How to verify vApp template VMDK checksums in VMware Cloud Director

Products

• VMware Cloud Director

Issue/Introduction

Administrators require a method to verify the SHA1 checksum of a vApp template VMDK residing in a VMware Cloud Director (vCD) catalog against the originally uploaded file to validate package integrity.

Environment

10.x

Cause

During OVF/OVA ingestion into a vCD catalog, the stream-optimized disk is inflated and converted into a standard VMFS format. This process fundamentally alters the binary structure of the disk, inherently changing the SHA1 hash and file size. Therefore, direct cryptographic or file-size comparison of the underlying datastore VMDK to the original uploaded file is architecturally invalid.

Resolution

 

1. Log in to the VMware Cloud Director Tenant Portal.

2. Navigate to the specific catalog containing the target vApp template.

3. Export the vApp template from the vCD catalog as an OVF package.

4. Extract or open the downloaded package and locate the generated manifest (.mf) file.

5. Open the .mf file to read the system-computed SHA1 or SHA256 cryptographic checksums of the exported VMDKs for definitive package validation.

 

Additional Information

Working with Catalogs in VMware Cloud Director