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First working Wesher configuration

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Alex 2022-04-19 22:03:58 +02:00
parent 9ff81afd7e
commit db081fad0e
Signed by untrusted user: lx
GPG key ID: 0E496D15096376BE
3 changed files with 132 additions and 1 deletions
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3
deploy.sh
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@ -42,6 +42,7 @@ for NIXHOST in $NIXHOSTLIST; do
cat nix/deuxfleurs.nix | ssh -F $SSH_CONFIG $SSH_DEST tee $TMP_PATH/deuxfleurs.nix > /dev/null
cat nix/remote-unlock.nix | ssh -F $SSH_CONFIG $SSH_DEST tee $TMP_PATH/remote-unlock.nix > /dev/null
cat nix/wesher.nix | ssh -F $SSH_CONFIG $SSH_DEST tee $TMP_PATH/wesher.nix > /dev/null
cat nix/wesher_service.nix | ssh -F $SSH_CONFIG $SSH_DEST tee $TMP_PATH/wesher_service.nix > /dev/null
cat cluster/$CLUSTER/cluster.nix | ssh -F $SSH_CONFIG $SSH_DEST tee $TMP_PATH/cluster.nix > /dev/null
cat cluster/$CLUSTER/node/$NIXHOST.nix | ssh -F $SSH_CONFIG $SSH_DEST tee $TMP_PATH/node.nix > /dev/null
cat cluster/$CLUSTER/node/$NIXHOST.site.nix | ssh -F $SSH_CONFIG $SSH_DEST tee $TMP_PATH/site.nix > /dev/null
@ -59,7 +60,7 @@ for NIXHOST in $NIXHOSTLIST; do
set -ex
cd $TMP_PATH
mv deuxfleurs.nix remote-unlock.nix wesher.nix configuration.nix cluster.nix node.nix site.nix /etc/nixos
mv deuxfleurs.nix remote-unlock.nix wesher.nix wesher_service.nix configuration.nix cluster.nix node.nix site.nix /etc/nixos
nixos-rebuild switch

8
nix/configuration.nix
View file

@ -11,6 +11,8 @@
./hardware-configuration.nix
# Include generic Deuxfleurs module
./deuxfleurs.nix
# Wesher module
./wesher_service.nix
# Configuration for this deployment (a cluster)
./cluster.nix
# Configuration local for this Deuxfleurs site (set of nodes)
@ -79,6 +81,12 @@ SystemMaxUse=1G
services.openssh.enable = true;
services.openssh.passwordAuthentication = false;
services.wesher = {
enable = true;
join = [ "192.168.1.22" "192.168.1.23" ];
bindAddr = config.deuxfleurs.lan_ip; # for now
};
# ---- CONFIG FOR DEUXFLEURS CLUSTER ----
# Open ports in the firewall.

122
nix/wesher_service.nix Normal file
View file

@ -0,0 +1,122 @@
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.wesher;
in {
options = with types; {
services.wesher = {
enable = mkEnableOption "wesher wireguard overlay mesh network manager";
package = mkOption {
type = package;
default = pkgs.wesher;
defaultText = literalExpression "pkgs.wesher";
description = "Wesher package to use.";
};
clusterKey = mkOption {
type = nullOr str;
default = null;
description = "shared key for cluster membership; must be 32 bytes base64 encoded; will be generated if not provided";
};
bindAddr = mkOption {
type = nullOr str;
default = null;
description = "IP address to bind to for cluster membership (cannot be used with --bind-iface)";
};
bindIface = mkOption {
type = nullOr str;
default = null;
description = "Interface to bind to for cluster membership (cannot be used with --bind-addr)";
};
join = mkOption {
type = listOf str;
default = [];
description = "list of hostnames or IP addresses to existing cluster members; if not provided, will attempt resuming any known state or otherwise wait for further members";
};
clusterPort = mkOption {
type = port;
default = 7946;
description = "port used for membership gossip traffic (both TCP and UDP); must be the same accross cluster";
};
wireguardPort = mkOption {
type = port;
default = 51820;
description = "port used for wireguard traffic (UDP); must be the same accross cluster";
};
overlayNet = mkOption {
type = str;
default = "10.0.0.0/8";
description = "the network in which to allocate addresses for the overlay mesh network (CIDR format); smaller networks increase the chance of IP collision";
};
interface = mkOption {
type = str;
default = "wgoverlay";
description = "name of the wireguard interface to create and manage";
};
logLevel = mkOption {
type = str;
default = "warn";
description = "set the verbosity (one of debug/info/warn/error)";
};
};
};
config = mkIf cfg.enable (let binWesher = cfg.package + "/bin/wesher";
in {
systemd.services.wesher = {
description = "wesher wireguard overlay mesh network manager";
bindsTo = [ "network-online.target" ];
after = [ "network-online.target" ];
wantedBy = [ "multi-user.target" ];
environment = {
WESHER_JOIN = builtins.concatStringsSep "," cfg.join;
WESHER_CLUSTER_PORT = builtins.toString cfg.clusterPort;
WESHER_WIREGUARD_PORT = builtins.toString cfg.wireguardPort;
WESHER_OVERLAY_NET = cfg.overlayNet;
WESHER_INTERFACE = cfg.interface;
WESHER_LOG_LEVEL = cfg.logLevel;
WESHER_NO_ETC_HOSTS = "true";
}
// (if (cfg.clusterKey != null) then { WESHER_CLUSTER_KEY = cfg.clusterKey; } else {})
// (if (cfg.bindAddr != null) then { WESHER_BIND_ADDR = cfg.bindAddr; } else {})
// (if (cfg.bindIface != null) then { WESHER_BIND_IFACE = cfg.bindIface; } else {})
;
serviceConfig = {
ExecStart = "${binWesher}";
Restart = "always";
User = "wesher";
DynamicUser = true;
StateDirectory = "wesher";
AmbientCapabilities = "CAP_NET_ADMIN CAP_NET_BIND_SERVICE";
CapabilityBoundingSet = "CAP_NET_ADMIN CAP_NET_BIND_SERVICE";
MemoryDenyWriteExecute = true;
ProtectControlGroups = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6 AF_NETLINK";
RestrictNamespaces = true;
RestrictRealtime = true;
SystemCallArchitectures = "native";
SystemCallFilter = "~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io @resources";
};
};
networking.firewall.allowedUDPPorts = mkIf cfg.enable [ cfg.clusterPort cfg.wireguardPort ];
networking.firewall.allowedTCPPorts = mkIf cfg.enable [ cfg.clusterPort ];
});
}