On Sat, Oct 18, 2014 at 10:04 AM, Roman Bogorodskiy < rbogorods...@mirantis.com> wrote:
> Hi, > > In discussion of this spec proposal: > https://review.openstack.org/#/c/127827/ it was suggested by Joe Gordon > to start a discussion on the mailing list. > > So I'll share my thoughts and a long term plan on adding FreeBSD host > support for OpenStack. > > An ultimate goal is to allow using libvirt/bhyve as a compute driver. > However, I think it would be reasonable to start with libvirt/qemu > support first as it will allow to prepare the ground. > Before diving into the technical details below, I have one question. Why, What is the benefit of this, besides the obvious 'we not support FreeBSD'? Adding support for a new kernel introduces yet another column in our support matrix, and will require a long term commitment to testing and maintaining OpenStack on FreeBSD. > > High level overview of what needs to be done: > > - Nova > * linux_net needs to be re-factored to allow to plug in FreeBSD > support (that's what the spec linked above is about) > * nova.virt.disk.mount needs to be extended to support FreeBSD's > mdconfig(8) in a similar way to Linux's losetup > - Glance and Keystone > These components are fairly free of system specifics. Most likely > they will require some small fixes like e.g. I made for Glance > https://review.openstack.org/#/c/94100/ > - Cinder > I didn't look close at Cinder from a porting perspective, tbh. > Obviously, it'll need some backend driver that would work on > FreeBSD, e.g. ZFS. I've seen some patches floating around for ZFS > though. Also, I think it'll need an implementation of iSCSI stack > on FreeBSD, because it has its own stack, not stgt. On the other > hand, Cinder is not required for a minimal installation and that > could be done after adding support of the other components. > What about neutron? We are in the process of trying to deprecate nova-network, so any new thing needs to support neutron. > > Also, it's worth to mention that a discussion on this topic already > happened on this maillist: > > http://lists.openstack.org/pipermail/openstack-dev/2014-March/031431.html > > Some of the limitations were resolved since then, specifically, > libvirt/bhyve has no limitation on count of disk and ethernet devices > anymore. > > Roman Bogorodskiy >
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