Resizing Instance

Resizing Instance in OpenStack

In OpenStack there are two ways to resize an Instance,



i) Resize instance on the same compute node

ii) Resize instance on the other compute node

i) Resize instance on the same compute node

Normally, While resizing an instance Nova will try to contact other compute node for does resize. But our use case is resize instance on the same compute node. So enable resize on the same compute node by adding the following line in the nova.conf file

allow_resize_to_same_host = true

then restart the nova-api service as follows,

service nova-api restart

refer the following screenshots to resize an instance on the same host

Choose Resize Instance
Select a new flavor for resize
Confirm Resize

Now resize instance on same compute node is done.


ii) Resize instance on the other compute node

To resize instance on the other compute node, the passwordless authentication should be configured between the compute nodes.

After configuring passwordless authentication, follow the above steps followed for Resize instance on the same compute node

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