Merge branch 'master' of prism.r:stockholm

33 files changed, 687 insertions, 263 deletions

diff --git a/krebs/1systems/hotdog/config.nix b/krebs/1systems/hotdog/config.nix
index cf72e0d7..91607337 100644
--- a/krebs/1systems/hotdog/config.nix
+++ b/krebs/1systems/hotdog/config.nix
@@ -12,8 +12,8 @@
     <stockholm/krebs/2configs/buildbot-stockholm.nix>
     <stockholm/krebs/2configs/binary-cache/nixos.nix>
     <stockholm/krebs/2configs/ircd.nix>
-    <stockholm/krebs/2configs/reaktor-retiolum.nix>
-    <stockholm/krebs/2configs/reaktor-krebs.nix>
+    <stockholm/krebs/2configs/nscd-fix.nix>
+    <stockholm/krebs/2configs/reaktor2.nix>
     <stockholm/krebs/2configs/repo-sync.nix>
   ];
 
diff --git a/krebs/1systems/wolf/config.nix b/krebs/1systems/wolf/config.nix
index 914b3805..ec883071 100644
--- a/krebs/1systems/wolf/config.nix
+++ b/krebs/1systems/wolf/config.nix
@@ -161,6 +161,7 @@ in
 
   users.extraUsers.root.openssh.authorizedKeys.keys = [
     config.krebs.users.ulrich.pubkey
+    config.krebs.users.raute.pubkey
     config.krebs.users.makefu-omo.pubkey
     "ssh-rsa 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 root@plattenschwein" # for backup
   ];
diff --git a/krebs/2configs/exim-smarthost.nix b/krebs/2configs/exim-smarthost.nix
new file mode 100644
index 00000000..5dc24f1d
--- /dev/null
+++ b/krebs/2configs/exim-smarthost.nix
@@ -0,0 +1,50 @@
+with import <stockholm/lib>;
+{ config, ... }: let
+
+  format = from: to: {
+    inherit from;
+    # TODO assert is-retiolum-mail-address to;
+    to = concatMapStringsSep "," (getAttr "mail") (toList to);
+  };
+
+in {
+  krebs.exim-smarthost.internet-aliases =
+    mapAttrsToList format (with config.krebs.users; let
+      brain-ml = [
+        lass
+        makefu
+        tv
+      ];
+      eloop-ml = spam-ml ++ [ ciko ];
+      spam-ml = [
+        lass
+        makefu
+        tv
+      ];
+      ciko.mail = "ciko@slash16.net";
+    in {
+      "anmeldung@eloop.org" = eloop-ml;
+      "brain@krebsco.de" = brain-ml;
+      "cfp@eloop.org" = eloop-ml;
+      "kontakt@eloop.org" = eloop-ml;
+      "root@eloop.org" = eloop-ml;
+      "youtube@eloop.org" = eloop-ml;
+      "eloop2016@krebsco.de" = eloop-ml;
+      "eloop2017@krebsco.de" = eloop-ml;
+      "postmaster@krebsco.de" = spam-ml; # RFC 822
+      "lass@krebsco.de" = lass;
+      "makefu@krebsco.de" = makefu;
+      "spam@krebsco.de" = spam-ml;
+      "tv@krebsco.de" = tv;
+      # XXX These are no internet aliases
+      # XXX exim-retiolum hosts should be able to relay to retiolum addresses
+      "lass@retiolum" = lass;
+      "makefu@retiolum" = makefu;
+      "spam@retiolum" = spam-ml;
+      "tv@retiolum" = tv;
+      "lass@r" = lass;
+      "makefu@r" = makefu;
+      "spam@r" = spam-ml;
+      "tv@r" = tv;
+    });
+}
diff --git a/krebs/2configs/nscd-fix.nix b/krebs/2configs/nscd-fix.nix
new file mode 100644
index 00000000..8e5909e7
--- /dev/null
+++ b/krebs/2configs/nscd-fix.nix
@@ -0,0 +1,24 @@
+with import <stockholm/lib>;
+{ pkgs, ... }: let
+
+  enable = versionOlderThan "19.03";
+
+  versionOlderThan = v:
+    compareVersions
+      (versions.majorMinor version)
+      (versions.majorMinor v)
+      == -1;
+
+  warning = ''
+    Using custom services.nscd.config because
+    https://github.com/NixOS/nixpkgs/pull/50316
+  '';
+
+in
+  optionalAttrs enable (trace warning {
+    services.nscd.enable = mkForce true;
+    services.nscd.config = mkForce (readFile (pkgs.fetchurl {
+      url = https://raw.githubusercontent.com/arianvp/nixpkgs/1d5f4cb/nixos/modules/services/system/nscd.conf;
+      sha256 = "1jlddk38lyynjn51zx3xi1nc29ahajyh0qg48qbq6dqlsrn3wxqs";
+    }));
+  })
diff --git a/krebs/2configs/reaktor-krebs.nix b/krebs/2configs/reaktor-krebs.nix
deleted file mode 100644
index dc2838ca..00000000
--- a/krebs/2configs/reaktor-krebs.nix
+++ /dev/null
@@ -1,30 +0,0 @@
-{ config, lib, pkgs, ... }:
-with import <stockholm/lib>;
-
-{
-  krebs.Reaktor.krebs = {
-    nickname = "Reaktor|krebs";
-    channels = [
-      "#krebs"
-      "#nixos-wiki"
-    ];
-    extraEnviron = {
-      REAKTOR_HOST = "irc.freenode.org";
-      REAKTOR_NICKSERV_PASSWORD = "/var/lib/Reaktor/reaktor_nickserv_password";
-    };
-    plugins = with pkgs.ReaktorPlugins; [
-      sed-plugin
-      task-add
-      task-delete
-      task-done
-      task-list
-    ] ++
-      (attrValues (todo "agenda"))
-    ;
-  };
-  krebs.secret.files.nix-serve-key = {
-    path = "/var/lib/Reaktor/reaktor_nickserv_password";
-    owner.name = "Reaktor";
-    source-path = toString <secrets> + "/reaktor_nickserv_password";
-  };
-}
diff --git a/krebs/2configs/reaktor-retiolum.nix b/krebs/2configs/reaktor-retiolum.nix
deleted file mode 100644
index 824f59d0..00000000
--- a/krebs/2configs/reaktor-retiolum.nix
+++ /dev/null
@@ -1,21 +0,0 @@
-{ config, lib, pkgs, ... }:
-with import <stockholm/lib>;
-
-{
-  krebs.Reaktor.retiolum = {
-    nickname = "Reaktor|lass";
-    channels = [ "#noise" "#xxx" ];
-    extraEnviron = {
-      REAKTOR_HOST = "irc.r";
-    };
-    plugins = with pkgs.ReaktorPlugins; [
-      sed-plugin
-      task-add
-      task-delete
-      task-done
-      task-list
-    ] ++
-      (attrValues (todo "agenda"))
-    ;
-  };
-}
diff --git a/krebs/2configs/reaktor2.nix b/krebs/2configs/reaktor2.nix
new file mode 100644
index 00000000..ff6b539b
--- /dev/null
+++ b/krebs/2configs/reaktor2.nix
@@ -0,0 +1,152 @@
+with import <stockholm/lib>;
+{ config, pkgs, ... }:
+
+let
+  #for shared state directory
+  stateDir = config.krebs.reaktor2.r.stateDir;
+
+  generators = pkgs.reaktor2-plugins.generators;
+  hooks = pkgs.reaktor2-plugins.hooks;
+  commands = pkgs.reaktor2-plugins.commands;
+
+  task = name: let
+    rcFile = builtins.toFile "taskrc" ''
+      confirmation=no
+    '';
+  in {
+    pattern = "^${name}-([a-z]+)(?::\\s*(.*))?";
+    activate = "match";
+    command = 1;
+    arguments = [2];
+    env.TASKDATA = "${stateDir}/${name}";
+    commands = {
+      add.filename = pkgs.writeDash "${name}-task-add" ''
+        ${pkgs.taskwarrior}/bin/task rc:${rcFile} add "$1"
+      '';
+      list.filename = pkgs.writeDash "${name}-task-list" ''
+        ${pkgs.taskwarrior}/bin/task rc:${rcFile} export \
+          | ${pkgs.jq}/bin/jq -r '
+              .[] | select(.id != 0) | "\(.id) \(.description)"
+            '
+      '';
+      delete.filename = pkgs.writeDash "${name}-task-delete" ''
+        ${pkgs.taskwarrior}/bin/task rc:${rcFile} delete "$1"
+      '';
+      done.filename = pkgs.writeDash "${name}-task-done" ''
+        ${pkgs.taskwarrior}/bin/task rc:${rcFile} done "$1"
+      '';
+    };
+  };
+
+  systemPlugin = {
+    plugin = "system";
+    config = {
+      workdir = stateDir;
+      hooks.JOIN = [
+        {
+          activate = "always";
+          command = {
+            filename =
+              "${pkgs.Reaktor.src}/reaktor/commands/tell-on_join";
+            env = {
+              PATH = makeBinPath [
+                pkgs.coreutils # XXX env, touch
+                pkgs.jq # XXX sed
+                pkgs.utillinux # XXX flock
+              ];
+              state_file = "${stateDir}/tell.json";
+            };
+          };
+        }
+      ];
+      hooks.PRIVMSG = [
+        {
+          pattern = "^bier bal(ance)*$";
+          activate = "match";
+          command = {
+            env = {
+              state_file = "${stateDir}/ledger";
+            };
+            filename = pkgs.writeDash "bier-balance" ''
+              ${pkgs.hledger}/bin/hledger -f $state_file bal -N -O csv \
+                | ${pkgs.coreutils}/bin/tail +2 \
+                | ${pkgs.miller}/bin/mlr --icsv --opprint cat
+            '';
+          };
+        }
+        {
+          pattern = ''^(\S+)\s+([+-][1-9][0-9]*)\s+(\S+)$'';
+          activate = "match";
+          arguments = [1 2 3];
+          command = {
+            env = {
+              # TODO; get state as argument
+              state_file = "${stateDir}/ledger";
+            };
+            filename = pkgs.writeDash "ledger-add" ''
+              set -x
+              tonick=$1
+              amt=$2
+              unit=$3
+              printf '%s\n  %s  %d %s\n  %s  %d %s\n' "$(date -Id)" "$tonick" "$amt" "$unit" "$_from" "$(expr 0 - "''${amt#+}")" "$unit" >> $state_file
+            '';
+          };
+        }
+        hooks.sed
+        (generators.command_hook {
+          inherit (commands) hello random-emoji nixos-version stockholm-issue;
+          tell = {
+            filename =
+              "${pkgs.Reaktor.src}/reaktor/commands/tell-on_privmsg";
+            env = {
+              PATH = makeBinPath [
+                pkgs.coreutils # XXX date, env
+                pkgs.jq # XXX sed
+                pkgs.utillinux # XXX flock
+              ];
+              state_file = "${stateDir}/tell.txt";
+            };
+          };
+        })
+        (task "agenda")
+      ];
+    };
+  };
+
+in {
+
+  krebs.reaktor2 = {
+    freenode = {
+      hostname = "irc.freenode.org";
+      nick = "reaktor2|krebs";
+      plugins = [
+        {
+          plugin = "register";
+          config = {
+            channels = [
+              "#krebs"
+            ];
+          };
+        }
+        systemPlugin
+      ];
+      username = "reaktor2";
+    };
+    r = {
+      nick = "reaktor2|krebs";
+      plugins = [
+        {
+          plugin = "register";
+          config = {
+            channels = [
+              "#noise"
+              "#xxx"
+            ];
+          };
+        }
+        systemPlugin
+      ];
+      username = "reaktor2";
+    };
+  };
+}
diff --git a/krebs/2configs/shack/mobile.mpd.nix b/krebs/2configs/shack/mobile.mpd.nix
index 2dc466ed..751d233e 100644
--- a/krebs/2configs/shack/mobile.mpd.nix
+++ b/krebs/2configs/shack/mobile.mpd.nix
@@ -1,5 +1,8 @@
 {lib,pkgs, ... }:
 let
+  pkg = lib.overrideDerivation pkgs.ympd (old: {
+      patches = [ ./ympd-top-next.patch ];
+  });
   mpdHost = "mpd.shack";
   ympd = name: port: let
     webPort = 10000 + port;
@@ -7,7 +10,7 @@ let
     systemd.services."ympd-${name}" = {
       description = "mpd for ${name}";
       wantedBy = [ "multi-user.target" ];
-      serviceConfig.ExecStart = "${pkgs.ympd}/bin/ympd --host ${mpdHost} --port ${toString port} --webport ${toString webPort} --user nobody";
+      serviceConfig.ExecStart = "${pkg}/bin/ympd --host ${mpdHost} --port ${toString port} --webport ${toString webPort} --user nobody";
     };
     services.nginx.virtualHosts."mobile.${name}.mpd.shack" = {
       serverAliases = [
diff --git a/krebs/2configs/shack/ympd-top-next.patch b/krebs/2configs/shack/ympd-top-next.patch
new file mode 100644
index 00000000..fd424f11
--- /dev/null
+++ b/krebs/2configs/shack/ympd-top-next.patch
@@ -0,0 +1,16 @@
+diff --git a/htdocs/index.html b/htdocs/index.html
+index ed77279..eaf92b6 100644
+--- a/htdocs/index.html
++++ b/htdocs/index.html
+@@ -76,6 +76,11 @@
+ 
+       <div class="col-md-10 col-xs-12">
+         <div class="notifications top-right"></div>
++
++        <ul class="pager">
++          <li id="prev" class="page-btn hide"><a href="">Previous</a></li>
++          <li id="next" class="page-btn"><a href="">Next</a></li>
++        </ul>
+         
+         <div class="panel panel-primary">
+           <!-- Default panel contents -->
diff --git a/krebs/3modules/Reaktor.nix b/krebs/3modules/Reaktor.nix
index 669483f3..308c6d41 100644
--- a/krebs/3modules/Reaktor.nix
+++ b/krebs/3modules/Reaktor.nix
@@ -113,10 +113,11 @@ let
         '';
       in nameValuePair "Reaktor-${name}" {
         path = with pkgs; [
-          utillinux #flock for tell_on-join
           git # for nag
+          jq # for tell
           python # for caps
-          ];
+          utillinux # flock for tell
+        ];
         description = "Reaktor IRC Bot";
         after = [ "network.target" ];
         wantedBy = [ "multi-user.target" ];
diff --git a/krebs/3modules/default.nix b/krebs/3modules/default.nix
index 2e7c61fb..9303a81f 100644
--- a/krebs/3modules/default.nix
+++ b/krebs/3modules/default.nix
@@ -18,14 +18,17 @@ let
       ./charybdis.nix
       ./ci.nix
       ./current.nix
+      ./dns.nix
       ./exim.nix
       ./exim-retiolum.nix
       ./exim-smarthost.nix
       ./fetchWallpaper.nix
       ./github-hosts-sync.nix
+      ./github-known-hosts.nix
       ./git.nix
       ./go.nix
       ./hidden-ssh.nix
+      ./hosts.nix
       ./htgen.nix
       ./iana-etc.nix
       ./iptables.nix
@@ -39,8 +42,10 @@ let
       ./per-user.nix
       ./power-action.nix
       ./Reaktor.nix
+      ./reaktor2.nix
       ./realwallpaper.nix
       ./retiolum-bootstrap.nix
+      ./retiolum-hosts.nix
       ./rtorrent.nix
       ./secret.nix
       ./setuid.nix
@@ -58,28 +63,10 @@ let
   api = {
     enable = mkEnableOption "krebs";
 
-    dns = {
-      providers = mkOption {
-        type = with types; attrsOf str;
-      };
-    };
-
-    hosts = mkOption {
-      type = with types; attrsOf host;
-      default = {};
-    };
-
     users = mkOption {
       type = with types; attrsOf user;
     };
 
-    # XXX is there a better place to define search-domain?
-    # TODO search-domains :: listOf hostname
-    search-domain = mkOption {
-      type = types.hostname;
-      default = "r";
-    };
-
     sitemap = mkOption {
       default = {};
       type = types.attrsOf types.sitemap.entry;
@@ -125,6 +112,8 @@ let
         w = "hosts";
       };
 
+      krebs.dns.search-domain = mkDefault "r";
+
       krebs.users = {
         krebs = {
           home = "/krebs";
@@ -137,93 +126,6 @@ let
         };
       };
 
-      networking.extraHosts = let
-        domains = attrNames (filterAttrs (_: eq "hosts") cfg.dns.providers);
-        check = hostname: any (domain: hasSuffix ".${domain}" hostname) domains;
-      in concatStringsSep "\n" (flatten (
-        mapAttrsToList (hostname: host:
-          mapAttrsToList (netname: net:
-            let
-              aliases = longs ++ shorts;
-              longs = filter check net.aliases;
-              shorts = let s = ".${cfg.search-domain}"; in
-                map (removeSuffix s) (filter (hasSuffix s) longs);
-            in
-              optionals
-                (aliases != [])
-                (map (addr: "${addr} ${toString aliases}") net.addrs)
-          ) (filterAttrs (name: host: host.aliases != []) host.nets)
-        ) cfg.hosts
-      ));
-
-      # TODO dedup with networking.extraHosts
-      nixpkgs.config.packageOverrides = oldpkgs:
-        let
-          domains = attrNames (filterAttrs (_: eq "hosts") cfg.dns.providers);
-          check = hostname: any (domain: hasSuffix ".${domain}" hostname) domains;
-        in
-          {
-            retiolum-hosts = oldpkgs.writeText "retiolum-hosts" ''
-              ${concatStringsSep "\n" (flatten (
-                map (host:
-                    let
-                      net = host.nets.retiolum;
-                      aliases = longs;
-                      longs = filter check net.aliases;
-                    in
-                      optionals
-                        (aliases != [])
-                        (map (addr: "${addr} ${toString aliases}") net.addrs)
-                ) (filter (host: hasAttr "retiolum" host.nets)
-                          (attrValues cfg.hosts))))}
-            '';
-          };
-
-      krebs.exim-smarthost.internet-aliases = let
-        format = from: to: {
-          inherit from;
-          # TODO assert is-retiolum-mail-address to;
-          to = concatMapStringsSep "," (getAttr "mail") (toList to);
-        };
-      in mapAttrsToList format (with config.krebs.users; let
-        brain-ml = [
-          lass
-          makefu
-          tv
-        ];
-        eloop-ml = spam-ml ++ [ ciko ];
-        spam-ml = [
-          lass
-          makefu
-          tv
-        ];
-        ciko.mail = "ciko@slash16.net";
-      in {
-        "anmeldung@eloop.org" = eloop-ml;
-        "brain@krebsco.de" = brain-ml;
-        "cfp@eloop.org" = eloop-ml;
-        "kontakt@eloop.org" = eloop-ml;
-        "root@eloop.org" = eloop-ml;
-        "youtube@eloop.org" = eloop-ml;
-        "eloop2016@krebsco.de" = eloop-ml;
-        "eloop2017@krebsco.de" = eloop-ml;
-        "postmaster@krebsco.de" = spam-ml; # RFC 822
-        "lass@krebsco.de" = lass;
-        "makefu@krebsco.de" = makefu;
-        "spam@krebsco.de" = spam-ml;
-        "tv@krebsco.de" = tv;
-        # XXX These are no internet aliases
-        # XXX exim-retiolum hosts should be able to relay to retiolum addresses
-        "lass@retiolum" = lass;
-        "makefu@retiolum" = makefu;
-        "spam@retiolum" = spam-ml;
-        "tv@retiolum" = tv;
-        "lass@r" = lass;
-        "makefu@r" = makefu;
-        "spam@r" = spam-ml;
-        "tv@r" = tv;
-      });
-
       services.openssh.hostKeys =
         let inherit (config.krebs.build.host.ssh) privkey; in
         mkIf (privkey != null) (mkForce [privkey]);
@@ -238,31 +140,6 @@ let
             };
           })
         //
-        {
-          github = {
-            hostNames = [
-              "github.com"
-              # List generated with
-              # curl -sS https://api.github.com/meta | jq -r .git[] | cidr2glob
-              "192.30.252.*"
-              "192.30.253.*"
-              "192.30.254.*"
-              "192.30.255.*"
-              "185.199.108.*"
-              "185.199.109.*"
-              "185.199.110.*"
-              "185.199.111.*"
-              "13.229.188.59"
-              "13.250.177.223"
-              "18.194.104.89"
-              "18.195.85.27"
-              "35.159.8.160"
-              "52.74.223.119"
-            ];
-            publicKey = "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==";
-          };
-        }
-        //
         mapAttrs
           (name: host: {
             hostNames =
@@ -272,8 +149,8 @@ let
                     let
                       longs = net.aliases;
                       shorts =
-                        map (removeSuffix ".${cfg.search-domain}")
-                            (filter (hasSuffix ".${cfg.search-domain}")
+                        map (removeSuffix ".${cfg.dns.search-domain}")
+                            (filter (hasSuffix ".${cfg.dns.search-domain}")
                                     longs);
                       add-port = a:
                         if net.ssh.port != 22
@@ -297,8 +174,8 @@ let
           (concatMap (host: attrValues host.nets)
             (mapAttrsToList
               (_: host: recursiveUpdate host
-                (optionalAttrs (hasAttr config.krebs.search-domain host.nets) {
-                  nets."" = host.nets.${config.krebs.search-domain} // {
+                (optionalAttrs (hasAttr cfg.dns.search-domain host.nets) {
+                  nets."" = host.nets.${cfg.dns.search-domain} // {
                     aliases = [host.name];
                     addrs = [];
                   };
diff --git a/krebs/3modules/dns.nix b/krebs/3modules/dns.nix
new file mode 100644
index 00000000..b7e2a2cb
--- /dev/null
+++ b/krebs/3modules/dns.nix
@@ -0,0 +1,12 @@
+with import <stockholm/lib>;
+{
+  options = {
+    krebs.dns.providers = mkOption {
+      type = types.attrsOf types.str;
+    };
+
+    krebs.dns.search-domain = mkOption {
+      type = types.hostname;
+    };
+  };
+}
diff --git a/krebs/3modules/external/default.nix b/krebs/3modules/external/default.nix
index baa49dbe..089113ac 100644
--- a/krebs/3modules/external/default.nix
+++ b/krebs/3modules/external/default.nix
@@ -84,8 +84,8 @@ in {
       nets = rec {
         internet = {
           # eve.thalheim.io
-          ip4.addr = "188.68.39.17";
-          ip6.addr = "2a03:4000:13:31e::1";
+          ip4.addr = "95.216.112.61";
+          ip6.addr = "2a01:4f9:2b:1605::1";
           aliases = [ "eve.i" ];
         };
         retiolum = {
@@ -141,6 +141,29 @@ in {
         };
       };
     };
+    idontcare = {
+      owner = config.krebs.users.Mic92;
+      nets = rec {
+        retiolum = {
+          addrs = [
+            config.krebs.hosts.idontcare.nets.retiolum.ip4.addr
+            config.krebs.hosts.idontcare.nets.retiolum.ip6.addr
+          ];
+          ip4.addr = "10.243.29.177";
+          aliases = [ "idontcare.r" ];
+          tinc.pubkey = ''
+            -----BEGIN RSA PUBLIC KEY-----
+            MIIBCgKCAQEAxmmbQLVXcnCU9Vg9TCoJxfq/RyNfzaTj8XJsn4Kpo3CvQOwFzL6O
+            qZnbG55WjPjPumuFgtUdHA/G8mgtrTVaIRbVE9ck2l2wWFzMWxORzuvDbMh5xP8A
+            OW2Z2qjlH6O9GTBCzpYyHuyBWCjtiN4x9zEqxkIsBARKOylAoy3zQIiiQF0d72An
+            lqKFi9vYUU90zo9rP8BTzx2ZsEWb28xhHUlwf1+vgaOHI1jI99gnr12dVYl/i/Hb
+            O28gDUogfpP/5pWFAHJ+53ZscHo8/Y7imjiKgGXmOHywoXOsKQ67M6ROEU/0xPnw
+            jKmq2p7zTJk2mDhphjePi5idd5yKNX5Q3wIDAQAB
+            -----END RSA PUBLIC KEY-----
+          '';
+        };
+      };
+    };
     justraute = {
       owner = config.krebs.users.raute; # laptop
       nets = {
@@ -344,6 +367,30 @@ in {
         };
       };
     };
+    matchbox = {
+      owner = config.krebs.users.Mic92;
+      nets = {
+        retiolum = {
+          ip4.addr = "10.243.29.176";
+          aliases = [ "matchbox.r" ];
+          tinc.pubkey = ''
+            -----BEGIN RSA PUBLIC KEY-----
+            MIICCgKCAgEAqwB9pzV889vpMp/am+T0sfm5qO/wAWS/tv0auYK3Zyx3ChxrQX2m
+            VrxO5a/bjR/g1fi/t2kJIV/6tsVSRHfzKuKHprE2KxeNOmwUuSjjiM4CboASMR+w
+            nra6U0Ldf5vBxtEj5bj384QxwxxVLhSw8NbE43FCM07swSvAT8Y/ZmGUd738674u
+            TNC6zM6zwLvN0dxCDLuD5bwUq7y73JNQTm2YXv1Hfw3T8XqJK/Xson2Atv2Y5ZbE
+            TA0RaH3PoEkhkVeJG/EuUIJhvmunS5bBjFSiOiUZ8oEOSjo9nHUMD0u+x1BZIg/1
+            yy5B5iB4YSGPAtjMJhwD/LRIoI8msWpdVCCnA+FlKCKAsgC7JbJgcOUtK9eDFdbO
+            4FyzdUJbK+4PDguraPGzIX7p+K3SY8bbyo3SSp5rEb+CEWtFf26oJm7eBhDBT6K4
+            Ofmzp0GjFbS8qkqEGCQcfi4cAsXMVCn4AJ6CKs89y19pLZ42fUtWg7WgUZA7GWV/
+            bPE2RSBMUkGb0ovgoe7Z7NXsL3AST8EQEy+3lAEyUrPFLiwoeGJZmfTDTy1VBFI4
+            nCShp7V+MSmz4DnLK1HLksLVLmGyZmouGsLjYUnEa414EI6NJF3bfEO2ZRGaswyR
+            /vW066YCTe7wi+YrvrMDgkdbyfn/ecMTn2iXsTb4k9/fuO0+hsqL+isCAwEAAQ==
+            -----END RSA PUBLIC KEY-----
+          '';
+        };
+      };
+    };
     miaoski = {
       owner = config.krebs.users.miaoski;
       nets = {
@@ -369,7 +416,7 @@ in {
       pubkey = ssh-for "kmein";
     };
     Mic92 = {
-      mail = "joerg@higgsboson.tk";
+      mail = "joerg@thalheim.io";
       pubkey = ssh-for "Mic92";
     };
     palo = {
diff --git a/krebs/3modules/github-known-hosts.nix b/krebs/3modules/github-known-hosts.nix
new file mode 100644
index 00000000..def06f17
--- /dev/null
+++ b/krebs/3modules/github-known-hosts.nix
@@ -0,0 +1,40 @@
+{
+  services.openssh.knownHosts.github = {
+    hostNames = [
+      "github.com"
+      # List generated with
+      # curl -sS https://api.github.com/meta | jq -r .git[] | nix-shell -p cidr2glob --run cidr2glob | jq -R .
+      "192.30.252.*"
+      "192.30.253.*"
+      "192.30.254.*"
+      "192.30.255.*"
+      "185.199.108.*"
+      "185.199.109.*"
+      "185.199.110.*"
+      "185.199.111.*"
+      "140.82.112.*"
+      "140.82.113.*"
+      "140.82.114.*"
+      "140.82.115.*"
+      "140.82.116.*"
+      "140.82.117.*"
+      "140.82.118.*"
+      "140.82.119.*"
+      "140.82.120.*"
+      "140.82.121.*"
+      "140.82.122.*"
+      "140.82.123.*"
+      "140.82.124.*"
+      "140.82.125.*"
+      "140.82.126.*"
+      "140.82.127.*"
+      "13.229.188.59"
+      "13.250.177.223"
+      "18.194.104.89"
+      "18.195.85.27"
+      "35.159.8.160"
+      "52.74.223.119"
+    ];
+    publicKey = "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==";
+  };
+}
diff --git a/krebs/3modules/hosts.nix b/krebs/3modules/hosts.nix
new file mode 100644
index 00000000..0985bb53
--- /dev/null
+++ b/krebs/3modules/hosts.nix
@@ -0,0 +1,35 @@