从JAVA API获取Amazon EC2实例的公共DNS
我已经成功地从JavaAPI启动、停止并检查了先前创建的EC2实例的状态。但是,我很难获取此实例的公共dns地址。由于我使用StartInstanceRequest启动实例并使用StartInstanceResponse获取响应,因此无法检索实际的实例对象。我的起始代码如下所示,它可以工作:从JAVA API获取Amazon EC2实例的公共DNS,java,ssh,amazon-ec2,amazon,jsch,Java,Ssh,Amazon Ec2,Amazon,Jsch,我已经成功地从JavaAPI启动、停止并检查了先前创建的EC2实例的状态。但是,我很难获取此实例的公共dns地址。由于我使用StartInstanceRequest启动实例并使用StartInstanceResponse获取响应,因此无法检索实际的实例对象。我的起始代码如下所示,它可以工作: BasicAWSCredentials oAWSCredentials = new BasicAWSCredentials(sAccessKey, sSecretKey); AmazonEC2 ec2 =
BasicAWSCredentials oAWSCredentials = new BasicAWSCredentials(sAccessKey, sSecretKey);
AmazonEC2 ec2 = new AmazonEC2Client(oAWSCredentials);
ec2.setEndpoint("https://eu-west-1.ec2.amazonaws.com");
List<String> instanceIDs = new ArrayList<String>();
instanceIDs.add("i-XXXXXXX");
StartInstancesRequest startInstancesRequest = new StartInstancesRequest(instanceIDs);
try {
StartInstancesResult response = ec2.startInstances(startInstancesRequest);
System.out.println("Sent! "+response.toString());
}catch (AmazonServiceException ex){
System.out.println(ex.toString());
return false;
}catch(AmazonClientException ex){
System.out.println(ex.toString());
return false;
}
BasicAWSCredentials-oAWSCredentials=新的BasicAWSCredentials(sAccessKey,sSecretKey);
AmazonEC2 ec2=新的AmazonEC2Client(oAWSCredentials);
ec2.setEndpoint(“https://eu-west-1.ec2.amazonaws.com");
List instanceId=new ArrayList();
instanceId.add(“i-XXXXXXX”);
StartInstanceRequest StartInstanceRequest=新的StartInstanceRequest(InstanceId);
试一试{
StartInstancesResult响应=ec2.startInstances(startInstancesRequest);
System.out.println(“Sent!”+response.toString());
}捕获(AmazonServiceException ex){
System.out.println(例如toString());
返回false;
}捕获(AmazonClientException ex){
System.out.println(例如toString());
返回false;
}
此外,通过JSch连接到此实例的任何帮助都将不胜感激
非常感谢 这里有一个方法可以做到这一点。在调用此函数之前,最好检查实例是否处于运行状态
String getInstancePublicDnsName(String instanceId) {
DescribeInstancesResult describeInstancesRequest = ec2.describeInstances();
List<Reservation> reservations = describeInstancesRequest.getReservations();
Set<Instance> allInstances = new HashSet<Instance>();
for (Reservation reservation : reservations) {
for (Instance instance : reservation.getInstances()) {
if (instance.getInstanceId().equals(instanceId))
return instance.getPublicDnsName();
}
}
return null;
}
String getInstancePublicDnsName(String instanceId){
DescribeInstancesResult describeInstancesRequest=ec2.describeInstances();
List reservations=descripbeinstancesrequest.getReservations();
Set allInstances=new HashSet();
用于(预订:预订){
例如(实例:reservation.getInstances()){
if(instance.getInstanceId().equals(instanceId))
返回instance.getPublicDnsName();
}
}
返回null;
}
您现在可以在使用descripbeinstances
时使用过滤器,这样您就不会获取所有实例的信息
private String GetDNS(String aInstanceId)
{
DescribeInstancesRequest request = new DescribeInstancesRequest();
request.withInstanceIds(aInstanceId);
DescribeInstancesResult result = amazonEC2.describeInstances(request);
for (Reservation reservations : result.getReservations())
{
for (Instance instance : reservations.getInstances())
{
if (instance.getInstanceId().equals(aInstanceId))
{
return instance.getPublicDnsName();
}
}
}
return null;
}
使用aws-java-sdk-1.9.35.jar