kurogeek
2edbab02cc
Volatile journald (64M), tmpfs /tmp, no core dumps, and noatime + commit=60 on the ext4 root so the small periodic writers (Kea leases, timesyncd clock, speedtest textfile) coalesce. Logs are kept in RAM rather than dropped: pppd/kea output is the main debugging tool on a gateway.
71 lines
2.5 KiB
Nix
71 lines
2.5 KiB
Nix
{
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config,
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inputs,
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lib,
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pkgs,
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...
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}:
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{
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imports = [
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inputs.matthew-hardware.nixosModules.mt7986a-glinet-gl-mt6000
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];
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# matthew-hardware's common/generic-uefi-image.nix still sets
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# `image.repart.enable = true`; nixpkgs removed that option (importing
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# image/repart.nix now always defines system.build.image). Declare it so the
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# definition has somewhere to land. Drop once upstream stops setting it.
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options.image.repart.enable = lib.mkOption {
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type = lib.types.bool;
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default = true;
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internal = true;
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};
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config = {
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hardware.mt7986a-glinet-gl-mt6000.enable = true;
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hardware.mt7986a-glinet-gl-mt6000.zealous = true;
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hardware.mt7986a-glinet-gl-mt6000.image.repart.enable = true;
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nixpkgs.hostPlatform.system = "aarch64-linux";
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nixpkgs.buildPlatform.system = "x86_64-linux";
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system.stateVersion = "26.11";
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clan.core.sops.defaultGroups = [ "admins" ];
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clan.core.settings.name = "stellio";
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clan.core.settings.machine.description = "Flint-2 router";
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# Root is ext4 on the Flint 2's eMMC: keep steady-state writes off it.
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# Logs live in RAM (64M; the router needs them for pppd/kea debugging,
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# unlike sirius which drops them), /tmp is tmpfs, no core dumps, and
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# ext4 skips atime updates and flushes its journal every 60 s instead
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# of 5 s so the small periodic writes (Kea leases, timesyncd clock,
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# speedtest textfile) coalesce. A power cut loses at most a minute of
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# that state, none of which matters on a gateway.
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fileSystems."/".options = [
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"noatime"
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"commit=60"
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];
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boot.tmp.useTmpfs = true;
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services.journald.settings.Journal = {
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Storage = "volatile";
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RuntimeMaxUse = "64M";
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};
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systemd.coredump.enable = false;
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# nixpkgs' services.blocky check runs the aarch64 blocky in a
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# system.checks derivation, which an x86_64 builder without binfmt cannot
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# execute (`--max-jobs 0` -> Exec format error). Validate the same YAML
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# with the build host's blocky instead. Drop once cnx-network's router
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# service carries this itself (router/dns: validate the Blocky config
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# with the build host's binary).
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services.blocky.enableConfigCheck = false;
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system.checks = [
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(pkgs.runCommand "check-blocky-config" { } ''
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${lib.getExe pkgs.buildPackages.blocky} --config ${
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(pkgs.formats.yaml { }).generate "blocky-config.yaml" config.services.blocky.settings
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} validate && touch $out
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'')
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];
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};
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}
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