Most of them are outdated , but provide historical design context.
They are not user documentation and should not be treated as such.
Documentation is available here.
Refresh LUN Size
Support dynamic increase of data domain LUNs in oVirt.
Users need the ability to increase storage space available in oVirt data domains without increasing the number of LUNs presented to it.
A storage admin resizes a LUN using some administrative tool. (This is out of our scope) The oVirt admin will be able to perform a UI action on specific LUNs in a storage domain so that the new size will be refreshed.
The engine will send to all hosts in Data Center a "GetDeviceList" command with the required LUNs only. If all hosts return the same size, the engine will send to SPM a "resize PV" command. The DB will be updated with new sizes if needed. In the case when a host was in maintenance or not reachable when this operation has been performed, the host will rescan and resize the LUNs as part of the Connect Storage Server verb. The Connect Storage Server verb is called in engine command InitVdsOnUpCommand whenever a host comes back from a non up state.
In the "Edit Domain" window, a new column "Additional Size" will be available. If the LUN can be expanded , a toggle button with the additional size available will appear in the column. The user can choose to select the button on the LUN he wants to refresh and then click OK.
The following verbs will be added: * Resize PV
input : a single LUN GUID
output : size of PV
action : call pvresize and return the size of the PV
The following verb will be updated: * Get Device List - Rescan and resize of devices will be added
- Additional fields will be added:
Capacity of path in the path status section
Size of PV
Connect Storage server
Rescan and resize of devices will be added
A new command will be added:
input : a list of LUN GUIDs
output : status of operation
action : send to all hosts in Data Center a "getDeviceList" command with the epecific devices. If all hosts return the same size, the engine will send to SPM a "resize PV" command. The DB will be updated with new sizes if needed.
The user will able to perform LUN resize using the REST API of Storage Domain. A new action named "refresh_luns" will be added.
POST /api/storagedomains/zzz/refreshluns <action> <logical_units> <logical_unit id='xxx'/> <logical_unit id='yyy'/> </logical_units> </action>
What if the host used for getDeviceList do not see the new LUN size? Currently in Edit Domain , the "Use Host" is disabled and the user cannot choose a different one. Consider revisit Device Visibility command to check if all the hosts are aware of the same PV sizes.