Find all attached volumes for EC2 instance
I am using the below code to get all available volumes under EC2. But I cant find Ec2 api to get already attached volumes with instance. Please let me know how to get all attached volumes using instanceId.
EC2Api ec2Api = computeServiceContext.unwrapApi(EC2Api.class);
List<String> volumeLists = new ArrayList<String>();
if (null != volumeId) {
volumeLists.add(volumeId);
}
String[] volumeIds = volumeLists.toArray(new String[0]);
LOG.info("the volume IDs got from user is ::"+ Arrays.toString(volumeIds));
Set<Volume> ec2Volumes = ec2Api.getElasticBlockStoreApi().get()
.describeVolumesInRegion(region, volumeIds);
Set<Volume> availableVolumes = Sets.newHashSet();
for (Volume volume : ec2Volumes) {
if (volume.getSnapshotId() == null
&& volume.getStatus() == Volume.Status.AVAILABLE) {
LOG.debug("available volume with no snapshots ::" + volume.getId());
availableVolumes.add(volume);
}
}
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You can filter the output of the API2 DescribeVolumes API call . There are various filters attachment.*
that you want to filter using the attached instance id. Try the following code:
Multimap<String, String> filter = ArrayListMultimap.create();
filter.put("attachment.instance-id", instanceId);
filter.put("attachment.status", "attached");
Set<Volume> volumes = ec2Api.getElasticBlockStoreApi().get()
.describeVolumesInRegionWithFilter(region, volumeIds, filter);
filter
is Multimap
with the keys and values you want to filter. You can actually specify the same filter multiple times, for example so that all volumes are bound to several different instances.
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The Java SDK now provides a method to get all block mappings for an instance. You can use this to get a list of all mounted volumes:
// First get the EC2 instance from the id
DescribeInstancesRequest describeInstancesRequest = new DescribeInstancesRequest().withInstanceIds(instanceId);
DescribeInstancesResult describeInstancesResult = ec2.describeInstances(describeInstancesRequest);
Instance instance = describeInstancesResult.getReservations().get(0).getInstances().get(0);
// Then get the mappings
List<InstanceBlockDeviceMapping> mappingList = instance.getBlockDeviceMappings();
for(InstanceBlockDeviceMapping mapping: mappingList) {
System.out.println(mapping.getEbs().getVolumeId());
}
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You can use volumeAttachmentApi.listAttachmentsOnServer () for this.
NovaApi novaApi = context.unwrapApi(NovaApi.class);VolumeApi volumeApi = novaApi.getVolumeExtensionForZone(region).get();
VolumeAttachmentApi volumeAttachmentApi = novaApi.getVolumeAttachmentExtensionForZone(region).get();
volumeAttachmentApi.listAttachmentsOnServer(serverId)
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