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|
{ config, pkgs, ... }:
let
cfg = config.deuxfleurs;
in
with builtins;
with pkgs.lib;
{
options.deuxfleurs =
let wg_node = with types; submodule {
options = {
hostname = mkOption {
type = str;
description = "Host name";
};
site_name = mkOption {
type = nullOr str;
description = "Site where the node is located";
default = null;
};
IP = mkOption {
type = str;
description = "IP Address";
};
publicKey = mkOption {
type = str;
description = "Public key";
};
endpoint = mkOption {
type = nullOr str;
description = "Wireguard endpoint on the public Internet";
};
lan_endpoint = mkOption {
type = nullOr str;
description = "Wireguard endpoint for nodes in the same site";
default = null;
};
};
};
in
{
# Parameters for individual nodes
network_interface = mkOption {
description = "Network interface name to configure";
type = types.str;
};
lan_ip = mkOption {
description = "IP address of this node on the local network interface";
type = types.str;
};
lan_ip_prefix_length = mkOption {
description = "Prefix length associated with lan_ip";
type = types.int;
};
vpn_ip = mkOption {
description = "IP address of this node on the Wireguard VPN";
type = types.str;
};
vpn_listen_port = mkOption {
description = "Port for incoming Wireguard VPN connections";
type = types.port;
};
is_raft_server = mkOption {
description = "Make this node a RAFT server for the Nomad and Consul deployments";
type = types.bool;
default = false;
};
# Parameters that generally vary between sites
lan_default_gateway = mkOption {
description = "IP address of the default route on the locak network interface";
type = types.str;
};
site_name = mkOption {
description = "Site (availability zone) on which this node is deployed";
type = types.str;
};
# Parameters common to all nodes
cluster_name = mkOption {
description = "Name of this Deuxfleurs deployment";
type = types.str;
};
cluster_nodes = mkOption {
description = "Nodes that are part of the cluster";
type = types.listOf wg_node;
};
admin_nodes = mkOption {
description = "Machines that are part of the Wireguard VPN for administration purposes";
type = types.listOf wg_node;
};
admin_accounts = mkOption {
description = "List of users having an admin account on cluster nodes, maps user names to a list of authorized SSH keys";
type = types.attrsOf (types.listOf types.str);
};
};
config = {
# Configure admin accounts on all nodes
users.users = builtins.mapAttrs (name: publicKeys: {
isNormalUser = true;
extraGroups = [ "wheel" ];
openssh.authorizedKeys.keys = publicKeys;
}) cfg.admin_accounts;
# Configure network interfaces
networking.interfaces = attrsets.setAttrByPath [ cfg.network_interface ] {
useDHCP = false;
ipv4.addresses = [
{
address = cfg.lan_ip;
prefixLength = cfg.lan_ip_prefix_length;
}
];
};
networking.defaultGateway = {
address = cfg.lan_default_gateway;
interface = cfg.network_interface;
};
# Configure Wireguard VPN between all nodes
networking.wireguard.interfaces.wg0 = {
ips = [ "${cfg.vpn_ip}/16" ];
listenPort = cfg.vpn_listen_port;
privateKeyFile = "/var/lib/deuxfleurs/wireguard-keys/private";
peers = map ({ publicKey, endpoint, IP, site_name, lan_endpoint, ... }: {
publicKey = publicKey;
allowedIPs = [ "${IP}/32" ];
endpoint = if site_name != null && site_name == cfg.site_name && lan_endpoint != null
then lan_endpoint else endpoint;
persistentKeepalive = 25;
}) (cfg.cluster_nodes ++ cfg.admin_nodes);
};
networking.firewall.allowedUDPPorts = [ cfg.vpn_listen_port ];
# Configure /etc/hosts to link all hostnames to their Wireguard IP
networking.extraHosts = builtins.concatStringsSep "\n" (map
({ hostname, IP, ...}: "${IP} ${hostname}")
(cfg.cluster_nodes ++ cfg.admin_nodes));
# Enable Hashicorp Consul & Nomad
services.consul.enable = true;
services.consul.extraConfig =
(if cfg.is_raft_server
then {
server = true;
bootstrap_expect = 3;
}
else {}) //
{
datacenter = cfg.cluster_name;
node_meta = {
"site" = cfg.site_name;
};
ui = true;
bind_addr = cfg.vpn_ip;
ports.http = -1;
addresses.https = "0.0.0.0";
ports.https = 8501;
retry_join = map (node_info: node_info.IP) cfg.cluster_nodes;
ca_file = "/var/lib/consul/pki/consul-ca.crt";
cert_file = "/var/lib/consul/pki/consul2022.crt";
key_file = "/var/lib/consul/pki/consul2022.key";
verify_incoming = true;
verify_outgoing = true;
verify_server_hostname = true;
};
services.nomad.enable = true;
services.nomad.package = pkgs.nomad_1_1;
services.nomad.settings =
(if cfg.is_raft_server
then { server = {
enabled = true;
bootstrap_expect = 3;
}; }
else {}) //
{
region = cfg.cluster_name;
datacenter = cfg.site_name;
advertise = {
rpc = cfg.vpn_ip;
http = cfg.vpn_ip;
serf = cfg.vpn_ip;
};
consul = {
address = "localhost:8501";
ca_file = "/var/lib/nomad/pki/consul2022.crt";
cert_file = "/var/lib/nomad/pki/consul2022-client.crt";
key_file = "/var/lib/nomad/pki/consul2022-client.key";
ssl = true;
};
client = {
enabled = true;
network_interface = "wg0";
meta = {
"site" = cfg.site_name;
};
};
tls = {
http = true;
rpc = true;
ca_file = "/var/lib/nomad/pki/nomad-ca.crt";
cert_file = "/var/lib/nomad/pki/nomad2022.crt";
key_file = "/var/lib/nomad/pki/nomad2022.key";
verify_server_hostname = true;
verify_https_client = true;
};
plugin = [
{
docker = [
{
config = [
{
volumes.enabled = true;
allow_privileged = true;
}
];
}
];
}
];
};
};
}
|
