10e8e5e44c
This blueprint implements improve-vmware-disk-usage. Change-Id: I6197a81084e494bc15d40cfe15fd6aed714f0107 Previously-approved: Juno
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2.4 KiB
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127 lines
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This work is licensed under a Creative Commons Attribution 3.0 Unported
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License.
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http://creativecommons.org/licenses/by/3.0/legalcode
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=============================
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VMware Ephemeral Disk Support
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=============================
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https://blueprints.launchpad.net/nova/+spec/improve-vmware-disk-usage
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The blueprint adds support for support ephemeral disks to the VMware driver.
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Problem description
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===================
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The VMware driver does not support ephemeral disks.
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Use Cases
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----------
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Driver parity. All virt driver should implement the same set of basic
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features (including ephemeral disks). So that when a user uses Nova
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they don't have to worry about which virt driver they are using if
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they are using basic features.
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Project Priority
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-----------------
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None
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Proposed change
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===============
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The change will add ephemeral disk support to the VMware driver. The commit
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acec2579b796d101f732916bfab557a66cebe512 added in a method create_virtual_disk.
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This method will be used to create the ephemeral disk for the instance.
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The method will create an ephemeral disk for the instance on the datastore.
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This will be done according to the size defined in the instance flavor.
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Alternatives
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------------
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* Do not implement the feature.
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Data model impact
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-----------------
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None.
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REST API impact
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---------------
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None.
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Security impact
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---------------
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None.
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Notifications impact
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--------------------
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None.
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Other end user impact
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---------------------
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* Users will be able to use ephemeral disks for the vCenter driver.
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Performance Impact
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------------------
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A modest increase in network traffic will slow down spawn operations as we
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create the ephemeral disk, size it, and place it for mounting in the vSphere
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virtual machine.
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Other deployer impact
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---------------------
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None.
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Developer impact
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----------------
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None.
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Implementation
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==============
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Assignee(s)
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-----------
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Primary assignee:
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garyk
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heut2008
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Work Items
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----------
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* refactor and port https://review.openstack.org/#/c/51793/ for Kilo
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Dependencies
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============
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blueprint vmware-spawn-refactor
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Testing
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=======
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* Minesweeper tests involving ephemeral disks will be turned on or written
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Documentation Impact
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====================
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After this blueprint the vmware driver will support ephemeral disks. This will
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need some additional documentation and changes to supported feature lists.
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References
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==========
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None
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