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nixpkgs/nixos/modules/services/mail/mailman.nix
Benjamin Staffin 3a2790c342 services.mailman: RemainAfterExit so settings take effect properly
Prior to this fix, changes to certain settings would not be applied
automatically and users would have to know to manually restart the
affected service.  A prime example of this is
`services.mailman.hyperkitty.baseUrl`, or various things that affect
`mailman3/settings.py`
2020-03-02 02:25:20 +00:00

395 lines
13 KiB
Nix

{ config, pkgs, lib, ... }: # mailman.nix
with lib;
let
cfg = config.services.mailman;
# This deliberately doesn't use recursiveUpdate so users can
# override the defaults.
settings = {
DEFAULT_FROM_EMAIL = cfg.siteOwner;
SERVER_EMAIL = cfg.siteOwner;
ALLOWED_HOSTS = [ "localhost" "127.0.0.1" ] ++ cfg.webHosts;
COMPRESS_OFFLINE = true;
STATIC_ROOT = "/var/lib/mailman-web/static";
MEDIA_ROOT = "/var/lib/mailman-web/media";
} // cfg.webSettings;
settingsJSON = pkgs.writeText "settings.json" (builtins.toJSON settings);
mailmanCfg = ''
[mailman]
site_owner: ${cfg.siteOwner}
layout: fhs
[paths.fhs]
bin_dir: ${pkgs.python3Packages.mailman}/bin
var_dir: /var/lib/mailman
queue_dir: $var_dir/queue
template_dir: $var_dir/templates
log_dir: $var_dir/log
lock_dir: $var_dir/lock
etc_dir: /etc
ext_dir: $etc_dir/mailman.d
pid_file: /run/mailman/master.pid
'' + optionalString cfg.hyperkitty.enable ''
[archiver.hyperkitty]
class: mailman_hyperkitty.Archiver
enable: yes
configuration: /var/lib/mailman/mailman-hyperkitty.cfg
'';
mailmanHyperkittyCfg = pkgs.writeText "mailman-hyperkitty.cfg" ''
[general]
# This is your HyperKitty installation, preferably on the localhost. This
# address will be used by Mailman to forward incoming emails to HyperKitty
# for archiving. It does not need to be publicly available, in fact it's
# better if it is not.
base_url: ${cfg.hyperkitty.baseUrl}
# Shared API key, must be the identical to the value in HyperKitty's
# settings.
api_key: @API_KEY@
'';
in {
###### interface
imports = [
(mkRenamedOptionModule [ "services" "mailman" "hyperkittyBaseUrl" ]
[ "services" "mailman" "hyperkitty" "baseUrl" ])
(mkRemovedOptionModule [ "services" "mailman" "hyperkittyApiKey" ] ''
The Hyperkitty API key is now generated on first run, and not
stored in the world-readable Nix store. To continue using
Hyperkitty, you must set services.mailman.hyperkitty.enable = true.
'')
];
options = {
services.mailman = {
enable = mkOption {
type = types.bool;
default = false;
description = "Enable Mailman on this host. Requires an active Postfix installation.";
};
package = mkOption {
type = types.package;
default = pkgs.mailman;
defaultText = "pkgs.mailman";
example = "pkgs.mailman.override { archivers = []; }";
description = "Mailman package to use";
};
siteOwner = mkOption {
type = types.str;
example = "postmaster@example.org";
description = ''
Certain messages that must be delivered to a human, but which can't
be delivered to a list owner (e.g. a bounce from a list owner), will
be sent to this address. It should point to a human.
'';
};
webRoot = mkOption {
type = types.path;
default = "${pkgs.mailman-web}/${pkgs.python3.sitePackages}";
defaultText = "\${pkgs.mailman-web}/\${pkgs.python3.sitePackages}";
description = ''
The web root for the Hyperkity + Postorius apps provided by Mailman.
This variable can be set, of course, but it mainly exists so that site
admins can refer to it in their own hand-written web server
configuration files.
'';
};
webHosts = mkOption {
type = types.listOf types.str;
default = [];
description = ''
The list of hostnames and/or IP addresses from which the Mailman Web
UI will accept requests. By default, "localhost" and "127.0.0.1" are
enabled. All additional names under which your web server accepts
requests for the UI must be listed here or incoming requests will be
rejected.
'';
};
webUser = mkOption {
type = types.str;
default = config.services.httpd.user;
description = ''
User to run mailman-web as
'';
};
webSettings = mkOption {
type = types.attrs;
default = {};
description = ''
Overrides for the default mailman-web Django settings.
'';
};
hyperkitty = {
enable = mkEnableOption "the Hyperkitty archiver for Mailman";
baseUrl = mkOption {
type = types.str;
default = "http://localhost/hyperkitty/";
description = ''
Where can Mailman connect to Hyperkitty's internal API, preferably on
localhost?
'';
};
};
};
};
###### implementation
config = mkIf cfg.enable {
assertions = let
inherit (config.services) postfix;
requirePostfixHash = optionPath: dataFile:
with lib;
let
expected = "hash:/var/lib/mailman/data/${dataFile}";
value = attrByPath optionPath [] postfix;
in
{ assertion = postfix.enable -> isList value && elem expected value;
message = ''
services.postfix.${concatStringsSep "." optionPath} must contain
"${expected}".
See <https://mailman.readthedocs.io/en/latest/src/mailman/docs/mta.html>.
'';
};
in [
{ assertion = postfix.enable;
message = "Mailman requires Postfix";
}
(requirePostfixHash [ "relayDomains" ] "postfix_domains")
(requirePostfixHash [ "config" "transport_maps" ] "postfix_lmtp")
(requirePostfixHash [ "config" "local_recipient_maps" ] "postfix_lmtp")
];
users.users.mailman = { description = "GNU Mailman"; isSystemUser = true; };
environment.etc."mailman.cfg".text = mailmanCfg;
environment.etc."mailman3/settings.py".text = ''
import os
# Required by mailman_web.settings, but will be overridden when
# settings_local.json is loaded.
os.environ["SECRET_KEY"] = ""
from mailman_web.settings import *
import json
with open('${settingsJSON}') as f:
globals().update(json.load(f))
with open('/var/lib/mailman-web/settings_local.json') as f:
globals().update(json.load(f))
'';
environment.systemPackages = [ cfg.package ] ++ (with pkgs; [ mailman-web ]);
services.postfix = {
recipientDelimiter = "+"; # bake recipient addresses in mail envelopes via VERP
config = {
owner_request_special = "no"; # Mailman handles -owner addresses on its own
};
};
systemd.services.mailman = {
description = "GNU Mailman Master Process";
after = [ "network.target" ];
restartTriggers = [ config.environment.etc."mailman.cfg".source ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
ExecStart = "${cfg.package}/bin/mailman start";
ExecStop = "${cfg.package}/bin/mailman stop";
User = "mailman";
Type = "forking";
RuntimeDirectory = "mailman";
PIDFile = "/run/mailman/master.pid";
};
};
systemd.services.mailman-settings = {
description = "Generate settings files (including secrets) for Mailman";
before = [ "mailman.service" "mailman-web.service" "hyperkitty.service" "httpd.service" "uwsgi.service" ];
requiredBy = [ "mailman.service" "mailman-web.service" "hyperkitty.service" "httpd.service" "uwsgi.service" ];
path = with pkgs; [ jq ];
script = ''
mailmanDir=/var/lib/mailman
mailmanWebDir=/var/lib/mailman-web
mailmanCfg=$mailmanDir/mailman-hyperkitty.cfg
mailmanWebCfg=$mailmanWebDir/settings_local.json
install -m 0700 -o mailman -g nogroup -d $mailmanDir
install -m 0700 -o ${cfg.webUser} -g nogroup -d $mailmanWebDir
if [ ! -e $mailmanWebCfg ]; then
hyperkittyApiKey=$(tr -dc A-Za-z0-9 < /dev/urandom | head -c 64)
secretKey=$(tr -dc A-Za-z0-9 < /dev/urandom | head -c 64)
mailmanWebCfgTmp=$(mktemp)
jq -n '.MAILMAN_ARCHIVER_KEY=$archiver_key | .SECRET_KEY=$secret_key' \
--arg archiver_key "$hyperkittyApiKey" \
--arg secret_key "$secretKey" \
>"$mailmanWebCfgTmp"
chown ${cfg.webUser} "$mailmanWebCfgTmp"
mv -n "$mailmanWebCfgTmp" $mailmanWebCfg
fi
hyperkittyApiKey="$(jq -r .MAILMAN_ARCHIVER_KEY $mailmanWebCfg)"
mailmanCfgTmp=$(mktemp)
sed "s/@API_KEY@/$hyperkittyApiKey/g" ${mailmanHyperkittyCfg} >"$mailmanCfgTmp"
chown mailman "$mailmanCfgTmp"
mv "$mailmanCfgTmp" $mailmanCfg
'';
serviceConfig = {
Type = "oneshot";
# RemainAfterExit makes restartIfChanged work for this service, so
# downstream services will get updated automatically when things like
# services.mailman.hyperkitty.baseUrl change. Otherwise users have to
# restart things manually, which is confusing.
RemainAfterExit = "yes";
};
};
systemd.services.mailman-web = {
description = "Init Postorius DB";
before = [ "httpd.service" "uwsgi.service" ];
requiredBy = [ "httpd.service" "uwsgi.service" ];
restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
script = ''
${pkgs.mailman-web}/bin/mailman-web migrate
rm -rf static
${pkgs.mailman-web}/bin/mailman-web collectstatic
${pkgs.mailman-web}/bin/mailman-web compress
'';
serviceConfig = {
User = cfg.webUser;
Type = "oneshot";
# Similar to mailman-settings.service, this makes restartTriggers work
# properly for this service.
RemainAfterExit = "yes";
WorkingDirectory = "/var/lib/mailman-web";
};
};
systemd.services.mailman-daily = {
description = "Trigger daily Mailman events";
startAt = "daily";
restartTriggers = [ config.environment.etc."mailman.cfg".source ];
serviceConfig = {
ExecStart = "${cfg.package}/bin/mailman digests --send";
User = "mailman";
};
};
systemd.services.hyperkitty = {
inherit (cfg.hyperkitty) enable;
description = "GNU Hyperkitty QCluster Process";
after = [ "network.target" ];
restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
wantedBy = [ "mailman.service" "multi-user.target" ];
serviceConfig = {
ExecStart = "${pkgs.mailman-web}/bin/mailman-web qcluster";
User = cfg.webUser;
WorkingDirectory = "/var/lib/mailman-web";
};
};
systemd.services.hyperkitty-minutely = {
inherit (cfg.hyperkitty) enable;
description = "Trigger minutely Hyperkitty events";
startAt = "minutely";
restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
serviceConfig = {
ExecStart = "${pkgs.mailman-web}/bin/mailman-web runjobs minutely";
User = cfg.webUser;
WorkingDirectory = "/var/lib/mailman-web";
};
};
systemd.services.hyperkitty-quarter-hourly = {
inherit (cfg.hyperkitty) enable;
description = "Trigger quarter-hourly Hyperkitty events";
startAt = "*:00/15";
restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
serviceConfig = {
ExecStart = "${pkgs.mailman-web}/bin/mailman-web runjobs quarter_hourly";
User = cfg.webUser;
WorkingDirectory = "/var/lib/mailman-web";
};
};
systemd.services.hyperkitty-hourly = {
inherit (cfg.hyperkitty) enable;
description = "Trigger hourly Hyperkitty events";
startAt = "hourly";
restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
serviceConfig = {
ExecStart = "${pkgs.mailman-web}/bin/mailman-web runjobs hourly";
User = cfg.webUser;
WorkingDirectory = "/var/lib/mailman-web";
};
};
systemd.services.hyperkitty-daily = {
inherit (cfg.hyperkitty) enable;
description = "Trigger daily Hyperkitty events";
startAt = "daily";
restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
serviceConfig = {
ExecStart = "${pkgs.mailman-web}/bin/mailman-web runjobs daily";
User = cfg.webUser;
WorkingDirectory = "/var/lib/mailman-web";
};
};
systemd.services.hyperkitty-weekly = {
inherit (cfg.hyperkitty) enable;
description = "Trigger weekly Hyperkitty events";
startAt = "weekly";
restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
serviceConfig = {
ExecStart = "${pkgs.mailman-web}/bin/mailman-web runjobs weekly";
User = cfg.webUser;
WorkingDirectory = "/var/lib/mailman-web";
};
};
systemd.services.hyperkitty-yearly = {
inherit (cfg.hyperkitty) enable;
description = "Trigger yearly Hyperkitty events";
startAt = "yearly";
restartTriggers = [ config.environment.etc."mailman3/settings.py".source ];
serviceConfig = {
ExecStart = "${pkgs.mailman-web}/bin/mailman-web runjobs yearly";
User = cfg.webUser;
WorkingDirectory = "/var/lib/mailman-web";
};
};
};
}