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cluster/services/storage: provision garage keys with locksmith

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This commit is contained in:
Max Headroom 2024-07-10 22:31:57 +02:00
parent 1d59d4e4f6
commit d7f816ee39
1 changed files with 75 additions and 6 deletions
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81
cluster/services/storage/garage-options.nix
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@ -1,4 +1,4 @@
{ config, lib, pkgs, ... }:
{ config, depot, lib, pkgs, ... }:
let
cfg = config.services.garage;
@ -102,11 +102,37 @@ in
};
keys = mkOption {
type = with types; attrsOf (submodule {
options.allow = {
createBucket = mkOption {
description = "Allow the key to create new buckets.";
type = bool;
default = false;
options = {
allow = {
createBucket = mkOption {
description = "Allow the key to create new buckets.";
type = bool;
default = false;
};
};
locksmith = {
nodes = mkOption {
description = "Nodes that this key will be made available to via Locksmith.";
type = listOf str;
default = [];
};
format = mkOption {
description = "Locksmith secret format.";
type = enum [ "files" "aws" "envFile" ];
default = "files";
};
owner = mkOption {
type = str;
default = "root";
};
group = mkOption {
type = str;
default = "root";
};
mode = mkOption {
type = str;
default = "0400";
};
};
};
});
@ -237,5 +263,48 @@ in
'';
};
};
services.locksmith.providers.garage = {
wantedBy = [ "garage-apply.service" ];
after = [ "garage-apply.service" ];
secrets = lib.mkMerge (lib.mapAttrsToList (key: kCfg: let
common = {
inherit (kCfg.locksmith) mode owner group nodes;
};
getKeyID = "${cfg.package}/bin/garage key info ${lib.escapeShellArg key} | grep -m1 'Key ID:' | cut -d ' ' -f3";
getSecretKey = "${cfg.package}/bin/garage key info ${lib.escapeShellArg key} | grep -m1 'Secret key:' | cut -d ' ' -f3";
in if kCfg.locksmith.format == "files" then {
"${key}-id" = common // {
command = getKeyID;
};
"${key}-secret" = common // {
command = getSecretKey;
};
} else let
template = pkgs.writeText "garage-key-template" {
aws = ''
[default]
aws_access_key_id=@@GARAGE_KEY_ID@@
aws_secret_access_key=@@GARAGE_SECRET_KEY@@
'';
envFile = ''
AWS_ACCESS_KEY_ID=@@GARAGE_KEY_ID@@
AWS_SECRET_ACCESS_KEY=@@GARAGE_SECRET_KEY@@
'';
}.${kCfg.locksmith.format};
in {
${key} = common // {
command = pkgs.writeShellScript "garage-render-key-template" ''
tmpFile="$(mktemp -ut garageKeyTemplate-XXXXXXXXXXXXXXXX)"
cp ${template} "$tmpFile"
trap "rm -f $tmpFile" EXIT
chmod 600 "$tmpFile"
${getKeyID} | ${pkgs.replace-secret}/bin/replace-secret '@@GARAGE_KEY_ID@@' /dev/stdin "$tmpFile"
${getSecretKey} | ${pkgs.replace-secret}/bin/replace-secret '@@GARAGE_SECRET_KEY@@' /dev/stdin "$tmpFile"
cat "$tmpFile"
'';
};
}) cfg.keys);
};
};
}