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5 Commits
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Author SHA1 Message Date
Jeremy Wall
0abd67a729
Merge pull request #8 from lucasbergman/nix-cleanup 
Nix cleanup
 2024-02-20 09:09:16 -05:00
Lucas Bergman
94b05b1437 maint: NixOS module writes config to the Nix store 
Instead of writing the config attrset to a YAML file to a fixed path in /etc,
this makes the NixOS module write to a (content-addressed) config file in the
Nix store. We just use builtins.toJSON since YAML is a superset of JSON.
 2024-02-20 07:58:03 -06:00
Lucas Bergman
668015ed17 maint: Some Nix flake cleanups 
Specifically:

  1. Switch from the nixosModule flake output (which is deprecated) to
     nixosModules.default
  2. Remove "with lib;" it's convenient, but I've gotten feedback when
     upstreaming module changes that that shouldn't be a thing in
     nixpkgs anymore
  3. Add a little type checking to the NixOS module options
  4. Switch the default config to empty (but leave the example)
  5. Use the convention "let cfg = config.services.heracles," a thing
     that's super common in NixOS
 2024-02-20 07:53:13 -06:00
Lucas Bergman
63b4f810c2 maint: Set formatter Nix flake output so nix fmt works 
I've idly thought about making the formatter a derivation that runs alejandra
over Nix code, then rustfmt over Rust code, etc--so that just running `nix
fmt` in the root cleans up everything--but I haven't made that work yet.
 2024-02-19 20:32:19 -06:00
Lucas Bergman
fe162968e5 maint: Run nix stuff through the formatter 
There are several choices for formatting Nix code, but IMHO alejandra is the
right kind of opinionated: <https://github.com/kamadorueda/alejandra>.
 2024-02-19 20:31:47 -06:00
2 changed files with 116 additions and 136 deletions
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19
default.nix
View File

@ -1,11 +1,12 @@
let
lock = builtins.fromJSON (builtins.readFile ./flake.lock);
lock = builtins.fromJSON (builtins.readFile ./flake.lock);
in
(import (
fetchTarball {
url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
sha256 = lock.nodes.flake-compat.locked.narHash;
}
) {
src = ./.;
}).defaultNix
(import (
fetchTarball {
url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
sha256 = lock.nodes.flake-compat.locked.narHash;
}
) {
src = ./.;
})
.defaultNix

233
flake.nix
View File

@ -6,147 +6,126 @@
inputs.nixpkgs.follows = "nixpkgs";
};
naersk.url = "github:nix-community/naersk";
flake-compat = { url = github:edolstra/flake-compat; flake = false; };
flake-utils.url = "github:numtide/flake-utils";
flake-compat = {
url = github:edolstra/flake-compat;
flake = false;
};
flake-utils.url = "github:numtide/flake-utils";
};
outputs = {nixpkgs, flake-utils, naersk, rust-overlay, ...}:
outputs = {
nixpkgs,
flake-utils,
naersk,
rust-overlay,
...
}:
flake-utils.lib.eachDefaultSystem (system: let
overlays = [
rust-overlay.overlays.default
];
pkgs = import nixpkgs { inherit system overlays; };
pkgs = import nixpkgs {inherit system overlays;};
rust-bin = pkgs.rust-bin.stable."1.71.0".default;
naersk-lib = pkgs.callPackage naersk {
rustc = rust-bin;
cargo = rust-bin;
rustc = rust-bin;
cargo = rust-bin;
};
heracles = naersk-lib.buildPackage {
name = "heracles";
verion = "0.0.1";
src = ./.;
nativeBuildInputs = [ pkgs.pkg-config ];
buildInputs = (
if pkgs.stdenv.isDarwin then
with pkgs.darwin.apple_sdk.frameworks; [ Security SystemConfiguration ]
else
[ pkgs.openssl ]) ++ [rust-bin];
name = "heracles";
verion = "0.0.1";
src = ./.;
nativeBuildInputs = [pkgs.pkg-config];
buildInputs =
(
if pkgs.stdenv.isDarwin
then with pkgs.darwin.apple_sdk.frameworks; [Security SystemConfiguration]
else [pkgs.openssl]
)
++ [rust-bin];
};
in
{
in {
packages.default = heracles;
}) // {
nixosModule = {config, pkgs, lib}: with lib; {
options = {
services.heracles.enable = mkEnableOption "enable heracles service";
services.heracles.listen = mkOption {
description = "[host]:port address for heracles to listen on";
default = "localhost:8080";
defaultText = "localhost:8080";
};
formatter = pkgs.alejandra;
})
// {
nixosModules.default = {
config,
pkgs,
lib,
}: {
options = {
services.heracles.enable = lib.mkEnableOption "enable heracles service";
services.heracles.listen = lib.mkOption {
description = "[host]:port address for heracles to listen on";
default = "localhost:8080";
defaultText = "localhost:8080";
type = lib.types.string;
};
services.heracles.settings = mkOption {
description = "heracles dashboard Configuration";
default = [
services.heracles.settings = lib.mkOption {
description = "heracles dashboard Configuration";
type = lib.types.listOf lib.types.attrs;
default = [];
defaultText = lib.literalExpression ''
[
{
title = "A dashboard";
graphs = [
{
title = "Graph title";
query_type = "Range";
# yaxis formatting default for this graph
d3_tick_format = "~s";
plots = [
{
title = "A dashboard";
graphs = [
{
title = "Graph title";
query_type = "Range";
# yaxis formatting default for this graph
d3_tick_format = "~s";
plots = [
{
source = "http://heimdall:9001";
query = ''
sum by (instance)(irate(node_cpu_seconds_total{job="nodestats"}[5m]))
'';
meta = {
name_function = "`\${labels.instance}`";
named_axis = "y";
# yaxis formatting for this subplot
d3_tick_format = "~s";
};
}
];
# span for this graph.
span = {
end = "now";
duration = "1d";
step_duration = "10min";
};
}
];
# default span for dashboard
span = {
end = "now";
duration = "1d";
step_duration = "10min";
};
source = "http://heimdall:9001";
query = \'\'
sum by (instance)(irate(node_cpu_seconds_total{job="nodestats"}[5m]))
\'\';
meta = {
name_function = "''${labels.instance}";
named_axis = "y";
# yaxis formatting for this subplot
d3_tick_format = "~s";
};
}
];
defaultText = ''
[
{
title = "A dashboard";
graphs = [
{
title = "Graph title";
query_type = "Range";
# yaxis formatting default for this graph
d3_tick_format = "~s";
plots = [
{
source = "http://heimdall:9001";
query = \'\'
sum by (instance)(irate(node_cpu_seconds_total{job="nodestats"}[5m]))
\'\';
meta = {
name_label = "instance";
name_prefix = "trace name prefix";
name_suffix = "trace name suffix";
named_axis = "y";
# yaxis formatting for this subplot
d3_tick_format = "~s";
};
}
];
# span for this graph.
span = {
end = "now";
duration = "1d";
step_duration = "10min";
};
}
];
# default span for dashboard
span = {
end = "now";
duration = "1d";
step_duration = "10min";
};
}
]
'';
};
};
config = mkIf config.services.heracles.enable {
environment.etc."heracles.yaml" = {
text = (generators.toYAML {} config.services.heracles.settings);
};
systemd.services.heracles = {
wantedBy = [ "multi-user.target" "default.target" ];
wants = [ "network.target" ];
after = [ "network-online.target" ];
serviceConfig = {
Restart = "on-failure";
RestartSec = "30s";
ExecStart = "${pkgs.heracles}/bin/heracles --listen ${config.services.heracles.listen} --config=${config.environment.etc."heracles.yaml".target}";
};
};
};
];
# span for this graph.
span = {
end = "now";
duration = "1d";
step_duration = "10min";
};
}
];
# default span for dashboard
span = {
end = "now";
duration = "1d";
step_duration = "10min";
};
}
]
'';
};
};
config = let
cfg = config.services.heracles;
cfgFile = pkgs.writeText "heracles.yaml" (builtins.toJSON cfg.settings);
in
lib.mkIf cfg.enable {
systemd.services.heracles = {
wantedBy = ["multi-user.target" "default.target"];
wants = ["network.target"];
after = ["network-online.target"];
serviceConfig = {
Restart = "on-failure";
RestartSec = "30s";
ExecStart = "${pkgs.heracles}/bin/heracles --listen ${cfg.listen} --config=${cfgFile}";
};
};
};
};
};
}