107 lines
3.1 KiB
Nix
107 lines
3.1 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
let
|
|
cfg = config.services.haproxy;
|
|
|
|
haproxyCfg = pkgs.writeText "haproxy.conf" ''
|
|
global
|
|
# needed for hot-reload to work without dropping packets in multi-worker mode
|
|
stats socket /run/haproxy/haproxy.sock mode 600 expose-fd listeners level user
|
|
|
|
${cfg.config}
|
|
'';
|
|
|
|
in
|
|
with lib;
|
|
{
|
|
options = {
|
|
services.haproxy = {
|
|
|
|
enable = mkEnableOption "HAProxy, the reliable, high performance TCP/HTTP load balancer";
|
|
|
|
package = mkPackageOption pkgs "haproxy" { };
|
|
|
|
user = mkOption {
|
|
type = types.str;
|
|
default = "haproxy";
|
|
description = "User account under which haproxy runs.";
|
|
};
|
|
|
|
group = mkOption {
|
|
type = types.str;
|
|
default = "haproxy";
|
|
description = "Group account under which haproxy runs.";
|
|
};
|
|
|
|
config = mkOption {
|
|
type = types.nullOr types.lines;
|
|
default = null;
|
|
description = ''
|
|
Contents of the HAProxy configuration file,
|
|
{file}`haproxy.conf`.
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
|
|
config = mkIf cfg.enable {
|
|
|
|
assertions = [{
|
|
assertion = cfg.config != null;
|
|
message = "You must provide services.haproxy.config.";
|
|
}];
|
|
|
|
# configuration file indirection is needed to support reloading
|
|
environment.etc."haproxy.cfg".source = haproxyCfg;
|
|
|
|
systemd.services.haproxy = {
|
|
description = "HAProxy";
|
|
after = [ "network.target" ];
|
|
wantedBy = [ "multi-user.target" ];
|
|
serviceConfig = {
|
|
User = cfg.user;
|
|
Group = cfg.group;
|
|
Type = "notify";
|
|
ExecStartPre = [
|
|
# when the master process receives USR2, it reloads itself using exec(argv[0]),
|
|
# so we create a symlink there and update it before reloading
|
|
"${pkgs.coreutils}/bin/ln -sf ${lib.getExe cfg.package} /run/haproxy/haproxy"
|
|
# when running the config test, don't be quiet so we can see what goes wrong
|
|
"/run/haproxy/haproxy -c -f ${haproxyCfg}"
|
|
];
|
|
ExecStart = "/run/haproxy/haproxy -Ws -f /etc/haproxy.cfg -p /run/haproxy/haproxy.pid";
|
|
# support reloading
|
|
ExecReload = [
|
|
"${lib.getExe cfg.package} -c -f ${haproxyCfg}"
|
|
"${pkgs.coreutils}/bin/ln -sf ${lib.getExe cfg.package} /run/haproxy/haproxy"
|
|
"${pkgs.coreutils}/bin/kill -USR2 $MAINPID"
|
|
];
|
|
KillMode = "mixed";
|
|
SuccessExitStatus = "143";
|
|
Restart = "always";
|
|
RuntimeDirectory = "haproxy";
|
|
# upstream hardening options
|
|
NoNewPrivileges = true;
|
|
ProtectHome = true;
|
|
ProtectSystem = "strict";
|
|
ProtectKernelTunables = true;
|
|
ProtectKernelModules = true;
|
|
ProtectControlGroups = true;
|
|
SystemCallFilter= "~@cpu-emulation @keyring @module @obsolete @raw-io @reboot @swap @sync";
|
|
# needed in case we bind to port < 1024
|
|
AmbientCapabilities = "CAP_NET_BIND_SERVICE";
|
|
};
|
|
};
|
|
|
|
users.users = optionalAttrs (cfg.user == "haproxy") {
|
|
haproxy = {
|
|
group = cfg.group;
|
|
isSystemUser = true;
|
|
};
|
|
};
|
|
|
|
users.groups = optionalAttrs (cfg.group == "haproxy") {
|
|
haproxy = {};
|
|
};
|
|
};
|
|
}
|