Amazon.EC2.Util.VPCUtilities.LaunchNATInstance C# (CSharp) Метод

        public static Instance LaunchNATInstance(IAmazonEC2 ec2Client, LaunchNATInstanceRequest request)
        {
            if (ec2Client == null)
                throw new ArgumentNullException("ec2Client");
            if (request == null)
                throw new ArgumentNullException("request");
            if (string.IsNullOrEmpty(request.SubnetId))
                throw new InvalidOperationException("request.SubnetId is null");
            if (string.IsNullOrEmpty(request.InstanceType))
                throw new InvalidOperationException("request.InstanceType is null");

            List<Filter> filters = new List<Filter>()
            {
                new Filter(){Name = "architecture", Values = new List<string>(){"x86_64"}},
                new Filter(){Name = "name", Values = new List<string>(){"ami-vpc-nat-*.x86_64-ebs"}}
            };
            DescribeImagesResponse imageResponse = ec2Client.DescribeImages(new DescribeImagesRequest() { Filters = filters });
            var image = FindNATImage(ec2Client);
            if (image == null)
            {
                throw new AmazonEC2Exception("No NAT image found in this region");
            }

            RunInstancesRequest runRequest = new RunInstancesRequest()
            {
                InstanceType = request.InstanceType,
                KeyName = request.KeyName,
                ImageId = image.ImageId,
                MinCount = 1,
                MaxCount = 1,
                SubnetId = request.SubnetId
            };
            RunInstancesResponse runResponse = ec2Client.RunInstances(runRequest);
            string instanceId = runResponse.Reservation.Instances[0].InstanceId;
            // Can't associated elastic IP address until the instance is available
            WaitForInstanceToStartUp(ec2Client, instanceId);

            ModifyInstanceAttributeRequest modifyRequest = new ModifyInstanceAttributeRequest()
            {
                InstanceId = instanceId,
                Attribute = "sourceDestCheck",
                Value = "false"
            };
            ec2Client.ModifyInstanceAttribute(modifyRequest);

            ec2Client.CreateTags(new CreateTagsRequest()
            {
                Resources = new List<string>() { instanceId },
                Tags = new List<Tag>() { new Tag() { Key = "Name", Value = "NAT" } }
            });

            var allocationId = ec2Client.AllocateAddress(new AllocateAddressRequest() { Domain = "vpc" }).AllocationId;
            ec2Client.AssociateAddress(new AssociateAddressRequest() { InstanceId = instanceId, AllocationId = allocationId });

            var instance = ec2Client.DescribeInstances(new DescribeInstancesRequest() { InstanceIds = new List<string>() { instanceId } }).Reservations[0].Instances[0];

            return instance;
        }