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Red Hat Enterprise Virtualization 3 - Cannot Create Export Storage Domain

Title: Red Hat Enterprise Virtualization 3 - Cannot Create Export Storage Domain
Object Name: mmr_kc-0108935
Document Type: Support Information
Original owner: KCS - Linux
Disclosure level: Public
Version state: final
Environment
FACT:RHEV3
FACT:Attempting to create new Export storage domain for VM backups.
Questions/Symptoms
SYMPTOM:Attempting to create a new Export storage domain fails.
SYMPTOM:RHEV-M Administrator portal reports:  "Error while executing action: Cannot add Storage.  Internal error, Storage Connection doesn't exist."
SYMPTOM:vdsm.log on RHEV-H hypervisor reports:  "StorageServerAccessPermissionError: Permission settings on the specified path do not allow access to the storage."
Cause
CAUSE:This problem occurs when the permissions on the NFS server don't allow the vdsm user on the hypervisor sufficient permissions to create the storage domain.  The /var/log/vdsm/vdsm.log on the RHEV-H hypervisor on which the mount is attempted reports:

Thread-480320::ERROR::2013-09-13 13:21:53,382::hsm::2298::Storage.HSM::(connectStorageServer) Could not connect to storageServer
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/hsm.py", line 2295, in connectStorageServer
  File "/usr/share/vdsm/storage/storageServer.py", line 302, in connect
  File "/usr/share/vdsm/storage/storageServer.py", line 208, in connect
  File "/usr/share/vdsm/storage/fileSD.py", line 57, in validateDirAccess
StorageServerAccessPermissionError: Permission settings on the specified path do not allow access to the storage. Verify permission settings on the specified storage path.: 'path = /rhev/data-center/mnt/10.22.80.13:_RHEV__export'
Answer/Solution
FIX:Check and correct the owner and permissions of the exported filesystem on the NFS server.  The export directory must have it's owner/group set to UID/GID 36 (vdsm), permissions set to 0755, and be writable by the hypervisors.  Click here to access Red Hat's article with instructions on creating an Export storage domain. Non-HPE site
Disclaimer
NOTE: One or more of the links above will take you outside the Hewlett-Packard Web site, HP does not control and is not responsible for information outside of the HP Web site.

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Legal Disclaimer: Products sold prior to the November 1, 2015 separation of Hewlett-Packard Company into Hewlett Packard Enterprise Company and HP Inc. may have older product names and model numbers that differ from current models.

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Document title: Red Hat Enterprise Virtualization 3 - Cannot Create Export Storage Domain
Document ID: mmr_kc-0108935-4
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