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B OpenNebula/one#8073: Skip cluster optimization for unsupported VM states #996

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B OpenNebula/one#8073: Fix migration states
ms4ons Sep 30, 2026
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B OpenNebula/one#8073: Add explanation of VM states for cluster optim…
ms4ons Sep 30, 2026
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mattrowe-opennebula Oct 5, 2026
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2 changes: 2 additions & 0 deletions content/product/cloud_system_administration/scheduler/drs.md
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Expand Up @@ -26,6 +26,8 @@ OpenNebula DRS employs an integer linear programming (ILP) solver to optimize Cl

A VM might be migrated to another Host or another datastore, but can't change both Host and datastore simultaneously.

Migration recommendations can be made for the VMs in the following [states]({{% relref "product/operation_references/configuration_references/vm_states" %}}): `ACTIVE`/`RUNNING`, `SUSPENDED`, or `POWEROFF`. VMs in the `UNDEPLOYED` and `STOPPED` states are not considered. If the Cluster contains a VM in any other state, resource optimization is skipped.

## Configuration and Usage

**To enable OneDRS**: In Sunstone, go to **Infrastructure -> Clusters**, select the relevant Cluster then click **Enable OneDRS** in the **OneDRS** tab. Alternatively, in the Cluster template set the `ONE_DRS` configuration attribute.
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2 changes: 1 addition & 1 deletion content/product/virtual_machines_operation/virtual_machines/vm_instances.md
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Expand Up @@ -915,7 +915,7 @@ Datastore Migration allows the transfer of a VM's disk images and associated fil

Depending on the state of the VM and the underlying storage drivers, OpenNebula supports two primary methods:

* **Cold Storage Migration**: Performed when the VM is in a POWEROFF or UNDEPLOYED state. The disks are moved physically between datastores before the VM is resumed.
* **Cold Storage Migration**: Performed when the VM is in a POWEROFF or SUSPENDED state. The disks are moved physically between datastores before the VM is resumed.

* **Live Storage Migration**: Performed while the VM is RUNNING. OpenNebula coordinates with the hypervisor to mirror disk writes to the new destination in real-time, ensuring zero downtime for the workload.

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