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| kata-irc-bot | <xu> I planned to have cups of beer with the guys in the picture, however, I went to hospital because of fever unfortunately:,'( | 05:41 |
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| kata-irc-bot | <zhangwei555> @xu You missed the GREAT beer and food! :grinning: | 09:38 |
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| darix | moin, just wondering ... can I boot a different kernel than the host kernel with kata? | 17:19 |
| kata-irc-bot | <graham.whaley> hi @darix - that is pretty much what always happens. | 17:22 |
| kata-irc-bot | <graham.whaley> kata has a kernel image optimised to run containers in, so generally does not use the host kernel image. | 17:23 |
| kata-irc-bot | <graham.whaley> and, you can even have different kernels on a per-container or per-pod basis (I think that may only be per-pod in k8s, not sure if we support this feature in docker, as there may be no way to have docker tell kata - that is, no place to configure it on a per-container basis in docker). | 17:23 |
| kata-irc-bot | <graham.whaley> hey, @eric.ernst speaking of docs - I'm not sure we actually document the multi-kernel ability anywhere obvious btw ;) | 17:24 |
| kata-irc-bot | <eric.ernst> another GitHub issue for me to popen. | 17:24 |
| kata-irc-bot | <graham.whaley> I may have opened one, some time back... have a quick check first | 17:25 |
| darix | so that means if we want to implement k8s support for the open buildservice, we could use kata to get the native kernel of each distro for our build environments. cool | 17:26 |
| darix | the native distro kernel is needed to have matching syscalls in kernel and glibc (among other things) | 17:27 |
| darix | (specifically obs-worker support for k8s) | 17:30 |
| kata-irc-bot | <eric.ernst> You're looking to leverage Kata as a way to test container on particular kernels (which are based off of various distros you want to test); is that right? | 17:30 |
| darix | no | 17:31 |
| darix | currently for larger installations like https://build.opensuse.org/ we run a obs-worker daemon per machine that then spawns VMs to process build jobs. | 17:31 |
| darix | (per hardware machine that is) | 17:32 |
| darix | if you want to have everything running in containers we have the issue that the glibc of a distro doesnt match the host kernel of the container runtime. | 17:32 |
| darix | that's also why each of our build VMs runs with the distro specific kernel | 17:33 |
| darix | with kata we could start the containers with the right kernel to run the build jobs | 17:33 |
| darix | so maybe in the long run we can build your kata packages on kata containers :) | 17:33 |
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| darix | do we have a number for the "document multi kernel support" ticket? | 17:34 |
| kata-irc-bot | <graham.whaley> @darix - in the meantime, if you were only running one container on a machine at a time, you could 'hack' it and swap the kernel that the kata config file is pointing at... (in fact, you could probably do that between 'runs' and still have active containers running, as long as you don't try to launch a container whilst doing the edit). | 17:36 |
| kata-irc-bot | <graham.whaley> let me see if we do have an Issue or any docs on this already | 17:36 |
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| kata-irc-bot | <raravena80> @darix sounds like a great use case. | 17:37 |
| darix | I wonder how much work it would be to hook up kata containers with plain "osc build" first | 17:38 |
| kata-irc-bot | <graham.whaley> @darix @eric.ernst - heh, well, I didn't find any current docs or Issues. I did find my entry in my WIP wiki UserGuide is .... completely empty ;) | 17:39 |
| kata-irc-bot | <graham.whaley> https://github.com/kata-containers/documentation/wiki/UserGuide#kernel-per-pod | 17:39 |
| kata-irc-bot | <graham.whaley> Now, iirc, did @samuel.ortiz do an ascii video thing showing how to do kernel-per-pod - if we can start with that link... that might help? | 17:39 |
| darix | for "osc build" i would need something like: podman run -t -i --rm --net=none --rootfs $PWD bash | 17:39 |
| kata-irc-bot | <graham.whaley> aha! - found my Issue https://github.com/kata-containers/documentation/issues/294 @eric.ernst @darix | 17:40 |
| darix | and where is the ascii art movie? | 17:41 |
| darix | I will get popcorn | 17:41 |
| kata-irc-bot | <graham.whaley> think I found it ... https://asciinema.org/a/146888 | 17:42 |
| kata-irc-bot | <graham.whaley> I'll stick it on the ticket | 17:42 |
| kata-irc-bot | <graham.whaley> ;) Happy Friday! | 17:42 |
| kata-irc-bot | <graham.whaley> wow, that was Clear Containers.... let's see if that carried over to kata.... | 17:44 |
| darix | we are at a basic discussion atm ... so having this as an example is good enough | 17:44 |
| kata-irc-bot | <graham.whaley> If it has bitrotted, then it is a feature I believe we want to support in Kata, so it would be revived is my expectation... | 17:45 |
| kata-irc-bot | <eric.ernst> it is | 17:45 |
| kata-irc-bot | <eric.ernst> @eric.adams has a demo of it that he uses at conf afaiu | 17:46 |
| kata-irc-bot | <graham.whaley> nice. btw, I bet we don't test it in the CIs .... | 17:46 |
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