commit c00240e41e89becffe6f05a2df5f781ab76f863f · pyrox.dev/nixpkgs

+59 -12

nixos/modules/services/web-servers/uwsgi.nix

···

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       let

     

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         cfg = config.services.uwsgi;

     

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         isEmperor = cfg.instance.type == "emperor";

     

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       +
       

     

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         imperialPowers =

     

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           [

     

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             # spawn other user processes

     

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             "CAP_SETUID" "CAP_SETGID"

     

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             "CAP_SYS_CHROOT"

     

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             # transfer capabilities

     

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             "CAP_SETPCAP"

     

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             # create other user sockets

     

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             "CAP_CHOWN"

     

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           ];

     

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       +
       

     

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         buildCfg = name: c:

     

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           let

     

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             plugins =

     

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               if any (n: !any (m: m == n) cfg.plugins) (c.plugins or [])

     

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               then throw "`plugins` attribute in UWSGI configuration contains plugins not in config.services.uwsgi.plugins"

     

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               then throw "`plugins` attribute in uWSGI configuration contains plugins not in config.services.uwsgi.plugins"

     

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               else c.plugins or cfg.plugins;

     

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             hasPython = v: filter (n: n == "python${v}") plugins != [];

     
···

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             python =

     

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               if hasPython2 && hasPython3 then

     

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                 throw "`plugins` attribute in UWSGI configuration shouldn't contain both python2 and python3"

     

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                 throw "`plugins` attribute in uWSGI configuration shouldn't contain both python2 and python3"

     

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               else if hasPython2 then cfg.package.python2

     

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               else if hasPython3 then cfg.package.python3

     

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               else null;

     
···

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                             oldPaths = filter (x: x != null) (map getPath env');

     

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                         in env' ++ [ "PATH=${optionalString (oldPaths != []) "${last oldPaths}:"}${pythonEnv}/bin" ];

     

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                     }

     

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                 else if c.type == "emperor"

     

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                 else if isEmperor

     

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                   then {

     

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                     emperor = if builtins.typeOf c.vassals != "set" then c.vassals

     

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                               else pkgs.buildEnv {

     
···

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                                 paths = mapAttrsToList buildCfg c.vassals;

     

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                               };

     

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                   } // removeAttrs c [ "type" "vassals" ]

     

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                 else throw "`type` attribute in UWSGI configuration should be either 'normal' or 'emperor'";

     

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                 else throw "`type` attribute in uWSGI configuration should be either 'normal' or 'emperor'";

     

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             };

     

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           in pkgs.writeTextDir "${name}.json" (builtins.toJSON uwsgiCfg);

     
···

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             };

     

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             instance = mkOption {

     

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               type =  with lib.types; let

     

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               type =  with types; let

     

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                 valueType = nullOr (oneOf [

     

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                   bool

     

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                   int

     
···

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             user = mkOption {

     

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               type = types.str;

     

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               default = "uwsgi";

     

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               description = "User account under which uwsgi runs.";

     

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               description = "User account under which uWSGI runs.";

     

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             };

     

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             group = mkOption {

     

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               type = types.str;

     

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               default = "uwsgi";

     

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               description = "Group account under which uwsgi runs.";

     

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               description = "Group account under which uWSGI runs.";

     

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             };

     

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             capabilities = mkOption {

     

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               type = types.listOf types.str;

     

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               apply = caps: caps ++ optionals isEmperor imperialPowers;

     

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               default = [ ];

     

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               example = literalExample ''

     

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                 [

     

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                   "CAP_NET_BIND_SERVICE" # bind on ports <1024

     

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                   "CAP_NET_RAW"          # open raw sockets

     

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                 ]

     

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               '';

     

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               description = ''

     

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                 Grant capabilities to the uWSGI instance. See the

     

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                 <literal>capabilities(7)</literal> for available values.

     

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                 <note>

     

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                   <para>

     

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                     uWSGI runs as an unprivileged user (even as Emperor) with the minimal

     

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                     capabilities required. This option can be used to add fine-grained

     

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                     permissions without running the service as root.

     

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                   </para>

     

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                   <para>

     

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                     When in Emperor mode, any capability to be inherited by a vassal must

     

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                     be specified again in the vassal configuration using <literal>cap</literal>.

     

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                     See the uWSGI <link

     

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                     xlink:href="https://uwsgi-docs.readthedocs.io/en/latest/Capabilities.html">docs</link>

     

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                     for more information.

     

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                   </para>

     

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                 </note>

     

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               '';

     

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             };

     

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           };

     

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         };

     

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         config = mkIf cfg.enable {

     

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           systemd.tmpfiles.rules = optional (cfg.runDir != "/run/uwsgi") ''

     

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             d ${cfg.runDir} 775 ${cfg.user} ${cfg.group}

     

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           '';

     

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           systemd.services.uwsgi = {

     

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             wantedBy = [ "multi-user.target" ];

     

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             preStart = ''

     

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               mkdir -p ${cfg.runDir}

     

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               chown ${cfg.user}:${cfg.group} ${cfg.runDir}

     

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             '';

     

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             serviceConfig = {

     

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               User = cfg.user;

     

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               Group = cfg.group;

     

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               Type = "notify";

     

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               ExecStart = "${cfg.package}/bin/uwsgi --uid ${cfg.user} --gid ${cfg.group} --json ${buildCfg "server" cfg.instance}/server.json";

     

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               ExecStart = "${cfg.package}/bin/uwsgi --json ${buildCfg "server" cfg.instance}/server.json";

     

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               ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";

     

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               ExecStop = "${pkgs.coreutils}/bin/kill -INT $MAINPID";

     

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               NotifyAccess = "main";

     

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               KillSignal = "SIGQUIT";

     

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               AmbientCapabilities = cfg.capabilities;

     

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               CapabilityBoundingSet = cfg.capabilities;

     

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             };

     

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           };

     

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+45 -16

nixos/tests/uwsgi.nix

···

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         };

     

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         machine = { pkgs, ... }: {

     

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           services.uwsgi.enable = true;

     

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           services.uwsgi.plugins = [ "python3" "php" ];

     

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           services.uwsgi.instance = {

     

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             type = "emperor";

     

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             vassals.python = {

     

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           users.users.hello  =

     

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             { isSystemUser = true;

     

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               group = "hello";

     

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             };

     

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           users.groups.hello = { };

     

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           services.uwsgi = {

     

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             enable = true;

     

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             plugins = [ "python3" "php" ];

     

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             capabilities = [ "CAP_NET_BIND_SERVICE" ];

     

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             instance.type = "emperor";

     

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             instance.vassals.hello = {

     

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               type = "normal";

     

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               master = true;

     

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               workers = 2;

     

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               http = ":8000";

     

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               immediate-uid = "hello";

     

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               immediate-gid = "hello";

     

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               module = "wsgi:application";

     

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               http = ":80";

     

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               cap = "net_bind_service";

     

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               pythonPackages = self: [ self.flask ];

     

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               chdir = pkgs.writeTextDir "wsgi.py" ''

     

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                 from flask import Flask

     

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                 import subprocess

     

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                 application = Flask(__name__)

     

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                 @application.route("/")

     

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                 def hello():

     

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                     return "Hello World!"

     

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                     return "Hello, World!"

     

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                 @application.route("/whoami")

     

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                 def whoami():

     

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                     whoami = "${pkgs.coreutils}/bin/whoami"

     

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                     proc = subprocess.run(whoami, capture_output=True)

     

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                     return proc.stdout.decode().strip()

     

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               '';

     

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               pythonPackages = self: with self; [ flask ];

     

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             };

     

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             vassals.php = {

     

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             instance.vassals.php = {

     

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               type = "normal";

     

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               master = true;

     

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               workers = 2;

     

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               http-socket = ":8001";

     

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               http-socket = ":8000";

     

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               http-socket-modifier1 = 14;

     

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               php-index = "index.php";

     

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               php-docroot = pkgs.writeTextDir "index.php" ''

     
···

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           ''

     

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             machine.wait_for_unit("multi-user.target")

     

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             machine.wait_for_unit("uwsgi.service")

     

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             machine.wait_for_open_port(8000)

     

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             machine.wait_for_open_port(8001)

     

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             assert "Hello World" in machine.succeed("curl -fv 127.0.0.1:8000")

     

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             assert "Hello World" in machine.succeed("curl -fv 127.0.0.1:8001")

     

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             with subtest("uWSGI has started"):

     

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                 machine.wait_for_unit("uwsgi.service")

     

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             with subtest("Vassal can bind on port <1024"):

     

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                 machine.wait_for_open_port(80)

     

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                 hello = machine.succeed("curl -f http://machine").strip()

     

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                 assert "Hello, World!" in hello, f"Excepted 'Hello, World!', got '{hello}'"

     

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       +
       

     

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             with subtest("Vassal is running as dedicated user"):

     

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                 username = machine.succeed("curl -f http://machine/whoami").strip()

     

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                 assert username == "hello", f"Excepted 'hello', got '{username}'"

     

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       +
       

     

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             with subtest("PHP plugin is working"):

     

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                 machine.wait_for_open_port(8000)

     

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                 assert "Hello World" in machine.succeed("curl -fv http://machine:8000")

     

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           '';

     

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       })