| Posted | Nick | Remark | |
|---|---|---|---|
| #openstack-nova - 2021-07-07 | |||
| 09:33:52 | sean-k-mooney[m] | today the port exits on the source and dest for a period of time its just shorter | |
| 09:34:10 | ralonsoh | sean-k-mooney[m], in OVN we don't have, for example, the concept of multiple port binding | |
| 09:34:23 | ralonsoh | and could be difficult to introduce it | |
| 09:35:03 | ralonsoh | could be possible, just an idea, to monitor this multiple port binding | |
| 09:35:16 | ralonsoh | and provide routing for the older one | |
| 09:35:28 | ralonsoh | when the scr port is deleted, the destination port will prevail | |
| 09:35:41 | ralonsoh | this will also prevent errors if the migration fails | |
| 09:35:47 | ralonsoh | anyway, this is not supported | |
| 09:37:28 | sean-k-mooney[m] | this is not related to multiple port bindings | |
| 09:37:46 | ralonsoh | I was making a parallelism | |
| 09:37:46 | sean-k-mooney[m] | this willl happen with just libvirt and ovn without openstack | |
| 09:37:51 | ralonsoh | with OVN backend | |
| 09:38:12 | ralonsoh | this is what OVN should support or something similar | |
| 09:38:30 | sean-k-mooney[m] | ovn needs to monitor the packets | |
| 09:38:47 | ralonsoh | what for? | |
| 09:38:53 | sean-k-mooney[m] | and when it receives new packets on the dest host swap that to to the primary port | |
| 09:39:13 | ralonsoh | could be an idea yes | |
| 09:39:18 | sean-k-mooney[m] | basically if need to activate the dest port when it receives the mac learning RARP packets | |
| 09:39:25 | ralonsoh | but should be aware of the multiple port locations | |
| 09:39:32 | sean-k-mooney[m] | yes | |
| 09:39:42 | ralonsoh | in any case, this is very similar to what we have now | |
| 09:39:58 | sean-k-mooney[m] | anyway in post-copy mode the vm today is potentially in this state for several minutes | |
| 09:40:03 | ralonsoh | that means OVN will configure the backend when the VM is unpaused | |
| 09:40:07 | sean-k-mooney[m] | so this is not new to this spec | |
| 09:40:53 | ralonsoh | in any case, I didn't think about this problem | |
| 09:41:21 | ralonsoh | and now I don't see what's the benefit using this feature | |
| 09:41:38 | sean-k-mooney[m] | ya but its not related to any of the change we are making and it happens already today without them so while we should bring it up with the ovn team | |
| 09:41:48 | sean-k-mooney[m] | its not a blocker for this change | |
| 09:42:16 | ralonsoh | but it is a relevant OVN behavior change we need to document in the spec | |
| 09:42:26 | sean-k-mooney[m] | its not | |
| 09:42:32 | sean-k-mooney[m] | this already happens today | |
| 09:42:54 | sean-k-mooney[m] | so its not a behaviour change | |
| 09:43:01 | ralonsoh | right | |
| 09:43:20 | ralonsoh | in any case, to make this work properly, we need this OVN change | |
| 09:43:26 | ralonsoh | of course | |
| 09:43:32 | ralonsoh | the feature is still valid | |
| 09:43:35 | ralonsoh | and the spec | |
| 09:43:57 | sean-k-mooney[m] | perhaps. if ovn is installing teh correct flows on the dest in this sate | |
| 09:44:11 | sean-k-mooney[m] | then the only issue we have is with packets getting sent to the vm right | |
| 09:44:34 | ralonsoh | yes | |
| 09:44:42 | sean-k-mooney[m] | ovn proably should be mirroring the packet flow to both ports | |
| 09:45:09 | ralonsoh | let me ask again: how much time could it take to copy the VM to dest? | |
| 09:45:20 | sean-k-mooney[m] | multiple minutes | |
| 09:45:40 | ralonsoh | so we can have this network disconnection time, right? | |
| 09:46:00 | sean-k-mooney[m] | with ml2 ovs it wont have downtime | |
| 09:46:13 | sean-k-mooney[m] | the mac learning packets fix this issue | |
| 09:46:19 | sean-k-mooney[m] | i’m not sure how ovn will work | |
| 09:47:14 | ralonsoh | OVN will block any traffic from src port | |
| 09:47:25 | ralonsoh | because the port_binding is changed | |
| 09:47:44 | sean-k-mooney[m] | that is ok | |
| 09:48:10 | sean-k-mooney[m] | i assume it is blocking packets form the dest until the port binding is activated on the dest | |
| 09:48:49 | ralonsoh | do you have 5 mins via meet? | |
| 09:48:53 | ralonsoh | or this afternoon | |
| 09:49:00 | ralonsoh | whenever you can | |
| 09:49:14 | sean-k-mooney[m] | are you free at the top of the hour | |
| 09:49:25 | ralonsoh | yes | |
| 09:49:33 | sean-k-mooney[m] | i was just going to grab coffee but i’m free then | |
| 09:49:33 | ralonsoh | ping me then | |
| 09:49:37 | ralonsoh | perfect | |
| 09:56:20 | opendevreview | Lee Yarwood proposed openstack/nova master: zuul: Add CentOS 8 stream integrated compute tempest job to gate https://review.opendev.org/c/openstack/nova/+/797616 | |
| 10:03:23 | sean-k-mooney | ralonsoh: https:/meet.google.com/izr-tezp-qab whenever you are free | |
| 10:56:26 | opendevreview | Stephen Finucane proposed openstack/nova master: Remove the redundant code for attach interface https://review.opendev.org/c/openstack/nova/+/796208 | |
| 10:56:37 | opendevreview | Merged openstack/os-traits master: setup.cfg: Replace dashes with underscores https://review.opendev.org/c/openstack/os-traits/+/791133 | |
| 11:36:15 | viks_ | hi, suppose if i have a preconfigured physical system which already have an os installed, can i make it as a openstack instance so that i can control that machine... i.e. assign an ip via neutron, boot, shutdown, restart, inject ssh etc ? | |
| 11:40:30 | lyarwood | viks_: https://docs.openstack.org/ironic/latest/ | |
| 11:43:57 | viks_ | lyarwood: Thanks... but In ironic it installs OS on the given baremetal... but i do not need to install anything, just add a machine and control it... | |
| 11:45:03 | lyarwood | viks_: https://docs.openstack.org/ironic/latest/admin/adoption.html I thought it didn't need to do that? | |
| 11:46:37 | viks_ | lyarwood: ok.. thanks... i'll check.. i have not gone through it before... | |
| 12:18:39 | opendevreview | Merged openstack/nova master: [ironic] Minimize window for a resource provider to be lost https://review.opendev.org/c/openstack/nova/+/799327 | |
| 12:48:33 | opendevreview | Lee Yarwood proposed openstack/nova-specs master: Store and allow libvirt instance device buses and models to be updated https://review.opendev.org/c/openstack/nova-specs/+/799811 | |
| 12:56:11 | lyarwood | Does anyone know of an API where we change the response for admins based on a microversion? | |
| 12:56:34 | lyarwood | Oh events, instance faults etc me-- | |
| 13:07:21 | ralonsoh | hi folks, do you know why if I have two compute node hosts (opentack host list) | |
| 13:07:32 | ralonsoh | I can't map the second one to cell1? | |
| 13:07:47 | ralonsoh | "nova-manage cell_v2 discover_hosts", then "nova-manage cell_v2 list_hosts" | |
| 13:07:52 | ralonsoh | +-----------+--------------------------------------+----------+ | |
| 13:07:53 | ralonsoh | +-----------+--------------------------------------+----------+ | |
| 13:07:53 | ralonsoh | | cell1 | db04030a-5cca-439d-b1c8-df1aa8d53d4f | u20ovn | | |
| 13:07:53 | ralonsoh | | Cell Name | Cell UUID | Hostname | | |
| 13:08:03 | ralonsoh | one is missing | |
| 13:09:10 | sean-k-mooney | you need to run discover hosts | |
| 13:09:20 | sean-k-mooney | nova-manage cellv2 discover_hosts | |
| 13:09:24 | ralonsoh | I did | |
| 13:09:44 | sean-k-mooney | from the controler | |
| 13:09:47 | ralonsoh | yes | |
| 13:10:04 | sean-k-mooney | can you run that with -v or --debug and past the output somewhere | |
| 13:10:09 | ralonsoh | let me check | |
| 13:11:26 | ralonsoh | sean-k-mooney, nothing, no output | |
| 13:12:06 | sean-k-mooney | does it show up in openstack hyperviors list | |
| 13:12:20 | ralonsoh | yes | |
| 13:12:30 | sean-k-mooney | the os-host api is deprecated by the way so im not sure it works proerly | |
| 13:12:35 | ralonsoh | | u20ovn | conductor | internal | | |
| 13:12:35 | ralonsoh | | u20ovn | scheduler | internal | | |
| 13:12:35 | ralonsoh | +-----------+-----------+----------+ | |
| 13:12:35 | ralonsoh | | Host Name | Service | Zone | | |
| 13:12:35 | ralonsoh | stack@u20ovn:/opt/stack$ openstack host list | |
| 13:12:37 | ralonsoh | | u20ovn | conductor | internal | | |
| 13:12:39 | ralonsoh | | u20ovn | compute | nova | | |
| 13:12:41 | ralonsoh | | u20ovn2 | compute | nova | | |
| 13:12:43 | ralonsoh | +-----------+-----------+----------+ | |