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nixcfg
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Allow for IPv6 with RA disabled by manually providing gateway

This commit is contained in:
Alex 2023-04-05 13:20:17 +02:00
parent cb8d7e92d2
commit dec4ea479d
6 changed files with 59 additions and 38 deletions
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2
cluster/staging/node/carcajou.nix
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@ -20,7 +20,7 @@
boot.loader.efi.canTouchEfiVariables = true;
deuxfleurs.hostName = "carcajou";
deuxfleurs.ipv6Address = "2001:910:1204:1::22";
deuxfleurs.staticIPv6.address = "2001:910:1204:1::22";
system.stateVersion = "21.05";
}

2
cluster/staging/node/caribou.nix
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@ -9,7 +9,7 @@
boot.loader.efi.canTouchEfiVariables = true;
deuxfleurs.hostName = "caribou";
deuxfleurs.ipv6Address = "2001:910:1204:1::23";
deuxfleurs.staticIPv6.address = "2001:910:1204:1::23";
deuxfleurs.isRaftServer = true;
system.stateVersion = "21.05";

2
cluster/staging/node/df-pw5.nix
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@ -11,7 +11,7 @@
deuxfleurs.hostName = "df-pw5";
deuxfleurs.staticIPv4.address = "192.168.5.130/24";
deuxfleurs.ipv6Address = "2a02:a03f:6510:5102:223:24ff:feb0:e8a7";
deuxfleurs.staticIPv6.address = "2a02:a03f:6510:5102:223:24ff:feb0:e8a7";
system.stateVersion = "22.11";
}

2
cluster/staging/node/origan.nix
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@ -10,7 +10,7 @@
deuxfleurs.hostName = "origan";
deuxfleurs.staticIPv4.address = "192.168.1.33/24";
deuxfleurs.ipv6Address = "2a01:e0a:5e4:1d0:223:24ff:feaf:fdec";
deuxfleurs.staticIPv6.address = "2a01:e0a:5e4:1d0:223:24ff:feaf:fdec";
deuxfleurs.isRaftServer = true;
system.stateVersion = "22.11";

2
cluster/staging/node/piranha.nix
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@ -10,7 +10,7 @@
deuxfleurs.hostName = "piranha";
deuxfleurs.staticIPv4.address = "192.168.1.25/24";
deuxfleurs.ipv6Address = "2a01:cb05:9142:7400:223:24ff:feb0:ea82";
deuxfleurs.staticIPv6.address = "2a01:cb05:9142:7400:223:24ff:feb0:ea82";
deuxfleurs.isRaftServer = true;
system.stateVersion = "22.11";

87
nix/deuxfleurs.nix
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@ -12,16 +12,15 @@ in
description = "Node name";
type = str;
};
ipv6Address = mkOption {
description = "Static public IPv6 address of this node";
type = str;
};
staticIPv4.address = mkOption {
description = "IP address (with prefix length) of this node on the local network interface";
type = nullOr str;
default = null;
};
staticIPv6.address = mkOption {
description = "Static public IPv6 address of this node";
type = str;
};
isRaftServer = mkOption {
description = "Make this node a RAFT server for the Nomad and Consul deployments";
type = bool;
@ -38,6 +37,19 @@ in
type = nullOr str;
default = null;
};
staticIPv6.defaultGateway = mkOption {
description = ''
IPv6 address of the default route on the local network interface.
IPv6 Router Advertisements (RA) will be totally disabled.
'';
type = nullOr str;
default = null;
};
staticIPv6.prefixLength = mkOption {
description = "IPv6 prefix length";
type = int;
default = 64;
};
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";
@ -112,7 +124,7 @@ in
clusterAddress = clusterNodeCfg.address;
node_meta = {
"site" = cfg.siteName;
"public_ipv6" = cfg.ipv6Address;
"public_ipv6" = cfg.staticIPv6.address;
} //
(if cfg.publicIPv4 != null
then { "public_ipv4" = cfg.publicIPv4; }
@ -134,37 +146,46 @@ in
# Configure network interfaces
networking.useDHCP = false;
networking.useNetworkd = true;
systemd.network.networks = {
"10-uplink" = {
matchConfig = {
Name = "en* eth*";
};
ipv6AcceptRAConfig = {
Token = "static:${cfg.ipv6Address}";
UseDNS = false;
};
} // (if cfg.staticIPv4.address == null || cfg.staticIPv4.defaultGateway == null then {
networkConfig = {
DHCP = "ipv4";
};
dhcpV4Config = {
UseDNS = false;
};
} else {
address = [
"${cfg.staticIPv4.address}"
];
routes = [
{
systemd.network.networks."10-uplink" =
let
dyn_v4 = cfg.staticIPv4.address == null || cfg.staticIPv4.defaultGateway == null;
dyn_v6 = cfg.staticIPv6.defaultGateway == null;
in
{
matchConfig.Name = "en* eth*";
address =
optional (!dyn_v4) "${cfg.staticIPv4.address}"
++ optional (!dyn_v6) "${cfg.staticIPv6.address}/${toString cfg.staticIPv6.prefixLength}";
routes =
optional (!dyn_v4) {
routeConfig = {
Gateway = cfg.staticIPv4.defaultGateway;
# GatewayOnLink - Takes a boolean. If set to true, the kernel does not have to check if the gateway is reachable directly by the current machine (i.e., attached to the local network), so that we can insert the route in the kernel table without it being complained about. Defaults to "no".
GatewayOnLink = true;
};
}
];
});
};
} ++ optional (!dyn_v6) {
routeConfig = {
Gateway = cfg.staticIPv6.defaultGateway;
GatewayOnLink = true;
};
};
# Dynamic IPv4: enable DHCP but not for DNS servers
networkConfig.DHCP = mkIf dyn_v4 "ipv4";
dhcpV4Config.UseDNS = mkIf dyn_v4 false;
# Dynamic IPv6: only fetch default route, use static
# address and no DNS servers
ipv6AcceptRAConfig.Token = mkIf dyn_v6 "static:${cfg.staticIPv6.address}";
ipv6AcceptRAConfig.UseDNS = mkIf dyn_v6 false;
# Static IPv6: disable all router advertisements and
# link-local addresses
networkConfig.IPv6AcceptRA = mkIf (!dyn_v6) false;
networkConfig.LinkLocalAddressing = mkIf (!dyn_v6) "no";
};
# Configure Unbound as a central DNS server for everything
# - is its own recursor (applies DNSSec) for everything,
@ -211,7 +232,7 @@ in
gossipPort = 1666;
gossipSecretFile = "/var/lib/wgautomesh/gossip_secret";
persistFile = "/var/lib/wgautomesh/state";
upnpForwardPublicPort =
upnpForwardPublicPort =
if clusterNodeCfg.endpoint != null then
strings.toInt (lists.last (split ":" clusterNodeCfg.endpoint))
else null;