https://github.com/Lillecarl/dinix I wrote a little thing that generates dinit (the init system) configuration from Nix (using the module system).

Dinit is VERY light, the overhead is ~4MB RAM and "no CPU". This enables writing OS and init independent "service collections". It can run as pid1 in Linux (but don't try this), pid1 in containers (reaps zombies and such) or random pid in user mode where it's just a process supervisor.

Also works on MacOS (I don't have a Mac machine so I can't verify though). So you could create a service collection with nginx, postgres, whatever and run it from a single nix command. You could even run dinit from a systemd unit if you'd want.

So you can run the same service collection from: Containers, Systemd, commandline and Nix brings the executables 😄

Here's an example nginx module that runs on 8080 and presents "Hello World" https://github.com/Lillecarl/dinix/blob/main/config.nix

Edit:

//github.com/lillecarl/dinix.git";}){}).config.out.script'```

https://github.com/Lillecarl/dinix I wrote a little thing that generates dinit (the init system) configuration from Nix (using the module system).

Dinit is VERY light, the overhead is ~4MB RAM and "no CPU". This enables writing OS and init independent "service collections". It can run as pid1 in Linux (but don't try this), pid1 in containers (reaps zombies and such) or random pid in user mode where it's just a process supervisor.

Also works on MacOS (I don't have a Mac machine so I can't verify though). So you could create a service collection with nginx, postgres, whatever and run it from a single nix command. You could even run dinit from a systemd unit if you'd want.

So you can run the same service collection from: Containers, Systemd, commandline and Nix brings the executables 😄

Here's an example nginx module that runs on 8080 and presents "Hello World" https://github.com/Lillecarl/dinix/blob/main/config.nix

Edit:

nix run --impure --expr '(import (builtins.fetchTree{type="git";url="https:
//github.com/lillecarl/dinix.git";}){}).config.out.script'

https://github.com/Lillecarl/dinix I wrote a little thing that generates dinit (the init system) configuration from Nix (using the module system).

Dinit is VERY light, the overhead is ~4MB RAM and "no CPU". This enables writing OS and init independent "service collections". It can run as pid1 in Linux (but don't try this), pid1 in containers (reaps zombies and such) or random pid in user mode where it's just a process supervisor.

Also works on MacOS (I don't have a Mac machine so I can't verify though). So you could create a service collection with nginx, postgres, whatever and run it from a single nix command. You could even run dinit from a systemd unit if you'd want.

So you can run the same service collection from: Containers, Systemd, commandline and Nix brings the executables 😄

Here's an example nginx module that runs on 8080 and presents "Hello World" https://github.com/Lillecarl/dinix/blob/main/config.nix

Edit:

nix run --impure --expr '(import (builtins.fetchTree{type="git";url="https://github.com/lillecarl/dinix.git";}){}).config.out.script'

In reply to @markuskowa:matrix.org
If the generation of config files would be reusable (I.e. separated in the module system), we could reuse them for dinix, or container image generation.

In reply to @kacper.uminski:matrix.org
Hi, all! I am currently trying to build a stateless cluster using Nixos. The main thing is that I want all things to be wiped on each boot. The idea is to have one management node serving an ipxe image over pxe, a kernel, and an initrd. The ipxe would pull the kernel and initrd, which would then torrent a root tarball, extract it, and kexec/switch_root into it. Does anyone have an idea where to even start with this? I did try nix-generators for the root kexec tarball, but that doesn't seem to work well when you already have a /nix in root already... Any suggestions would be most appreciated! :)

In reply to @markuskowa:matrix.org

https://github.com/markuskowa/nix-system/blob/master/modules%2Fkea.nix

Kacper Uminski: you can generate pxe capable image directly with nixos (see my example above)

In reply to @julienmalka:matrix.org
Maybe some simple stuff that could work is to setup syncthing on the nixos machine such that when it’s brought up it downloads P2P all the state of the machine

In reply to @kacper.uminski:matrix.org
Yes, I realize the idea is quite cursed. The main idea is to minimize stress on the control node, so a centralized cache or pxe server for the full filesystem is a no-no. All filesystems have to be reformatted on reboot, including /nix/store. We already have a setup like this working with Debian, but it's hacked together using shell-scripts, python, and preseed files. Hence I am investigating alternatives. :)