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{ config , pkgs , . . . }:
let
cfg = config . deuxfleurs ;
in
with builtins ;
with pkgs . lib ;
{
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options . deuxfleurs =
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let wg_node = with types ; submodule {
options = {
hostname = mkOption {
type = str ;
description = " H o s t n a m e " ;
} ;
site_name = mkOption {
type = nullOr str ;
description = " S i t e w h e r e t h e n o d e i s l o c a t e d " ;
default = null ;
} ;
IP = mkOption {
type = str ;
description = " I P A d d r e s s i n t h e W i r e g u a r d n e t w o r k " ;
} ;
publicKey = mkOption {
type = str ;
description = " P u b l i c k e y " ;
} ;
endpoint = mkOption {
type = nullOr str ;
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default = null ;
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description = " W i r e g u a r d e n d p o i n t o n t h e p u b l i c I n t e r n e t " ;
} ;
} ;
} ;
in
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{
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# Parameters for individual nodes
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ipv6 = mkOption {
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description = " S t a t i c p u b l i c I P v 6 a d d r e s s o f t h i s n o d e " ;
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type = types . str ;
} ;
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staticIPv4 . address = mkOption {
description = " I P a d d r e s s ( w i t h p r e f i x l e n g t h ) o f t h i s n o d e o n t h e l o c a l n e t w o r k i n t e r f a c e " ;
type = types . nullOr types . str ;
default = null ;
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} ;
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cluster_ip = mkOption {
description = " I P a d d r e s s o f t h i s n o d e o n t h e W e s h e r m e s h n e t w o r k " ;
type = types . str ;
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} ;
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is_raft_server = mkOption {
description = " M a k e t h i s n o d e a R A F T s e r v e r f o r t h e N o m a d a n d C o n s u l d e p l o y m e n t s " ;
type = types . bool ;
default = false ;
} ;
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# Parameters that generally vary between sites
site_name = mkOption {
description = " S i t e ( a v a i l a b i l i t y z o n e ) o n w h i c h t h i s n o d e i s d e p l o y e d " ;
type = types . str ;
} ;
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staticIPv4 . defaultGateway = mkOption {
description = " I P v 4 a d d r e s s o f t h e d e f a u l t r o u t e o n t h e l o c a l n e t w o r k i n t e r f a c e " ;
type = types . nullOr types . str ;
default = null ;
} ;
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public_ipv4 = mkOption {
description = " P u b l i c I P v 4 t h r o u g h w h i c h t h i s n o d e i s a c c e s s i b l e ( p o s s i b l y a f t e r p o r t o p e n i n g u s i n g D i p l o N A T ) , f o r d o m a i n n a m e s t h a t a r e u p d a t e d b y D 5 3 " ;
type = types . nullOr types . str ;
default = null ;
} ;
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cname_target = mkOption {
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description = " D N S C N A M E t a r g e t t o u s e f o r s e r v i c e s h o s t e d i n t h i s s i t e , f o r d o m a i n n a m e s t h a t a r e u p d a t e d b y D 5 3 " ;
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type = types . nullOr types . str ;
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default = null ;
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} ;
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# Parameters common to all nodes
cluster_name = mkOption {
description = " N a m e o f t h i s D e u x f l e u r s d e p l o y m e n t " ;
type = types . str ;
} ;
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cluster_prefix = mkOption {
description = " I P a d d r e s s p r e f i x f o r t h e W i r e g u a r d o v e r l a y n e t w o r k " ;
type = types . str ;
} ;
cluster_prefix_length = mkOption {
description = " I P a d d r e s s p r e f i x l e n g t h f o r t h e W i r e g u a r d o v e r l a y n e t w o r k " ;
type = types . int ;
default = 16 ;
} ;
cluster_nodes = mkOption {
description = " N o d e s t h a t a r e p a r t o f t h e c l u s t e r " ;
type = types . listOf wg_node ;
} ;
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admin_accounts = mkOption {
description = " L i s t o f u s e r s h a v i n g a n a d m i n a c c o u n t o n c l u s t e r n o d e s , m a p s u s e r n a m e s t o a l i s t o f a u t h o r i z e d S S H k e y s " ;
type = types . attrsOf ( types . listOf types . str ) ;
} ;
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bootstrap = mkOption {
description = " W h e t h e r t o e n a b l e b o o t s t r a p p i n g f o r N o m a d a n d C o n s u l " ;
type = types . bool ;
default = false ;
} ;
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# Options that generally stay to their default value
wireguardPort = mkOption {
description = " P o r t f o r i n c o m i n g W i r e g u a r d V P N c o n n e c t i o n s " ;
type = types . port ;
default = 33799 ;
} ;
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} ;
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imports = [
./wgautomesh.nix
] ;
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config =
let node_meta = {
" s i t e " = cfg . site_name ;
" p u b l i c _ i p v 6 " = cfg . ipv6 ;
} //
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( if cfg . public_ipv4 != null
then { " p u b l i c _ i p v 4 " = cfg . public_ipv4 ; }
else { } ) //
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( if cfg . cname_target != null
then { " c n a m e _ t a r g e t " = cfg . cname_target ; }
else { } ) ;
in
{
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# Configure admin accounts on all nodes
users . users = builtins . mapAttrs ( name : publicKeys : {
isNormalUser = true ;
extraGroups = [ " w h e e l " ] ;
openssh . authorizedKeys . keys = publicKeys ;
} ) cfg . admin_accounts ;
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# Configure network interfaces
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networking . useDHCP = false ;
networking . useNetworkd = true ;
systemd . network . networks = {
" 1 0 - u p l i n k " = {
matchConfig = {
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Name = " e n * e t h * " ;
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} ;
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ipv6AcceptRAConfig = {
Token = " s t a t i c : ${ cfg . ipv6 } " ;
UseDNS = false ;
} ;
} // ( if cfg . staticIPv4 . address == null || cfg . staticIPv4 . defaultGateway == null then {
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networkConfig = {
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DHCP = " i p v 4 " ;
} ;
dhcpV4Config = {
UseDNS = false ;
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} ;
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} else {
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address = [
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" ${ cfg . staticIPv4 . address } "
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] ;
routes = [
{
routeConfig = {
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Gateway = cfg . staticIPv4 . defaultGateway ;
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# GatewayOnLink - Takes a boolean. If set to true, the kernel does not have to check if the gateway is reachable directly by the current machine (i.e., attached to the local network), so that we can insert the route in the kernel table without it being complained about. Defaults to "no".
GatewayOnLink = true ;
} ;
}
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] ;
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} ) ;
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} ;
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# Configure Unbound as a central DNS server for everything
# - is its own recursor (applies DNSSec) for everything,
# no need to declare an outside nameserver
# - redirects to Consul queries under .consul
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services . unbound = {
enable = true ;
settings = {
server = {
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interface = [ " 1 2 7 . 0 . 0 . 1 " " 1 7 2 . 1 7 . 0 . 1 " ] ;
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domain-insecure = [ " c o n s u l . " ] ;
local-zone = [ " c o n s u l . n o d e f a u l t " ] ;
log-servfail = true ;
access-control = [
" 1 2 7 . 0 . 0 . 0 / 8 a l l o w "
" 1 7 2 . 1 7 . 0 . 0 / 1 6 a l l o w "
] ;
} ;
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stub-zone = [
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# Forward .consul queries to Consul daemon
{
name = " c o n s u l . " ;
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stub-addr = " ${ cfg . cluster_ip } @ 8 6 0 0 " ;
stub-no-cache = true ;
stub-tcp-upstream = false ;
stub-tls-upstream = false ;
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}
] ;
} ;
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resolveLocalQueries = true ;
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} ;
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services . resolved . enable = false ;
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# Configure Wireguard VPN between all nodes
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networking . wireguard . interfaces . wg0 = {
ips = [ " ${ cfg . cluster_ip } / 1 6 " ] ;
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listenPort = cfg . wireguardPort ;
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privateKeyFile = " / v a r / l i b / d e u x f l e u r s / w i r e g u a r d - k e y s / p r i v a t e " ;
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mtu = 1420 ;
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} ;
services . wgautomesh = {
enable = true ;
interface = " w g 0 " ;
gossipPort = 1666 ;
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gossipSecretFile = " / v a r / l i b / w g a u t o m e s h / g o s s i p _ s e c r e t " ;
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persistFile = " / v a r / l i b / w g a u t o m e s h / s t a t e " ;
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upnpForwardPublicPort =
let
us = filter ( { hostname , . . . }: hostname == config . networking . hostName ) cfg . cluster_nodes ;
in
if length us > 0 && ( head us ) . endpoint != null then
strings . toInt ( lists . last ( split " : " ( head us ) . endpoint ) )
else null ;
peers = map ( { publicKey , endpoint , IP , . . . }: {
address = IP ;
pubkey = publicKey ;
endpoint = endpoint ;
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} ) cfg . cluster_nodes ;
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} ;
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# Old code for wg-quick, we can use this as a fallback if we fail to make wgautomesh work
# systemd.services."wg-quick-wg0".after = [ "unbound.service" ];
# networking.wg-quick.interfaces.wg0 = {
# address = [ "${cfg.cluster_ip}/16" ];
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# listenPort = cfg.wireguardPort;
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# privateKeyFile = "/var/lib/deuxfleurs/wireguard-keys/private";
# mtu = 1420;
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# peers = map ({ publicKey, endpoint, IP, ... }: {
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# inherit publicKey endpoint;
# allowedIPs = [ "${IP}/32" ];
# persistentKeepalive = 25;
# };
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system . activationScripts . generate_df_wg_key = ''
if [ ! - f /var/lib/deuxfleurs/wireguard-keys/private ] ; then
mkdir - p /var/lib/deuxfleurs/wireguard-keys
( umask 077 ; $ { pkgs . wireguard-tools } /bin/wg genkey > /var/lib/deuxfleurs/wireguard-keys/private )
echo " N e w W i r e g u a r d k e y w a s g e n e r a t e d . "
echo " T h i s n o d e ' s W i r e g u a r d p u b l i c k e y i s : $ ( ${ pkgs . wireguard-tools } / b i n / w g p u b k e y < / v a r / l i b / d e u x f l e u r s / w i r e g u a r d - k e y s / p r i v a t e ) "
fi
'' ;
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# Configure /etc/hosts to link all hostnames to their Wireguard IP
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networking . extraHosts = builtins . concatStringsSep " \n " ( map
( { hostname , IP , . . . }: " ${ IP } ${ hostname } " )
cfg . cluster_nodes ) ;
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# Enable Hashicorp Consul & Nomad
services . consul . enable = true ;
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systemd . services . consul . after = [ " w g - q u i c k - w g 0 . s e r v i c e " ] ;
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services . consul . extraConfig =
( if cfg . is_raft_server
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then { server = true ; }
// ( if cfg . bootstrap then { bootstrap_expect = 3 ; } else { } )
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else { } ) //
{
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inherit node_meta ;
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datacenter = cfg . cluster_name ;
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ui_config = {
enabled = true ;
} ;
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bind_addr = " ${ cfg . cluster_ip } " ;
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addresses = {
https = " 0 . 0 . 0 . 0 " ;
dns = " 0 . 0 . 0 . 0 " ;
} ;
ports = {
http = -1 ;
https = 8501 ;
} ;
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performance = {
rpc_hold_timeout = " 7 0 s " ;
} ;
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ca_file = " / v a r / l i b / c o n s u l / p k i / c o n s u l - c a . c r t " ;
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cert_file = " / v a r / l i b / c o n s u l / p k i / c o n s u l . c r t " ;
key_file = " / v a r / l i b / c o n s u l / p k i / c o n s u l . k e y " ;
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verify_incoming = true ;
verify_outgoing = true ;
verify_server_hostname = true ;
} ;
services . nomad . enable = true ;
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systemd . services . nomad . after = [ " w g - q u i c k - w g 0 . s e r v i c e " ] ;
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services . nomad . package = pkgs . nomad_1_4 ;
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services . nomad . extraPackages = [
pkgs . glibc
pkgs . zstd
] ;
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services . nomad . settings =
( if cfg . is_raft_server
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then {
server = { enabled = true ; }
// ( if cfg . bootstrap then { bootstrap_expect = 3 ; } else { } ) ;
} else { } ) //
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{
region = cfg . cluster_name ;
datacenter = cfg . site_name ;
advertise = {
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rpc = " ${ cfg . cluster_ip } " ;
http = " ${ cfg . cluster_ip } " ;
serf = " ${ cfg . cluster_ip } " ;
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} ;
consul = {
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address = " l o c a l h o s t : 8 5 0 1 " ;
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ca_file = " / v a r / l i b / n o m a d / p k i / c o n s u l . c r t " ;
cert_file = " / v a r / l i b / n o m a d / p k i / c o n s u l - c l i e n t . c r t " ;
key_file = " / v a r / l i b / n o m a d / p k i / c o n s u l - c l i e n t . k e y " ;
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ssl = true ;
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checks_use_advertise = true ;
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} ;
client = {
enabled = true ;
network_interface = " w g 0 " ;
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meta = node_meta ;
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} ;
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telemetry = {
publish_allocation_metrics = true ;
publish_node_metrics = true ;
prometheus_metrics = true ;
} ;
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tls = {
http = true ;
rpc = true ;
ca_file = " / v a r / l i b / n o m a d / p k i / n o m a d - c a . c r t " ;
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cert_file = " / v a r / l i b / n o m a d / p k i / n o m a d . c r t " ;
key_file = " / v a r / l i b / n o m a d / p k i / n o m a d . k e y " ;
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verify_server_hostname = true ;
verify_https_client = true ;
} ;
plugin = [
{
docker = [
{
config = [
{
volumes . enabled = true ;
allow_privileged = true ;
}
] ;
}
] ;
}
] ;
} ;
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# ---- Firewall config ----
# Open ports in the firewall.
networking . firewall = {
enable = true ;
allowedTCPPorts = [
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# Allow anyone to connect on SSH port
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( builtins . head ( { openssh . ports = [ 22 ] ; } // config . services ) . openssh . ports )
] ;
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allowedUDPPorts = [
# Allow peers to connect to Wireguard
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cfg . wireguardPort
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] ;
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# Allow specific hosts access to specific things in the cluster
extraCommands = ''
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# Allow UDP packets comming from port 1900 from a local address,
# these are necessary for UPnP/IGD
iptables - A INPUT - s 192.168.0.0/16 - p udp - - sport 1900 - j ACCEPT
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# Allow docker containers to access all ports
iptables - A INPUT - s 172.17.0.0/16 - j ACCEPT
# Allow other nodes on VPN to access all ports
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iptables - A INPUT - s $ { cfg . cluster_prefix } / $ { toString cfg . cluster_prefix_length } - j ACCEPT
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'' ;
# When stopping firewall, delete all rules that were configured manually above
extraStopCommands = ''
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iptables - D INPUT - s 192.168.0.0/16 - p udp - - sport 1900 - j ACCEPT
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iptables - D INPUT - s 172.17.0.0/16 - j ACCEPT
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iptables - D INPUT - s $ { cfg . cluster_prefix } / $ { toString cfg . cluster_prefix_length } - j ACCEPT
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'' ;
} ;
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} ;
}