issue when trying to clone disk

[locus313]

I am doing some testing of the provider and when using some of the code from the demo example for cloning a disk

resource "hypercore_virtual_disk" "ubuntu-2204" {
  name       = "ubuntu-2204-server-cloudimg-amd64.img"
  source_url = "https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64.img"
}

resource "hypercore_vm" "test-vm" {
  tags       = ["test"]
  name        = "test-vm"
  description = "test VM"
  vcpu        = 4
  memory      = 4096  # MiB
  clone = {
    source_vm_uuid = data.hypercore_vms.template-vm.vms.0.uuid
    meta_data = templatefile("assets/meta-data.ubuntu-22.04.yml.tftpl", {
      name = "test-vm",
    })
    user_data = templatefile("assets/user-data.ubuntu-22.04.yml.tftpl", {
      name                = "test-vm",
      ssh_authorized_keys = "",
      ssh_import_id       = "",
    })
  }

  # snapshot_schedule_uuid = hypercore_vm_snapshot_schedule.demo1.id
  # TODO update, "" -> null

  # Pin VM to the first node in cluster
  # If preferred_node fails, run VM on any other node.
  affinity_strategy = {
    strict_affinity = true
    preferred_node_uuid = data.hypercore_nodes.node_1.nodes.0.uuid
    backup_node_uuid = ""
    # backup_node_uuid = data.hypercore_nodes.node_2.id
  }
}


resource "hypercore_disk" "os" {
  vm_uuid                = hypercore_vm.test-vm.id
  type                   = "VIRTIO_DISK"
  size                   = 20.5  # GB
  source_virtual_disk_id = hypercore_virtual_disk.ubuntu-2204.id
}

I am getting the following error:

Error: Unexpected error
│
│   with hypercore_disk.os,
│   on main.tf line 45, in resource "hypercore_disk" "os":
│   45: resource "hypercore_disk" "os" {
│
│ terraform provider got an unexpected error during execution: runtime error: invalid memory address or nil pointer      
│ dereference

Here is the information from the debug log output:

2025-07-27T13:34:20.248-0700 [INFO]  Starting apply for hypercore_disk.os
2025-07-27T13:34:20.249-0700 [DEBUG] hypercore_disk.os: applying the planned Create change
2025-07-27T13:34:20.249-0700 [INFO]  provider.terraform-provider-hypercore_v1.1.0.exe: TTRT HypercoreDiskResource CONFIGURE: @caller=github.com/hashicorp/terraform-provider-hypercore/internal/provider/hypercore_disk_resource.go:106 @module=hypercore tf_provider_addr=registry.terraform.io/hashicorp/hypercore tf_req_id=5f5f5417-dc77-b160-759e-5d2fc9d76006 tf_resource_type=hypercore_disk tf_rpc=ApplyResourceChange timestamp=2025-07-27T13:34:20.249-0700
2025-07-27T13:34:20.249-0700 [INFO]  provider.terraform-provider-hypercore_v1.1.0.exe: TTRT HypercoreDiskResource CREATE: @caller=github.com/hashicorp/terraform-provider-hypercore/internal/provider/hypercore_disk_resource.go:129 @module=hypercore tf_req_id=5f5f5417-dc77-b160-759e-5d2fc9d76006 tf_resource_type=hypercore_disk tf_rpc=ApplyResourceChange tf_provider_addr=registry.terraform.io/hashicorp/hypercore timestamp=2025-07-27T13:34:20.249-0700
2025-07-27T13:34:20.249-0700 [INFO]  provider.terraform-provider-hypercore_v1.1.0.exe: TTRT Create: vm_uuid=24f5dbf2-c349-49f1-928f-71a2d296f188, type=VIRTIO_DISK, slot=0, size=0: tf_req_id=5f5f5417-dc77-b160-759e-5d2fc9d76006 tf_resource_type=hypercore_disk tf_rpc=ApplyResourceChange @module=hypercore tf_provider_addr=registry.terraform.io/hashicorp/hypercore @caller=github.com/hashicorp/terraform-provider-hypercore/internal/provider/hypercore_disk_resource.go:150 timestamp=2025-07-27T13:34:20.249-0700
2025-07-27T13:34:20.255-0700 [DEBUG] provider.terraform-provider-hypercore_v1.1.0.exe: TTRT No task tag for this task    
: @caller=github.com/hashicorp/terraform-provider-hypercore/internal/utils/task_tag.go:37 @module=hypercore tf_req_id=5f5f5417-dc77-b160-759e-5d2fc9d76006 tf_resource_type=hypercore_disk tf_provider_addr=registry.terraform.io/hashicorp/hypercore tf_rpc=ApplyResourceChange timestamp=2025-07-27T13:34:20.254-0700
2025-07-27T13:34:20.255-0700 [ERROR] provider.terraform-provider-hypercore_v1.1.0.exe: Response contains error diagnostic: @module=sdk.proto diagnostic_summary="Unexpected error" tf_proto_version=6.9 tf_req_id=5f5f5417-dc77-b160-759e-5d2fc9d76006 tf_rpc=ApplyResourceChange @caller=github.com/hashicorp/terraform-plugin-go@v0.28.0/tfprotov6/internal/diag/diagnostics.go:58 diagnostic_detail="terraform provider got an unexpected error during execution: runtime error: invalid memory address or nil pointer dereference" diagnostic_severity=ERROR tf_provider_addr=registry.terraform.io/hashicorp/hypercore tf_resource_type=hypercore_disk timestamp=2025-07-27T13:34:20.255-0700
f_resource_type=hypercore_disk timestamp=2025-07-27T13:34:20.255-0700
2025-07-27T13:34:20.257-0700 [DEBUG] State storage *statemgr.Filesystem declined to persist a state snapshot
f_resource_type=hypercore_disk timestamp=2025-07-27T13:34:20.255-0700
2025-07-27T13:34:20.257-0700 [DEBUG] State storage *statemgr.Filesystem declined to persist a state snapshot
f_resource_type=hypercore_disk timestamp=2025-07-27T13:34:20.255-0700
f_resource_type=hypercore_disk timestamp=2025-07-27T13:34:20.255-0700
2025-07-27T13:34:20.257-0700 [DEBUG] State storage *statemgr.Filesystem declined to persist a state snapshot
2025-07-27T13:34:20.257-0700 [ERROR] vertex "hypercore_disk.os" error: Unexpected error
╷
│ Error: Unexpected error
│
│   with hypercore_disk.os,
│   on main.tf line 45, in resource "hypercore_disk" "os":
│   45: resource "hypercore_disk" "os" {
│
│ terraform provider got an unexpected error during execution: runtime error: invalid memory address or nil pointer      
│ dereference
╵
2025-07-27T13:34:20.260-0700 [DEBUG] provider.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = error reading from server: EOF"
2025-07-27T13:34:20.263-0700 [INFO]  provider: plugin process exited: plugin=.terraform/providers/registry.terraform.io/scalecomputing/hypercore/1.1.0/windows_amd64/terraform-provider-hypercore_v1.1.0.exe id=36796
2025-07-27T13:34:20.263-0700 [DEBUG] provider: plugin exited

Is this a bug? or is there something different I should try?

[domendobnikar]

There's problems with virtual disk attachment, some of the values you've input in this command are "incorrect"/missing.
resource "hypercore_disk" "os" { vm_uuid = hypercore_vm.test-vm.id type = "VIRTIO_DISK" size = 20.5 source_virtual_disk_id = hypercore_virtual_disk.ubuntu-2204.id }
Either the virtual machine doesn't exist or the virtual disk doesn't.
The nil pointer issue is coming from Hypercore API returning empty task UUID which means the attach action didn't start due to problematic input.
There could however be better nil value handling on the side of the provider, this is something that needs to be looked at and fixed because │ terraform provider got an unexpected error during execution: runtime error: invalid memory address or nil pointer │ dereference is not good enough to troubleshoot.

[locus313]

I was finally able to do some more testing after your last comment and was able to get the disk attachment working.

I added in export TF_CLI_ARGS_apply="-parallelism=1" to my .envrc.

Also added depends_on = [ hypercore_vm.test-vm ] into the disk attachment section.

I suspect that it was trying to do the disk attachment before the test-vm was created.

Thanks for looking into this issue.