Fix calculation of diskCapacityInGiB by rounding up

[isometry]

• Fix the error Invalid operation for device '0' when cloning a virtual
  machine template with a disk whose size is not an multiple of 1024^3
  bytes, by ensuring that the calculated disk capacity is rounded up
  rather than down.

Description

The vsphere_virtual_machine data source calculates and stores disk size in integer GiB. Unfortunately, without this patch, the calculation always rounds the size down. As a result, if the vsphere_virtual_machine resource is used to clone a template with a non-integer GiB disk, it tries to shrink the disk to the calculated, rounded-down size, resulting in the opaque error Invalid operation for device '0'.

This PR resolves the issue by ensuring that the calculated size is always rounded up rather than down, so that, for example, a Packer-generated template with disk size 42000MiB will be cloned without error to a virtual machine with disk size 42GiB rather than 41GiB.

Acceptance tests

• Have you added an acceptance test for the functionality being added?
• Have you run the acceptance tests on this branch?

Output from acceptance testing:

$ make testacc TESTARGS='-run=TestDiskCapacityInGiB'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test $(go list ./... |grep -v 'vendor') -v -run=TestDiskCapacityInGiB -timeout 240m
?       github.com/hashicorp/terraform-provider-vsphere [no test files]
testing: warning: no tests to run
PASS
ok      github.com/hashicorp/terraform-provider-vsphere/vsphere 0.357s [no tests to run]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/administrationroles    [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/clustercomputeresource  [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/computeresource [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/contentlibrary  [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/customattribute [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/datacenter      [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/datastore       [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/dvportgroup     [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/envbrowse       [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/folder  [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/hostsystem      [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/network [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/nsx     [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/ovfdeploy       [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/provider        [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/resourcepool    [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/spbm    [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/storagepod      [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/structure       [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/testhelper      [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/utils   [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/vappcontainer   [no test files]
testing: warning: no tests to run
PASS
ok      github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/viapi   0.240s [no tests to run]
testing: warning: no tests to run
PASS
ok      github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/virtualdisk     0.588s [no tests to run]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/virtualmachine  [no test files]
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/helper/vsansystem      [no test files]
=== RUN   TestDiskCapacityInGiB
=== RUN   TestDiskCapacityInGiB/capacityInBytes_-_integer_GiB
=== RUN   TestDiskCapacityInGiB/capacityInKB_-_integer_GiB
2021/04/24 12:04:28 [DEBUG] diskCapacityInGiB: capacityInBytes missing for for disk-0-0, falling back to capacityInKB
=== RUN   TestDiskCapacityInGiB/capacityInBytes_-_non-integer_GiB
=== RUN   TestDiskCapacityInGiB/capacityInKB_-_non-integer_GiB
2021/04/24 12:04:28 [DEBUG] diskCapacityInGiB: capacityInBytes missing for for disk-0-0, falling back to capacityInKB
--- PASS: TestDiskCapacityInGiB (0.00s)
    --- PASS: TestDiskCapacityInGiB/capacityInBytes_-_integer_GiB (0.00s)
    --- PASS: TestDiskCapacityInGiB/capacityInKB_-_integer_GiB (0.00s)
    --- PASS: TestDiskCapacityInGiB/capacityInBytes_-_non-integer_GiB (0.00s)
    --- PASS: TestDiskCapacityInGiB/capacityInKB_-_non-integer_GiB (0.00s)
PASS
ok      github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/virtualdevice  0.296s
?       github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/vmworkflow     [no test files]

Release Note

Release note for CHANGELOG:

Fix `Invalid operation for device '0'` error when cloning template with non-integer GiB disk size.

References

• Fixes at least some of the issues reported in v1.17.0 - vsphere_virtual_machine : Invalid operation for device '0' #1016

[hashicorp-cla]

All committers have signed the CLA.

[koikonom]

LGTM! Thanks!

[ghost]

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