Attempting to extend a RHEV Storage Domain fails with "Failed to connect Host <UNKNOWN> to device."

Solution Verified - Updated -

Issue

  • LUN addition fails with the following error reported in the Events pane in the RHEV-M GUI;
Failed to connect Host <UNKNOWN> to device.
  • All the virtual machines on the hypervisor became unresponsive, although the hypervisor itself stayed Up. None of the VM's could be reset, powered off, shutdown, etc.

  • An attempt to extend a Storage Domain failed with an ERROR_CANNOT_EXTEND_CONNECTION_FAILED error reported in the var/log/ovirt-engine/engine.log file;

2013-07-05 00:00:51,510 ERROR [org.ovirt.engine.core.bll.storage.ConnectAllHostsToLunCommand] (http-/0.0.0.0:8443-6) [422c5cb6] Transaction rolled-back for command: org.ovirt.engine.core.bll.storage.ConnectAllHostsToLunCommand.
2013-07-05 00:00:51,540 WARN  [org.ovirt.engine.core.bll.storage.ExtendSANStorageDomainCommand] (http-/0.0.0.0:8443-6) [422c5cb6] CanDoAction of action ExtendSANStorageDomain failed. Reasons:VAR__TYPE__STORAGE__DOMAIN,VAR__ACTION__EXTEND,ERROR_CANNOT_EXTEND_CONNECTION_FAILED,$lun  

Environment

  • Red Hat Enterprise Virtualization (RHEV) 3.1
  • Red Hat Enterprise Linux (RHEL) 6.4 hosts
    • vdsm-4.10.2-1.13
    • libvirt-0.10.2-18.el6_4.5

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content