OLVM: How to Remove a Defunct Host From oVirt Engine
(Doc ID 2540819.1)
Last updated on DECEMBER 15, 2020
Applies to:Linux OS - Version Oracle Linux 7.6 with Unbreakable Enterprise Kernel [4.14.35] and later
Checked for currency 14-Dec-20.
A Host server - that may have been running VMs - becomes non-operational and cannot be recovered - e.g. it is permanently destroyed by fire.
- the engine will not be aware of why a host is unresponsive, the assumption being it will become online again sometime.
- the VMs it was running cannot be started elsewhere - the engine assumes they are still running on the unresponsive host.
- the host cannot be put into maintenance mode to remove it.
To remove a host, it must be in maintenance mode with the engine showing no VMs running.
- the engine shows the host status as "NonResponsive"
- the engine may have "Handling non responsive Host <HOST_NAME>" failed events
- the "Management" drop-down list may have "Maintenance" greyed out
- even if the Maintenance item can be selected, the engine rejects attempts to place the host into maintenance mode
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