Expand VM Disk Size for Linux REST API, acli or ncli | Nutanix Community
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It’s totally available in Prism UI. But I find it impossible with API:

  1. In REST API, using PUT /virtual_disks/ “disk_capacity_in_bytes” receives 200 but not size changes.
  2. In ncli, using vdisk edit name=<> max-capacity=<> runs, yet the same no changes.
  3. Since the VM disk of this Linux VM doesn’t belong to any volume group, not an option for acli the way I see it.

And if I do it via VM commands, it’s only able to create new disk or clone disk, not expand which is what I want.

I really need an API for this job. Any ideas? Thanks!

I’m having the exact same issue, have you made any headway? 

Hi LiTian, nsocwx,

Here is an example of how to update a VM disk. Please have a look and let me know if you have any question.

https://github.com/pipoe2h/calm-dsl/blob/dev-platform/blueprints/dev-platform/scripts/escript/expand_disk.py

Hi LiTian, nsocwx,

Here is an example of how to update a VM disk. Please have a look and let me know if you have any question.

https://github.com/pipoe2h/calm-dsl/blob/dev-platform/blueprints/dev-platform/scripts/escript/expand_disk.py

This works. Thank you! I tried REST API V2 using what I thought might be equivalent to your method in V3. I used parameter ‘size’ (and later ‘disk_size_mib’) and it returned 200. But disk size stayed the same. Then I guess this feature just doesn’t work in V2? Any idea how it may work there?

Hi LiTian,

It’s possible with API V2 too. Here an example:

curl -k -u admin --request PUT 'https://<PE_VIP>:9440/PrismGateway/services/rest/v2.0/vms/<VM_UUID>/disks/update' \
--header 'accept: application/json' \
--header 'content-type: application/json' \
--data-raw '{"vm_disks":"{"disk_address":{"vmdisk_uuid":"1d6d63de-e9a1-48ec-bcde-d1318d0a35af","device_uuid":"4d7bf055-748f-4c42-9606-bbcb486a3e1f","device_index":0,"device_bus":"scsi"},"flash_mode_enabled":false,"is_cdrom":false,"is_empty":false,"vm_disk_create":{"storage_container_uuid":"cf074530-5cff-408e-8db5-bac30a12d2b5","size":6442450944}}]}'

The size has to be bytes. Please let us know how it goes.

Hi LiTian,

It’s possible with API V2 too. Here an example:

curl -k -u admin --request PUT 'https://<PE_VIP>:9440/PrismGateway/services/rest/v2.0/vms/<VM_UUID>/disks/update' \
--header 'accept: application/json' \
--header 'content-type: application/json' \
--data-raw '{"vm_disks":"{"disk_address":{"vmdisk_uuid":"1d6d63de-e9a1-48ec-bcde-d1318d0a35af","device_uuid":"4d7bf055-748f-4c42-9606-bbcb486a3e1f","device_index":0,"device_bus":"scsi"},"flash_mode_enabled":false,"is_cdrom":false,"is_empty":false,"vm_disk_create":{"storage_container_uuid":"cf074530-5cff-408e-8db5-bac30a12d2b5","size":6442450944}}]}'

The size has to be bytes. Please let us know how it goes.

This is exactly what I wanted! Works like a charm. Thank you so much! I’d also like to mark this as an answer as not everyone uses Prism Central.

Hi There,

Suppose I wish to extend the VM disk from 2 GB to 10 GB using the rest API with Curl command, How I do that. The available API by Nutanix is not extending the disk its only updating the VM. I can see the changes in Recent task in console.

When I do using GUI the operation shows VM disk update.

But when I do using the API I get only VM update in console.

Using the PUT 

https://192.168.1.1:9440/PrismGateway/services/rest/v2.0/virtual_disks/

 

Thank you

 

@sumitsk Jose’s solution works for me. I think it should be ‘vms/<VM_UUID>/disks’ rather than ‘virtual_disks’. Did you have all the essential parameters, e.g. --raw-data {},  in your command? Can you show your full curl command?

Right now I am testing it inbuild API in nutanix API Explorer. 

I am pasting the PUT inputs

 

{"alert_summary":{"alert_summaries":{},"count":0},"attached_vm_id":"0005d577-2961-75d0-191a-005056add60e::35dcbc29-0889-4b54-8793-706d785ec4d3","attached_vm_uuid":"35dcbc29-0889-4b54-8793-706d785ec4d3","attached_vmname":"REDHAT_8","attached_volume_group_id":"null","cluster_uuid":"0005d577-2961-75d0-191a-005056add60e","device_uuid":"58e91622-e210-4be8-9ff4-3703c5b0a558","disk_address":"scsi.1","disk_capacity_in_bytes":1234567890,"flash_mode_enabled":true,"health_summary":{},"nutanix_nfsfile_path":"/AIT_Container/.acropolis/vmdisk/c0f461dd-7d95-4899-ad2a-9dbe394953d8","stats":{},"usage_stats":{},"uuid":"c0f461dd-7d95-4899-ad2a-9dbe394953d8","virtual_disk_id":"0005d577-2961-75d0-191a-005056add60e::c0f461dd-7d95-4899-ad2a-9dbe394953d8"}

 

Above one is I am using to give in PUT input inbuilt API.

Task is to extend the second disk which is 3GB and make it 4 GB to 5 GB.

(scsi.1)

 Thank you

Sumit

@sumitsk Can you try the PUT method with /vms/<VM_UUID>/disks, instead of /virtual_disks/ ? I think it will make a difference. Here’s the usage:

https://www.nutanix.dev/reference/prism_element/v2/api/vms/put-vms-uuid-disks-update-updatedisk

Have something like this in ‘body’:

"vm_disks":d{"disk_address":{"vmdisk_uuid":"1d6d63de-e9a1-48ec-bcde-d1318d0a35af","device_uuid":"4d7bf055-748f-4c42-9606-bbcb486a3e1f","device_index":0,"device_bus":"scsi"},"flash_mode_enabled":false,"is_cdrom":false,"is_empty":false,"vm_disk_create":{"storage_container_uuid":"cf074530-5cff-408e-8db5-bac30a12d2b5","size":6442450944}}]

Replace values with yours. Note that even though the parameter says “vm_disk_create”, it’s actually enlarging the designated.

Thanks for your input but some errors are there.

I am looking into errors to sort out them.

 

Thank you

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