How can attach new EBS volume to existing EC2 instance using java sdk?

Question

I have tried using AttachVolumeRequest but in response i get following error

 Caught Exception: The request must contain the parameter volume
 Reponse Status Code: 400
 Error Code: MissingParameter

here is my code , in this code ec2 is my amazonclient object and its work fine so far

AttachVolumeRequest attachRequest=new AttachVolumeRequest()
    .withInstanceId("my instance id");
attachRequest.setRequestCredentials(credentials);

EbsBlockDevice ebs=new EbsBlockDevice();
ebs.setVolumeSize(2);

//attachRequest.withVolumeId(ebs.getSnapshotId());

AttachVolumeResult result=ec2.attachVolume(attachRequest);

any help is highly appreciated. thanks in advance

Answer 1

Cause

Class EbsBlockDevice from the AWS SDK for Java serves a different purpose, accordingly method getSnapshotId() only returns The ID of the snapshot from which the volume will be created , ie not the volume ID, hence the respective exception.

Solution

You most likely want to use class CreateVolumeRequest instead, eg (from the top of my head):

CreateVolumeRequest createVolumeRequest = new CreateVolumeRequest()
    .withAvailabilityZone("my instance's AZ") // The AZ in which to create the volume.
    .withSize(2); // The size of the volume, in gigabytes.

CreateVolumeResult createVolumeResult = ec2.createVolume(createVolumeRequest);

AttachVolumeRequest attachRequest = new AttachVolumeRequest()
    .withInstanceId("my instance id");
    .withVolumeId(createVolumeResult.getVolume().getVolumeId());

AttachVolumeResult attachResult = ec2.attachVolume(attachRequest);