Wednesday, 2022-09-28

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RobertBerger@zwelch: I am not quite sure how you could add "post-deployment" a reliable SW update solution. "typically" you have 2 rootfs partitions - an active and a passive one and need to switch (via bootloader) from which to boot from05:54
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hrwzwelch: prepare kernel+initramfs which will: boot without touching rootfs, fetch new rootfs/kernel images, store them to device, reboot.10:26
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hrwzwelch: of course test it first and be ready to go and replace failed devices10:26
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LetoThe2ndzwelch: as I understood it, it is about a low-profile thiing that can at least be used to deploy application updates, without the partitioning thing.10:51
LetoThe2nderm RobertBerger ^^^^^^10:51
RobertBerger@LetoThe2nd even this might be tricky since it depends very much on the file system layout and the image types. e.g. you can not update files while they are used or you can not replace single files in a ramdisk10:58
LetoThe2ndRobertBerger: perfectly agreed. still better than nothing.11:00
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zwelchRobertBerger: "reliable" is an optional feature. Sure, bad things could happen during the upgrade, where only a solid A/B solution would save you.  But if the alternative is flying somewhere, taking a boat out to sea, pulling the equipment off a floating rig, returning to a workshop to upgrade it, and then redeploying it....  we should be willing to take some chances. Worst case: we have to do all of that anyway.16:46
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zwelchhrw: funnily enough, i already wrote a script that can pivot root into a ramdisk created from the running system, but that was for another platform where the next step (downloading and flashing a new image) got blocked and backlogged.  I can pull that out of the bit bucket and re-purpose it for this system. Thanks for reminding me.16:49
zwelchLetoThe2nd: am i correct in asserting that the mender application update process could be abused to update the entire system, simply by listing the entire rootfs in the files to include in the update?  Not saying that's a good idea, just curious how much that could be abused to handle updates to an entire dependency chain16:50
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armpitwas there a Happyhour reminder for today?16:55
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moto-timoJaMa:  I just like picking on you being quiet :) sibling teasing/trolling18:19
moto-timoarmpit: I sent the email and Josef posted to twitter and LinkedIn, but not on IRC.18:20
JaMa:)18:28
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LetoThe2ndzwelch: leaving out all replace-while-in-use complications and such, that is correct as I understand it. if you have such a pivot-mechanism somewhere, then mender could certainly be used to feed it.19:00
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denixjonmason: any word from Sumit? I guess you saw my reply? overall it's fine and builds, but naming/versioning is all over the place...19:47
jonmasondenix: I saw the response.  The naming is weird because Arm changed the naming methodology...again.  I didn't get a chance to read your response thoroughly yet, but I'm waiting on his response to pull his patches in19:48
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