Please support low latency kernels

[Barry Price]

MAAS 1.9 does not allow us to use any kernels beyond the regular HWE options

We'd specifically like to be able to use the linux-image-lowlatency and/or linux-image-lowlatency-lts-* kernels on amd64.

To reproduce, select any node in the Web UI, click Edit on the Machine Summary, and open the Minimum Kernel drop-down menu. No kernels other than the regular HWE images are listed.

$ dpkg -l '*maas*'|cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===========================================================-=====================================-============-===============================================================================
ii maas 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS server all-in-one metapackage
ii maas-cli 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS command line API tool
ii maas-cluster-controller 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS server cluster controller
ii maas-common 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS server common files
ii maas-dhcp 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS DHCP server
ii maas-dns 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS DNS server
ii maas-enlist 0.4+bzr38-0ubuntu1 amd64 MAAS enlistment tool
ii maas-proxy 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS Caching Proxy
ii maas-region-controller 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS server complete region controller
ii maas-region-controller-min 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS Server minimum region controller
ii python-django-maas 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS server Django web framework
ii python-maas-client 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS python API client
ii python-maas-provisioningserver 1.9.1+bzr4543-0ubuntu1~trusty1 all MAAS server provisioning libraries

[Andres Rodriguez (andreserl)]

Supporting low latency kernels is something we have in the roadmap but the roadmap has not yet been decided for 16.10. This may be a significant amount of work to support (or may not). Marking the bug appropriately.

Barry, could you please make sure this is raised by someone on your team at the cloud sprint or juju/Maas sprint?

Thanks!

[Lee Trager (ltrager)]

This will be part of our 2.1 release. The new kernels will be released into a new stream at http://images.maas.io/ephemeral-v3/daily/ If you're using the default stream this will be automatically. However if you are using a mirror you will have to start mirroring the new URL(not available yet) to get lowlatency kernels.