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NixOS System Operations

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About system administration for running NixOS systems in production. Declaratively manage your operations. | Room recommendations: #networking:nixos.org171 Servers

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31 Oct 2024
@sophie:sophiecat.pwsophieif you're using Android, you can put the keys into an encrypted space with the encryption keys protected by the secure element too :) might be possible on iOS too but not tried that21:18:52
@elvishjerricco:matrix.orgElvishJerriccoyea, tough choice between storing a wrapped key on the disk vs storing a wrapped key on the phone21:20:40
@elvishjerricco:matrix.orgElvishJerriccodifferent tradeoffs between the two21:20:46
@sophie:sophiecat.pwsophiecould either use the stored key on the phone as the TPM2 pin or have the password be a combination of both keys21:22:15
@elvishjerricco:matrix.orgElvishJerriccoyea that's interesting21:23:17
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@scrumplex:duckhub.ioScrumplexIs there a way I can instruct Nix to prefer building locally over using remote builders? I am on a x86_64-linux machine and I have a x86_64-linux remote builder. Currently Nix seems to prefer the remote builder, even though I have more cores (and performance per core) locally. The speed factor of the builder is 114:56:44
@scrumplex:duckhub.ioScrumplex According to the documentation of nix.conf, the speed factor must be a positive integer, so I can't really do something like 0.5 14:57:09
@scrumplex:duckhub.ioScrumplex * According to the documentation of nix.conf, the speed factor must be a positive integer, so I can't set it to something like 0.5 14:57:15
@flare:matrix.darkc0de.oneflarebeen using nixos for 2 years now and have only now heard of nix.conf. if anyone has experience on this it would be interesting to see that response15:00:44
@k900:0upti.meK900
In reply to@flare:matrix.darkc0de.one
been using nixos for 2 years now and have only now heard of nix.conf. if anyone has experience on this it would be interesting to see that response
Uhh, what
15:00:58
@scrumplex:duckhub.ioScrumplex * According to the documentation of nix.conf, the speed factor must be a positive integer, so I can't set it to something like 0.5 15:01:18
@scrumplex:duckhub.ioScrumplex
In reply to @flare:matrix.darkc0de.one
been using nixos for 2 years now and have only now heard of nix.conf. if anyone has experience on this it would be interesting to see that response
I assume you have configured nix.conf just never directly. The options nix.settings.* will be used to generate /etc/nix/nix.conf on NixOS
15:02:32
@k900:0upti.meK900
In reply to@scrumplex:duckhub.io
Is there a way I can instruct Nix to prefer building locally over using remote builders? I am on a x86_64-linux machine and I have a x86_64-linux remote builder. Currently Nix seems to prefer the remote builder, even though I have more cores (and performance per core) locally. The speed factor of the builder is 1
speedFactor isn't even considered for local builds
15:02:39
@scrumplex:duckhub.ioScrumplex
In reply to @flare:matrix.darkc0de.one
been using nixos for 2 years now and have only now heard of nix.conf. if anyone has experience on this it would be interesting to see that response
* I assume you have configured nix.conf, just never directly. The options nix.settings.* will be used to generate /etc/nix/nix.conf on NixOS
15:02:42
@k900:0upti.meK900There's some weird heuristics15:02:53
@scrumplex:duckhub.ioScrumplex
In reply to @k900:0upti.me
speedFactor isn't even considered for local builds
I feared this would be the case
15:02:58
@scrumplex:duckhub.ioScrumplexI think my biggest wish for Nix would be more dynamic allocation of resources. It would be great if Nix could somehow "look-ahead" and dynamically allocate more cores to build jobs. Like let's say you are building a large closure and Nix will soon need to spend time building a single derivation that every remaining derivation depends on. It could just allocate all available cores to that derivation, while when building many derivations in parallel it could allocate a small amount of cores to not overwhelm the system15:06:57

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