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-rw-r--r--krebs/3modules/ssh.nix109
1 files changed, 109 insertions, 0 deletions
diff --git a/krebs/3modules/ssh.nix b/krebs/3modules/ssh.nix
new file mode 100644
index 000000000..58f3a3c10
--- /dev/null
+++ b/krebs/3modules/ssh.nix
@@ -0,0 +1,109 @@
+{ config, lib, ... }:
+with lib;
+let
+ cfg = config.krebs;
+
+ out = {
+ options.krebs = api;
+ config = lib.mkIf cfg.enable imp;
+ };
+
+ api = {
+ zone-head-config = mkOption {
+ type = with types; attrsOf str;
+ description = ''
+ The zone configuration head which is being used to create the
+ zone files. The string for each key is pre-pended to the zone file.
+ '';
+ # TODO: configure the default somewhere else,
+ # maybe use krebs.dns.providers
+ default = {
+
+ # github.io -> 192.30.252.154
+ "krebsco.de" = ''
+ $TTL 86400
+ @ IN SOA dns19.ovh.net. tech.ovh.net. (2015052000 86400 3600 3600000 86400)
+ IN NS ns19.ovh.net.
+ IN NS dns19.ovh.net.
+ '';
+ };
+ };
+ };
+
+ imp = lib.mkMerge [
+ {
+ services.openssh.hostKeys =
+ let inherit (config.krebs.build.host.ssh) privkey; in
+ mkIf (privkey != null) [privkey];
+
+ services.openssh.knownHosts =
+ filterAttrs
+ (knownHostName: knownHost:
+ knownHost.publicKey != null &&
+ knownHost.hostNames != []
+ )
+ (mapAttrs
+ (hostName: host: {
+ hostNames =
+ concatLists
+ (mapAttrsToList
+ (netName: net:
+ let
+ aliases =
+ concatLists [
+ shortAliases
+ net.aliases
+ net.addrs
+ ];
+ shortAliases =
+ optionals
+ (cfg.dns.search-domain != null)
+ (map (removeSuffix ".${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