使用 C# 获取 ec2-instance 标签

我不是开发人员，所以也许答案是有不同的解决方案，但我无法真正从 python 或其他东西翻译它。

我尝试使用 AWS .NET SDK 查找实例，然后获取实例的标签。我已经能够确定实例是否已启动并正在运行。我还了解了如何创建和删除标签（不在下面的代码示例中）。但我没有看到一种简单的方法来实际检查标签是否存在并获取标签的值（如果存在）。

抱歉，如果我错过了显而易见的事情，但这对我来说是全新的。这是我用来检查实例是否正在运行的代码示例。

            instanceID = "i-myInstanceID";
            do {
                var myrequest = new DescribeInstanceStatusRequest();
                DescribeInstanceStatusResponse myresponse = ec2.DescribeInstanceStatus(myrequest);
                int isCount = myresponse.DescribeInstanceStatusResult.InstanceStatuses.Count;
                for (int isc=0; isc < isCount; isc++) {
                    InstanceStatus instanceStatus = myresponse.DescribeInstanceStatusResult.InstanceStatuses[isc];
                    if (instanceStatus.InstanceId.Contains(instanceID)) {
                        Console.WriteLine("It looks like instance "+instanceID+" is running.");
                        idIdx = isc;
                        foundID = true;
                        break;
                    }
                }
                if ((foundID==false) && (secondCounter==1)) {
                    Console.Write("Looking for instance "+instanceID);
                } else {
                    Console.Write(".");
                }
                Thread.Sleep(1000);
                secondCounter++;
                if (secondCounter > 5) {
                    break;
                }
            } while (foundID == false) ;

首先发送一个DescribeInstancesRequest来获取实例列表：

    public DescribeInstancesResult GetInstances(Ec2Key ec2Key)
    {
        _logger.Debug("GetInstances Start.");

        AmazonEC2 ec2 = CreateAmazonEc2Client(ec2Key);

        var ec2Request = new DescribeInstancesRequest();

        DescribeInstancesResponse describeInstancesResponse = ec2.DescribeInstances(ec2Request);

        DescribeInstancesResult result = describeInstancesResponse.DescribeInstancesResult;

        _logger.Debug("GetInstances End.");

        return result;
    }

然后循环遍历实例，直到找到所需的实例，然后使用 Tag.GetTagValueByKey 方法：

        // This just calls the above code
        DescribeInstancesResult ec2Instances = _ec2ResourceAccess.GetInstances(ec2Key);

        var returnInstances = new List<Ec2UtilityInstance>();
        foreach (var reservation in ec2Instances.Reservation)
        {
            foreach (var runningInstance in reservation.RunningInstance)
            {
                var returnInstance = new Ec2UtilityInstance();

                returnInstance.InstanceId = runningInstance.InstanceId;
                returnInstance.InstanceName = runningInstance.Tag.GetTagValueByKey("Name");
                returnInstance.Status = (Ec2UtilityInstanceStatus)Enum.Parse(typeof(Ec2UtilityInstanceStatus), runningInstance.InstanceState.Name, true);
                returnInstance.DefaultIp = runningInstance.Tag.GetTagValueByKey("DefaultIp");
                returnInstance.InstanceType = runningInstance.InstanceType;
                returnInstance.ImageId = runningInstance.ImageId;

                returnInstances.Add(returnInstance);   
            }
        }

这是完整来源的链接：

https://github.com/escherrer/EC2Utilities https://github.com/escherrer/EC2Utilities

普通\管理器

and

公共\资源访问