Merge branch 'tv' into master

4 files changed, 419 insertions, 0 deletions

diff --git a/tv/modules/consul.nix b/tv/modules/consul.nix
new file mode 100644
index 000000000..83a430c2f
--- /dev/null
+++ b/tv/modules/consul.nix
@@ -0,0 +1,118 @@
+{ config, lib, pkgs, ... }:
+
+# if quorum gets lost, then start any node with a config that doesn't contain bootstrap_expect
+# but -bootstrap
+# TODO consul-bootstrap HOST  that actually does is
+# TODO tools to inspect state of a cluster in outage state
+
+with import ../lib { inherit lib pkgs; };
+let
+  cfg = config.tv.consul;
+
+  out = {
+    options.tv.consul = api;
+    config = mkIf cfg.enable (mkMerge [
+      imp
+      { tv.iptables.input-retiolum-accept-new-tcp = [ "8300" "8301" ]; }
+      # TODO udp for 8301
+    ]);
+  };
+
+  api = {
+    enable = mkEnableOption "tv.consul";
+
+    dc = mkOption {
+      type = types.label;
+    };
+    hosts = mkOption {
+      type = with types; listOf host;
+    };
+    encrypt-file = mkOption {
+      type = types.str; # TODO path (but not just into store)
+      default = "/root/src/secrets/consul-encrypt.json";
+    };
+    data-dir = mkOption {
+      type = types.str; # TODO path (but not just into store)
+      default = "/var/lib/consul";
+    };
+    self = mkOption {
+      type = types.host;
+    };
+    server = mkOption {
+      type = types.bool;
+      default = false;
+    };
+    GOMAXPROCS = mkOption {
+      type = types.int;
+      default = cfg.self.cores;
+    };
+  };
+
+  consul-config = {
+    datacenter = cfg.dc;
+    data_dir = cfg.data-dir;
+    log_level = "INFO";
+    #node_name =
+    server = cfg.server;
+    enable_syslog = true;
+    retry_join =
+      # TODO allow consul in other nets than retiolum [maybe]
+      concatMap (host: host.nets.retiolum.addrs)
+                (filter (host: host.name != cfg.self.name) cfg.hosts);
+    leave_on_terminate = true;
+  } // optionalAttrs cfg.server {
+    bootstrap_expect = length cfg.hosts;
+    leave_on_terminate = false;
+  };
+
+  imp = {
+    environment.systemPackages = with pkgs; [
+      consul
+    ];
+
+    systemd.services.consul = {
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      path = with pkgs; [
+        consul
+      ];
+      environment = {
+        GOMAXPROCS = toString cfg.GOMAXPROCS;
+      };
+      serviceConfig = {
+        PermissionsStartOnly = "true";
+        SyslogIdentifier = "consul";
+        User = user.name;
+        PrivateTmp = "true";
+        Restart = "always";
+        ExecStartPre = pkgs.writeScript "consul-init" ''
+          #! /bin/sh
+          mkdir -p ${cfg.data-dir}
+          chown ${user.name}: ${cfg.data-dir}
+          install -o ${user.name} -m 0400 ${cfg.encrypt-file} /tmp/encrypt.json
+        '';
+        ExecStart = pkgs.writeScript "consul-service" ''
+          #! /bin/sh
+          set -euf
+          exec >/dev/null
+          exec consul agent \
+            -config-file=${toFile "consul.json" (toJSON consul-config)} \
+            -config-file=/tmp/encrypt.json
+        '';
+        #-node=${cfg.self.fqdn} \
+        #ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user} -D";
+      };
+    };
+
+    users.extraUsers = singleton {
+      inherit (user) name uid;
+    };
+  };
+
+  user = {
+    name = "consul";
+    uid = 2999951406; # genid consul
+  };
+
+in
+out
diff --git a/tv/modules/default.nix b/tv/modules/default.nix
new file mode 100644
index 000000000..bb10d8261
--- /dev/null
+++ b/tv/modules/default.nix
@@ -0,0 +1,9 @@
+_:
+
+{
+  imports = [
+    ./consul.nix
+    ./ejabberd.nix
+    ./iptables.nix
+  ];
+}
diff --git a/tv/modules/ejabberd.nix b/tv/modules/ejabberd.nix
new file mode 100644
index 000000000..2910a9a69
--- /dev/null
+++ b/tv/modules/ejabberd.nix
@@ -0,0 +1,166 @@
+{ config, lib, pkgs, ... }:
+
+with builtins;
+with lib;
+let
+  cfg = config.tv.ejabberd;
+
+  out = {
+    options.tv.ejabberd = api;
+    config = mkIf cfg.enable imp;
+  };
+
+  api = {
+    enable = mkEnableOption "tv.ejabberd";
+
+    certFile = mkOption {
+      type = types.str;
+      default = "/root/src/secrets/ejabberd.pem";
+    };
+
+    hosts = mkOption {
+      type = with types; listOf str;
+    };
+  };
+
+  imp = {
+    environment.systemPackages = [ my-ejabberdctl ];
+
+    systemd.services.ejabberd = {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        Type = "oneshot";
+        RemainAfterExit = "yes";
+        PermissionsStartOnly = "true";
+        SyslogIdentifier = "ejabberd";
+        User = user.name;
+        ExecStartPre = pkgs.writeScript "ejabberd-start" ''
+          #! /bin/sh
+          install -o ${user.name} -m 0400 ${cfg.certFile} /etc/ejabberd/ejabberd.pem
+        '';
+        ExecStart = pkgs.writeScript "ejabberd-service" ''
+          #! /bin/sh
+          ${my-ejabberdctl}/bin/ejabberdctl start
+        '';
+      };
+    };
+
+    users.extraUsers = singleton {
+      inherit (user) name uid;
+      home = "/var/ejabberd";
+      createHome = true;
+    };
+  };
+
+  user = {
+    name = "ejabberd";
+    uid = 3499746127; # genid ejabberd
+  };
+
+  my-ejabberdctl = pkgs.writeScriptBin "ejabberdctl" ''
+    #! /bin/sh
+    set -euf
+    exec env \
+        SPOOLDIR=/var/ejabberd \
+        EJABBERD_CONFIG_PATH=${config-file} \
+      ${pkgs.ejabberd}/bin/ejabberdctl \
+        --logs /var/ejabberd \
+        "$@"
+  '';
+
+  config-file = pkgs.writeText "ejabberd.cfg" ''
+    {loglevel, 3}.
+    {hosts, ${toErlang cfg.hosts}}.
+    {listen,
+     [
+      {5222, ejabberd_c2s, [
+          starttls,
+          {certfile, "/etc/ejabberd/ejabberd.pem"},
+          {access, c2s},
+          {shaper, c2s_shaper},
+          {max_stanza_size, 65536}
+               ]},
+      {5269, ejabberd_s2s_in, [
+             {shaper, s2s_shaper},
+             {max_stanza_size, 131072}
+            ]},
+      {5280, ejabberd_http, [
+           captcha,
+           http_bind,
+           http_poll,
+           web_admin
+          ]}
+     ]}.
+    {s2s_use_starttls, required}.
+    {s2s_certfile, "/etc/ejabberd/ejabberd.pem"}.
+    {auth_method, internal}.
+    {shaper, normal, {maxrate, 1000}}.
+    {shaper, fast, {maxrate, 50000}}.
+    {max_fsm_queue, 1000}.
+    {acl, local, {user_regexp, ""}}.
+    {access, max_user_sessions, [{10, all}]}.
+    {access, max_user_offline_messages, [{5000, admin}, {100, all}]}.
+    {access, local, [{allow, local}]}.
+    {access, c2s, [{deny, blocked},
+             {allow, all}]}.
+    {access, c2s_shaper, [{none, admin},
+              {normal, all}]}.
+    {access, s2s_shaper, [{fast, all}]}.
+    {access, announce, [{allow, admin}]}.
+    {access, configure, [{allow, admin}]}.
+    {access, muc_admin, [{allow, admin}]}.
+    {access, muc_create, [{allow, local}]}.
+    {access, muc, [{allow, all}]}.
+    {access, pubsub_createnode, [{allow, local}]}.
+    {access, register, [{allow, all}]}.
+    {language, "en"}.
+    {modules,
+     [
+      {mod_adhoc,    []},
+      {mod_announce, [{access, announce}]},
+      {mod_blocking,[]},
+      {mod_caps,     []},
+      {mod_configure,[]},
+      {mod_disco,    []},
+      {mod_irc,      []},
+      {mod_http_bind, []},
+      {mod_last,     []},
+      {mod_muc,      [
+          {access, muc},
+          {access_create, muc_create},
+          {access_persistent, muc_create},
+          {access_admin, muc_admin}
+         ]},
+      {mod_offline,  [{access_max_user_messages, max_user_offline_messages}]},
+      {mod_ping,     []},
+      {mod_privacy,  []},
+      {mod_private,  []},
+      {mod_pubsub,   [
+          {access_createnode, pubsub_createnode},
+          {ignore_pep_from_offline, true},
+          {last_item_cache, false},
+          {plugins, ["flat", "hometree", "pep"]}
+         ]},
+      {mod_register, [
+          {welcome_message, {"Welcome!",
+                 "Hi.\nWelcome to this XMPP server."}},
+          {ip_access, [{allow, "127.0.0.0/8"},
+                 {deny, "0.0.0.0/0"}]},
+          {access, register}
+         ]},
+      {mod_roster,   []},
+      {mod_shared_roster,[]},
+      {mod_stats,    []},
+      {mod_time,     []},
+      {mod_vcard,    []},
+      {mod_version,  []}
+     ]}.
+  '';
+
+
+  # XXX this is a placeholder that happens to work the default strings.
+  toErlang = builtins.toJSON;
+
+in
+out
diff --git a/tv/modules/iptables.nix b/tv/modules/iptables.nix
new file mode 100644
index 000000000..cbf49f577
--- /dev/null
+++ b/tv/modules/iptables.nix
@@ -0,0 +1,126 @@
+{ config, lib, pkgs, ... }:
+
+with builtins;
+with lib;
+let
+  cfg = config.tv.iptables;
+
+  out = {
+    options.tv.iptables = api;
+    config = mkIf cfg.enable imp;
+  };
+
+  api = {
+    enable = mkEnableOption "tv.iptables";
+
+    input-internet-accept-new-tcp = mkOption {
+      type = with types; listOf (either int str);
+      default = [];
+    };
+
+    input-retiolum-accept-new-tcp = mkOption {
+      type = with types; listOf (either int str);
+      default = [];
+    };
+  };
+
+  imp = {
+    networking.firewall.enable = false;
+
+    systemd.services.tv-iptables = {
+      description = "tv-iptables";
+      wantedBy = [ "network-pre.target" ];
+      before = [ "network-pre.target" ];
+      after = [ "systemd-modules-load.service" ];
+
+      path = with pkgs; [
+        iptables
+      ];
+
+      restartIfChanged = true;
+
+      serviceConfig = {
+        Type = "simple";
+        RemainAfterExit = true;
+        Restart = "always";
+        ExecStart = "@${startScript} tv-iptables_start";
+      };
+    };
+  };
+
+
+  accept-new-tcp = port:
+    "-p tcp -m tcp --dport ${port} -m conntrack --ctstate NEW -j ACCEPT";
+
+  rules = iptables-version:
+    pkgs.writeText "tv-iptables-rules${toString iptables-version}" ''
+      *nat
+      :PREROUTING ACCEPT [0:0]
+      :INPUT ACCEPT [0:0]
+      :OUTPUT ACCEPT [0:0]
+      :POSTROUTING ACCEPT [0:0]
+      ${concatMapStringsSep "\n" (rule: "-A PREROUTING ${rule}") ([]
+        ++ [
+          "! -i retiolum -p tcp -m tcp --dport 22 -j REDIRECT --to-ports 0"
+          "-p tcp -m tcp --dport 11423 -j REDIRECT --to-ports 22"
+        ]
+      )}
+      COMMIT
+      *filter
+      :INPUT DROP [0:0]
+      :FORWARD DROP [0:0]
+      :OUTPUT ACCEPT [0:0]
+      :Retiolum - [0:0]
+      ${concatMapStringsSep "\n" (rule: "-A INPUT ${rule}") ([]
+        ++ [
+          "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"
+          "-i lo -j ACCEPT"
+        ]
+        ++ map accept-new-tcp (unique (map toString cfg.input-internet-accept-new-tcp))
+        ++ ["-i retiolum -j Retiolum"]
+      )}
+      ${concatMapStringsSep "\n" (rule: "-A Retiolum ${rule}") ([]
+        ++ {
+          ip4tables = [
+            "-p icmp -m icmp --icmp-type echo-request -j ACCEPT"
+          ];
+          ip6tables = [
+            "-p ipv6-icmp -m icmp6 --icmpv6-type echo-request -j ACCEPT"
+          ];
+        }."ip${toString iptables-version}tables"
+        ++ map accept-new-tcp (unique (map toString cfg.input-retiolum-accept-new-tcp))
+        ++ {
+          ip4tables = [
+            "-p tcp -j REJECT --reject-with tcp-reset"
+            "-p udp -j REJECT --reject-with icmp-port-unreachable"
+            "-j REJECT --reject-with icmp-proto-unreachable"
+          ];
+          ip6tables = [
+            "-p tcp -j REJECT --reject-with tcp-reset"
+            "-p udp -j REJECT --reject-with icmp6-port-unreachable"
+            "-j REJECT"
+          ];
+        }."ip${toString iptables-version}tables"
+      )}
+      COMMIT
+    '';
+
+  startScript = pkgs.writeScript "tv-iptables_start" ''
+    #! /bin/sh
+    set -euf
+    iptables-restore < ${rules 4}
+    ip6tables-restore < ${rules 6}
+  '';
+
+in
+out
+
+#let
+#  cfg = config.tv.iptables;
+#  arg' = arg // { inherit cfg; };
+#in
+#
+#{
+#  options.tv.iptables = import ./options.nix arg';
+#  config = lib.mkIf cfg.enable (import ./config.nix arg');
+#}