openstack/nova
Code Issues Proposed changes
52cc4bfa0a
nova/doc/source/admin/configuration/resize.rst
Takashi NATSUME 5fdcb2ca49 Remove wrong description for auto resize confirm 
Remove wrong description for auto resize confirm
in the API guide.
Move a description of a configuration option
'resize_confirm_window' from the API guide
to the admin configuration guide.
Add a description of automatic resize confirm
in the user guide.

Change-Id: If739877422d5743e221c57be53ed877475db0647
Closes-Bug: #1816859
2019-03-03 20:03:09 +00:00

1.4 KiB
Raw Blame History

Configure resize

Resize (or Server resize) is the ability to change the flavor of a server, thus allowing it to upscale or downscale according to user needs. For this feature to work properly, you might need to configure some underlying virt layers.

Virt drivers

This section needs to be updated for other virt drivers, shared storage considerations, etc.

KVM

Resize on KVM is implemented currently by transferring the images between compute nodes over ssh. For KVM you need hostnames to resolve properly and passwordless ssh access between your compute hosts. Direct access from one compute host to another is needed to copy the VM file across.

Cloud end users can find out how to resize a server by reading /user/resize.

XenServer

To get resize to work with XenServer (and XCP), you need to establish a root trust between all hypervisor nodes and provide an /image mount point to your hypervisors dom0.

Automatic confirm

There is a periodic task configured by configuration option :oslo.configresize_confirm_window (in seconds). If this value is not 0, the nova-compute service will check whether servers are in a resized state longer than the value of :oslo.configresize_confirm_window and if so will automatically confirm the resize of the servers.