119 lines
2.9 KiB
Nix
119 lines
2.9 KiB
Nix
{ config, lib, pkgs, ... }:
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# if quorum gets lost, then start any node with a config that doesn't contain bootstrap_expect
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# but -bootstrap
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# TODO consul-bootstrap HOST that actually does is
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# TODO tools to inspect state of a cluster in outage state
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with lib;
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let
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cfg = config.tv.consul;
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out = {
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options.tv.consul = api;
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config = mkIf cfg.enable (mkMerge [
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imp
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{ tv.iptables.input-retiolum-accept-new-tcp = [ "8300" "8301" ]; }
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# TODO udp for 8301
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]);
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};
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api = {
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enable = mkEnableOption "tv.consul";
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dc = mkOption {
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type = types.label;
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};
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hosts = mkOption {
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type = with types; listOf host;
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};
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encrypt-file = mkOption {
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type = types.str; # TODO path (but not just into store)
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default = toString <secrets/consul-encrypt.json>;
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};
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data-dir = mkOption {
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type = types.str; # TODO path (but not just into store)
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default = "/var/lib/consul";
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};
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self = mkOption {
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type = types.host;
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};
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server = mkOption {
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type = types.bool;
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default = false;
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};
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GOMAXPROCS = mkOption {
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type = types.int;
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default = cfg.self.cores;
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};
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};
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consul-config = {
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datacenter = cfg.dc;
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data_dir = cfg.data-dir;
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log_level = "INFO";
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#node_name =
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server = cfg.server;
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enable_syslog = true;
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retry_join =
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# TODO allow consul in other nets than retiolum [maybe]
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concatMap (host: host.nets.retiolum.addrs)
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(filter (host: host.name != cfg.self.name) cfg.hosts);
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leave_on_terminate = true;
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} // optionalAttrs cfg.server {
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bootstrap_expect = length cfg.hosts;
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leave_on_terminate = false;
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};
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imp = {
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environment.systemPackages = with pkgs; [
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consul
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];
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systemd.services.consul = {
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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path = with pkgs; [
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consul
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];
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environment = {
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GOMAXPROCS = toString cfg.GOMAXPROCS;
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};
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serviceConfig = {
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PermissionsStartOnly = "true";
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SyslogIdentifier = "consul";
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User = user.name;
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PrivateTmp = "true";
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Restart = "always";
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ExecStartPre = pkgs.writeScript "consul-init" ''
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#! /bin/sh
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mkdir -p ${cfg.data-dir}
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chown ${user.name}: ${cfg.data-dir}
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install -o ${user.name} -m 0400 ${cfg.encrypt-file} /tmp/encrypt.json
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'';
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ExecStart = pkgs.writeScript "consul-service" ''
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#! /bin/sh
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set -euf
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exec >/dev/null
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exec consul agent \
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-config-file=${toFile "consul.json" (toJSON consul-config)} \
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-config-file=/tmp/encrypt.json
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'';
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#-node=${cfg.self.fqdn} \
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#ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user} -D";
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};
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};
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users.extraUsers = singleton {
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inherit (user) name uid;
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};
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};
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user = rec {
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name = "consul";
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uid = genid name;
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};
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in
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out
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