B4X
B4X
EC2 Check Instance Status
See more Amazon EC2 Examples
Demonstrates how to send a request to check the status of Amazon EC2 instances.Chilkat B4X Downloads
Dim success As Boolean = False
' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.
Dim rest As ChilkatRest
rest.Initialize("rest")
' Connect to the Amazon AWS server.
' such as https://ec2.amazonaws.com/
Dim bTls As Boolean = True
Dim port As Int = 443
Dim bAutoReconnect As Boolean = True
success = rest.Connect("ec2.us-west-2.amazonaws.com", port, bTls, bAutoReconnect)
' Provide AWS credentials for the REST call.
Dim authAws As ChilkatAuthAws
authAws.Initialize
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)
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")
Dim responseXml As String = rest.FullRequestNoBody("GET", "/")
If rest.LastMethodSuccess <> True Then
Log(rest.LastErrorText)
Return
End If
' A successful response will have a status code equal to 200.
If rest.ResponseStatusCode <> 200 Then
Log("response status code = " & rest.ResponseStatusCode)
Log("response status text = " & rest.ResponseStatusText)
Log("response header: " & rest.ResponseHeader)
Log("response body: " & responseXml)
Return
End If
' Examine the successful XML response.
Dim xml As ChilkatXml
xml.Initialize
xml.LoadXml(responseXml)
Log(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>