| Posted | Nick | Remark | |
|---|---|---|---|
| #openstack-nova - 2018-01-04 | |||
| 15:05:23 | kashyap | Oh, didn't know of that thing | |
| 15:05:50 | kashyap | Why is it called 'legacy'? | |
| 15:06:01 | mriedem | because it existed before zuulv3 | |
| 15:06:07 | coreycb | jamespage: mriedem: do those patches enable sharable disks with qemu 2.10? 2.10 is what we have for pike/queens atm. | |
| 15:06:15 | mriedem | coreycb: yes | |
| 15:06:27 | mriedem | coreycb: and yeah, qemu 2.10 is precisely the problem | |
| 15:06:40 | kashyap | Okido, makes sense. | |
| 15:07:02 | mriedem | kashyap: i don't know if that apr job works, but i can propose that we run it on devstack experimental queue so i can see | |
| 15:07:28 | kashyap | mriedem: Yeah, I'm first looking at what's in there - git://git.openstack.org/openstack/devstack-plugin-additional-pkg-repos | |
| 15:08:55 | kashyap | Last updated 01-Apr-2016. | |
| 15:09:08 | kashyap | So at least it needs updates to the file: devstack/lib/libvirt | |
| 15:09:36 | kashyap | (To reflect correct versions.) | |
| 15:10:04 | hrw | uf. one patch, one bug. and then 3 other bugs for the same. ouch | |
| 15:10:25 | kashyap | hrw: What are the three other bugs? It's the same one we were talking about earlier, right | |
| 15:10:46 | mriedem | kashyap: oh hmm https://git.openstack.org/cgit/openstack/devstack-plugin-additional-pkg-repos/tree/devstack/lib/libvirt#n21 | |
| 15:10:50 | kashyap | hrw: I'm even surprised that OpenStack even works on AArch64 | |
| 15:10:54 | mriedem | pointing at liberty still yeah... | |
| 15:11:12 | kashyap | Yeah, the last Git commit should gave it away | |
| 15:11:26 | mriedem | kashyap: and i guess these versions for libvirt and qemu https://git.openstack.org/cgit/openstack/devstack-plugin-additional-pkg-repos/tree/devstack/lib/libvirt#n24 | |
| 15:11:45 | hrw | kashyap: https://bugs.launchpad.net/nova/+bug/1741230 was opened by me for my patch. Then found https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1673467 with some extra info. Then reported bug at upstream libvirt: https://bugzilla.redhat.com/show_bug.cgi?id=1531076 and got pointed to discussion in https://bugzilla.redhat.com/show_bug.cgi?id=1430987 one where again good info is provided. | |
| 15:11:47 | openstack | Launchpad bug 1741230 in OpenStack Compute (nova) "libvirt: use 'host-passthrough' as default on AArch64" [Undecided,In progress] - Assigned to Marcin Juszkiewicz (hrw) | |
| 15:11:48 | openstack | Launchpad bug 1673467 in OpenStack nova-compute charm "[ocata] unsupported configuration: CPU mode 'host-model' for aarch64 kvm domain on aarch64 host is not supported by hypervisor" [High,Fix released] - Assigned to James Page (james-page) | |
| 15:11:49 | openstack | bugzilla.redhat.com bug 1531076 in libvirt "Support 'host-model' on aarch64" [Unspecified,New] - Assigned to libvirt-maint | |
| 15:11:50 | openstack | bugzilla.redhat.com bug 1430987 in libvirt "No cpu model and feature in capabilities" [High,Assigned] - Assigned to abologna | |
| 15:11:59 | hrw | kashyap: we use OpenStack on AArch64 since Liberty ;D | |
| 15:12:16 | kashyap | hrw: Yeah, at this point, your getting traction on the upstream Bugzilla filed is the best bet. | |
| 15:12:48 | mriedem | looking at https://packages.ubuntu.com/search?suite=all§ion=all&arch=any&keywords=libvirt-bin&searchon=names | |
| 15:12:52 | hrw | kashyap: first edition of Linaro Developer Cloud was Liberty based. and then ~200 users/projects/companies used it. | |
| 15:12:53 | mriedem | ubuntu doesn't have a libvirt 3.10 yet | |
| 15:13:04 | kashyap | Even the UCA? | |
| 15:13:17 | hrw | kashyap: when Mitaka got released we migrated as it gave us UEFI support which simplified booting A LOT. | |
| 15:13:22 | mriedem | i assume Pike UCA is the latest, and that has libvirt 3.6 | |
| 15:13:26 | mriedem | same as bionic | |
| 15:13:34 | hrw | kashyap: then we migrated to Newton. | |
| 15:13:51 | hrw | kashyap: there are some testing deployments of Pike but we target Queens | |
| 15:13:54 | mriedem | same issue for qemu https://packages.ubuntu.com/search?suite=all§ion=all&arch=any&keywords=qemu-kvm&searchon=names | |
| 15:13:58 | mriedem | 2.10 is the latest in bionic | |
| 15:13:59 | mriedem | and pike UCA | |
| 15:13:59 | hrw | mriedem: there is Queens UCA | |
| 15:14:03 | mriedem | hrw: orly | |
| 15:14:15 | hrw | iirc | |
| 15:14:24 | hrw | http://ubuntu-cloud.archive.canonical.com/ubuntu/dists/xenial-updates/queens/ | |
| 15:14:57 | hrw | mriedem: but still libvirt 3.6.0 ;( | |
| 15:15:00 | kashyap | hrw: Okay. But meanwhile, my Aarch64 Mustang is remote, and I haven't accessed it in a while. If you get sometime, can you power your machine on (the one you talked about earlier in the day) & try? | |
| 15:15:23 | hrw | kashyap: I use xgene1 based HPe Moonshots | |
| 15:15:42 | hrw | kashyap: remotely as we have a bunch of those at Linaro lab | |
| 15:15:45 | mriedem | yup still 3.6 http://ubuntu-cloud.archive.canonical.com/ubuntu/dists/xenial-updates/queens/main/binary-amd64/Packages | |
| 15:15:49 | mriedem | so that doesn't help | |
| 15:16:07 | hrw | mriedem: make a PPA and grab libvirt from buster? | |
| 15:16:20 | kashyap | hrw: Are there any real users using OpenStack on AArch64, besides test / devel at Linaro? | |
| 15:16:29 | hrw | mriedem: that's what I did for Debian stable at Linaro | |
| 15:16:35 | hrw | kashyap: yes, they are | |
| 15:16:53 | hrw | kashyap: can not list names | |
| 15:17:11 | openstackgerrit | Eric Berglund proposed openstack/nova master: WIP: PowerVM Driver: vSCSI https://review.openstack.org/526094 | |
| 15:17:13 | hrw | kashyap: we provide VM instances as build slaves for several CI systems for example | |
| 15:17:13 | kashyap | No prob | |
| 15:17:46 | hrw | kashyap: also provided set of VMs as porter boxes for several projects | |
| 15:17:47 | kashyap | Nod | |
| 15:17:50 | mriedem | alternatively, i can push a devstack DNM patch which doesn't use the Pike UCA and we'll get qemu 2.5 | |
| 15:18:06 | kashyap | mriedem: You mean, just to exercise the relevant code for tests? | |
| 15:18:18 | mriedem | yes | |
| 15:18:56 | mriedem | even if jamespage / coreycb were able to backport those patches from 3.10 to 3.6 in the pike UCA, we'd have to put a workaround option in nova to bypass the version check and just run the multiattach code | |
| 15:18:59 | hrw | kashyap: the plan is to migrate all our cloud setups from our Newton to clean Queens. from set of venvs to containers | |
| 15:19:08 | mriedem | i.e. 'i've patched my packages, so don't care about the versions you think are required' | |
| 15:19:37 | hrw | mriedem: can not libvirt report that multiattach feature in domcapabilities or sth? | |
| 15:20:01 | kashyap | Yeah, I saw your version check code in that patch series | |
| 15:20:10 | hrw | mriedem: so instead "if libvirt >= x.y" you can use "if libvirt.capabilities.contains('multiattach')" | |
| 15:20:31 | mriedem | hrw: maybe? https://github.com/libvirt/libvirt/commit/860a3c4bea1d24773d8a495f213d5de3ac48a462 | |
| 15:20:40 | hrw | version check suxx when features are not enabled on all archs | |
| 15:20:53 | mriedem | is that how this would work with ^ and "disk-share-rw"? | |
| 15:21:49 | hrw | kashyap: so, can I get +2 from you on patch? ;D | |
| 15:21:59 | kashyap | hrw: I can't +2 | |
| 15:22:11 | kashyap | hrw: But I'd like someone else's opinion, too, like mriedem | |
| 15:22:18 | kashyap | Or mdrabe | |
| 15:22:21 | hrw | kashyap: or w8... I was supposed to do something with tests... no idea how to do that part | |
| 15:22:22 | kashyap | Err, mdbooth I mean | |
| 15:22:50 | mriedem | kashyap: can you tell me if https://github.com/libvirt/libvirt/commit/860a3c4bea1d24773d8a495f213d5de3ac48a462 is used to expose a hypervisor capability? | |
| 15:23:00 | mdbooth | kashyap: ? | |
| 15:23:01 | kashyap | hrw: I have one more comment on the change | |
| 15:23:08 | kashyap | Almost about to hit send | |
| 15:23:10 | mdbooth | Which change? | |
| 15:23:12 | mriedem | like in https://github.com/openstack/nova/blob/master/nova/virt/libvirt/host.py#L615 | |
| 15:23:12 | kashyap | mriedem: 1 sec, let me look | |
| 15:23:13 | hrw | mdbooth: https://review.openstack.org/#/c/530965/ | |
| 15:23:15 | kashyap | mdbooth: https://review.openstack.org/#/c/530965/4 | |
| 15:23:33 | kashyap | mdbooth: It's arch-specific, but migration-related, too. I noted the concern there | |
| 15:24:18 | mdbooth | kashyap: I don't have a useful opinion on that unfortunately without doing my own doc diving. | |
| 15:24:32 | kashyap | mdbooth: Okido, I have enough context there. Disregard | |
| 15:25:16 | hrw | mdbooth: imho https://bugzilla.redhat.com/show_bug.cgi?id=1430987 is best part of info on subject | |
| 15:25:17 | openstack | bugzilla.redhat.com bug 1430987 in libvirt "No cpu model and feature in capabilities" [High,Assigned] - Assigned to abologna | |
| 15:25:50 | kashyap | mriedem: Still checking | |
| 15:25:57 | hrw | kashyap: thx | |
| 15:29:27 | kashyap | mriedem: Hmm, I just built the newest libvirt-python bindings, and don't see it any of the capabilities; let me ask one of the libvirt folks | |
| 15:30:16 | kashyap | mriedem: So no -- it isn't exposed via any capabilities currently (like `virsh (dom)capablities`) | |
| 15:30:39 | kashyap | mriedem: So Peter (who wrote that commit says): | |
| 15:31:16 | kashyap | 16:29 < pkrempa> kashyap: it is not exposed currently, since it's supposed to be transparent for the users | |
| 15:31:19 | kashyap | 16:30 < pkrempa> and if it's not transparent I'd suggest to complain to qemu | |
| 15:31:38 | mriedem | kashyap: ok so we're stuck with version checks | |
| 15:31:40 | mriedem | thanks for asking | |
| 15:31:56 | mriedem | we could, as noted, add a workaround config option to bypass the version checks if you've patched your packages | |