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|
{ config, pkgs, ... }:
let
cfg = config.deuxfleurs;
in
with builtins;
with pkgs.lib;
{
options.deuxfleurs =
{
# 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;
};
ipv6 = mkOption {
description = "Public IPv6 address of this node";
type = types.str;
};
ipv6_prefix_length = mkOption {
description = "Prefix length associated with ipv6 ip";
type = types.int;
};
wesher_cluster_prefix = mkOption {
description = "IP address prefix for the Wesher overlay network";
type = types.str;
};
wesher_cluster_prefix_length = mkOption {
description = "IP address prefix length for the Wesher overlay network";
type = types.int;
default = 16;
};
cluster_ip = mkOption {
description = "IP address of this node on the Wesher mesh network";
type = types.str;
};
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;
};
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 =
let ip4config = {
useDHCP = false;
ipv4.addresses = [
{
address = cfg.lan_ip;
prefixLength = cfg.lan_ip_prefix_length;
}
];
};
ip6config = {
ipv6.addresses = [
{
address = cfg.ipv6;
prefixLength = cfg.ipv6_prefix_length;
}
];
};
in
(attrsets.setAttrByPath [ cfg.network_interface ] (ip4config // ip6config));
networking.defaultGateway = {
address = cfg.lan_default_gateway;
interface = cfg.network_interface;
};
# wesher overlay network
services.wesher = {
enable = true;
bindIface = cfg.network_interface;
overlayNet = "${cfg.wesher_cluster_prefix}/${toString cfg.wesher_cluster_prefix_length}";
interface = "wg0";
logLevel = "debug";
};
# 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.cluster_ip}";
ports.http = -1;
addresses.https = "0.0.0.0";
ports.https = 8501;
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 = "${cfg.cluster_ip}";
http = "${cfg.cluster_ip}";
serf = "${cfg.cluster_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;
}
];
}
];
}
];
};
# ---- Firewall config ----
# Open ports in the firewall.
networking.firewall = {
enable = true;
# Allow anyone to connect on SSH port
allowedTCPPorts = [
(builtins.head ({ openssh.ports = [22]; } // config.services).openssh.ports)
];
# Allow specific hosts access to specific things in the cluster
extraCommands = ''
# Allow everything from router (usefull for UPnP/IGD)
iptables -A INPUT -s ${cfg.lan_default_gateway} -j ACCEPT
# 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
iptables -A INPUT -s ${cfg.wesher_cluster_prefix}/${toString cfg.wesher_cluster_prefix_length} -j ACCEPT
'';
# When stopping firewall, delete all rules that were configured manually above
extraStopCommands = ''
iptables -D INPUT -s ${cfg.lan_default_gateway} -j ACCEPT
iptables -D INPUT -s 172.17.0.0/16 -j ACCEPT
iptables -D INPUT -s ${cfg.wesher_cluster_prefix}/${toString cfg.wesher_cluster_prefix_length} -j ACCEPT
'';
};
};
}
|
