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{ config, lib, pkgs, ... }:
# if quorum gets lost, then start any node with a config that doesn't contain bootstrap_expect
# but -bootstrap
# TODO consul-bootstrap HOST that actually does is
# TODO tools to inspect state of a cluster in outage state
with import ../../4lib/tv { inherit lib pkgs; };
let
cfg = config.tv.consul;
out = {
imports = [ ../../3modules/tv/iptables.nix ];
options.tv.consul = api;
config = mkIf cfg.enable (mkMerge [
imp
{ tv.iptables.input-retiolum-accept-new-tcp = [ "8300" "8301" ]; }
# TODO udp for 8301
]);
};
api = {
enable = mkEnableOption "tv.consul";
dc = mkOption {
type = types.label;
};
hosts = mkOption {
type = with types; listOf host;
};
encrypt-file = mkOption {
type = types.str; # TODO path (but not just into store)
default = "/root/src/secrets/consul-encrypt.json";
};
data-dir = mkOption {
type = types.str; # TODO path (but not just into store)
default = "/var/lib/consul";
};
self = mkOption {
type = types.host;
};
server = mkOption {
type = types.bool;
default = false;
};
GOMAXPROCS = mkOption {
type = types.int;
default = cfg.self.cores;
};
};
consul-config = {
datacenter = cfg.dc;
data_dir = cfg.data-dir;
log_level = "INFO";
#node_name =
server = cfg.server;
enable_syslog = true;
retry_join =
# TODO allow consul in other nets than retiolum [maybe]
concatMap (host: host.nets.retiolum.addrs)
(filter (host: host.name != cfg.self.name) cfg.hosts);
leave_on_terminate = true;
} // optionalAttrs cfg.server {
bootstrap_expect = length cfg.hosts;
leave_on_terminate = false;
};
imp = {
environment.systemPackages = with pkgs; [
consul
];
systemd.services.consul = {
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
path = with pkgs; [
consul
];
environment = {
GOMAXPROCS = toString cfg.GOMAXPROCS;
};
serviceConfig = {
PermissionsStartOnly = "true";
SyslogIdentifier = "consul";
User = user.name;
PrivateTmp = "true";
Restart = "always";
ExecStartPre = pkgs.writeScript "consul-init" ''
#! /bin/sh
mkdir -p ${cfg.data-dir}
chown ${user.name}: ${cfg.data-dir}
install -o ${user.name} -m 0400 ${cfg.encrypt-file} /tmp/encrypt.json
'';
ExecStart = pkgs.writeScript "consul-service" ''
#! /bin/sh
set -euf
exec >/dev/null
exec consul agent \
-config-file=${toFile "consul.json" (toJSON consul-config)} \
-config-file=/tmp/encrypt.json
'';
#-node=${cfg.self.fqdn} \
#ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user} -D";
};
};
users.extraUsers = singleton {
inherit (user) name uid;
};
};
user = {
name = "consul";
uid = 2999951406; # genid consul
};
in
out
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