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| 06:48.05 | mckoan | good morning |
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| 13:43.28 | JPEW | denix: I think there already are 20.04 images? |
| 13:45.34 | JPEW | denix: We don't really have plans for other distros besides ubuntu; the idea is to use a sanity tested distro in the container and Ubuntu seems to be one of the best fits. Is there some specific reason you would want something else? |
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| 15:01.24 | denix | JPEW: ok, "podman search garminpyrex" does show 20.04... I didn't see it earlier for some reason. Does pyrex default to 18.04 now? |
| 15:13.32 | JPEW | denix: Yes, it's defaulting to 18.04 |
| 15:13.45 | JPEW | I should update it now that 20.04 is valid |
| 15:18.11 | denix | JPEW: during last happy hour (btw, we missed you!) we were discussing containers and the fact that people are moving from docker to podman. I recently started using podmad on my new builder... |
| 15:20.42 | denix | JPEW: so, my new builder has ~2x faster CPU, ~3x faster disk IO and yet, it builds OE ~3x slower in a container than the old bare-metal builder - is that expected? I'd imagine a VM would even be faster... |
| 15:23.43 | JPEW | denix: Podman can have pretty slow I/O |
| 15:23.54 | JPEW | denix: I would be curious if you see the same with docker |
| 15:25.15 | JPEW | denix: https://github.com/garmin/pyrex/pull/61 |
| 15:25.20 | denix | JPEW: yeah, I was guessing the same and was wondering if there's a way to fine tune it... |
| 15:26.37 | JPEW | denix: Possibly. IIRC the problem is how it deals with --bind mounts... it might be emulating them with FUSE |
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| 15:28.11 | denix | JPEW: I believe it does - it installed fuse, actually it replaced standard ubuntu fuse with its own from podman repo |
| 15:29.35 | smurray | that seems odd vs just using mount binding? |
| 15:30.05 | JPEW | denix: Ya. I know it uses fuse-overlayfs for the main root file system in the container. That's probably slow, but ideally most of the file I/O is in the bind mounted workdir volume. I'm not sure how it deals with the bind mount |
| 15:30.40 | JPEW | smurray: Right; I'm not sure if it can actually do a bind mount. It's a little tricky because it's rootless |
| 15:31.24 | JPEW | Which is why the comparison to docker would be helpful since I *know* docker does the bind mount |
| 15:34.06 | smurray | JPEW: ah, I'd figured there'd still be root involved in there somewhere |
| 15:35.53 | denix | smurray: you can "sudo podman" if you want (don't know if it'd change from fuse to bind then) but normally it's daemonless and rootless |
| 15:38.51 | denix | it is one of the selling points though - anyone can run podman and don't need root or a daemon and it's more secure, as compromised user account won't gain root |
| 15:39.50 | smurray | I knew it was daemon-less, hadn't realized rootless was fully supported and not involving hackery |
| 15:47.26 | JaMa | was using unprivileged LXC few years ago (before docker became so popular) and the performance was close to bare-metal |
| 15:54.18 | denix | JaMa: interesting. do you know what it was using on the backend? |
| 15:56.05 | JaMa | from my notes it looks like just bind (but don't know how it was implemented internally) lxc.mount.entry = /mnt/mirror mnt/mirror none bind,create=dir |
| 15:57.06 | JaMa | https://stgraber.org/2013/12/20/lxc-1-0-blog-post-series/ was what I was reading back then |
| 15:58.41 | JaMa | it was building images with dizzy in less than 2 hours :) |
| 15:58.58 | JaMa | good old days |
| 16:06.52 | denix | heh :) |
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| 17:28.58 | denix | JPEW, smurray: came across this - https://news.ycombinator.com/item?id=25169423 |
| 17:30.53 | JPEW | denix: Ya |
| 17:31.51 | JPEW | I had to stop using podman because of the fd limit (although pyrex will automatically bump up the limit to the max hardlimit before running podman) |
| 17:33.16 | JPEW | Although sufficiently new fuse-overlayfs will do this also: https://github.com/containers/fuse-overlayfs/commit/d3729baa932bae444586ce9343bae59147ab2efb |
| 17:34.29 | denix | yeah, I haven't had fd limit issue |
| 17:34.53 | denix | but it is still slow and that post kind of explains the reasons |
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