nixpkgs/nixos/modules/services/web-apps/wordpress.nix
2023-07-04 21:20:42 +02:00

574 lines
20 KiB
Nix

{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.wordpress;
eachSite = cfg.sites;
user = "wordpress";
webserver = config.services.${cfg.webserver};
stateDir = hostName: "/var/lib/wordpress/${hostName}";
pkg = hostName: cfg: pkgs.stdenv.mkDerivation rec {
pname = "wordpress-${hostName}";
version = src.version;
src = cfg.package;
installPhase = ''
mkdir -p $out
cp -r * $out/
# symlink the wordpress config
ln -s ${wpConfig hostName cfg} $out/share/wordpress/wp-config.php
# symlink uploads directory
ln -s ${cfg.uploadsDir} $out/share/wordpress/wp-content/uploads
ln -s ${cfg.fontsDir} $out/share/wordpress/wp-content/fonts
# https://github.com/NixOS/nixpkgs/pull/53399
#
# Symlinking works for most plugins and themes, but Avada, for instance, fails to
# understand the symlink, causing its file path stripping to fail. This results in
# requests that look like: https://example.com/wp-content//nix/store/...plugin/path/some-file.js
# Since hard linking directories is not allowed, copying is the next best thing.
# copy additional plugin(s), theme(s) and language(s)
${concatStringsSep "\n" (mapAttrsToList (name: theme: "cp -r ${theme} $out/share/wordpress/wp-content/themes/${name}") cfg.themes)}
${concatStringsSep "\n" (mapAttrsToList (name: plugin: "cp -r ${plugin} $out/share/wordpress/wp-content/plugins/${name}") cfg.plugins)}
${concatMapStringsSep "\n" (language: "cp -r ${language}/* $out/share/wordpress/wp-content/languages/") cfg.languages}
'';
};
mergeConfig = cfg: {
# wordpress is installed onto a read-only file system
DISALLOW_FILE_EDIT = true;
AUTOMATIC_UPDATER_DISABLED = true;
DB_NAME = cfg.database.name;
DB_HOST = "${cfg.database.host}:${if cfg.database.socket != null then cfg.database.socket else toString cfg.database.port}";
DB_USER = cfg.database.user;
DB_CHARSET = "utf8";
# Always set DB_PASSWORD even when passwordFile is not set. This is the
# default Wordpress behaviour.
DB_PASSWORD = if (cfg.database.passwordFile != null) then { _file = cfg.database.passwordFile; } else "";
} // cfg.settings;
wpConfig = hostName: cfg: let
conf_gen = c: mapAttrsToList (k: v: "define('${k}', ${mkPhpValue v});") cfg.mergedConfig;
in pkgs.writeTextFile {
name = "wp-config-${hostName}.php";
text = ''
<?php
$table_prefix = '${cfg.database.tablePrefix}';
require_once('${stateDir hostName}/secret-keys.php');
${cfg.extraConfig}
${concatStringsSep "\n" (conf_gen cfg.mergedConfig)}
if ( !defined('ABSPATH') )
define('ABSPATH', dirname(__FILE__) . '/');
require_once(ABSPATH . 'wp-settings.php');
?>
'';
checkPhase = "${pkgs.php81}/bin/php --syntax-check $target";
};
mkPhpValue = v: let
isHasAttr = s: isAttrs v && hasAttr s v;
in
if isString v then escapeShellArg v
# NOTE: If any value contains a , (comma) this will not get escaped
else if isList v && any lib.strings.isCoercibleToString v then escapeShellArg (concatMapStringsSep "," toString v)
else if isInt v then toString v
else if isBool v then boolToString v
else if isHasAttr "_file" then "trim(file_get_contents(${lib.escapeShellArg v._file}))"
else if isHasAttr "_raw" then v._raw
else abort "The Wordpress config value ${lib.generators.toPretty {} v} can not be encoded."
;
secretsVars = [ "AUTH_KEY" "SECURE_AUTH_KEY" "LOGGED_IN_KEY" "NONCE_KEY" "AUTH_SALT" "SECURE_AUTH_SALT" "LOGGED_IN_SALT" "NONCE_SALT" ];
secretsScript = hostStateDir: ''
# The match in this line is not a typo, see https://github.com/NixOS/nixpkgs/pull/124839
grep -q "LOOGGED_IN_KEY" "${hostStateDir}/secret-keys.php" && rm "${hostStateDir}/secret-keys.php"
if ! test -e "${hostStateDir}/secret-keys.php"; then
umask 0177
echo "<?php" >> "${hostStateDir}/secret-keys.php"
${concatMapStringsSep "\n" (var: ''
echo "define('${var}', '`tr -dc a-zA-Z0-9 </dev/urandom | head -c 64`');" >> "${hostStateDir}/secret-keys.php"
'') secretsVars}
echo "?>" >> "${hostStateDir}/secret-keys.php"
chmod 440 "${hostStateDir}/secret-keys.php"
fi
'';
siteOpts = { lib, name, config, ... }:
{
options = {
package = mkOption {
type = types.package;
default = pkgs.wordpress;
defaultText = literalExpression "pkgs.wordpress";
description = lib.mdDoc "Which WordPress package to use.";
};
uploadsDir = mkOption {
type = types.path;
default = "/var/lib/wordpress/${name}/uploads";
description = lib.mdDoc ''
This directory is used for uploads of pictures. The directory passed here is automatically
created and permissions adjusted as required.
'';
};
fontsDir = mkOption {
type = types.path;
default = "/var/lib/wordpress/${name}/fonts";
description = lib.mdDoc ''
This directory is used to download fonts from a remote location, e.g.
to host google fonts locally.
'';
};
plugins = mkOption {
type = with types; coercedTo
(listOf path)
(l: warn "setting this option with a list is deprecated"
listToAttrs (map (p: nameValuePair (p.name or (throw "${p} does not have a name")) p) l))
(attrsOf path);
default = {};
description = lib.mdDoc ''
Path(s) to respective plugin(s) which are copied from the 'plugins' directory.
::: {.note}
These plugins need to be packaged before use, see example.
:::
'';
example = literalExpression ''
{
inherit (pkgs.wordpressPackages.plugins) embed-pdf-viewer-plugin;
}
'';
};
themes = mkOption {
type = with types; coercedTo
(listOf path)
(l: warn "setting this option with a list is deprecated"
listToAttrs (map (p: nameValuePair (p.name or (throw "${p} does not have a name")) p) l))
(attrsOf path);
default = { inherit (pkgs.wordpressPackages.themes) twentytwentythree; };
defaultText = literalExpression "{ inherit (pkgs.wordpressPackages.themes) twentytwentythree; }";
description = lib.mdDoc ''
Path(s) to respective theme(s) which are copied from the 'theme' directory.
::: {.note}
These themes need to be packaged before use, see example.
:::
'';
example = literalExpression ''
{
inherit (pkgs.wordpressPackages.themes) responsive-theme;
}
'';
};
languages = mkOption {
type = types.listOf types.path;
default = [];
description = lib.mdDoc ''
List of path(s) to respective language(s) which are copied from the 'languages' directory.
'';
example = literalExpression ''
[(
# Let's package the German language.
# For other languages try to replace language and country code in the download URL with your desired one.
# Reference https://translate.wordpress.org for available translations and
# codes.
language-de = pkgs.stdenv.mkDerivation {
name = "language-de";
src = pkgs.fetchurl {
url = "https://de.wordpress.org/wordpress-''${pkgs.wordpress.version}-de_DE.tar.gz";
# Name is required to invalidate the hash when wordpress is updated
name = "wordpress-''${pkgs.wordpress.version}-language-de"
sha256 = "sha256-dlas0rXTSV4JAl8f/UyMbig57yURRYRhTMtJwF9g8h0=";
};
installPhase = "mkdir -p $out; cp -r ./wp-content/languages/* $out/";
};
)];
'';
};
database = {
host = mkOption {
type = types.str;
default = "localhost";
description = lib.mdDoc "Database host address.";
};
port = mkOption {
type = types.port;
default = 3306;
description = lib.mdDoc "Database host port.";
};
name = mkOption {
type = types.str;
default = "wordpress";
description = lib.mdDoc "Database name.";
};
user = mkOption {
type = types.str;
default = "wordpress";
description = lib.mdDoc "Database user.";
};
passwordFile = mkOption {
type = types.nullOr types.path;
default = null;
example = "/run/keys/wordpress-dbpassword";
description = lib.mdDoc ''
A file containing the password corresponding to
{option}`database.user`.
'';
};
tablePrefix = mkOption {
type = types.str;
default = "wp_";
description = lib.mdDoc ''
The $table_prefix is the value placed in the front of your database tables.
Change the value if you want to use something other than wp_ for your database
prefix. Typically this is changed if you are installing multiple WordPress blogs
in the same database.
See <https://codex.wordpress.org/Editing_wp-config.php#table_prefix>.
'';
};
socket = mkOption {
type = types.nullOr types.path;
default = null;
defaultText = literalExpression "/run/mysqld/mysqld.sock";
description = lib.mdDoc "Path to the unix socket file to use for authentication.";
};
createLocally = mkOption {
type = types.bool;
default = true;
description = lib.mdDoc "Create the database and database user locally.";
};
};
virtualHost = mkOption {
type = types.submodule (import ../web-servers/apache-httpd/vhost-options.nix);
example = literalExpression ''
{
adminAddr = "webmaster@example.org";
forceSSL = true;
enableACME = true;
}
'';
description = lib.mdDoc ''
Apache configuration can be done by adapting {option}`services.httpd.virtualHosts`.
'';
};
poolConfig = mkOption {
type = with types; attrsOf (oneOf [ str int bool ]);
default = {
"pm" = "dynamic";
"pm.max_children" = 32;
"pm.start_servers" = 2;
"pm.min_spare_servers" = 2;
"pm.max_spare_servers" = 4;
"pm.max_requests" = 500;
};
description = lib.mdDoc ''
Options for the WordPress PHP pool. See the documentation on `php-fpm.conf`
for details on configuration directives.
'';
};
settings = mkOption {
type = types.attrsOf types.anything;
default = {};
description = lib.mdDoc ''
Structural Wordpress configuration.
Refer to <https://developer.wordpress.org/apis/wp-config-php>
for details and supported values.
'';
example = literalExpression ''
{
WP_DEFAULT_THEME = "twentytwentytwo";
WP_SITEURL = "https://example.org";
WP_HOME = "https://example.org";
WP_DEBUG = true;
WP_DEBUG_DISPLAY = true;
WPLANG = "de_DE";
FORCE_SSL_ADMIN = true;
AUTOMATIC_UPDATER_DISABLED = true;
}
'';
};
mergedConfig = mkOption {
readOnly = true;
default = mergeConfig config;
defaultText = literalExpression ''
{
DISALLOW_FILE_EDIT = true;
AUTOMATIC_UPDATER_DISABLED = true;
}
'';
description = lib.mdDoc ''
Read only representation of the final configuration.
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = lib.mdDoc ''
Any additional text to be appended to the wp-config.php
configuration file. This is a PHP script. For configuration
settings, see <https://codex.wordpress.org/Editing_wp-config.php>.
**Note**: Please pass structured settings via
`services.wordpress.sites.${name}.settings` instead.
'';
example = ''
@ini_set( 'log_errors', 'Off' );
@ini_set( 'display_errors', 'On' );
'';
};
};
config.virtualHost.hostName = mkDefault name;
};
in
{
# interface
options = {
services.wordpress = {
sites = mkOption {
type = types.attrsOf (types.submodule siteOpts);
default = {};
description = lib.mdDoc "Specification of one or more WordPress sites to serve";
};
webserver = mkOption {
type = types.enum [ "httpd" "nginx" "caddy" ];
default = "httpd";
description = lib.mdDoc ''
Whether to use apache2 or nginx for virtual host management.
Further nginx configuration can be done by adapting `services.nginx.virtualHosts.<name>`.
See [](#opt-services.nginx.virtualHosts) for further information.
Further apache2 configuration can be done by adapting `services.httpd.virtualHosts.<name>`.
See [](#opt-services.httpd.virtualHosts) for further information.
'';
};
};
};
# implementation
config = mkIf (eachSite != {}) (mkMerge [{
assertions =
(mapAttrsToList (hostName: cfg:
{ assertion = cfg.database.createLocally -> cfg.database.user == user;
message = ''services.wordpress.sites."${hostName}".database.user must be ${user} if the database is to be automatically provisioned'';
}) eachSite) ++
(mapAttrsToList (hostName: cfg:
{ assertion = cfg.database.createLocally -> cfg.database.passwordFile == null;
message = ''services.wordpress.sites."${hostName}".database.passwordFile cannot be specified if services.wordpress.sites."${hostName}".database.createLocally is set to true.'';
}) eachSite);
services.mysql = mkIf (any (v: v.database.createLocally) (attrValues eachSite)) {
enable = true;
package = mkDefault pkgs.mariadb;
ensureDatabases = mapAttrsToList (hostName: cfg: cfg.database.name) eachSite;
ensureUsers = mapAttrsToList (hostName: cfg:
{ name = cfg.database.user;
ensurePermissions = { "${cfg.database.name}.*" = "ALL PRIVILEGES"; };
}
) eachSite;
};
services.phpfpm.pools = mapAttrs' (hostName: cfg: (
nameValuePair "wordpress-${hostName}" {
inherit user;
group = webserver.group;
settings = {
"listen.owner" = webserver.user;
"listen.group" = webserver.group;
} // cfg.poolConfig;
}
)) eachSite;
}
(mkIf (cfg.webserver == "httpd") {
services.httpd = {
enable = true;
extraModules = [ "proxy_fcgi" ];
virtualHosts = mapAttrs (hostName: cfg: mkMerge [ cfg.virtualHost {
documentRoot = mkForce "${pkg hostName cfg}/share/wordpress";
extraConfig = ''
<Directory "${pkg hostName cfg}/share/wordpress">
<FilesMatch "\.php$">
<If "-f %{REQUEST_FILENAME}">
SetHandler "proxy:unix:${config.services.phpfpm.pools."wordpress-${hostName}".socket}|fcgi://localhost/"
</If>
</FilesMatch>
# standard wordpress .htaccess contents
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
DirectoryIndex index.php
Require all granted
Options +FollowSymLinks -Indexes
</Directory>
# https://wordpress.org/support/article/hardening-wordpress/#securing-wp-config-php
<Files wp-config.php>
Require all denied
</Files>
'';
} ]) eachSite;
};
})
{
systemd.tmpfiles.rules = flatten (mapAttrsToList (hostName: cfg: [
"d '${stateDir hostName}' 0750 ${user} ${webserver.group} - -"
"d '${cfg.uploadsDir}' 0750 ${user} ${webserver.group} - -"
"Z '${cfg.uploadsDir}' 0750 ${user} ${webserver.group} - -"
"d '${cfg.fontsDir}' 0750 ${user} ${webserver.group} - -"
"Z '${cfg.fontsDir}' 0750 ${user} ${webserver.group} - -"
]) eachSite);
systemd.services = mkMerge [
(mapAttrs' (hostName: cfg: (
nameValuePair "wordpress-init-${hostName}" {
wantedBy = [ "multi-user.target" ];
before = [ "phpfpm-wordpress-${hostName}.service" ];
after = optional cfg.database.createLocally "mysql.service";
script = secretsScript (stateDir hostName);
serviceConfig = {
Type = "oneshot";
User = user;
Group = webserver.group;
};
})) eachSite)
(optionalAttrs (any (v: v.database.createLocally) (attrValues eachSite)) {
httpd.after = [ "mysql.service" ];
})
];
users.users.${user} = {
group = webserver.group;
isSystemUser = true;
};
}
(mkIf (cfg.webserver == "nginx") {
services.nginx = {
enable = true;
virtualHosts = mapAttrs (hostName: cfg: {
serverName = mkDefault hostName;
root = "${pkg hostName cfg}/share/wordpress";
extraConfig = ''
index index.php;
'';
locations = {
"/" = {
priority = 200;
extraConfig = ''
try_files $uri $uri/ /index.php$is_args$args;
'';
};
"~ \\.php$" = {
priority = 500;
extraConfig = ''
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:${config.services.phpfpm.pools."wordpress-${hostName}".socket};
fastcgi_index index.php;
include "${config.services.nginx.package}/conf/fastcgi.conf";
fastcgi_param PATH_INFO $fastcgi_path_info;
fastcgi_param PATH_TRANSLATED $document_root$fastcgi_path_info;
# Mitigate https://httpoxy.org/ vulnerabilities
fastcgi_param HTTP_PROXY "";
fastcgi_intercept_errors off;
fastcgi_buffer_size 16k;
fastcgi_buffers 4 16k;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
'';
};
"~ /\\." = {
priority = 800;
extraConfig = "deny all;";
};
"~* /(?:uploads|files)/.*\\.php$" = {
priority = 900;
extraConfig = "deny all;";
};
"~* \\.(js|css|png|jpg|jpeg|gif|ico)$" = {
priority = 1000;
extraConfig = ''
expires max;
log_not_found off;
'';
};
};
}) eachSite;
};
})
(mkIf (cfg.webserver == "caddy") {
services.caddy = {
enable = true;
virtualHosts = mapAttrs' (hostName: cfg: (
nameValuePair "http://${hostName}" {
extraConfig = ''
root * /${pkg hostName cfg}/share/wordpress
file_server
php_fastcgi unix/${config.services.phpfpm.pools."wordpress-${hostName}".socket}
@uploads {
path_regexp path /uploads\/(.*)\.php
}
rewrite @uploads /
@wp-admin {
path not ^\/wp-admin/*
}
rewrite @wp-admin {path}/index.php?{query}
'';
}
)) eachSite;
};
})
]);
}