617 lines
17 KiB
Nix
617 lines
17 KiB
Nix
{ config, pkgs, ... }:
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with pkgs.lib;
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let
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mainCfg = config.services.httpd;
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httpd = pkgs.apacheHttpd;
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getPort = cfg: if cfg.port != 0 then cfg.port else if cfg.enableSSL then 443 else 80;
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extraModules = attrByPath ["extraModules"] [] mainCfg;
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extraForeignModules = filter builtins.isAttrs extraModules;
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extraApacheModules = filter (x: !(builtins.isAttrs x)) extraModules; # I'd prefer using builtins.isString here, but doesn't exist yet
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makeServerInfo = cfg: {
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# Canonical name must not include a trailing slash.
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canonicalName =
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(if cfg.enableSSL then "https" else "http") + "://" +
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cfg.hostName +
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(if getPort cfg != (if cfg.enableSSL then 443 else 80) then ":${toString (getPort cfg)}" else "");
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# Admin address: inherit from the main server if not specified for
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# a virtual host.
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adminAddr = if cfg.adminAddr != "" then cfg.adminAddr else mainCfg.adminAddr;
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vhostConfig = cfg;
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serverConfig = mainCfg;
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fullConfig = config; # machine config
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};
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vhostOptions = import ./per-server-options.nix {
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inherit mkOption;
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forMainServer = false;
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};
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vhosts = let
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makeVirtualHost = cfgIn:
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let
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# Fill in defaults for missing options.
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cfg = addDefaultOptionValues vhostOptions cfgIn;
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in cfg;
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in map makeVirtualHost mainCfg.virtualHosts;
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allHosts = [mainCfg] ++ vhosts;
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callSubservices = serverInfo: defs:
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let f = svc:
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let
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svcFunction =
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if svc ? function then svc.function
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else import "${./.}/${if svc ? serviceType then svc.serviceType else svc.serviceName}.nix";
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config = addDefaultOptionValues res.options
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(if svc ? config then svc.config else svc);
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defaults = {
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extraConfig = "";
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extraModules = [];
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extraModulesPre = [];
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extraPath = [];
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extraServerPath = [];
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globalEnvVars = [];
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robotsEntries = "";
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startupScript = "";
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enablePHP = false;
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phpOptions = "";
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options = {};
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};
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res = defaults // svcFunction { inherit config pkgs serverInfo; };
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in res;
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in map f defs;
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# !!! callSubservices is expensive
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subservicesFor = cfg: callSubservices (makeServerInfo cfg) cfg.extraSubservices;
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mainSubservices = subservicesFor mainCfg;
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allSubservices = mainSubservices ++ concatMap subservicesFor vhosts;
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# !!! should be in lib
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writeTextInDir = name: text:
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pkgs.runCommand name {inherit text;} "ensureDir $out; echo -n \"$text\" > $out/$name";
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enableSSL = any (vhost: vhost.enableSSL) allHosts;
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# Names of modules from ${httpd}/modules that we want to load.
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apacheModules =
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[ # HTTP authentication mechanisms: basic and digest.
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"auth_basic" "auth_digest"
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# Authentication: is the user who he claims to be?
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"authn_file" "authn_dbm" "authn_anon" "authn_alias"
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# Authorization: is the user allowed access?
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"authz_user" "authz_groupfile" "authz_host"
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# Other modules.
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"ext_filter" "include" "log_config" "env" "mime_magic"
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"cern_meta" "expires" "headers" "usertrack" /* "unique_id" */ "setenvif"
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"mime" "dav" "status" "autoindex" "asis" "info" "cgi" "dav_fs"
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"vhost_alias" "negotiation" "dir" "imagemap" "actions" "speling"
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"userdir" "alias" "rewrite" "proxy" "proxy_http"
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]
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++ optional enableSSL "ssl"
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++ extraApacheModules;
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loggingConf = ''
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ErrorLog ${mainCfg.logDir}/error_log
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LogLevel notice
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LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
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LogFormat "%h %l %u %t \"%r\" %>s %b" common
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LogFormat "%{Referer}i -> %U" referer
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LogFormat "%{User-agent}i" agent
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CustomLog ${mainCfg.logDir}/access_log ${mainCfg.logFormat}
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'';
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browserHacks = ''
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BrowserMatch "Mozilla/2" nokeepalive
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BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0 force-response-1.0
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BrowserMatch "RealPlayer 4\.0" force-response-1.0
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BrowserMatch "Java/1\.0" force-response-1.0
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BrowserMatch "JDK/1\.0" force-response-1.0
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BrowserMatch "Microsoft Data Access Internet Publishing Provider" redirect-carefully
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BrowserMatch "^WebDrive" redirect-carefully
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BrowserMatch "^WebDAVFS/1.[012]" redirect-carefully
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BrowserMatch "^gnome-vfs" redirect-carefully
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'';
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sslConf = ''
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SSLSessionCache shm:${mainCfg.stateDir}/ssl_scache(512000)
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SSLMutex posixsem
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SSLRandomSeed startup builtin
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SSLRandomSeed connect builtin
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'';
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mimeConf = ''
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TypesConfig ${httpd}/conf/mime.types
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AddType application/x-x509-ca-cert .crt
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AddType application/x-pkcs7-crl .crl
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AddType application/x-httpd-php .php .phtml
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<IfModule mod_mime_magic.c>
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MIMEMagicFile ${httpd}/conf/magic
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</IfModule>
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AddEncoding x-compress Z
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AddEncoding x-gzip gz tgz
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'';
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perServerConf = isMainServer: cfg: let
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serverInfo = makeServerInfo cfg;
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subservices = callSubservices serverInfo cfg.extraSubservices;
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documentRoot = if cfg.documentRoot != null then cfg.documentRoot else
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pkgs.runCommand "empty" {} "ensureDir $out";
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documentRootConf = ''
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DocumentRoot "${documentRoot}"
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<Directory "${documentRoot}">
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Options Indexes FollowSymLinks
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AllowOverride None
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Order allow,deny
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Allow from all
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</Directory>
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'';
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robotsTxt = pkgs.writeText "robots.txt" ''
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${# If this is a vhost, the include the entries for the main server as well.
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if isMainServer then ""
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else concatMapStrings (svc: svc.robotsEntries) mainSubservices}
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${concatMapStrings (svc: svc.robotsEntries) subservices}
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'';
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robotsConf = ''
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Alias /robots.txt ${robotsTxt}
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'';
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in ''
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ServerName ${serverInfo.canonicalName}
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${concatMapStrings (alias: "ServerAlias ${alias}\n") cfg.serverAliases}
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${if cfg.sslServerCert != "" then ''
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SSLCertificateFile ${cfg.sslServerCert}
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SSLCertificateKeyFile ${cfg.sslServerKey}
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'' else ""}
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${if cfg.enableSSL then ''
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SSLEngine on
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'' else if enableSSL then /* i.e., SSL is enabled for some host, but not this one */
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''
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SSLEngine off
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'' else ""}
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${if isMainServer || cfg.adminAddr != "" then ''
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ServerAdmin ${cfg.adminAddr}
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'' else ""}
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${if !isMainServer && mainCfg.logPerVirtualHost then ''
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ErrorLog ${mainCfg.logDir}/error_log-${cfg.hostName}
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CustomLog ${mainCfg.logDir}/access_log-${cfg.hostName} ${mainCfg.logFormat}
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'' else ""}
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${robotsConf}
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${if isMainServer || cfg.documentRoot != null then documentRootConf else ""}
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${if cfg.enableUserDir then ''
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UserDir public_html
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UserDir disabled root
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<Directory "/home/*/public_html">
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AllowOverride FileInfo AuthConfig Limit Indexes
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Options MultiViews Indexes SymLinksIfOwnerMatch IncludesNoExec
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<Limit GET POST OPTIONS>
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Order allow,deny
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Allow from all
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</Limit>
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<LimitExcept GET POST OPTIONS>
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Order deny,allow
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Deny from all
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</LimitExcept>
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</Directory>
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'' else ""}
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${if cfg.globalRedirect != "" then ''
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RedirectPermanent / ${cfg.globalRedirect}
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'' else ""}
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${
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let makeFileConf = elem: ''
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Alias ${elem.urlPath} ${elem.file}
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'';
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in concatMapStrings makeFileConf cfg.servedFiles
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}
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${
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let makeDirConf = elem: ''
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Alias ${elem.urlPath} ${elem.dir}/
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<Directory ${elem.dir}>
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Options +Indexes
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Order allow,deny
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Allow from all
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AllowOverride All
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</Directory>
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'';
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in concatMapStrings makeDirConf cfg.servedDirs
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}
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${concatMapStrings (svc: svc.extraConfig) subservices}
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${cfg.extraConfig}
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'';
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httpdConf = pkgs.writeText "httpd.conf" ''
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ServerRoot ${httpd}
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PidFile ${mainCfg.stateDir}/httpd.pid
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<IfModule prefork.c>
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MaxClients ${toString mainCfg.maxClients}
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MaxRequestsPerChild ${toString mainCfg.maxRequestsPerChild}
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</IfModule>
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${let
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ports = map getPort allHosts;
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uniquePorts = uniqList {inputList = ports;};
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in concatMapStrings (port: "Listen ${toString port}\n") uniquePorts
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}
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User ${mainCfg.user}
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Group ${mainCfg.group}
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${let
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load = {name, path}: "LoadModule ${name}_module ${path}\n";
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allModules =
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concatMap (svc: svc.extraModulesPre) allSubservices
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++ map (name: {inherit name; path = "${httpd}/modules/mod_${name}.so";}) apacheModules
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++ optional enablePHP { name = "php5"; path = "${pkgs.php}/modules/libphp5.so"; }
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++ concatMap (svc: svc.extraModules) allSubservices
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++ extraForeignModules;
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in concatMapStrings load allModules
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}
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AddHandler type-map var
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<Files ~ "^\.ht">
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Order allow,deny
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Deny from all
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</Files>
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${mimeConf}
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${loggingConf}
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${browserHacks}
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Include ${httpd}/conf/extra/httpd-default.conf
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Include ${httpd}/conf/extra/httpd-autoindex.conf
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Include ${httpd}/conf/extra/httpd-multilang-errordoc.conf
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Include ${httpd}/conf/extra/httpd-languages.conf
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${if enableSSL then sslConf else ""}
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# Fascist default - deny access to everything.
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<Directory />
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Options FollowSymLinks
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AllowOverride None
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Order deny,allow
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Deny from all
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</Directory>
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# But do allow access to files in the store so that we don't have
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# to generate <Directory> clauses for every generated file that we
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# want to serve.
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<Directory /nix/store>
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Order allow,deny
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Allow from all
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</Directory>
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# Generate directives for the main server.
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${perServerConf true mainCfg}
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# Always enable virtual hosts; it doesn't seem to hurt.
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${let
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ports = map getPort allHosts;
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uniquePorts = uniqList {inputList = ports;};
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in concatMapStrings (port: "NameVirtualHost *:${toString port}\n") uniquePorts
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}
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${let
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makeVirtualHost = vhost: ''
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<VirtualHost *:${toString (getPort vhost)}>
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${perServerConf false vhost}
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</VirtualHost>
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'';
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in concatMapStrings makeVirtualHost vhosts
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}
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'';
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enablePHP = any (svc: svc.enablePHP) allSubservices;
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# Generate the PHP configuration file. Should probably be factored
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# out into a separate module.
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phpIni = pkgs.runCommand "php.ini"
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{ options = concatStringsSep "\n"
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([ mainCfg.phpOptions ] ++ (map (svc: svc.phpOptions) allSubservices));
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}
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''
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cat ${pkgs.php}/etc/php-recommended.ini > $out
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echo "$options" >> $out
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'';
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in
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{
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###### interface
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options = {
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services.httpd = {
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enable = mkOption {
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default = false;
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description = "
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Whether to enable the Apache httpd server.
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";
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};
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extraConfig = mkOption {
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default = "";
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description = "
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These configuration lines will be passed verbatim to the apache config
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";
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};
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extraModules = mkOption {
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default = [];
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example = [ "proxy_connect" { name = "php5"; path = "${pkgs.php}/modules/libphp5.so"; } ];
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description = ''
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Specifies additional Apache modules. These can be specified
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as a string in the case of modules distributed with Apache,
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or as an attribute set specifying the
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<varname>name</varname> and <varname>path</varname> of the
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module.
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'';
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};
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logPerVirtualHost = mkOption {
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default = false;
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description = "
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If enabled, each virtual host gets its own
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<filename>access_log</filename> and
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<filename>error_log</filename>, namely suffixed by the
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<option>hostName</option> of the virtual host.
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";
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};
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user = mkOption {
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default = "wwwrun";
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description = "
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User account under which httpd runs. The account is created
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automatically if it doesn't exist.
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";
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};
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group = mkOption {
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default = "wwwrun";
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description = "
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Group under which httpd runs. The account is created
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automatically if it doesn't exist.
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";
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};
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logDir = mkOption {
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default = "/var/log/httpd";
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description = "
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Directory for Apache's log files. It is created automatically.
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";
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};
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logFormat = mkOption {
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default = "common";
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example = "combined";
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description = "
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Log format for Apache's log files. Possible values are: combined, common, referer, agent.
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";
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};
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stateDir = mkOption {
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default = "/var/run/httpd";
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description = "
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Directory for Apache's transient runtime state (such as PID
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files). It is created automatically. Note that the default,
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<filename>/var/run/httpd</filename>, is deleted at boot time.
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";
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};
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virtualHosts = mkOption {
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default = [];
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example = [
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{ hostName = "foo";
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documentRoot = "/data/webroot-foo";
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}
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{ hostName = "bar";
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documentRoot = "/data/webroot-bar";
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}
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];
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description = ''
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Specification of the virtual hosts served by Apache. Each
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element should be an attribute set specifying the
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configuration of the virtual host. The available options
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are the non-global options permissible for the main host.
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'';
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};
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phpOptions = mkOption {
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default = "";
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example =
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''
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date.timezone = "CET"
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'';
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description =
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"Options appended to the PHP configuration file <filename>php.ini</filename>.";
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};
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maxClients = mkOption {
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default = 150;
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example = 8;
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description = "Maximum number of httpd processes (prefork)";
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};
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maxRequestsPerChild = mkOption {
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default = 0;
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example = 500;
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description =
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"Maximum number of httpd requests answered per httpd child (prefork), 0 means unlimited";
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};
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}
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# Include the options shared between the main server and virtual hosts.
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// (import ./per-server-options.nix {
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inherit mkOption;
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forMainServer = true;
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});
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};
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###### implementation
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config = mkIf config.services.httpd.enable {
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users.extraUsers = singleton
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{ name = mainCfg.user;
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description = "Apache httpd user";
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};
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users.extraGroups = singleton
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{ name = mainCfg.group;
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};
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environment.systemPackages = [httpd] ++ concatMap (svc: svc.extraPath) allSubservices;
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services.httpd.phpOptions =
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''
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; Needed for PHP's mail() function.
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sendmail_path = sendmail -t -i
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; Apparently PHP doesn't use $TZ.
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date.timezone = "${config.time.timeZone}"
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'';
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jobs.httpd =
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{ # Statically verify the syntactic correctness of the generated
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# httpd.conf. !!! this is impure! It doesn't just check for
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# syntax, but also whether the Apache user/group exist,
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# whether SSL keys exist, etc.
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buildHook =
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''
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echo
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echo '=== Checking the generated Apache configuration file ==='
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${httpd}/bin/httpd -f ${httpdConf} -t || true
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'';
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description = "Apache HTTPD";
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startOn = "started networking and filesystem"
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# Hacky. Some subservices depend on Postgres
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# (e.g. Mediawiki), but they don't have a way to declare
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# that dependency. So just start httpd after postgresql if
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# the latter is enabled.
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+ optionalString config.services.postgresql.enable " and started postgresql";
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path =
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[ httpd pkgs.coreutils pkgs.gnugrep ]
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++ # Needed for PHP's mail() function. !!! Probably the
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# ssmtp module should export the path to sendmail in
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# some way.
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optional config.networking.defaultMailServer.directDelivery pkgs.ssmtp
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++ concatMap (svc: svc.extraServerPath) allSubservices;
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environment =
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{ PHPRC = if enablePHP then phpIni else "";
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TZ = config.time.timeZone;
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} // (listToAttrs (concatMap (svc: svc.globalEnvVars) allSubservices));
|
|
|
|
preStart =
|
|
''
|
|
mkdir -m 0700 -p ${mainCfg.stateDir}
|
|
mkdir -m 0700 -p ${mainCfg.logDir}
|
|
|
|
${optionalString (mainCfg.documentRoot != null)
|
|
''
|
|
# Create the document root directory if does not exists yet
|
|
mkdir -p ${mainCfg.documentRoot}
|
|
''
|
|
}
|
|
|
|
# Get rid of old semaphores. These tend to accumulate across
|
|
# server restarts, eventually preventing it from restarting
|
|
# succesfully.
|
|
for i in $(${pkgs.utillinux}/bin/ipcs -s | grep ' ${mainCfg.user} ' | cut -f2 -d ' '); do
|
|
${pkgs.utillinux}/bin/ipcrm -s $i
|
|
done
|
|
|
|
# Run the startup hooks for the subservices.
|
|
for i in ${toString (map (svn: svn.startupScript) allSubservices)}; do
|
|
echo Running Apache startup hook $i...
|
|
$i
|
|
done
|
|
'';
|
|
|
|
daemonType = "fork";
|
|
|
|
exec = "httpd -f ${httpdConf}";
|
|
|
|
preStop =
|
|
''
|
|
${httpd}/bin/httpd -f ${httpdConf} -k graceful-stop
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
}
|