What are good options for managing a non-Nix server? We have some Raspberry Pi's running Raspbian that I want to keep consistent. I know back in the day Ansible, Salt and Puppet were options... what should I consider these days?
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One option I'm considering is building an entire Pi image with Nix and just using that.
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I have a couple of PCs with a minimal Debian + single user Nix to allow it to run the same code as NixOS PCs. The Debian config doesn't change much (mostly just network). I build on NixOS, then use set one of the NixOS PCs as binary cache.
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All code is then bundled in a single derivation. From the Debian machine, updating is:
nix-store --extra-substituters http://my-nixos -r $STOREPATH --indirect --add-root ~/.my-env
But this is mostly for build and test tools etc, not daemons, which might be more what you're interested in.
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Another even dumber way doesn't require Nix on the remote machine:
nix-store --query --requisites "$STOREPATH"
Gives a list that can be rsynced to a remote host
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