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{ config, lib, options, pkgs, ... }:
let
inherit (lib) mkDefault mkEnableOption mkForce mkIf mkMerge mkOption types;
inherit (lib) literalExpression mapAttrs optionalString versionAtLeast;
cfg = config.services.zabbixWeb;
opt = options.services.zabbixWeb;
fpm = config.services.phpfpm.pools.zabbix;
user = "zabbix";
group = "zabbix";
stateDir = "/var/lib/zabbix";
zabbixConfig = pkgs.writeText "zabbix.conf.php" ''
<?php
// Zabbix GUI configuration file.
global $DB;
$DB['TYPE'] = '${ { mysql = "MYSQL"; pgsql = "POSTGRESQL"; oracle = "ORACLE"; }.${cfg.database.type} }';
$DB['SERVER'] = '${cfg.database.host}';
$DB['PORT'] = '${toString cfg.database.port}';
$DB['DATABASE'] = '${cfg.database.name}';
$DB['USER'] = '${cfg.database.user}';
# NOTE: file_get_contents adds newline at the end of returned string
$DB['PASSWORD'] = ${if cfg.database.passwordFile != null then "trim(file_get_contents('${cfg.database.passwordFile}'), \"\\r\\n\")" else "''"};
// Schema name. Used for IBM DB2 and PostgreSQL.
$DB['SCHEMA'] = ''';
$ZBX_SERVER = '${cfg.server.address}';
$ZBX_SERVER_PORT = '${toString cfg.server.port}';
$ZBX_SERVER_NAME = ''';
$IMAGE_FORMAT_DEFAULT = IMAGE_FORMAT_PNG;
${cfg.extraConfig}
'';
in
{
# interface
options.services = {
zabbixWeb = {
enable = mkEnableOption "the Zabbix web interface";
package = mkOption {
type = types.package;
default = pkgs.zabbix.web;
defaultText = literalExpression "zabbix.web";
description = "Which Zabbix package to use.";
};
server = {
port = mkOption {
type = types.int;
description = "The port of the Zabbix server to connect to.";
default = 10051;
};
address = mkOption {
type = types.str;
description = "The IP address or hostname of the Zabbix server to connect to.";
default = "localhost";
};
};
database = {
type = mkOption {
type = types.enum [ "mysql" "pgsql" "oracle" ];
example = "mysql";
default = "pgsql";
description = "Database engine to use.";
};
host = mkOption {
type = types.str;
default = "";
description = "Database host address.";
};
port = mkOption {
type = types.int;
default =
if cfg.database.type == "mysql" then config.services.mysql.port
else if cfg.database.type == "pgsql" then config.services.postgresql.port
else 1521;
defaultText = literalExpression ''
if config.${opt.database.type} == "mysql" then config.${options.services.mysql.port}
else if config.${opt.database.type} == "pgsql" then config.${options.services.postgresql.port}
else 1521
'';
description = "Database host port.";
};
name = mkOption {
type = types.str;
default = "zabbix";
description = "Database name.";
};
user = mkOption {
type = types.str;
default = "zabbix";
description = "Database user.";
};
passwordFile = mkOption {
type = types.nullOr types.path;
default = null;
example = "/run/keys/zabbix-dbpassword";
description = ''
A file containing the password corresponding to
<option>database.user</option>.
'';
};
socket = mkOption {
type = types.nullOr types.path;
default = null;
example = "/run/postgresql";
description = "Path to the unix socket file to use for authentication.";
};
};
virtualHost = mkOption {
type = types.submodule (import ../web-servers/apache-httpd/vhost-options.nix);
example = literalExpression ''
{
hostName = "zabbix.example.org";
adminAddr = "webmaster@example.org";
forceSSL = true;
enableACME = true;
}
'';
description = ''
Apache configuration can be done by adapting <literal>services.httpd.virtualHosts.<name></literal>.
See <xref linkend="opt-services.httpd.virtualHosts"/> for further information.
'';
};
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 = ''
Options for the Zabbix PHP pool. See the documentation on <literal>php-fpm.conf</literal> for details on configuration directives.
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = ''
Additional configuration to be copied verbatim into <filename>zabbix.conf.php</filename>.
'';
};
};
};
# implementation
config = mkIf cfg.enable {
services.zabbixWeb.extraConfig = optionalString ((versionAtLeast config.system.stateVersion "20.09") && (versionAtLeast cfg.package.version "5.0.0")) ''
$DB['DOUBLE_IEEE754'] = 'true';
'';
systemd.tmpfiles.rules = [
"d '${stateDir}' 0750 ${user} ${group} - -"
"d '${stateDir}/session' 0750 ${user} ${config.services.httpd.group} - -"
];
services.phpfpm.pools.zabbix = {
inherit user;
group = config.services.httpd.group;
phpOptions = ''
# https://www.zabbix.com/documentation/current/manual/installation/install
memory_limit = 128M
post_max_size = 16M
upload_max_filesize = 2M
max_execution_time = 300
max_input_time = 300
session.auto_start = 0
mbstring.func_overload = 0
always_populate_raw_post_data = -1
# https://bbs.archlinux.org/viewtopic.php?pid=1745214#p1745214
session.save_path = ${stateDir}/session
'' + optionalString (config.time.timeZone != null) ''
date.timezone = "${config.time.timeZone}"
'' + optionalString (cfg.database.type == "oracle") ''
extension=${pkgs.phpPackages.oci8}/lib/php/extensions/oci8.so
'';
phpEnv.ZABBIX_CONFIG = "${zabbixConfig}";
settings = {
"listen.owner" = config.services.httpd.user;
"listen.group" = config.services.httpd.group;
} // cfg.poolConfig;
};
services.httpd = {
enable = true;
adminAddr = mkDefault cfg.virtualHost.adminAddr;
extraModules = [ "proxy_fcgi" ];
virtualHosts.${cfg.virtualHost.hostName} = mkMerge [ cfg.virtualHost {
documentRoot = mkForce "${cfg.package}/share/zabbix";
extraConfig = ''
<Directory "${cfg.package}/share/zabbix">
<FilesMatch "\.php$">
<If "-f %{REQUEST_FILENAME}">
SetHandler "proxy:unix:${fpm.socket}|fcgi://localhost/"
</If>
</FilesMatch>
AllowOverride all
Options -Indexes
DirectoryIndex index.php
</Directory>
'';
} ];
};
users.users.${user} = mapAttrs (name: mkDefault) {
description = "Zabbix daemon user";
uid = config.ids.uids.zabbix;
inherit group;
};
users.groups.${group} = mapAttrs (name: mkDefault) {
gid = config.ids.gids.zabbix;
};
};
}
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