Don't count reserved partitions (gpt) when checking if any exist

[wongma7]

What type of PR is this?
/kind bug

What this PR does / why we need it: see #144: with gpt being default, there is some 128MB reserved partition at beginning of disk. LIke

PartitionNumber  DriveLetter Offset                                        Size Type
---------------  ----------- ------                                        ---- ----
1                            1048576                                     128 MB Reserved
2                            135266304                                 19.87 GB Basic

Don't count it when checking if partition exists.

Which issue(s) this PR fixes:

Fixes #144

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

Hi @wongma7. Thanks for your PR.

I'm waiting for a kubernetes-csi member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[Jiawei0227]

/ok-to-test
/cc @jingxu97

[jingxu97]

/lgtm

[wongma7]

rebased (took a few tries xd)

[ddebroy]

Please update the comment at

csi-proxy/internal/os/disk/api.go

Line 36 in 2b7dc43

// PartitionsExist checks if the disk `diskNumber` has any partitions.

to state that reserved partition types are excluded.

Windows allows you to create Reserved partitions as well for GPT: https://docs.microsoft.com/en-us/powershell/module/storage/new-partition?view=windowsserver2019-ps [Microsoft Reserved - "{e3c9e316-0b5c-4db8-817d-f92df00215ae}"]

Instead of the change in the PR, how about listing partitions and skipping a single reserved partition if disk is GPT in

csi-proxy/internal/server/disk/server.go

Line 70 in 2b7dc43

partitioned, err := s.hostAPI.PartitionsExist(diskNumber)

[wongma7]

What about making it just check for Basic partitions? (Type -eq Basic). since this is an internal function only used by PartitionDisk (which is part of the API) to check whether CreatePartition needs to be called, and CreatePartition always creates a Basic partition, I think it is best to narrow the scope to just Basic

[wongma7]

What about making it just check for Basic partitions?

I just pushed a change for what this looks like

52    6156 server.go:113] Request: ListDiskIDs
I0603 20:28:37.491552    6156 api.go:69] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c (Get-Disk | Select Path, SerialNumber) | ConvertTo-Json"
I0603 20:28:40.172585    6156 server.go:122] calling PathExists with path "c:\\var\\lib\\kubelet\\plugins\\kubernetes.io\\csi\\pv\\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\\globalmount"
I0603 20:28:40.173288    6156 server.go:274] GetVolumeIDFromTargetPath: Request: &{TargetPath:c:\var\lib\kubelet\plugins\kubernetes.io\csi\pv\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\globalmount}
I0603 20:28:40.176496    6156 api.go:51] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c (Get-Item -Path c:\\var\\lib\\kubelet\\plugins\\kubernetes.io\\csi\\pv\\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\\globalmount).Target"
E0603 20:28:40.552050    6156 server.go:283] failed GetVolumeIDFromTargetPath: error getting the volume for the mount c:\var\lib\kubelet\plugins\kubernetes.io\csi\pv\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\globalmount, internal error error getting volume from mount. cmd: (Get-Item -Path c:\var\lib\kubelet\plugins\kubernetes.io\csi\pv\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\globalmount).Target, output: , error: <nil>
I0603 20:28:40.560078    6156 server.go:49] Request: PartitionDisk with diskNumber=5
I0603 20:28:40.563608    6156 api.go:69] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c Get-Disk -Number 5 | Where partitionstyle -eq 'raw'"
I0603 20:28:42.931157    6156 server.go:59] Initializing disk 5
I0603 20:28:42.933984    6156 api.go:69] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c Initialize-Disk -Number 5 -PartitionStyle GPT"
I0603 20:28:45.275301    6156 server.go:69] Checking if disk 5 has basic partitions
I0603 20:28:45.277312    6156 api.go:69] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c Get-Partition | Where DiskNumber -eq 5 | Where Type -eq Basic"
I0603 20:28:47.533401    6156 server.go:76] Creating basic partition on disk 5
I0603 20:28:47.536044    6156 api.go:69] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c New-Partition -DiskNumber 5 -UseMaximumSize"
I0603 20:28:49.993549    6156 server.go:25] ListVolumesOnDisk: Request: &{DiskNumber:5 PartitionNumber:0}
I0603 20:28:50.008933    6156 api.go:51] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c (Get-Disk -Number 5 | Get-Partition | Get-Volume).UniqueId"
I0603 20:28:52.604848    6156 server.go:97] IsVolumeFormatted: Request: &{VolumeId:\\?\Volume{0c64d232-5bcd-4cff-b9c3-d0e96a34f515}\}
I0603 20:28:52.607428    6156 api.go:51] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c (Get-Volume -UniqueId \"\\\\?\\Volume{0c64d232-5bcd-4cff-b9c3-d0e96a34f515}\\\" -ErrorAction Stop).FileSystemType"
I0603 20:28:54.944565    6156 server.go:116] FormatVolume: Request: &{VolumeId:\\?\Volume{0c64d232-5bcd-4cff-b9c3-d0e96a34f515}\}
I0603 20:28:54.947178    6156 api.go:51] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c Get-Volume -UniqueId \"\\\\?\\Volume{0c64d232-5bcd-4cff-b9c3-d0e96a34f515}\\\" | Format-Volume -FileSystem ntfs -Confirm:$false"
I0603 20:29:00.160646    6156 server.go:39] MountVolume: Request: &{VolumeId:\\?\Volume{0c64d232-5bcd-4cff-b9c3-d0e96a34f515}\ TargetPath:c:\var\lib\kubelet\plugins\kubernetes.io\csi\pv\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\globalmount}
I0603 20:29:00.161292    6156 api.go:51] Executing command: "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe /c Get-Volume -UniqueId \"\\\\?\\Volume{0c64d232-5bcd-4cff-b9c3-d0e96a34f515}\\\" | Get-Partition | Add-PartitionAccessPath -AccessPath c:\\var\\lib\\kubelet\\plugins\\kubernetes.io\\csi\\pv\\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\\globalmount"
I0603 20:29:03.286442    6156 server.go:122] calling PathExists with path "c:\\var\\lib\\kubelet\\pods\\ef469fdf-6cab-4535-8cd0-23d911a08e0d\\volumes\\kubernetes.io~csi\\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\\mount"
I0603 20:29:03.287104    6156 server.go:172] calling Rmdir with path "c:\\var\\lib\\kubelet\\pods\\ef469fdf-6cab-4535-8cd0-23d911a08e0d\\volumes\\kubernetes.io~csi\\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\\mount"
I0603 20:29:03.287890    6156 server.go:193] calling LinkPath with targetPath "c:\\var\\lib\\kubelet\\pods\\ef469fdf-6cab-4535-8cd0-23d911a08e0d\\volumes\\kubernetes.io~csi\\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\\mount" sourcePath "c:\\var\\lib\\kubelet\\plugins\\kubernetes.io\\csi\\pv\\pvc-ab6391a9-9b7d-4741-9c51-d304d90bf58c\\globalmount"

[ddebroy]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ddebroy, wongma7

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[andyzhangx]

@wongma7 if it's a MBR disk, Type would be IFS, so this change would break existing MBR disk, and before 1.22, default windows disk type would be MBR disk, that's a breaking and incompatible change.