Hyper-V soft reboot

Hyper-V soft reboot

https://blueprints.launchpad.net/nova/+spec/hyper-v-soft-reboot

This blueprint introduces soft reboot support in the Nova Hyper-V driver.

Problem description

Currently both “nova reboot” and “nova reboot –hard” cause a hard reset on Hyper-V instances. The driver needs to perform a soft reboot in the former case for consistency with the API specifications.

Proposed change

This feature can be implemented by invoking the “InitiateShutdown” method of the “Msvm_ShutdownComponent” class, waiting for the VM to reach a powered off status and powering it on again.

For consistency with the libvirt driver, if a soft reboot fails then a hard reboot is attempted.

Hyper-V provides an API to execute a soft shutdown but not a direct API to execute a soft reboot, hence the need to wait for the shutdown to be completed.

Alternatives

None

Data model impact

None

REST API impact

None

Security impact

None

Notifications impact

None

Other end user impact

None

Performance Impact

None

Other deployer impact

None

Developer impact

None

Implementation

Assignee(s)

Primary assignee:

alexpilotti

Work Items

  • Hyper-V Nova driver feature implementation

  • Unit tests

Dependencies

None

Testing

  • Unit tests

  • Additional Tempest tests can be evaluated

Documentation Impact

None

References

Creative Commons Attribution 3.0 License

Except where otherwise noted, this document is licensed under Creative Commons Attribution 3.0 License. See all OpenStack Legal Documents.

nova-specs