048ee2db33
This blueprint proposes the introduction of Hyper-V serial console log support in the Nova Hyper-V compute driver bp hyper-v-console-log Change-Id: I20bff09f6d833d0d16dbfd4ccba30922525c9075
2.2 KiB
Hyper-V serial console log
https://blueprints.launchpad.net/nova/+spec/hyper-v-console-log
This blueprint introduces serial console log in the Nova Hyper-V driver.
Problem description
The Hyper-V driver is currently not providing a serial console log unlike other compute drivers (e.g. libvirt). This feature is particularly useful for the troubleshooting of both Linux and Windows instances.
Proposed change
Console log support in the Hyper-V nova driver will be obtained by implementing the "get_console_output" method inherited from nova.virt.driver.ComputeDriver.
Hyper-V supports virtual serial ports in the guests, which can be redirected to a dedicated named pipe on the host.
The driver will setup and connect the pipe upon starting or resuming a VM and closing it when stopping, suspending or live migrating.
Data read from the pipe will be written in a file placed in the instance directory, capped to a maximum size.
In case of live migration the console file must be moved to the destination server.
A call to "get_console_output" for a given instance will return the content of the file.
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:
-
petrutlucian94
- Other contributors:
-
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
- Initial discussion (Juno design summit): https://etherpad.openstack.org/p/nova-hyperv-juno