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Colmena

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A simple, stateless NixOS deployment tool - https://github.com/zhaofengli/colmena111 Servers

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30 Jul 2022
@winterqt:nixos.devWinter (she/her)I'm wondering if we can construct a builders argument with the data from the machines that have buildOnTarget set as well07:03:29
@winterqt:nixos.devWinter (she/her)To transparently handle that IFD case07:03:38
@winterqt:nixos.devWinter (she/her)Without manual configuration ahead of time07:03:44
@zhaofeng:zhaofeng.liZhaofeng Li Yeah, it could work pretty well combined with the recent --eval-store suggestion. 07:06:10
@zhaofeng:zhaofeng.liZhaofeng LiThe next step is to perform the actual evaluation remotely, but we aren't there yet.07:06:55
@winterqt:nixos.devWinter (she/her)
In reply to @zhaofeng:zhaofeng.li
Yeah, it could work pretty well combined with the recent --eval-store suggestion.
Yeah, I did see that. Is that suggesting using the target machine as the store for eval with that flag? I'm pretty sure that's what they're suggesting, but the "local --eval-store" part is throwing me off.
07:14:49
@zhaofeng:zhaofeng.liZhaofeng LiYeah, it's a bit confusing but I think that's what they meant.07:15:59
@zhaofeng:zhaofeng.liZhaofeng Li
In reply to @zhaofeng:zhaofeng.li
Ah, good catch! We should make it passthrough so it should work for other goals.
Ok, just tested, and the colmena apply-local --sudo test goal works as it currently stands. The interactive prompts of sudo don't use stdin/out.
07:26:53
@winterqt:nixos.devWinter (she/her)Oh, huh, they... don't?07:42:55
@winterqt:nixos.devWinter (she/her)Interesting!07:43:09
@winterqt:nixos.devWinter (she/her) Although, keep in mind that other privilege escalation commands (doas comes to mind) may not give us that luxury. 07:43:33
@zhaofeng:zhaofeng.liZhaofeng LiI would assume it's the same, otherwise it won't play well with pipes and be insecure07:44:33
@winterqt:nixos.devWinter (she/her)Oh, fair point.08:03:05
@winterqt:nixos.devWinter (she/her) What even is there to use other than stdin/stdout in a console, though? ~~This is obviously magic.~~ 08:03:36
@winterqt:nixos.devWinter (she/her)I'll look into it later, I'm intrigued.08:03:44
@winterqt:nixos.devWinter (she/her) Zhaofeng Li: That begs the question: why passthrough the profile switch execution, then? Were you under the assumption that it would be needed for ? 08:04:30
@zhaofeng:zhaofeng.liZhaofeng Li
In reply to @winterqt:nixos.dev
What even is there to use other than stdin/stdout in a console, though? ~~This is obviously magic.~~
IIRC it uses /dev/console. There is a flag to make sudo use stdin though
08:06:51
@zhaofeng:zhaofeng.liZhaofeng Li
In reply to @winterqt:nixos.dev
Zhaofeng Li: That begs the question: why passthrough the profile switch execution, then? Were you under the assumption that it would be needed for ?
No, it was from way before apply-local was changed to escalate privileges during activation. passthrough() is just a simple way to execute commands with both stdin/stdout piped
08:08:27
@zhaofeng:zhaofeng.liZhaofeng Li
In reply to @winterqt:nixos.dev
What even is there to use other than stdin/stdout in a console, though? ~~This is obviously magic.~~
* IIRC it uses /dev/console. There is a flag to make sudo use stdin though (edit: it's -S)
08:10:23
@winterqt:nixos.devWinter (she/her)
In reply to @zhaofeng:zhaofeng.li
No, it was from way before apply-local was changed to escalate privileges during activation. passthrough() is just a simple way to execute commands with both stdin/stdout piped
Why was it needed for the profile switch, out of curiosity?
08:12:58
@zhaofeng:zhaofeng.liZhaofeng Li
In reply to @winterqt:nixos.dev
Why was it needed for the profile switch, out of curiosity?
It was one of the four custom methods that I have to "execute" the command and get back a ColmenaResult. It's just a simple version of Command::status() which needs two layers of checking (the outer Result and the exit code).
08:22:44
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4 Aug 2022
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6 Aug 2022
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7 Aug 2022
@swissrouting:matrix.orgSwiss RoutingIs there any way to do a healthcheck with colmena? I see some other deployment tools support this. All I want to do is make sure that if I push a new config that disables SSH access accidentally, this is caught and rolled back.15:37:30
@dantefromhell:matrix.orgdantefromhell
In reply to @swissrouting:matrix.org
Is there any way to do a healthcheck with colmena? I see some other deployment tools support this. All I want to do is make sure that if I push a new config that disables SSH access accidentally, this is caught and rolled back.
i'm curious if tests as described here suffice your requirement?
https://nixos.mayflower.consulting/blog/2019/07/11/leveraging-nixos-tests-in-your-project/
20:49:02
@swissrouting:matrix.orgSwiss Routing
In reply to @dantefromhell:matrix.org
i'm curious if tests as described here suffice your requirement?
https://nixos.mayflower.consulting/blog/2019/07/11/leveraging-nixos-tests-in-your-project/
That seems pretty much what I want, will give it a try. Thanks!
22:44:16
@winterqt:nixos.devWinter (she/her)
In reply to @dantefromhell:matrix.org
i'm curious if tests as described here suffice your requirement?
https://nixos.mayflower.consulting/blog/2019/07/11/leveraging-nixos-tests-in-your-project/
How would that help without a mechanism to run the test? (Also, tests are within VMs.)
23:25:19
@winterqt:nixos.devWinter (she/her)
In reply to @dantefromhell:matrix.org
i'm curious if tests as described here suffice your requirement?
https://nixos.mayflower.consulting/blog/2019/07/11/leveraging-nixos-tests-in-your-project/
* How would that help without a mechanism to run the test? (Also, tests are within VMs, and can't access the host.)
23:25:26
@winterqt:nixos.devWinter (she/her) * How would that help without a mechanism to run the test? (Also, tests are within VMs, and can't access the host. So tests probably aren't the solution here.) 23:25:37

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