Add source_file to incus_storage_volume

[SpiffyEight77]

Description

Close #126

Add source_file to incus_storage_volume

• source code
• document
• test case

Testing

Export the backup volume

root@playground:~/backup# incus storage volume list mypool
+--------+----------+-------------+--------------+---------+
|  TYPE  |   NAME   | DESCRIPTION | CONTENT-TYPE | USED BY |
+--------+----------+-------------+--------------+---------+
| custom | myvolume |             | filesystem   | 0       |
+--------+----------+-------------+--------------+---------+

root@playground:~/backup# incus storage volume export mypool myvolume
Backup exported successfully!
root@playground:~/backup# ls
backup.tar.gz

Import the backup volume by terraform with source_file argument

root@playground:~/terraform-incus# terraform apply
╷
│ Warning: Provider development overrides are in effect
│
│ The following provider development overrides are set in the CLI configuration:
│  - lxc/incus in /root/terraform-provider-incus
│
│ The behavior may therefore not match any released version of the provider and applying changes may cause the
│ state to become incompatible with published releases.
╵
incus_storage_pool.pool1: Refreshing state... [name=mypool]
incus_storage_volume.volume1: Refreshing state... [name=myvolume]
incus_storage_volume.volume1_copy: Refreshing state... [name=myvolume_copy]

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated
with the following symbols:
  + create

Terraform will perform the following actions:

  # incus_storage_volume.volume_from_backup will be created
  + resource "incus_storage_volume" "volume_from_backup" {
      + config       = {}
      + content_type = "filesystem"
      + description  = ""
      + location     = (known after apply)
      + name         = "restored-volume"
      + pool         = "mypool"
      + source_file  = "/root/backup/backup.tar.gz"
      + target       = (known after apply)
      + type         = "custom"
    }

Plan: 1 to add, 0 to change, 0 to destroy.

root@playground:~/backup# incus storage volume list mypool
+--------+-----------------+-------------+--------------+---------+
|  TYPE  |      NAME       | DESCRIPTION | CONTENT-TYPE | USED BY |
+--------+-----------------+-------------+--------------+---------+
| custom | myvolume        |             | filesystem   | 0       |
+--------+-----------------+-------------+--------------+---------+
| custom | restored-volume |             | filesystem   | 0       |
+--------+-----------------+-------------+--------------+---------+

[SpiffyEight77]

I'm sorry, but I currently don't have a solution for creating a backup volume for testacc. As a result, I will temporarily skip the TestAccStorageVolume_sourceFile test.

[stgraber]

@SpiffyEight77 can you have the test do something like this as a prep step:

• incus storage volume create default test_volume_create
• incus storage volume export default test_volume_create
• incus storage volume delete default test_volume_create

The second command should give you a backup.tar.gz that's suitable for importing.