Not able to import .vmdk images exported from Oracle Virtualbox to GCP

[RVP RVP]

Since it requires image in the .tar.gz file 

Tried to convert this image to RAW format but failed to do so.

Creating image "image-1" failed. Error: Invalid value for field 'resource.id': '0'. The provided source location is not a .tar.gz file

C:\Program Files\Oracle\VirtualBox>VBoxManage clonehd PGT_Trial_VM-disk1.vmdk DSGnewimage.raw --format RAW

VBoxManage.exe: error: Could not get the storage format of the medium 'C:\Program Files\Oracle\VirtualBox\PGT_Trial_VM-disk1.vmdk' (VERR_NOT_SUPPORTED)

VBoxManage.exe: error: Details: code VBOX_E_IPRT_ERROR (0x80bb0005), component MediumWrap, interface IMedium, callee IUnknown

VBoxManage.exe: error: Context: "OpenMedium(Bstr(pszFilenameOrUuid).raw(), enmDevType, enmAccessMode, fForceNewUuidOnOpen, pMedium.asOutParam())" at line 179 of file VBoxManageDisk.cpp

C:\Program Files\Oracle\VirtualBox>VBoxManage.exe modifymedium --resize 60000 "PGT_Trial_VM-disk1.vmdk"

VBoxManage.exe: error: Could not get the storage format of the medium 'C:\Program Files\Oracle\VirtualBox\PGT_Trial_VM-disk1.vmdk' (VERR_NOT_SUPPORTED)

VBoxManage.exe: error: Details: code VBOX_E_IPRT_ERROR (0x80bb0005), component MediumWrap, interface IMedium, callee IUnknown

VBoxManage.exe: error: Context: "OpenMedium(Bstr(pszFilenameOrUuid).raw(), enmDevType, enmAccessMode, fForceNewUuidOnOpen, pMedium.asOutParam())" at line 179 of file VBoxManageDisk.cpp

[RVP RVP]

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[Fady (Google Cloud Platform)]

As you mentioned, and per this document, when exporting a disk image to Google Cloud platform, it must be in RAW format. Therefore, if it is not, it should be converted to this format first before you start the export (import from the point of view of GCE). In your case, you seem to have attempted to convert your Oracle Virtualbox disk image using their (VBoxManage) tool and encountered the error message above. I am not an expert on Virtualbox, but it seems that the tool can only convert VDI format to RAW and not from VMDK. I found this third party article that may help, that is suggesting using qemu-img to convert VMDK to RAW as follows :

$ qemu-img convert -f vmdk -O raw image.vmdk image.img

If that did not work, and since the question is more related to converting VMDK to RAW, I suggest posting your question at serverfault.com or superuser.com where you have access to a large community of enthusiasts and experts to share ideas with and get support from.