(Delphi ActiveX) EC2 Check Instance Status

See more Amazon EC2 Examples

Demonstrates how to send a request to check the status of Amazon EC2 instances.

For more information, see https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeInstanceStatus.html

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: TChilkatRest;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
success: Integer;
authAws: TChilkatAuthAws;
responseXml: WideString;
xml: TChilkatXml;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

rest := TChilkatRest.Create(Self);

// Connect to the Amazon AWS server.
// such as https://ec2.amazonaws.com/
bTls := 1;
port := 443;
bAutoReconnect := 1;
success := rest.Connect('ec2.us-west-2.amazonaws.com',port,bTls,bAutoReconnect);

// Provide AWS credentials for the REST call.
authAws := TChilkatAuthAws.Create(Self);
authAws.AccessKey := 'AWS_ACCESS_KEY';
authAws.SecretKey := 'AWS_SECRET_KEY';
// the region should match the region part of the domain passed to the REST connect method (above).
authAws.Region := 'us-west-2';
authAws.ServiceName := 'ec2';

rest.SetAuthAws(authAws.ControlInterface);

rest.AddQueryParam('Action','DescribeInstanceStatus');
rest.AddQueryParam('Version','2016-11-15');

rest.AddQueryParam('InstanceId.1','i-999719995399c9999');
// If you have additional instances to check, then add them with .2, .3, etc.
rest.AddQueryParam('InstanceId.2','i-999719995399c0000');
rest.AddQueryParam('InstanceId.3','i-999719995399c0111');
// ...

// Instead of checking specific instances, you can check all instances by 
// sending the IncludeAllInstances param
rest.AddQueryParam('IncludeAllInstances','true');

responseXml := rest.FullRequestNoBody('GET','/');
if (rest.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// A successful response will have a status code equal to 200.
if (rest.ResponseStatusCode <> 200) then
  begin
    Memo1.Lines.Add('response status code = ' + IntToStr(rest.ResponseStatusCode));
    Memo1.Lines.Add('response status text = ' + rest.ResponseStatusText);
    Memo1.Lines.Add('response header: ' + rest.ResponseHeader);
    Memo1.Lines.Add('response body: ' + responseXml);
    Exit;
  end;

// Examine the successful XML response.
xml := TChilkatXml.Create(Self);
xml.LoadXml(responseXml);
Memo1.Lines.Add(xml.GetXml());

// Here is a sample response:

// Use this online tool to generate parsing code from sample XML: 
// Generate Parsing Code from XML

// <DescribeInstanceStatusResponse xmlns="http://ec2.amazonaws.com/doc/2016-11-15/">
//     <requestId>3be1508e-c444-4fef-89cc-0b1223c4f02fEXAMPLE</requestId>
//     <instanceStatusSet>
//         <item>
//             <instanceId>i-1234567890abcdef0</instanceId>
//             <availabilityZone>us-east-1d</availabilityZone>
//             <instanceState>
//                 <code>16</code>
//                 <name>running</name>
//             </instanceState>
//             <systemStatus>
//                 <status>impaired</status>
//                 <details>
//                     <item>
//                         <name>reachability</name>
//                         <status>failed</status>
//                         <impairedSince>YYYY-MM-DDTHH:MM:SS.000Z</impairedSince>
//                     </item>
//                 </details>
//             </systemStatus>
//             <instanceStatus>
//                 <status>impaired</status>
//                 <details>
//                     <item>
//                         <name>reachability</name>
//                         <status>failed</status>
//                         <impairedSince>YYYY-MM-DDTHH:MM:SS.000Z</impairedSince>
//                     </item>
//                 </details>
//             </instanceStatus>
//             <eventsSet>
//               <item>
//                 <code>instance-retirement</code>
//                 <description>The instance is running on degraded hardware</description>
//                 <notBefore>YYYY-MM-DDTHH:MM:SS+0000</notBefore>
//                 <notAfter>YYYY-MM-DDTHH:MM:SS+0000</notAfter>
//               </item>
//             </eventsSet>
//         </item>
//         <item>
//             <instanceId>i-0598c7d356eba48d7</instanceId>
//             <availabilityZone>us-east-1d</availabilityZone>
//             <instanceState>
//                 <code>16</code>
//                 <name>running</name>
//             </instanceState>
//             <systemStatus>
//                 <status>ok</status>
//                 <details>
//                     <item>
//                         <name>reachability</name>
//                         <status>passed</status>
//                     </item>
//                 </details>
//             </systemStatus>
//             <instanceStatus>
//                 <status>ok</status>
//                 <details>
//                     <item>
//                         <name>reachability</name>
//                         <status>passed</status>
//                     </item>
//                 </details>
//             </instanceStatus>
//             <eventsSet>
//               <item>
//                 <code>instance-reboot</code>
//                 <description>The instance is scheduled for a reboot</description>
//                 <notBefore>YYYY-MM-DDTHH:MM:SS+0000</notBefore>
//                 <notAfter>YYYY-MM-DDTHH:MM:SS+0000</notAfter>
//               </item>
//             </eventsSet>
//         </item>
//         <item>
//             <instanceId>i-0987654321abcdef0</instanceId>
//             <availabilityZone>us-east-1d</availabilityZone>
//             <instanceState>
//                 <code>16</code>
//                 <name>running</name>
//             </instanceState>
//             <systemStatus>
//                 <status>ok</status>
//                 <details>
//                     <item>
//                         <name>reachability</name>
//                         <status>passed</status>
//                     </item>
//                 </details>
//             </systemStatus>
//             <instanceStatus>
//                 <status>ok</status>
//                 <details>
//                     <item>
//                         <name>reachability</name>
//                         <status>passed</status>
//                     </item>
//                 </details>
//             </instanceStatus>
//         </item>
//         <item>
//             <instanceId>i-0598c7d356eba48d8</instanceId>
//             <availabilityZone>us-east-1d</availabilityZone>
//             <instanceState>
//                 <code>16</code>
//                 <name>running</name>
//             </instanceState>
//             <systemStatus>
//                 <status>ok</status>
//                 <details>
//                     <item>
//                         <name>reachability</name>
//                         <status>passed</status>
//                     </item>
//                 </details>
//             </systemStatus>
//             <instanceStatus>
//                 <status>insufficient-data</status>
//                 <details>
//                     <item>
//                         <name>reachability</name>
//                         <status>insufficient-data</status>
//                     </item>
//                 </details>
//             </instanceStatus>
//          </item>
//     </instanceStatusSet>
// </DescribeInstanceStatusResponse>
end;