OVM Manager Does Not Warn When Last Server Is Placed Into Maintenance Mode
Last updated on MAY 17, 2018
Applies to:Oracle VM - Version 3.0.1 to 3.4.1 [Release OVM30 to OVM34]
In some old version Oracle VM environment (3.4.1 and eariler), where live VM's are running in the last operational Oracle VM Server it is required to show an error message if we are trying to put the(last operational) Oracle VM Server into Maintenance Mode. Which was not happening as reported by the customer.
Each virtualization server in an Oracle VM Server cluster can be in either an operational state, where VM guests may be run, and a maintenance mode, where VM guests cannot be run. You use the Oracle VM Manager tool to control each virtualization server's state.
As an example to illustrate our issue, imagine a two-node cluster with VM guests running on both. You desire to place one node into maintenance mode. First the VM guests must be live-migrated off and the server is then put into maintenance mode. Sometime later you, or perhaps another administrator, decides to place the second virtualization into maintenance mode. The Oracle VM Manager allows this, but the VM guests have no place to go and cannot be migrated to the other node, because that node is also in maintenance mode.
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