List All EC2 Instances

Been playing around a lot with the AWS API. Going to post a few handy snippets every once in a while.

Typically, you start EC2 instances by ID. In this case, we’re doing it by tags (e.g. the name of the instance).

namespace EC2_Instance
{
  class Program
  {
    public static void StartInstance(AmazonEC2Client c, string InstanceID)
    {
      StartInstancesRequest r = new StartInstancesRequest();
      r.InstanceId.Add(InstanceID);
      c.StartInstances(r);
    }

    public static void StopInstance(AmazonEC2Client c, string InstanceID)
    {
      StopInstancesRequest r = new StopInstancesRequest();
      r.InstanceId.Add(InstanceID);
      c.StopInstances(r);
    }


    public static void Main(string[] args)
    {    

      AmazonEC2Client ec2Client = new AmazonEC2Client();   
      var instancesRequest = new DescribeInstancesRequest();
     
      instancesRequest.Filter.Add(new Filter() { Name = "tag:Name", Value = new List { "*" } });

      DescribeInstancesResponse statusResponse = ec2Client.DescribeInstances(instancesRequest);

      foreach (var item in statusResponse.DescribeInstancesResult.Reservation)
      {
        Console.WriteLine(item.RunningInstance.ElementAt(0).Tag.Where(x => x.Key == "Name").First().Value);
        Console.WriteLine(item.RunningInstance.ElementAt(0).InstanceId);
        Console.WriteLine("\n");
      }     

      Console.ReadLine();
      Console.WriteLine("\n\nDone.");
    }
  }
}