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changes.mady.by.user Marcus Sorensen

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Functionality was originally written for the KVM hypervisor, with focus on qcow2 and CLVM online resize. RBD support is planned. Initially Xen supports volume resize with VM shut down, tested with local storage, and we will need support from Xen developers who are more familiar with SR capabilities to enhance this.  VMware support was also submitted and applied. We will also need to see about any changes necessary for the upcoming storage refactor, the idea is we can get this in and it will give us a functionality basis to work off of for the refactor.

We need to create a matrix here describing which formats support what. KVM supports resize for CLVM (grow/shrink) and QCOW2 (grow) online, Xen SRs support offline grow/shrink, VMware supports online grow.

API implementation

The new call is 'resizeVolume', and the parameters are:

parameter

description

required

id

data volume id

true

size

new size in gigabytes (if custom disk offering)

false

diskofferingid

disk offering to migrate volume to (if not currently custom offering)

false

shrinkok

required boolean value, signing off confirmation on volume shrink (dangerous if admin doesn't know what they're doing)

false

 

XenServer

XS only support volume size grow

XS doesn't support volume size shrink