileSpecification().withArn(getIamInstanceProfile()));
      }

      if (useEphemeralDevices) {
        setupEphemeralDeviceMapping(launchSpecification);
      } else {
        setupCustomDeviceMapping(launchSpecification);
      }

      spotRequest.setLaunchSpecification(launchSpecification);

      // Make the request for a new Spot instance
      RequestSpotInstancesResult reqResult = ec2.requestSpotInstances(spotRequest);

      List<SpotInstanceRequest> reqInstances = reqResult.getSpotInstanceRequests();
      if (reqInstances.isEmpty()) {
        throw new AmazonClientException("No spot instances found");
      }

      SpotInstanceRequest spotInstReq = reqInstances.get(0);
      if (spotInstReq == null) {
        throw new AmazonClientException("Spot instance request is null");
      }
      String slaveName = spotInstReq.getSpotInstanceRequestId();

      /* Now that we have our Spot request, we can set tags on it */
      if (instTags != null) {
        updateRemoteTags(
            ec2,
            instTags,
            "InvalidSpotInstanceRequestID.NotFound",
            spotInstReq.getSpotInstanceRequestId());

        // That was a remote request - we should also update our local
        // instance data.
        spotInstReq.setTags(instTags);
      }

      logger.println("Spot instance id in provision: " + spotInstReq.getSpotInstanceRequestId());
      LOGGER.info("Spot instance id in provision: " + spotInstReq.getSpotInstanceRequestId());

      return newSpotSlave(spotInstReq, slaveName);

    } catch (FormException e) {
      throw new AssertionError(); // we should have discovered all
      // configuration issues upfront
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }
  }