Re: [Openstack] Nova + LXD + Ceph?
Hi Torin On Tue, 13 Mar 2018 at 13:59 Torin Woltjer wrote: > Thank you for the response James. > > I now have a couple of further questions regarding boot volume support on > nova-lxd. > > Is this feature on the radar? > Not right now; I'm not entirely sure its even possible with LXD but I've not dug into this in huge detail to date. > On nova-kvm documentation states you need shared storage for live > migration; is this the same case with nova-lxd, or can you live migrate > between compute hosts when using a dir storage pool for root? > Its possible to block migrate as part of the live-migration process for libvirt/kvm; With regards to live migration in LXD - this is definitely an experimental feature right now; CRIU is improving all of the time and live-migration might just work for your workload but there are lots of common cases that probably don't. > Putting the host's LXD storage under a folder that a ceph pool is mounted > on, while an obvious sleight of hand, what would the repercussions be? > I think this is probably OK right now, but its not something I've personally tried as most of our validation for nova-lxd is based around 2.0.x series, which does not have support for storage pools + ceph. > > I don't know if anyone has answers to these, but any are welcome. I'm > assuming the feature I'm looking for relys on work from the nova project > rather than the LXD project; I will try to track down a nova features > timeline or submit a request myself. > nova-lxd is still a separate team and project: https://github.com/openstack/nova-lxd so its a little different to main Nova development right now; a bug report at: https://bugs.launchpad.net/nova-lxd is a good place to start! Cheers James ___ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
Re: [Openstack] Nova + LXD + Ceph?
Thank you for the response James. I now have a couple of further questions regarding boot volume support on nova-lxd. Is this feature on the radar? On nova-kvm documentation states you need shared storage for live migration; is this the same case with nova-lxd, or can you live migrate between compute hosts when using a dir storage pool for root? Putting the host's LXD storage under a folder that a ceph pool is mounted on, while an obvious sleight of hand, what would the repercussions be? I don't know if anyone has answers to these, but any are welcome. I'm assuming the feature I'm looking for relys on work from the nova project rather than the LXD project; I will try to track down a nova features timeline or submit a request myself. James, any documentation you can put together would be great and I look forward to seeing it. Thanks. From: James Page Sent: 3/13/18 5:33 AM To: torin.wolt...@granddial.com Cc: openstack@lists.openstack.org Subject: Re: [Openstack] Nova + LXD + Ceph? Hi Torin On Mon, 12 Mar 2018 at 21:52, Torin Woltjer wrote: Hello, I am looking to deploy an openstack cluster using LXD for compute and Ceph for storage, and I was running into some doubt as to whether this was possible; and doubt that nova-lxd was mature enough for production. If anyone is running nova-lxd in production, or knows anything about it, please let me know. I've had a hard time finding good informational resources on the topic, specifically relating to LXD + Ceph; which is supposedly possible, but I haven't heard if it's possible in Openstack. If you otherwise know of a resource that could be helpful to me, I would appreciate hearing it. Short answer is that nova-lxd does support use with Ceph, but only for additional block devices (I.e no boot from volume or ephemeral device support right now). You have highlighted a documentation gap - there are a few non obvious things todo like ensuring that cinder creates RBD devices with a minimal feature set to support use the the kRBD driver used for nova-lxd. Will look to put a howto for ceph in place shortly! Cheers James ___ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
Re: [Openstack] Nova + LXD + Ceph?
Hi Torin On Mon, 12 Mar 2018 at 21:52, Torin Woltjer wrote: > Hello, > > I am looking to deploy an openstack cluster using LXD for compute and Ceph > for storage, and I was running into some doubt as to whether this was > possible; and doubt that nova-lxd was mature enough for production. If > anyone is running nova-lxd in production, or knows anything about it, > please let me know. I've had a hard time finding good informational > resources on the topic, specifically relating to LXD + Ceph; which is > supposedly possible, but I haven't heard if it's possible in Openstack. If > you otherwise know of a resource that could be helpful to me, I would > appreciate hearing it. > Short answer is that nova-lxd does support use with Ceph, but only for additional block devices (I.e no boot from volume or ephemeral device support right now). You have highlighted a documentation gap - there are a few non obvious things todo like ensuring that cinder creates RBD devices with a minimal feature set to support use the the kRBD driver used for nova-lxd. Will look to put a howto for ceph in place shortly! Cheers James ___ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
