stockholm/krebs/3modules/ssh.nix

87 lines
2.7 KiB
Nix

{ config, lib, ... }:
with lib;
let
cfg = config.krebs;
out = {
config = lib.mkIf cfg.enable imp;
};
imp = lib.mkMerge [
{
services.openssh.hostKeys =
let inherit (config.krebs.build.host.ssh) privkey; in
mkIf (privkey != null) [privkey];
services.openssh.knownHosts =
filterAttrs
(knownHostName: knownHost:
knownHost.publicKey != null &&
knownHost.hostNames != []
)
(mapAttrs
(hostName: host: {
hostNames =
concatLists
(mapAttrsToList
(netName: net:
let
aliases =
concatLists [
shortAliases
net.aliases
net.addrs
];
shortAliases =
optionals
(cfg.dns.search-domain != null)
(map (removeSuffix ".${cfg.dns.search-domain}")
(filter (hasSuffix ".${cfg.dns.search-domain}")
net.aliases));
addPort = alias:
if net.ssh.port != 22
then "[${alias}]:${toString net.ssh.port}"
else alias;
in
map addPort aliases
)
host.nets);
publicKey = host.ssh.pubkey;
})
(foldl' mergeAttrs {} [
cfg.hosts
{
localhost = {
nets.local = {
addrs = [ "127.0.0.1" "::1" ];
aliases = [ "localhost" ];
ssh.port = 22;
};
ssh.pubkey = config.krebs.build.host.ssh.pubkey;
};
}
]));
programs.ssh.extraConfig = concatMapStrings
(net: ''
Host ${toString (net.aliases ++ net.addrs)}
Port ${toString net.ssh.port}
'')
(filter
(net: net.ssh.port != 22)
(concatMap (host: attrValues host.nets)
(mapAttrsToList
(_: host: recursiveUpdate host
(optionalAttrs (cfg.dns.search-domain != null &&
hasAttr cfg.dns.search-domain host.nets) {
nets."" = host.nets.${cfg.dns.search-domain} // {
aliases = [host.name];
addrs = [];
};
}))
config.krebs.hosts)));
}
];
in out