VAMI Backup with SMB reports error: "Path not exported by the remote filesystem"

Products

• VMware vCenter Server

Issue/Introduction

Symptoms:

• VAMI backup fails using SMB Protocol on vCenter 7.0 U3 with the error:

Path not exported by remote file system

• Running this command on the vCenter SSH session returns a value of "1": 

cat /proc/sys/crypto/fips_enabled

• Errors similar to the following are found in /var/log/vmware/applmgmt.log

2021-10-12T11:12:48 AM IST [2953]ERROR:plugins.MountedFSStorageIOLib:Cmd ['/usr/bin/mount', '-t', 'cifs', '//192.168.1.2/VCBackups/', '/storage/remote/backup/cifs/10.168.0.0/zzhhasr/Tghhss', '-o', 'rw,credentials=/tmp/tmpatysss'] failed. rc: 32, stdout: , stderr: mount error(2): No such file or directory
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

Environment

VMware vCenter Server 7.0.3

Cause

This is a known issue on vCenter 7.0 Update 3.

Resolution

This issue is resolved in vCenter Server 7.0 Update 3c.

NOTE : If the /var/log/vmware/applmgmt.log shows similar to below
"2022-01-28T08:16:32 AM -02 [2474]INFO:plugins.MountedFSStorageIOLib:Failed to mount the cifs share //name/iso/VMware at /storage/remote/backup/cifs/name/JJaV0TO5/G1Y846Rr. Err- rc: 32, out=, err=mount error(13): Permission denied
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

NOTE :The preceding log excerpts are only examples. Date, time and environmental variables may vary depending on your environment

This means the credential format for backup may be different ie. switch from using a <domainname>\<username> format for the user to using a <username>@<domainname> format, or vice versa.

Workaround:
To workaround this issue temporarily, use other supported backup protocols as outlined in https://kb.vmware.com/s/article/86032

Additional Information

Impact/Risks:
VAMI backup fails when using SMB as protocol.