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vsphere: check if volume exists before create

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Sometimes, volume creation can succeed right as the request times out,
causing k8s to interpret it as a failure. When the request is retried,
we want it to succeed. When trying this in vSphere, the second create
request failed with "already exists" and it never recovered.

This adds a check to the in-tree vsphere storage plugin that checks if a
VMDK exists before trying to create it. The check is done BEFORE create.

Tested: manual only )-:
This commit is contained in:
Jonathan Basseri 2019-10-11 15:03:31 -07:00
parent eedfb6bc7a
commit 131668a03f
1 changed files with 12 additions and 4 deletions
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16
staging/src/k8s.io/legacy-cloud-providers/vsphere/vclib/diskmanagers/vdm.go
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@ -39,11 +39,17 @@ func (diskManager virtualDiskManager) Create(ctx context.Context, datastore *vcl
if diskManager.volumeOptions.SCSIControllerType == "" {
diskManager.volumeOptions.SCSIControllerType = vclib.LSILogicControllerType
}
// Create virtual disk
diskFormat := vclib.DiskFormatValidType[diskManager.volumeOptions.DiskFormat]
// Create a virtual disk manager
vdm := object.NewVirtualDiskManager(datastore.Client())
// Check for existing VMDK before attempting create. Because a name collision
// is unlikely, "VMDK already exists" is likely from a previous attempt to
// create this volume.
if dsPath := vclib.GetPathFromVMDiskPath(diskManager.diskPath); datastore.Exists(ctx, dsPath) {
klog.V(2).Infof("Create: VirtualDisk already exists, returning success. Name=%q", diskManager.diskPath)
return diskManager.diskPath, nil
}
// Create specification for new virtual disk
diskFormat := vclib.DiskFormatValidType[diskManager.volumeOptions.DiskFormat]
vmDiskSpec := &types.FileBackedVirtualDiskSpec{
VirtualDiskSpec: types.VirtualDiskSpec{
AdapterType: diskManager.volumeOptions.SCSIControllerType,
@ -51,6 +57,8 @@ func (diskManager virtualDiskManager) Create(ctx context.Context, datastore *vcl
},
CapacityKb: int64(diskManager.volumeOptions.CapacityKB),
}
vdm := object.NewVirtualDiskManager(datastore.Client())
requestTime := time.Now()
// Create virtual disk
task, err := vdm.CreateVirtualDisk(ctx, diskManager.diskPath, datastore.Datacenter.Datacenter, vmDiskSpec)