128 lines
4.1 KiB
Nix
128 lines
4.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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format = pkgs.formats.json { };
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commonOptions = { pkgName, flavour ? pkgName }: mkOption {
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default = { };
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description = mdDoc ''
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Attribute set of ${flavour} instances.
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Creates independent `${flavour}-''${name}.service` systemd units for each instance defined here.
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'';
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type = with types; attrsOf (submodule ({ name, ... }: {
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options = {
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enable = mkEnableOption (mdDoc "this ${flavour} instance") // { default = true; };
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package = mkPackageOption pkgs pkgName { };
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user = mkOption {
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type = types.str;
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default = "root";
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description = mdDoc ''
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User under which this instance runs.
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'';
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};
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group = mkOption {
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type = types.str;
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default = "root";
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description = mdDoc ''
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Group under which this instance runs.
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'';
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};
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settings = mkOption {
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type = types.submodule {
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freeformType = format.type;
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options = {
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pid_file = mkOption {
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default = "/run/${flavour}/${name}.pid";
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type = types.str;
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description = mdDoc ''
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Path to use for the pid file.
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'';
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};
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template = mkOption {
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default = [ ];
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type = with types; listOf (attrsOf anything);
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description =
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let upstreamDocs =
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if flavour == "vault-agent"
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then "https://developer.hashicorp.com/vault/docs/agent/template"
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else "https://github.com/hashicorp/consul-template/blob/main/docs/configuration.md#templates";
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in
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mdDoc ''
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Template section of ${flavour}.
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Refer to <${upstreamDocs}> for supported values.
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'';
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};
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};
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};
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default = { };
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description =
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let upstreamDocs =
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if flavour == "vault-agent"
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then "https://developer.hashicorp.com/vault/docs/agent#configuration-file-options"
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else "https://github.com/hashicorp/consul-template/blob/main/docs/configuration.md#configuration-file";
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in
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mdDoc ''
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Free-form settings written directly to the `config.json` file.
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Refer to <${upstreamDocs}> for supported values.
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::: {.note}
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Resulting format is JSON not HCL.
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Refer to <https://www.hcl2json.com/> if you are unsure how to convert HCL options to JSON.
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:::
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'';
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};
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};
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}));
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};
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createAgentInstance = { instance, name, flavour }:
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let
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configFile = format.generate "${name}.json" instance.settings;
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in
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mkIf (instance.enable) {
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description = "${flavour} daemon - ${name}";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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path = [ pkgs.getent ];
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startLimitIntervalSec = 60;
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startLimitBurst = 3;
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serviceConfig = {
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User = instance.user;
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Group = instance.group;
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RuntimeDirectory = flavour;
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ExecStart = "${getExe instance.package} ${optionalString ((getName instance.package) == "vault") "agent"} -config ${configFile}";
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ExecReload = "${pkgs.coreutils}/bin/kill -SIGHUP $MAINPID";
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KillSignal = "SIGINT";
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TimeoutStopSec = "30s";
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Restart = "on-failure";
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};
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};
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in
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{
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options = {
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services.consul-template.instances = commonOptions { pkgName = "consul-template"; };
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services.vault-agent.instances = commonOptions { pkgName = "vault"; flavour = "vault-agent"; };
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};
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config = mkMerge (map
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(flavour:
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let cfg = config.services.${flavour}; in
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mkIf (cfg.instances != { }) {
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systemd.services = mapAttrs'
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(name: instance: nameValuePair "${flavour}-${name}" (createAgentInstance { inherit name instance flavour; }))
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cfg.instances;
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})
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[ "consul-template" "vault-agent" ]);
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meta.maintainers = with maintainers; [ emilylange tcheronneau ];
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}
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