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| gregg10_ | Hello Everyone, just wondering if there is a way to run GUI applications within Kata containers? | 15:15 |
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| xzr | Hey, anyone running Kata on Atomic? Could use some tips on the setup | 15:31 |
| gwhaley | hi @gregg10_ - I don't think anybody has tried that to my knowledge - but, having a very quick search, it might be possible to run an X app inside and use XDISPLAY to route the output to the host (or other) X display server. You'll probably have to punch a bunch of holes through the network port mapping, and we don't (cannot) support '--net=host'. feel free to open an Issue on github repos for more discussion maybe? | 15:36 |
| gwhaley | @xzr - a quick search shows atomic is based on docker of docker/k8s, yes? In that case, I expect installing kata into the k8s atomic is using 'may just work'(tm) - but, I don't remember/know of anybody trying it ... if you do give it a spin and get stuck then we're here to try and understand and try to resolve any blockers etc :-) | 15:38 |
| xzr | gwhaley: for what I've understood so far it's pretty much rhel's version of coreos | 15:38 |
| xzr | with k8s/docker bundled in | 15:39 |
| xzr | I'll try some more tinkering tomorrow and see where I get | 15:40 |
| gwhaley | xzr: great. Note btw, there is normally a bot that relays this irc to the slack as well, but it is down at the minute - many folks may be on slack and not here at the moment, so you may wish to feed back to slack and particularly on github, to get coverage :-) | 15:41 |
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| xzr | cheers, I'll do that :p | 15:41 |
| xzr | google didn't really produce any results for the atomic+kata combo so might be slightly untreaded ground | 15:41 |
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| gwhaley | xzr: indeed, I think you may be breaking new ground :-) This might help for the k8s integration side: https://github.com/kata-containers/documentation/blob/master/how-to/how-to-use-k8s-with-cri-containerd-and-kata.md | 15:47 |
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| gregg10_ | @ghaley - thanks for information, i was trying with the DISPLAY environment path but no luck, keeps saying it can't open display :0.0... this process works with docker, but not with kata so far... i will open up an issue, thanks for the help! | 16:14 |
| gwhaley | gregg10_ - on docker, did you use --net=host or --privileged maybe - as that probably gets you the direct network access. On kata you will probably have to hand configure the port mapping on the docker run line - but, I don't know what ports (and/or how that is going to work if anything is ephemeral) etc. | 16:27 |
| gregg10_ | actually what I do for docker is bind mount /tmp/.X11-unix and allow xhost for all connections then export the DISPLAY environment variable in the container, and that seems to do the trick with all the GUI apps I have tried, one thing I noticed is that docker binds with tmpfs and kata mounts as type 9p | 16:32 |
| gwhaley | @gregg10_ - the problem you will have there I think is that that /tmp/.X11-unix dir on the host containers what I suspect are host local sockets - and as the kata container is running inside a VM, even if it can see those sockets, I suspect it cannot open/use them as they are not in 'its kernel' - basically, are on a different machine. So, my guess is you cannot use that same trick with kata - you will have to use real remote netwo | 16:36 |
| gwhaley | rk XDISPLAY with the IP addr of the host - just my guess. | 16:36 |
| gregg10_ | ok that makes sense, going to do some more research on XDISPLAY, appreciate the help! | 16:41 |
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