diff options
Diffstat (limited to 'nix')
| -rw-r--r-- | nix/deuxfleurs.nix | 303 | ||||
| -rw-r--r-- | nix/remote-unlock.nix | 29 |
2 files changed, 155 insertions, 177 deletions
diff --git a/nix/deuxfleurs.nix b/nix/deuxfleurs.nix index f7b70d7..7632486 100644 --- a/nix/deuxfleurs.nix +++ b/nix/deuxfleurs.nix @@ -6,128 +6,100 @@ 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 in the Wireguard network"; - }; - publicKey = mkOption { - type = str; - description = "Public key"; - }; - endpoint = mkOption { - type = nullOr str; - default = null; - description = "Wireguard endpoint on the public Internet"; - }; - }; - }; - in - { + options.deuxfleurs = with types; { # 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; + hostName = mkOption { + description = "Node name"; + type = str; }; - ipv6_prefix_length = mkOption { - description = "Prefix length associated with ipv6 ip"; - type = types.int; + ipv6Address = mkOption { + description = "Static public IPv6 address of this node"; + type = str; }; - - cluster_ip = mkOption { - description = "IP address of this node on the Wesher mesh network"; - type = types.str; - }; - wireguard_port = mkOption { - description = "Port for incoming Wireguard VPN connections"; - type = types.port; - default = 33799; + staticIPv4.address = mkOption { + description = "IP address (with prefix length) of this node on the local network interface"; + type = nullOr str; + default = null; }; - is_raft_server = mkOption { + isRaftServer = mkOption { description = "Make this node a RAFT server for the Nomad and Consul deployments"; - type = types.bool; + type = bool; default = false; }; # Parameters that generally vary between sites - lan_default_gateway = mkOption { - description = "IPv4 address of the default route on the local network interface"; - type = types.str; - }; - ipv6_default_gateway = mkOption { - description = "IPv6 address of the default IPv6 gateway for the targeted net interface"; - type = types.str; - }; - site_name = mkOption { + siteName = mkOption { description = "Site (availability zone) on which this node is deployed"; - type = types.str; + type = str; + }; + staticIPv4.defaultGateway = mkOption { + description = "IPv4 address of the default route on the local network interface"; + type = nullOr str; + default = null; }; - public_ipv4 = mkOption { + + publicIPv4 = mkOption { description = "Public IPv4 through which this node is accessible (possibly after port opening using DiploNAT), for domain names that are updated by D53"; - type = types.nullOr types.str; + type = nullOr str; default = null; }; - cname_target = mkOption { + cnameTarget = mkOption { description = "DNS CNAME target to use for services hosted in this site, for domain names that are updated by D53"; - type = types.nullOr types.str; + type = nullOr str; default = null; }; - nameservers = mkOption { - description = "External DNS servers to use"; - type = types.listOf types.str; - }; # Parameters common to all nodes - cluster_name = mkOption { + clusterName = mkOption { description = "Name of this Deuxfleurs deployment"; - type = types.str; + type = str; }; - cluster_prefix = mkOption { - description = "IP address prefix for the Wireguard overlay network"; - type = types.str; + clusterPrefix = mkOption { + description = "IP address prefix (and length) for the Wireguard overlay network"; + type = str; }; - cluster_prefix_length = mkOption { - description = "IP address prefix length for the Wireguard overlay network"; - type = types.int; - default = 16; - }; - cluster_nodes = mkOption { + clusterNodes = mkOption { description = "Nodes that are part of the cluster"; - type = types.listOf wg_node; + type = attrsOf (submodule { + options = { + siteName = mkOption { + type = nullOr str; + description = "Site where the node is located"; + default = null; + }; + address = mkOption { + type = str; + description = "IP Address in the Wireguard network"; + }; + publicKey = mkOption { + type = str; + description = "Public key"; + }; + endpoint = mkOption { + type = nullOr str; + default = null; + description = "Wireguard endpoint on the public Internet"; + }; + }; + }); }; - admin_accounts = mkOption { + adminAccounts = 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); + type = attrsOf (listOf str); }; bootstrap = mkOption { description = "Whether to enable bootstrapping for Nomad and Consul"; - type = types.bool; + type = bool; default = false; }; + + # Options that generally stay to their default value + wireguardPort = mkOption { + description = "Port for incoming Wireguard VPN connections"; + type = port; + default = 33799; + }; }; imports = [ @@ -135,25 +107,29 @@ in ]; config = - let node_meta = { - "site" = cfg.site_name; - "public_ipv6" = cfg.ipv6; + let + clusterNodeCfg = getAttr cfg.hostName cfg.clusterNodes; + clusterAddress = clusterNodeCfg.address; + node_meta = { + "site" = cfg.siteName; + "public_ipv6" = cfg.ipv6Address; } // - (if cfg.public_ipv4 != null - then { "public_ipv4" = cfg.public_ipv4; } + (if cfg.publicIPv4 != null + then { "public_ipv4" = cfg.publicIPv4; } else {}) // - (if cfg.cname_target != null - then { "cname_target" = cfg.cname_target; } + (if cfg.cnameTarget != null + then { "cname_target" = cfg.cnameTarget; } else {}); in { + networking.hostName = cfg.hostName; # Configure admin accounts on all nodes - users.users = builtins.mapAttrs (name: publicKeys: { + users.users = mapAttrs (name: publicKeys: { isNormalUser = true; extraGroups = [ "wheel" ]; openssh.authorizedKeys.keys = publicKeys; - }) cfg.admin_accounts; + }) cfg.adminAccounts; # Configure network interfaces networking.useDHCP = false; @@ -161,82 +137,71 @@ in systemd.network.networks = { "10-uplink" = { matchConfig = { - # We could preprend "en* eth*" to match all ethernet interfaces - Name = "${cfg.network_interface}"; + Name = "en* eth*"; }; + ipv6AcceptRAConfig = { + Token = "static:${cfg.ipv6Address}"; + UseDNS = false; + }; + } // (if cfg.staticIPv4.address == null || cfg.staticIPv4.defaultGateway == null then { networkConfig = { - IPv6AcceptRA = false; - LinkLocalAddressing = "no"; + DHCP = "ipv4"; + }; + dhcpV4Config = { + UseDNS = false; }; + } else { address = [ - "${cfg.lan_ip}/${toString cfg.lan_ip_prefix_length}" - "${cfg.ipv6}/${toString cfg.ipv6_prefix_length}" + "${cfg.staticIPv4.address}" ]; routes = [ { routeConfig = { - Gateway = cfg.lan_default_gateway; + Gateway = cfg.staticIPv4.defaultGateway; # GatewayOnLink - Takes a boolean. If set to true, the kernel does not have to check if the gateway is reachable directly by the current machine (i.e., attached to the local network), so that we can insert the route in the kernel table without it being complained about. Defaults to "no". GatewayOnLink = true; }; } - { - routeConfig = { - Gateway = cfg.ipv6_default_gateway; - GatewayOnLink = true; - }; - } ]; - }; + }); }; - # Configure Unbound DNS to redirect to Consul queries under .consul - # and to pass directly to public DNS resolver all others + # Configure Unbound as a central DNS server for everything + # - is its own recursor (applies DNSSec) for everything, + # no need to declare an outside nameserver + # - redirects to Consul queries under .consul services.unbound = { enable = true; - enableRootTrustAnchor = false; # disable DNSSEC as it causes issues settings = { server = { - interface = [ "127.0.0.1" "${cfg.lan_ip}" "172.17.0.1" ]; + interface = [ "127.0.0.1" "172.17.0.1" ]; domain-insecure = [ "consul." ]; local-zone = [ "consul. nodefault" ]; log-servfail = true; access-control = [ "127.0.0.0/8 allow" - "${cfg.lan_ip}/${toString cfg.lan_ip_prefix_length} allow" "172.17.0.0/16 allow" ]; }; - forward-zone = [ + stub-zone = [ # Forward .consul queries to Consul daemon { name = "consul."; - forward-addr = "${cfg.lan_ip}@8600"; - forward-no-cache = true; - forward-tcp-upstream = false; - forward-tls-upstream = false; - } - # Forward all queries to our ISP's nameserver - { - name = "."; - forward-addr = cfg.nameservers; - forward-first = true; + stub-addr = "${clusterAddress}@8600"; + stub-no-cache = true; + stub-tcp-upstream = false; + stub-tls-upstream = false; } ]; }; resolveLocalQueries = true; }; - # Reach Unbound through the IP of our LAN interface, - # instead of 127.0.0.1 (this will also work in Docker containers) - networking.nameservers = [ # TODO remove this ? - cfg.lan_ip - ]; services.resolved.enable = false; # Configure Wireguard VPN between all nodes networking.wireguard.interfaces.wg0 = { - ips = [ "${cfg.cluster_ip}/16" ]; - listenPort = cfg.wireguard_port; + ips = [ "${clusterAddress}/16" ]; + listenPort = cfg.wireguardPort; privateKeyFile = "/var/lib/deuxfleurs/wireguard-keys/private"; mtu = 1420; }; @@ -247,28 +212,24 @@ in gossipSecretFile = "/var/lib/wgautomesh/gossip_secret"; persistFile = "/var/lib/wgautomesh/state"; 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)) + if clusterNodeCfg.endpoint != null then + strings.toInt (lists.last (split ":" clusterNodeCfg.endpoint)) else null; - peers = map ({ publicKey, endpoint, IP, ... }: { - address = IP; + peers = attrValues (mapAttrs (hostname: { publicKey, endpoint, address, ... }: { + inherit address endpoint; pubkey = publicKey; - endpoint = endpoint; - }) cfg.cluster_nodes; + }) cfg.clusterNodes); }; # 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 = [ "${cfg.cluster_ip}/16" ]; - # listenPort = cfg.wireguard_port; + # address = [ "${clusterAddress}/16" ]; + # listenPort = cfg.wireguardPort; # privateKeyFile = "/var/lib/deuxfleurs/wireguard-keys/private"; # mtu = 1420; - # peers = map ({ publicKey, endpoint, IP, ... }: { + # peers = map ({ publicKey, endpoint, address, ... }: { # inherit publicKey endpoint; - # allowedIPs = [ "${IP}/32" ]; + # allowedIPs = [ "${address}/32" ]; # persistentKeepalive = 25; # }; @@ -282,25 +243,25 @@ in ''; # Configure /etc/hosts to link all hostnames to their Wireguard IP - networking.extraHosts = builtins.concatStringsSep "\n" (map - ({ hostname, IP, ...}: "${IP} ${hostname}") - cfg.cluster_nodes); + networking.extraHosts = concatStringsSep "\n" (attrValues (mapAttrs + (hostname: { address, ...}: "${address} ${hostname}") + cfg.clusterNodes)); # Enable Hashicorp Consul & Nomad services.consul.enable = true; systemd.services.consul.after = [ "wg-quick-wg0.service" ]; services.consul.extraConfig = - (if cfg.is_raft_server + (if cfg.isRaftServer then { server = true; } // (if cfg.bootstrap then { bootstrap_expect = 3; } else {}) else {}) // { inherit node_meta; - datacenter = cfg.cluster_name; + datacenter = cfg.clusterName; ui_config = { enabled = true; }; - bind_addr = "${cfg.cluster_ip}"; + bind_addr = "${clusterAddress}"; addresses = { https = "0.0.0.0"; @@ -321,9 +282,6 @@ in verify_outgoing = true; verify_server_hostname = true; }; - systemd.services.consul.serviceConfig = { # TODO remove this ? - AmbientCapabilities = "CAP_NET_BIND_SERVICE"; - }; services.nomad.enable = true; systemd.services.nomad.after = [ "wg-quick-wg0.service" ]; @@ -333,18 +291,18 @@ in pkgs.zstd ]; services.nomad.settings = - (if cfg.is_raft_server + (if cfg.isRaftServer then { server = { enabled = true; } // (if cfg.bootstrap then { bootstrap_expect = 3; } else {}); } else {}) // { - region = cfg.cluster_name; - datacenter = cfg.site_name; + region = cfg.clusterName; + datacenter = cfg.siteName; advertise = { - rpc = "${cfg.cluster_ip}"; - http = "${cfg.cluster_ip}"; - serf = "${cfg.cluster_ip}"; + rpc = "${clusterAddress}"; + http = "${clusterAddress}"; + serf = "${clusterAddress}"; }; consul = { address = "localhost:8501"; @@ -397,31 +355,32 @@ in allowedTCPPorts = [ # Allow anyone to connect on SSH port - (builtins.head ({ openssh.ports = [22]; } // config.services).openssh.ports) + (head ({ openssh.ports = [22]; } // config.services).openssh.ports) ]; allowedUDPPorts = [ # Allow peers to connect to Wireguard - cfg.wireguard_port + cfg.wireguardPort ]; # 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 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 # 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 ${cfg.cluster_prefix}/${toString cfg.cluster_prefix_length} -j ACCEPT + iptables -A INPUT -s ${cfg.clusterPrefix} -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 192.168.0.0/16 -p udp --sport 1900 -j ACCEPT iptables -D INPUT -s 172.17.0.0/16 -j ACCEPT - iptables -D INPUT -s ${cfg.cluster_prefix}/${toString cfg.cluster_prefix_length} -j ACCEPT + iptables -D INPUT -s ${cfg.clusterPrefix} -j ACCEPT ''; }; }; diff --git a/nix/remote-unlock.nix b/nix/remote-unlock.nix index 2975a94..3c3e4c8 100644 --- a/nix/remote-unlock.nix +++ b/nix/remote-unlock.nix @@ -1,24 +1,43 @@ { config, pkgs, ... }: + +let + cfg = config.deuxfleurs.remoteUnlock; +in with builtins; with pkgs.lib; { + options.deuxfleurs.remoteUnlock = { + networkInterface = mkOption { + description = "Network interface to configure with static IP"; + type = types.str; + }; + staticIP = mkOption { + description = "IP address (with prefix length) of this node on the local network interface"; + type = types.str; + }; + defaultGateway = mkOption { + description = "IP address of default gateway"; + type = types.str; + }; + }; + config = { boot.initrd.availableKernelModules = [ "pps_core" "ptp" "e1000e" ]; boot.initrd.network.enable = true; boot.initrd.network.ssh = { enable = true; port = 222; - authorizedKeys = concatLists (mapAttrsToList (name: user: user) config.deuxfleurs.admin_accounts); + authorizedKeys = concatLists (mapAttrsToList (name: user: user) config.deuxfleurs.adminAccounts); hostKeys = [ "/var/lib/deuxfleurs/remote-unlock/ssh_host_ed25519_key" ]; }; boot.initrd.network.postCommands = '' - ip addr add ${config.deuxfleurs.lan_ip}/${toString config.deuxfleurs.lan_ip_prefix_length} dev ${config.deuxfleurs.network_interface} - ip link set dev ${config.deuxfleurs.network_interface} up - ip route add default via ${config.deuxfleurs.lan_default_gateway} dev ${config.deuxfleurs.network_interface} + ip addr add ${cfg.staticIP} dev ${cfg.networkInterface} + ip link set dev ${cfg.networkInterface} up + ip route add default via ${cfg.defaultGateway} dev ${cfg.networkInterface} ip a ip route - ping -c 4 ${config.deuxfleurs.lan_default_gateway} + ping -c 4 ${cfg.defaultGateway} echo 'echo run cryptsetup-askpass to unlock drives' >> /root/.profile ''; }; |