Amazon AWS creating EBS(Elastic block storage) through Java API

Question

I am trying to find a way to create a new EBS and attach it to a running instance pro grammatically through the AWSJavaSDK. I see ways to do this with command line tools and with rest based calls but no way through the SDK proper.

Answer 1

You should be able to use createVolume to create the item. That looks to return a CreateVolumeResult, which has a Volume object inside.

You would then take the Volume returned from the createVolume call and attachVolume with a matching AttachVolumeRequest.

This is all done after you create one of AWS AmazonEC2Client objects: documentation is all pulled from here.

Workflow of the code would probably look like this (note: pseudo code is used and there may be a few more pieces to hook in but the workflow should look something like this)

AWSCredentials credentials = new AWSCredentials();
AmazonEC2Client client = new AmazonEC2Client(credentials);
CreateVolumeResult request = new  CreateVolumeRequest(java.lang.Integer size,
                       java.lang.String availabilityZone);
CreateVolumeResponse volumeResponse = client.createVolume(request);
AttachVolumeRequest attachRequest = new AttachVolumeRequest(volumeResponse.getVolume().getVolumeId(),  java.lang.String instanceId, java.lang.String device);
client.attachVolume(attachRequest);

Answer 2

Please refer the following code to create the EBS volumes using java API.

public void createVolume(String instanceId){
    System.out.println("Creating the volume begins...");
    CreateVolumeRequest  creq = new CreateVolumeRequest(50, "us-west-2a");
    CreateVolumeResult cres =  ec2.createVolume(creq);

     // Create the list of tags we want to create
    System.out.println("Setting the tags to the volume...");
    ArrayList<Tag> instanceTags = new ArrayList<Tag>();
    instanceTags.add(new Tag("Name","Sachin"));
    CreateTagsRequest createTagsRequest = new CreateTagsRequest().withTags(instanceTags).withResources(cres.getVolume().getVolumeId());
    ec2.createTags(createTagsRequest);
    System.out.println("Attaching the volume to the instance....");
    AttachVolumeRequest areq = new AttachVolumeRequest(cres.getVolume().getVolumeId(),instanceId, "/dev/sdh");
    AttachVolumeResult ares = ec2.attachVolume(areq);
    System.out.println("Creating the volume ends...");
}