I Like To Move It

13 files changed, 2166 insertions, 0 deletions

diff --git a/modules/tv/base-cac-CentOS-7-64bit.nix b/modules/tv/base-cac-CentOS-7-64bit.nix
new file mode 100644
index 000000000..42ab481b3
--- /dev/null
+++ b/modules/tv/base-cac-CentOS-7-64bit.nix
@@ -0,0 +1,27 @@
+{ config, pkgs, ... }:
+
+{
+  boot.loader.grub.device = "/dev/sda";
+  boot.loader.grub.enable = true;
+  boot.loader.grub.version = 2;
+
+  boot.initrd.availableKernelModules = [
+    "ata_piix"
+    "vmw_pvscsi"
+  ];
+
+  fileSystems."/" = {
+    device = "/dev/centos/root";
+    fsType = "xfs";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/sda1";
+    fsType = "xfs";
+  };
+
+  swapDevices = [
+    { device = "/dev/centos/swap"; }
+  ];
+}
+
diff --git a/modules/tv/base.nix b/modules/tv/base.nix
new file mode 100644
index 000000000..76c8b8970
--- /dev/null
+++ b/modules/tv/base.nix
@@ -0,0 +1,17 @@
+{ config, pkgs, ... }:
+
+{
+  time.timeZone = "Europe/Berlin";
+
+  nix.maxJobs = 8;
+  nix.useChroot = true;
+  # TODO check if both are required:
+  nix.chrootDirs = [ "/etc/protocols" pkgs.iana_etc.outPath ];
+
+  nix.trustedBinaryCaches = [
+    "https://cache.nixos.org"
+    "http://cache.nixos.org"
+    "http://hydra.nixos.org"
+  ];
+
+}
diff --git a/modules/tv/ejabberd.nix b/modules/tv/ejabberd.nix
new file mode 100644
index 000000000..e836d2cdd
--- /dev/null
+++ b/modules/tv/ejabberd.nix
@@ -0,0 +1,856 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  inherit (pkgs) ejabberd writeScript writeScriptBin utillinux;
+  inherit (lib) makeSearchPath;
+
+  cfg = config.services.ejabberd-cd;
+
+
+
+in
+
+{
+
+  ####### interface
+
+  options = {
+
+    services.ejabberd-cd = {
+
+      enable = mkOption {
+        default = false;
+        description = "Whether to enable ejabberd server";
+      };
+
+      config = mkOption {
+        type = types.string;
+        default = "";
+        description = ''
+          TODO
+        '';
+      };
+
+      user = mkOption {
+        type = types.string;
+        default = "ejabberd";
+        description = ''
+          TODO
+        '';
+      };
+
+      group = mkOption {
+        type = types.string;
+        default = "ejabberd";
+        description = ''
+          TODO
+        '';
+      };
+
+
+  #    spoolDir = mkOption {
+  #      default = "/var/lib/ejabberd";
+  #      description = "Location of the spooldir of ejabberd";
+  #    };
+
+  #    logsDir = mkOption {
+  #      default = "/var/log/ejabberd";
+  #      description = "Location of the logfile directory of ejabberd";
+  #    };
+
+  #    confDir = mkOption {
+  #      default = "/var/ejabberd";
+  #      description = "Location of the config directory of ejabberd";
+  #    };
+
+  #    virtualHosts = mkOption {
+  #      default = "\"localhost\"";
+  #      description = "Virtualhosts that ejabberd should host. Hostnames are surrounded with doublequotes and separated by commas";
+  #    };
+
+  #    loadDumps = mkOption {
+  #      default = [];
+  #      description = "Configuration dump that should be loaded on the first startup";
+  #      example = literalExample "[ ./myejabberd.dump ]";
+  #    };
+
+  #    config 
+    };
+
+  };
+
+
+  ####### implementation
+
+  config =
+    let
+      my-ejabberdctl = writeScriptBin "ejabberdctl" ''
+        #! /bin/sh
+        set -euf
+        exec env \
+            SPOOLDIR=/var/ejabberd \
+            EJABBERD_CONFIG_PATH=/etc/ejabberd.cfg \
+          ${ejabberd}/bin/ejabberdctl \
+            --logs /var/ejabberd \
+            "$@"
+      '';
+    in
+    mkIf cfg.enable {
+      #environment.systemPackages = [ pkgs.ejabberd ];
+
+      environment = {
+        etc."ejabberd.cfg".text = ''
+          %%%
+          %%%               ejabberd configuration file
+          %%%
+          %%%'
+
+          %%% The parameters used in this configuration file are explained in more detail
+          %%% in the ejabberd Installation and Operation Guide.
+          %%% Please consult the Guide in case of doubts, it is included with
+          %%% your copy of ejabberd, and is also available online at
+          %%% http://www.process-one.net/en/ejabberd/docs/
+
+          %%% This configuration file contains Erlang terms.
+          %%% In case you want to understand the syntax, here are the concepts:
+          %%%
+          %%%  - The character to comment a line is %
+          %%%
+          %%%  - Each term ends in a dot, for example:
+          %%%      override_global.
+          %%%
+          %%%  - A tuple has a fixed definition, its elements are
+          %%%    enclosed in {}, and separated with commas:
+          %%%      {loglevel, 4}.
+          %%%
+          %%%  - A list can have as many elements as you want,
+          %%%    and is enclosed in [], for example:
+          %%%      [http_poll, web_admin, tls]
+          %%%
+          %%%  - A keyword of ejabberd is a word in lowercase.
+          %%%    Strings are enclosed in "" and can contain spaces, dots, ...
+          %%%      {language, "en"}.
+          %%%      {ldap_rootdn, "dc=example,dc=com"}.
+          %%%
+          %%%  - This term includes a tuple, a keyword, a list, and two strings:
+          %%%      {hosts, ["jabber.example.net", "im.example.com"]}.
+          %%%
+
+
+          %%%.   =======================
+          %%%'   OVERRIDE STORED OPTIONS
+
+          %%
+          %% Override the old values stored in the database.
+          %%
+
+          %%
+          %% Override global options (shared by all ejabberd nodes in a cluster).
+          %%
+          %%override_global.
+
+          %%
+          %% Override local options (specific for this particular ejabberd node).
+          %%
+          %%override_local.
+
+          %%
+          %% Remove the Access Control Lists before new ones are added.
+          %%
+          %%override_acls.
+
+
+          %%%.   =========
+          %%%'   DEBUGGING
+
+          %%
+          %% loglevel: Verbosity of log files generated by ejabberd.
+          %% 0: No ejabberd log at all (not recommended)
+          %% 1: Critical
+          %% 2: Error
+          %% 3: Warning
+          %% 4: Info
+          %% 5: Debug
+          %%
+          {loglevel, 3}.
+
+          %%
+          %% watchdog_admins: Only useful for developers: if an ejabberd process
+          %% consumes a lot of memory, send live notifications to these XMPP
+          %% accounts.
+          %%
+          %%{watchdog_admins, ["bob@example.com"]}.
+
+
+          %%%.   ================
+          %%%'   SERVED HOSTNAMES
+
+          %%
+          %% hosts: Domains served by ejabberd.
+          %% You can define one or several, for example:
+          %% {hosts, ["example.net", "example.com", "example.org"]}.
+          %%
+          {hosts, ["jabber.viljetic.de"]}.
+
+          %%
+          %% route_subdomains: Delegate subdomains to other XMPP servers.
+          %% For example, if this ejabberd serves example.org and you want
+          %% to allow communication with an XMPP server called im.example.org.
+          %%
+          %%{route_subdomains, s2s}.
+
+
+          %%%.   ===============
+          %%%'   LISTENING PORTS
+
+          %%
+          %% listen: The ports ejabberd will listen on, which service each is handled
+          %% by and what options to start it with.
+          %%
+          {listen,
+           [
+
+            {5222, ejabberd_c2s, [
+
+                %%
+                %% If TLS is compiled in and you installed a SSL
+                %% certificate, specify the full path to the
+                %% file and uncomment this line:
+                %%
+                starttls,
+                {certfile, "/etc/nixos/secrets/ejabberd.cd.retiolum.pem"},
+
+                {access, c2s},
+                {shaper, c2s_shaper},
+                {max_stanza_size, 65536}
+                     ]},
+
+            {5269, ejabberd_s2s_in, [
+                   {shaper, s2s_shaper},
+                   {max_stanza_size, 131072}
+                  ]},
+
+            %%
+            %% ejabberd_service: Interact with external components (transports, ...)
+            %%
+            %%{8888, ejabberd_service, [
+            %%			    {access, all},
+            %%			    {shaper_rule, fast},
+            %%			    {ip, {127, 0, 0, 1}},
+            %%			    {hosts, ["icq.example.org", "sms.example.org"],
+            %%			     [{password, "secret"}]
+            %%			    }
+            %%			   ]},
+
+            %%
+            %% ejabberd_stun: Handles STUN Binding requests
+            %%
+            %%{{3478, udp}, ejabberd_stun, []},
+
+            {5280, ejabberd_http, [
+                 %%{request_handlers,
+                 %% [
+                 %%  {["pub", "archive"], mod_http_fileserver}
+                 %% ]},
+                 captcha,
+                 http_bind,
+                 http_poll,
+                 %%register,
+                 web_admin
+                ]}
+
+           ]}.
+
+          %%
+          %% s2s_use_starttls: Enable STARTTLS + Dialback for S2S connections.
+          %% Allowed values are: false optional required required_trusted
+          %% You must specify a certificate file.
+          %%
+          {s2s_use_starttls, required}.
+
+          %%
+          %% s2s_certfile: Specify a certificate file.
+          %%
+          {s2s_certfile, "/etc/nixos/secrets/ejabberd.cd.retiolum.pem"}.
+
+          %%
+          %% domain_certfile: Specify a different certificate for each served hostname.
+          %%
+          %%{domain_certfile, "example.org", "/path/to/example_org.pem"}.
+          %%{domain_certfile, "example.com", "/path/to/example_com.pem"}.
+
+          %%
+          %% S2S whitelist or blacklist
+          %%
+          %% Default s2s policy for undefined hosts.
+          %%
+          %%{s2s_default_policy, allow}.
+
+          %%
+          %% Allow or deny communication with specific servers.
+          %%
+          %%{{s2s_host, "goodhost.org"}, allow}.
+          %%{{s2s_host, "badhost.org"}, deny}.
+
+          %%
+          %% Outgoing S2S options
+          %%
+          %% Preferred address families (which to try first) and connect timeout
+          %% in milliseconds.
+          %%
+          %%{outgoing_s2s_options, [ipv4, ipv6], 10000}.
+
+
+          %%%.   ==============
+          %%%'   AUTHENTICATION
+
+          %%
+          %% auth_method: Method used to authenticate the users.
+          %% The default method is the internal.
+          %% If you want to use a different method,
+          %% comment this line and enable the correct ones.
+          %%
+          {auth_method, internal}.
+          %%
+          %% Store the plain passwords or hashed for SCRAM:
+          %%{auth_password_format, plain}.
+          %%{auth_password_format, scram}.
+          %%
+          %% Define the FQDN if ejabberd doesn't detect it:
+          %%{fqdn, "server3.example.com"}.
+
+          %%
+          %% Authentication using external script
+          %% Make sure the script is executable by ejabberd.
+          %%
+          %%{auth_method, external}.
+          %{extauth_program, "$ {ejabberd-auth}"}.
+
+          %%
+          %% Authentication using ODBC
+          %% Remember to setup a database in the next section.
+          %%
+          %%{auth_method, odbc}.
+
+          %%
+          %% Authentication using PAM
+          %%
+          %%{auth_method, pam}.
+          %%{pam_service, "pamservicename"}.
+
+          %%
+          %% Authentication using LDAP
+          %%
+          %%{auth_method, ldap}.
+          %%
+          %% List of LDAP servers:
+          %%{ldap_servers, ["localhost"]}.
+          %%
+          %% Encryption of connection to LDAP servers:
+          %%{ldap_encrypt, none}.
+          %%{ldap_encrypt, tls}.
+          %%
+          %% Port to connect to on LDAP servers:
+          %%{ldap_port, 389}.
+          %%{ldap_port, 636}.
+          %%
+          %% LDAP manager:
+          %%{ldap_rootdn, "dc=example,dc=com"}.
+          %%
+          %% Password of LDAP manager:
+          %%{ldap_password, "******"}.
+          %%
+          %% Search base of LDAP directory:
+          %%{ldap_base, "dc=example,dc=com"}.
+          %%
+          %% LDAP attribute that holds user ID:
+          %%{ldap_uids, [{"mail", "%u@mail.example.org"}]}.
+          %%
+          %% LDAP filter:
+          %%{ldap_filter, "(objectClass=shadowAccount)"}.
+
+          %%
+          %% Anonymous login support:
+          %%   auth_method: anonymous
+          %%   anonymous_protocol: sasl_anon | login_anon | both
+          %%   allow_multiple_connections: true | false
+          %%
+          %%{host_config, "public.example.org", [{auth_method, anonymous},
+          %%                                     {allow_multiple_connections, false},
+          %%                                     {anonymous_protocol, sasl_anon}]}.
+          %%
+          %% To use both anonymous and internal authentication:
+          %%
+          %%{host_config, "public.example.org", [{auth_method, [internal, anonymous]}]}.
+
+
+          %%%.   ==============
+          %%%'   DATABASE SETUP
+
+          %% ejabberd by default uses the internal Mnesia database,
+          %% so you do not necessarily need this section.
+          %% This section provides configuration examples in case
+          %% you want to use other database backends.
+          %% Please consult the ejabberd Guide for details on database creation.
+
+          %%
+          %% MySQL server:
+          %%
+          %%{odbc_server, {mysql, "server", "database", "username", "password"}}.
+          %%
+          %% If you want to specify the port:
+          %%{odbc_server, {mysql, "server", 1234, "database", "username", "password"}}.
+
+          %%
+          %% PostgreSQL server:
+          %%
+          %%{odbc_server, {pgsql, "server", "database", "username", "password"}}.
+          %%
+          %% If you want to specify the port:
+          %%{odbc_server, {pgsql, "server", 1234, "database", "username", "password"}}.
+          %%
+          %% If you use PostgreSQL, have a large database, and need a
+          %% faster but inexact replacement for "select count(*) from users"
+          %%
+          %%{pgsql_users_number_estimate, true}.
+
+          %%
+          %% ODBC compatible or MSSQL server:
+          %%
+          %%{odbc_server, "DSN=ejabberd;UID=ejabberd;PWD=ejabberd"}.
+
+          %%
+          %% Number of connections to open to the database for each virtual host
+          %%
+          %%{odbc_pool_size, 10}.
+
+          %%
+          %% Interval to make a dummy SQL request to keep the connections to the
+          %% database alive. Specify in seconds: for example 28800 means 8 hours
+          %%
+          %%{odbc_keepalive_interval, undefined}.
+
+
+          %%%.   ===============
+          %%%'   TRAFFIC SHAPERS
+
+          %%
+          %% The "normal" shaper limits traffic speed to 1000 B/s
+          %%
+          {shaper, normal, {maxrate, 1000}}.
+
+          %%
+          %% The "fast" shaper limits traffic speed to 50000 B/s
+          %%
+          {shaper, fast, {maxrate, 50000}}.
+
+          %%
+          %% This option specifies the maximum number of elements in the queue
+          %% of the FSM. Refer to the documentation for details.
+          %%
+          {max_fsm_queue, 1000}.
+
+
+          %%%.   ====================
+          %%%'   ACCESS CONTROL LISTS
+
+          %%
+          %% The 'admin' ACL grants administrative privileges to XMPP accounts.
+          %% You can put here as many accounts as you want.
+          %%
+          %%{acl, admin, {user, "aleksey", "localhost"}}.
+          %%{acl, admin, {user, "ermine", "example.org"}}.
+
+          %%
+          %% Blocked users
+          %%
+          %%{acl, blocked, {user, "baduser", "example.org"}}.
+          %%{acl, blocked, {user, "test"}}.
+
+          %%
+          %% Local users: don't modify this line.
+          %%
+          {acl, local, {user_regexp, ""}}.
+
+          %%
+          %% More examples of ACLs
+          %%
+          %%{acl, jabberorg, {server, "jabber.org"}}.
+          %%{acl, aleksey, {user, "aleksey", "jabber.ru"}}.
+          %%{acl, test, {user_regexp, "^test"}}.
+          %%{acl, test, {user_glob, "test*"}}.
+
+          %%
+          %% Define specific ACLs in a virtual host.
+          %%
+          %%{host_config, "localhost",
+          %% [
+          %%  {acl, admin, {user, "bob-local", "localhost"}}
+          %% ]
+          %%}.
+
+
+          %%%.   ============
+          %%%'   ACCESS RULES
+
+          %% Maximum number of simultaneous sessions allowed for a single user:
+          {access, max_user_sessions, [{10, all}]}.
+
+          %% Maximum number of offline messages that users can have:
+          {access, max_user_offline_messages, [{5000, admin}, {100, all}]}.
+
+          %% This rule allows access only for local users:
+          {access, local, [{allow, local}]}.
+
+          %% Only non-blocked users can use c2s connections:
+          {access, c2s, [{deny, blocked},
+                   {allow, all}]}.
+
+          %% For C2S connections, all users except admins use the "normal" shaper
+          {access, c2s_shaper, [{none, admin},
+                    {normal, all}]}.
+
+          %% All S2S connections use the "fast" shaper
+          {access, s2s_shaper, [{fast, all}]}.
+
+          %% Only admins can send announcement messages:
+          {access, announce, [{allow, admin}]}.
+
+          %% Only admins can use the configuration interface:
+          {access, configure, [{allow, admin}]}.
+
+          %% Admins of this server are also admins of the MUC service:
+          {access, muc_admin, [{allow, admin}]}.
+
+          %% Only accounts of the local ejabberd server can create rooms:
+          {access, muc_create, [{allow, local}]}.
+
+          %% All users are allowed to use the MUC service:
+          {access, muc, [{allow, all}]}.
+
+          %% Only accounts on the local ejabberd server can create Pubsub nodes:
+          {access, pubsub_createnode, [{allow, local}]}.
+
+          %% In-band registration allows registration of any possible username.
+          %% To disable in-band registration, replace 'allow' with 'deny'.
+          {access, register, [{allow, all}]}.
+
+          %% By default the frequency of account registrations from the same IP
+          %% is limited to 1 account every 10 minutes. To disable, specify: infinity
+          %%{registration_timeout, 600}.
+
+          %%
+          %% Define specific Access Rules in a virtual host.
+          %%
+          %%{host_config, "localhost",
+          %% [
+          %%  {access, c2s, [{allow, admin}, {deny, all}]},
+          %%  {access, register, [{deny, all}]}
+          %% ]
+          %%}.
+
+
+          %%%.   ================
+          %%%'   DEFAULT LANGUAGE
+
+          %%
+          %% language: Default language used for server messages.
+          %%
+          {language, "en"}.
+
+          %%
+          %% Set a different default language in a virtual host.
+          %%
+          %%{host_config, "localhost",
+          %% [{language, "ru"}]
+          %%}.
+
+
+          %%%.   =======
+          %%%'   CAPTCHA
+
+          %%
+          %% Full path to a script that generates the image.
+          %%
+          %%{captcha_cmd, "/lib/ejabberd/priv/bin/captcha.sh"}.
+
+          %%
+          %% Host for the URL and port where ejabberd listens for CAPTCHA requests.
+          %%
+          %%{captcha_host, "example.org:5280"}.
+
+          %%
+          %% Limit CAPTCHA calls per minute for JID/IP to avoid DoS.
+          %%
+          %%{captcha_limit, 5}.
+
+          %%%.   =======
+          %%%'   MODULES
+
+          %%
+          %% Modules enabled in all ejabberd virtual hosts.
+          %%
+          {modules,
+           [
+            {mod_adhoc,    []},
+            {mod_announce, [{access, announce}]}, % recommends mod_adhoc
+            {mod_blocking,[]}, % requires mod_privacy
+            {mod_caps,     []},
+            {mod_configure,[]}, % requires mod_adhoc
+            {mod_disco,    []},
+            %%{mod_echo,   [{host, "echo.localhost"}]},
+            {mod_irc,      []},
+            {mod_http_bind, []},
+            %%{mod_http_fileserver, [
+            %%                       {docroot, "/var/www"},
+            %%                       {accesslog, "/var/log/ejabberd/access.log"}
+            %%                      ]},
+            {mod_last,     []},
+            {mod_muc,      [
+                %%{host, "conference.@HOST@"},
+                {access, muc},
+                {access_create, muc_create},
+                {access_persistent, muc_create},
+                {access_admin, muc_admin}
+               ]},
+            %%{mod_muc_log,[]},
+            {mod_offline,  [{access_max_user_messages, max_user_offline_messages}]},
+            {mod_ping,     []},
+            %%{mod_pres_counter,[{count, 5}, {interval, 60}]},
+            {mod_privacy,  []},
+            {mod_private,  []},
+            %%{mod_proxy65,[]},
+            {mod_pubsub,   [
+                {access_createnode, pubsub_createnode},
+                {ignore_pep_from_offline, true}, % reduces resource comsumption, but XEP incompliant
+                %%{ignore_pep_from_offline, false},  % XEP compliant, but increases resource comsumption
+                {last_item_cache, false},
+                {plugins, ["flat", "hometree", "pep"]}  % pep requires mod_caps
+               ]},
+            {mod_register, [
+                %%
+                %% Protect In-Band account registrations with CAPTCHA.
+                %%
+                %%{captcha_protected, true},
+
+                %%
+                %% Set the minimum informational entropy for passwords.
+                %%
+                %%{password_strength, 32},
+
+                %%
+                %% After successful registration, the user receives
+                %% a message with this subject and body.
+                %%
+                {welcome_message, {"Welcome!",
+                       "Hi.\nWelcome to this XMPP server."}},
+
+                %%
+                %% When a user registers, send a notification to
+                %% these XMPP accounts.
+                %%
+                %%{registration_watchers, ["admin1@example.org"]},
+
+                %%
+                %% Only clients in the server machine can register accounts
+                %%
+                {ip_access, [{allow, "127.0.0.0/8"},
+                       {deny, "0.0.0.0/0"}]},
+
+                %%
+                %% Local c2s or remote s2s users cannot register accounts
+                %%
+                %%{access_from, deny},
+
+                {access, register}
+               ]},
+            %%{mod_register_web, [
+                %%
+                %% When a user registers, send a notification to
+                %% these XMPP accounts.
+                %%
+                %%{registration_watchers, ["admin1@example.org"]}
+            %%		 ]},
+            {mod_roster,   []},
+            %%{mod_service_log,[]},
+            {mod_shared_roster,[]},
+            {mod_stats,    []},
+            {mod_time,     []},
+            {mod_vcard,    []},
+            {mod_version,  []}
+           ]}.
+
+          %%
+          %% Enable modules with custom options in a specific virtual host
+          %%
+          %%{host_config, "localhost",
+          %% [{{add, modules},
+          %%   [
+          %%    {mod_echo, [{host, "mirror.localhost"}]}
+          %%   ]
+          %%  }
+          %% ]}.
+
+
+          %%%.
+          %%%'
+
+          %%% $Id$
+
+          %%% Local Variables:
+          %%% mode: erlang
+          %%% End:
+          %%% vim: set filetype=erlang tabstop=8 foldmarker=%%%',%%%. foldmethod=marker:
+        '';
+        # TODO properly configured wrapper
+        systemPackages = [ my-ejabberdctl ];
+      };
+          #exim_user = ${cfg.user}
+          #exim_group = ${cfg.group}
+          #exim_path = /var/setuid-wrappers/exim
+          #spool_directory = ${cfg.spoolDir}
+          #${cfg.config}
+
+      users.extraUsers = singleton {
+        name = "ejabberd";
+        description = "TODO";
+        uid = 405222;
+        group = "ejabberd";
+        home = "/var/ejabberd";
+        createHome = true;
+      };
+
+      users.extraGroups = singleton {
+        name = "ejabberd";
+        gid = 405222;
+      };
+
+      #security.setuidPrograms = [ "exim" ];
+
+      systemd.services.ejabberd = {
+        description = "ejabberd XMPP Daemon";
+        wantedBy = [ "multi-user.target" ];
+        after = [ "network.target" ];
+        reloadIfChanged = true;
+        serviceConfig = {
+          ExecStart       = "${my-ejabberdctl}/bin/ejabberdctl start";
+          ExecStop        = "${my-ejabberdctl}/bin/ejabberdctl stop";
+          ExecReload      = "${my-ejabberdctl}/bin/ejabberdctl restart";
+          Type            = "oneshot";
+          RemainAfterExit = "yes";
+          RestartSec      = 5;
+          LimitNOFILE     = 16000;
+          User            = "ejabberd";
+          Group           = "ejabberd";
+        };
+      };
+
+      systemd.services.ejabberd-prepare = {
+        description = "ejabberd XMPP Preparetion Service";
+        requiredBy = [ "ejabberd.service" ];
+        serviceConfig = {
+          Type            = "oneshot";
+          RestartSec      = 5;
+          ExecStart       = "${writeScript "ejabberd-prepare"
+              ''
+                #! /bin/sh
+                set -euf
+                chown ejabberd: /etc/nixos/secrets/ejabberd.cd.retiolum.pem
+              ''
+            }";
+        };
+      };
+
+
+
+    };
+
+  #config = mkIf cfg.enable {
+  #  environment.systemPackages = [ pkgs.ejabberd ];
+
+  #  jobs.ejabberd =
+  #    { description = "EJabberd server";
+
+  #      startOn = "started network-interfaces";
+  #      stopOn = "stopping network-interfaces";
+
+  #      environment = {
+  #        PATH = "$PATH:${pkgs.ejabberd}/sbin:${pkgs.ejabberd}/bin:${pkgs.coreutils}/bin:${pkgs.bash}/bin:${pkgs.gnused}/bin";
+  #      };
+
+  #      preStart =
+  #        ''
+  #          PATH="$PATH:${pkgs.ejabberd}/sbin:${pkgs.ejabberd}/bin:${pkgs.coreutils}/bin:${pkgs.bash}/bin:${pkgs.gnused}/bin";
+	#    
+  #          # Initialise state data
+  #          mkdir -p ${cfg.logsDir}
+
+  #          if ! test -d ${cfg.spoolDir}
+  #          then
+  #              initialize=1
+  #              cp -av ${pkgs.ejabberd}/var/lib/ejabberd /var/lib
+  #          fi
+
+  #          #if ! test -d ${cfg.confDir}
+  #          #then
+  #          #    mkdir -p ${cfg.confDir}
+  #          #    cp ${pkgs.ejabberd}/etc/ejabberd/* ${cfg.confDir}
+  #          #    sed -e 's|{hosts, \["localhost"\]}.|{hosts, \[${cfg.virtualHosts}\]}.|' ${pkgs.ejabberd}/etc/ejabberd/ejabberd.cfg > ${cfg.confDir}/ejabberd.cfg
+  #          #fi
+  #          mkdir -p ${cfg.confDir}
+
+
+  #          ejabberdctl --config-dir ${cfg.confDir} --logs ${cfg.logsDir} --spool ${cfg.spoolDir} start
+
+  #          ${if cfg.loadDumps == [] then "" else
+  #            ''
+  #              if [ "$initialize" = "1" ]
+  #              then
+  #                  # Wait until the ejabberd server is available for use
+  #                  count=0
+  #                  while ! ejabberdctl --config-dir ${cfg.confDir} --logs ${cfg.logsDir} --spool ${cfg.spoolDir} status
+  #                  do
+  #                      if [ $count -eq 30 ]
+  #                      then
+  #                          echo "Tried 30 times, giving up..."
+  #                          exit 1
+  #                      fi
+
+  #                      echo "Ejabberd daemon not yet started. Waiting for 1 second..."
+  #                      count=$((count++))
+  #                      sleep 1
+  #                  done
+
+  #                  ${concatMapStrings (dump:
+  #                    ''
+  #                      echo "Importing dump: ${dump}"
+
+  #                      if [ -f ${dump} ]
+  #                      then
+  #                          ejabberdctl --config-dir ${cfg.confDir} --logs ${cfg.logsDir} --spool ${cfg.spoolDir} load ${dump}
+  #                      elif [ -d ${dump} ]
+  #                      then
+  #                          for i in ${dump}/ejabberd-dump/*
+  #                          do
+  #                              ejabberdctl --config-dir ${cfg.confDir} --logs ${cfg.logsDir} --spool ${cfg.spoolDir} load $i
+  #                          done
+  #                      fi
+  #                    '') cfg.loadDumps}
+  #              fi
+  #            ''}
+  #        '';
+
+  #      postStop =
+  #        ''
+  #          ejabberdctl --config-dir ${cfg.confDir} --logs ${cfg.logsDir} --spool ${cfg.spoolDir} stop
+  #        '';
+  #    };
+
+  #  security.pam.services.ejabberd = {};
+
+  #};
+
+}
diff --git a/modules/tv/exim-retiolum.nix b/modules/tv/exim-retiolum.nix
new file mode 100644
index 000000000..e80358fcd
--- /dev/null
+++ b/modules/tv/exim-retiolum.nix
@@ -0,0 +1,126 @@
+{ config, pkgs, ... }:
+
+{
+  services.exim =
+    # This configuration makes only sense for retiolum-enabled hosts.
+    # TODO modular configuration
+    assert config.services.retiolum.enable;
+    let
+      # TODO get the hostname from config.services.retiolum.
+      retiolumHostname = "${config.networking.hostName}.retiolum";
+    in
+      { enable = true;
+        config = ''
+          primary_hostname = ${retiolumHostname}
+          domainlist local_domains    = @ : localhost
+          domainlist relay_to_domains = *.retiolum
+          hostlist   relay_from_hosts = <; 127.0.0.1 ; ::1
+
+          acl_smtp_rcpt = acl_check_rcpt
+          acl_smtp_data = acl_check_data
+
+          host_lookup = *
+          rfc1413_hosts = *
+          rfc1413_query_timeout = 5s
+
+          log_file_path = syslog
+          syslog_timestamp = false
+          syslog_duplication = false
+
+          begin acl
+
+          acl_check_rcpt:
+            accept  hosts = :
+                    control = dkim_disable_verify
+
+            deny    message       = Restricted characters in address
+                    domains       = +local_domains
+                    local_parts   = ^[.] : ^.*[@%!/|]
+
+            deny    message       = Restricted characters in address
+                    domains       = !+local_domains
+                    local_parts   = ^[./|] : ^.*[@%!] : ^.*/\\.\\./
+
+            accept  local_parts   = postmaster
+                    domains       = +local_domains
+
+            #accept
+            #  hosts = *.retiolum
+            #  domains = *.retiolum
+            #  control = dkim_disable_verify
+
+            #require verify        = sender
+
+            accept  hosts         = +relay_from_hosts