79f9dee3c4
* guix/scripts/discover.scm: New file. * Makefile.am (MODULES): Add it. * nix/nix-daemon/guix-daemon.cc (options): Add "discover" option, (parse-opt): parse it, (main): start "guix discover" process when the option is set. * guix/scripts/substitute.scm (%local-substitute-urls): New variable, (substitute-urls): add it. * gnu/services/base.scm (<guix-configuration>): Add "discover?" field, (guix-shepherd-service): honor it. * doc/guix.texi (Invoking guix-daemon): Document "discover" option, (Base Services): ditto.
546 lines
16 KiB
C++
546 lines
16 KiB
C++
/* GNU Guix --- Functional package management for GNU
|
||
Copyright (C) 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
|
||
Copyright (C) 2006, 2010, 2012, 2014 Eelco Dolstra <e.dolstra@tudelft.nl>
|
||
|
||
This file is part of GNU Guix.
|
||
|
||
GNU Guix is free software; you can redistribute it and/or modify it
|
||
under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or (at
|
||
your option) any later version.
|
||
|
||
GNU Guix is distributed in the hope that it will be useful, but
|
||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include <config.h>
|
||
|
||
#include <types.hh>
|
||
#include "shared.hh"
|
||
#include <globals.hh>
|
||
#include <util.hh>
|
||
|
||
#include <gcrypt.h>
|
||
|
||
#include <stdlib.h>
|
||
#include <argp.h>
|
||
#include <unistd.h>
|
||
#include <sys/types.h>
|
||
#include <sys/stat.h>
|
||
#include <sys/socket.h>
|
||
#include <sys/un.h>
|
||
#include <netdb.h>
|
||
#include <strings.h>
|
||
#include <exception>
|
||
#include <iostream>
|
||
|
||
#include <libintl.h>
|
||
#include <locale.h>
|
||
|
||
/* Variables used by `nix-daemon.cc'. */
|
||
volatile ::sig_atomic_t blockInt;
|
||
char **argvSaved;
|
||
|
||
using namespace nix;
|
||
|
||
/* Entry point in `nix-daemon.cc'. */
|
||
extern void run (const std::vector<int> &);
|
||
|
||
|
||
/* Command-line options. */
|
||
|
||
#define n_(str) str
|
||
#define _(str) gettext (str)
|
||
static const char guix_textdomain[] = "guix";
|
||
|
||
|
||
const char *argp_program_version =
|
||
"guix-daemon (" PACKAGE_NAME ") " PACKAGE_VERSION;
|
||
const char *argp_program_bug_address = PACKAGE_BUGREPORT;
|
||
|
||
static char doc[] =
|
||
n_("guix-daemon -- perform derivation builds and store accesses")
|
||
"\v\n"
|
||
n_("This program is a daemon meant to run in the background. It serves \
|
||
requests sent over a Unix-domain socket. It accesses the store, and \
|
||
builds derivations on behalf of its clients.");
|
||
|
||
#define GUIX_OPT_SYSTEM 1
|
||
#define GUIX_OPT_DISABLE_CHROOT 2
|
||
#define GUIX_OPT_BUILD_USERS_GROUP 3
|
||
#define GUIX_OPT_CACHE_FAILURES 4
|
||
#define GUIX_OPT_LOSE_LOGS 5
|
||
#define GUIX_OPT_DISABLE_LOG_COMPRESSION 6
|
||
#define GUIX_OPT_DISABLE_DEDUPLICATION 7
|
||
#define GUIX_OPT_IMPERSONATE_LINUX_26 8
|
||
#define GUIX_OPT_DEBUG 9
|
||
#define GUIX_OPT_CHROOT_DIR 10
|
||
#define GUIX_OPT_LISTEN 11
|
||
#define GUIX_OPT_NO_SUBSTITUTES 12
|
||
#define GUIX_OPT_SUBSTITUTE_URLS 13
|
||
#define GUIX_OPT_NO_BUILD_HOOK 14
|
||
#define GUIX_OPT_GC_KEEP_OUTPUTS 15
|
||
#define GUIX_OPT_GC_KEEP_DERIVATIONS 16
|
||
#define GUIX_OPT_BUILD_ROUNDS 17
|
||
#define GUIX_OPT_TIMEOUT 18
|
||
#define GUIX_OPT_MAX_SILENT_TIME 19
|
||
#define GUIX_OPT_LOG_COMPRESSION 20
|
||
#define GUIX_OPT_DISCOVER 21
|
||
|
||
static const struct argp_option options[] =
|
||
{
|
||
{ "system", GUIX_OPT_SYSTEM, n_("SYSTEM"), 0,
|
||
n_("assume SYSTEM as the current system type") },
|
||
{ "cores", 'c', n_("N"), 0,
|
||
n_("use N CPU cores to build each derivation; 0 means as many as available")
|
||
},
|
||
{ "max-jobs", 'M', n_("N"), 0,
|
||
n_("allow at most N build jobs") },
|
||
{ "timeout", GUIX_OPT_TIMEOUT, n_("SECONDS"), 0,
|
||
n_("mark builds as failed after SECONDS of activity") },
|
||
{ "max-silent-time", GUIX_OPT_MAX_SILENT_TIME, n_("SECONDS"), 0,
|
||
n_("mark builds as failed after SECONDS of silence") },
|
||
{ "disable-chroot", GUIX_OPT_DISABLE_CHROOT, 0, 0,
|
||
n_("disable chroot builds") },
|
||
{ "chroot-directory", GUIX_OPT_CHROOT_DIR, n_("DIR"), 0,
|
||
n_("add DIR to the build chroot") },
|
||
{ "build-users-group", GUIX_OPT_BUILD_USERS_GROUP, n_("GROUP"), 0,
|
||
n_("perform builds as a user of GROUP") },
|
||
{ "no-substitutes", GUIX_OPT_NO_SUBSTITUTES, 0, 0,
|
||
n_("do not use substitutes") },
|
||
{ "substitute-urls", GUIX_OPT_SUBSTITUTE_URLS, n_("URLS"), 0,
|
||
n_("use URLS as the default list of substitute providers") },
|
||
{ "no-offload", GUIX_OPT_NO_BUILD_HOOK, 0, 0,
|
||
n_("do not attempt to offload builds") },
|
||
{ "no-build-hook", GUIX_OPT_NO_BUILD_HOOK, 0,
|
||
OPTION_HIDDEN, // deprecated
|
||
n_("do not attempt to offload builds") },
|
||
{ "cache-failures", GUIX_OPT_CACHE_FAILURES, 0, 0,
|
||
n_("cache build failures") },
|
||
{ "rounds", GUIX_OPT_BUILD_ROUNDS, "N", 0,
|
||
n_("build each derivation N times in a row") },
|
||
{ "lose-logs", GUIX_OPT_LOSE_LOGS, 0, 0,
|
||
n_("do not keep build logs") },
|
||
{ "disable-log-compression", GUIX_OPT_DISABLE_LOG_COMPRESSION, 0,
|
||
OPTION_HIDDEN, // deprecated
|
||
n_("disable compression of the build logs") },
|
||
{ "log-compression", GUIX_OPT_LOG_COMPRESSION, "TYPE", 0,
|
||
n_("use the specified compression type for build logs") },
|
||
{ "discover", GUIX_OPT_DISCOVER, "yes/no", OPTION_ARG_OPTIONAL,
|
||
n_("use substitute servers discovered on the local network") },
|
||
|
||
/* '--disable-deduplication' was known as '--disable-store-optimization'
|
||
up to Guix 0.7 included, so keep the alias around. */
|
||
{ "disable-deduplication", GUIX_OPT_DISABLE_DEDUPLICATION, 0, 0,
|
||
n_("disable automatic file \"deduplication\" in the store") },
|
||
{ "disable-store-optimization", GUIX_OPT_DISABLE_DEDUPLICATION, 0,
|
||
OPTION_ALIAS | OPTION_HIDDEN, NULL },
|
||
|
||
{ "impersonate-linux-2.6", GUIX_OPT_IMPERSONATE_LINUX_26, 0,
|
||
#ifdef HAVE_SYS_PERSONALITY_H
|
||
0,
|
||
#else
|
||
OPTION_HIDDEN,
|
||
#endif
|
||
n_("impersonate Linux 2.6")
|
||
},
|
||
{ "gc-keep-outputs", GUIX_OPT_GC_KEEP_OUTPUTS,
|
||
"yes/no", OPTION_ARG_OPTIONAL,
|
||
n_("tell whether the GC must keep outputs of live derivations") },
|
||
{ "gc-keep-derivations", GUIX_OPT_GC_KEEP_DERIVATIONS,
|
||
"yes/no", OPTION_ARG_OPTIONAL,
|
||
n_("tell whether the GC must keep derivations corresponding \
|
||
to live outputs") },
|
||
|
||
{ "listen", GUIX_OPT_LISTEN, n_("SOCKET"), 0,
|
||
n_("listen for connections on SOCKET") },
|
||
{ "debug", GUIX_OPT_DEBUG, 0, 0,
|
||
n_("produce debugging output") },
|
||
{ 0, 0, 0, 0, 0 }
|
||
};
|
||
|
||
|
||
/* Default port for '--listen' on TCP/IP. */
|
||
#define DEFAULT_GUIX_PORT "44146"
|
||
|
||
/* List of '--listen' options. */
|
||
static std::list<std::string> listen_options;
|
||
|
||
static bool useDiscover = false;
|
||
|
||
/* Convert ARG to a Boolean value, or throw an error if it does not denote a
|
||
Boolean. */
|
||
static bool
|
||
string_to_bool (const char *arg, bool dflt = true)
|
||
{
|
||
if (arg == NULL)
|
||
return dflt;
|
||
else if (strcasecmp (arg, "yes") == 0)
|
||
return true;
|
||
else if (strcasecmp (arg, "no") == 0)
|
||
return false;
|
||
else
|
||
throw nix::Error (format ("'%1%': invalid Boolean value") % arg);
|
||
}
|
||
|
||
/* Parse a single option. */
|
||
static error_t
|
||
parse_opt (int key, char *arg, struct argp_state *state)
|
||
{
|
||
switch (key)
|
||
{
|
||
case GUIX_OPT_DISABLE_CHROOT:
|
||
settings.useChroot = false;
|
||
break;
|
||
case GUIX_OPT_CHROOT_DIR:
|
||
{
|
||
std::string chroot_dirs;
|
||
|
||
chroot_dirs = settings.get ("build-extra-chroot-dirs",
|
||
(std::string) "");
|
||
if (chroot_dirs == "")
|
||
chroot_dirs = arg;
|
||
else
|
||
chroot_dirs = chroot_dirs + " " + arg;
|
||
settings.set("build-extra-chroot-dirs", chroot_dirs);
|
||
break;
|
||
}
|
||
case GUIX_OPT_LOG_COMPRESSION:
|
||
if (strcmp (arg, "none") == 0)
|
||
settings.logCompression = COMPRESSION_NONE;
|
||
else if (strcmp (arg, "gzip") == 0)
|
||
settings.logCompression = COMPRESSION_GZIP;
|
||
#if HAVE_BZLIB_H
|
||
else if (strcmp (arg, "bzip2") == 0)
|
||
settings.logCompression = COMPRESSION_BZIP2;
|
||
#endif
|
||
else
|
||
{
|
||
fprintf (stderr, _("error: %s: unknown compression type\n"), arg);
|
||
exit (EXIT_FAILURE);
|
||
}
|
||
break;
|
||
case GUIX_OPT_DISABLE_LOG_COMPRESSION:
|
||
settings.logCompression = COMPRESSION_NONE;
|
||
break;
|
||
case GUIX_OPT_BUILD_USERS_GROUP:
|
||
settings.buildUsersGroup = arg;
|
||
break;
|
||
case GUIX_OPT_DISABLE_DEDUPLICATION:
|
||
settings.autoOptimiseStore = false;
|
||
break;
|
||
case GUIX_OPT_CACHE_FAILURES:
|
||
settings.cacheFailure = true;
|
||
break;
|
||
case GUIX_OPT_BUILD_ROUNDS:
|
||
{
|
||
char *end;
|
||
unsigned long n = strtoul (arg, &end, 10);
|
||
if (end != arg + strlen (arg))
|
||
{
|
||
fprintf (stderr, _("error: %s: invalid number of rounds\n"), arg);
|
||
exit (EXIT_FAILURE);
|
||
}
|
||
settings.set ("build-repeat", std::to_string (std::max (0UL, n - 1)));
|
||
break;
|
||
}
|
||
case GUIX_OPT_IMPERSONATE_LINUX_26:
|
||
settings.impersonateLinux26 = true;
|
||
break;
|
||
case GUIX_OPT_LOSE_LOGS:
|
||
settings.keepLog = false;
|
||
break;
|
||
case GUIX_OPT_LISTEN:
|
||
listen_options.push_back (arg);
|
||
break;
|
||
case GUIX_OPT_SUBSTITUTE_URLS:
|
||
settings.set ("substitute-urls", arg);
|
||
break;
|
||
case GUIX_OPT_NO_SUBSTITUTES:
|
||
settings.set ("build-use-substitutes", "false");
|
||
break;
|
||
case GUIX_OPT_NO_BUILD_HOOK:
|
||
settings.useBuildHook = false;
|
||
break;
|
||
case GUIX_OPT_DISCOVER:
|
||
useDiscover = string_to_bool (arg);
|
||
settings.set("discover", arg);
|
||
break;
|
||
case GUIX_OPT_DEBUG:
|
||
verbosity = lvlDebug;
|
||
break;
|
||
case GUIX_OPT_GC_KEEP_OUTPUTS:
|
||
settings.gcKeepOutputs = string_to_bool (arg);
|
||
break;
|
||
case GUIX_OPT_GC_KEEP_DERIVATIONS:
|
||
settings.gcKeepDerivations = string_to_bool (arg);
|
||
break;
|
||
case 'c':
|
||
settings.set ("build-cores", arg);
|
||
break;
|
||
case 'M':
|
||
settings.set ("build-max-jobs", arg);
|
||
break;
|
||
case GUIX_OPT_TIMEOUT:
|
||
settings.set ("build-timeout", arg);
|
||
break;
|
||
case GUIX_OPT_MAX_SILENT_TIME:
|
||
settings.set ("build-max-silent-time", arg);
|
||
break;
|
||
case GUIX_OPT_SYSTEM:
|
||
settings.thisSystem = arg;
|
||
break;
|
||
default:
|
||
return (error_t) ARGP_ERR_UNKNOWN;
|
||
}
|
||
|
||
return (error_t) 0;
|
||
}
|
||
|
||
/* Argument parsing. */
|
||
static const struct argp argp =
|
||
{
|
||
options, parse_opt,
|
||
NULL, doc,
|
||
NULL, NULL, // children and help_filter
|
||
guix_textdomain
|
||
};
|
||
|
||
|
||
static int
|
||
open_unix_domain_socket (const char *file)
|
||
{
|
||
/* Create and bind to a Unix domain socket. */
|
||
AutoCloseFD fdSocket = socket (PF_UNIX, SOCK_STREAM, 0);
|
||
if (fdSocket == -1)
|
||
throw SysError (_("cannot create Unix domain socket"));
|
||
|
||
createDirs (dirOf (file));
|
||
|
||
/* Urgh, sockaddr_un allows path names of only 108 characters.
|
||
So chdir to the socket directory so that we can pass a
|
||
relative path name. */
|
||
if (chdir (dirOf (file).c_str ()) == -1)
|
||
throw SysError (_("cannot change current directory"));
|
||
Path fileRel = "./" + baseNameOf (file);
|
||
|
||
struct sockaddr_un addr;
|
||
addr.sun_family = AF_UNIX;
|
||
if (fileRel.size () >= sizeof (addr.sun_path))
|
||
throw Error (format (_("socket file name '%1%' is too long")) % fileRel);
|
||
strcpy (addr.sun_path, fileRel.c_str ());
|
||
|
||
unlink (file);
|
||
|
||
/* Make sure that the socket is created with 0666 permission
|
||
(everybody can connect --- provided they have access to the
|
||
directory containing the socket). */
|
||
mode_t oldMode = umask (0111);
|
||
int res = bind (fdSocket, (struct sockaddr *) &addr, sizeof addr);
|
||
umask (oldMode);
|
||
if (res == -1)
|
||
throw SysError (format (_("cannot bind to socket '%1%'")) % file);
|
||
|
||
if (chdir ("/") == -1) /* back to the root */
|
||
throw SysError (_("cannot change current directory"));
|
||
|
||
if (listen (fdSocket, 5) == -1)
|
||
throw SysError (format (_("cannot listen on socket '%1%'")) % file);
|
||
|
||
return fdSocket.borrow ();
|
||
}
|
||
|
||
/* Return a listening socket for ADDRESS, which has the given LENGTH. */
|
||
static int
|
||
open_inet_socket (const struct sockaddr *address, socklen_t length)
|
||
{
|
||
AutoCloseFD fd = socket (address->sa_family, SOCK_STREAM, 0);
|
||
if (fd == -1)
|
||
throw SysError (_("cannot create TCP socket"));
|
||
|
||
int res = bind (fd, address, length);
|
||
if (res == -1)
|
||
throw SysError (_("cannot bind TCP socket"));
|
||
|
||
if (listen (fd, 5) == -1)
|
||
throw SysError (format (_("cannot listen on TCP socket")));
|
||
|
||
return fd.borrow ();
|
||
}
|
||
|
||
/* Return a list of file descriptors of listening sockets. */
|
||
static std::vector<int>
|
||
listening_sockets (const std::list<std::string> &options)
|
||
{
|
||
std::vector<int> result;
|
||
|
||
if (options.empty ())
|
||
{
|
||
/* Open the default Unix-domain socket. */
|
||
auto fd = open_unix_domain_socket (settings.nixDaemonSocketFile.c_str ());
|
||
result.push_back (fd);
|
||
return result;
|
||
}
|
||
|
||
/* Open the user-specified sockets. */
|
||
for (const std::string& option: options)
|
||
{
|
||
if (option[0] == '/')
|
||
{
|
||
/* Assume OPTION is the file name of a Unix-domain socket. */
|
||
settings.nixDaemonSocketFile = canonPath (option);
|
||
int fd =
|
||
open_unix_domain_socket (settings.nixDaemonSocketFile.c_str ());
|
||
result.push_back (fd);
|
||
}
|
||
else
|
||
{
|
||
/* Assume OPTIONS has the form "HOST" or "HOST:PORT". */
|
||
auto colon = option.find_last_of (":");
|
||
auto host = colon == std::string::npos
|
||
? option : option.substr (0, colon);
|
||
auto port = colon == std::string::npos
|
||
? DEFAULT_GUIX_PORT
|
||
: option.substr (colon + 1, option.size () - colon - 1);
|
||
|
||
struct addrinfo *res, hints;
|
||
|
||
memset (&hints, '\0', sizeof hints);
|
||
hints.ai_socktype = SOCK_STREAM;
|
||
hints.ai_flags = AI_NUMERICSERV | AI_ADDRCONFIG;
|
||
|
||
int err = getaddrinfo (host.c_str(), port.c_str (),
|
||
&hints, &res);
|
||
|
||
if (err != 0)
|
||
throw Error(format ("failed to look up '%1%': %2%")
|
||
% option % gai_strerror (err));
|
||
|
||
printMsg (lvlDebug, format ("listening on '%1%', port '%2%'")
|
||
% host % port);
|
||
|
||
/* XXX: Pick the first result, RES. */
|
||
result.push_back (open_inet_socket (res->ai_addr,
|
||
res->ai_addrlen));
|
||
|
||
freeaddrinfo (res);
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
|
||
int
|
||
main (int argc, char *argv[])
|
||
{
|
||
setlocale (LC_ALL, "");
|
||
bindtextdomain (guix_textdomain, LOCALEDIR);
|
||
textdomain (guix_textdomain);
|
||
|
||
/* Initialize libgcrypt. */
|
||
if (!gcry_check_version (GCRYPT_VERSION))
|
||
{
|
||
fprintf (stderr, _("error: libgcrypt version mismatch\n"));
|
||
exit (EXIT_FAILURE);
|
||
}
|
||
|
||
/* Tell Libgcrypt that initialization has completed, as per the Libgcrypt
|
||
1.6.0 manual (although this does not appear to be strictly needed.) */
|
||
gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
|
||
|
||
/* Set the umask so that the daemon does not end up creating group-writable
|
||
files, which would lead to "suspicious ownership or permission" errors.
|
||
See <http://lists.gnu.org/archive/html/bug-guix/2013-07/msg00033.html>. */
|
||
umask (S_IWGRP | S_IWOTH);
|
||
|
||
#ifndef HAVE_CHROOT
|
||
# error chroot is assumed to be available
|
||
#endif
|
||
|
||
/* Always use chroots by default. */
|
||
settings.useChroot = true;
|
||
|
||
/* Turn automatic deduplication on by default. */
|
||
settings.autoOptimiseStore = true;
|
||
|
||
/* Default to using as many cores as possible and one job at a time. */
|
||
settings.buildCores = 0;
|
||
settings.maxBuildJobs = 1;
|
||
|
||
argvSaved = argv;
|
||
|
||
try
|
||
{
|
||
settings.processEnvironment ();
|
||
|
||
/* Enable substitutes by default. */
|
||
settings.set ("build-use-substitutes", "true");
|
||
|
||
/* Use our substitute server by default. */
|
||
settings.set ("substitute-urls", GUIX_SUBSTITUTE_URLS);
|
||
|
||
#ifdef HAVE_DAEMON_OFFLOAD_HOOK
|
||
/* Use 'guix offload' for distributed builds by default. */
|
||
settings.useBuildHook = true;
|
||
#else
|
||
/* We are not installing any build hook, so disable it. */
|
||
settings.useBuildHook = false;
|
||
#endif
|
||
|
||
argp_parse (&argp, argc, argv, 0, 0, 0);
|
||
|
||
auto sockets = listening_sockets (listen_options);
|
||
|
||
/* Effect all the changes made via 'settings.set'. */
|
||
settings.update ();
|
||
printMsg(lvlDebug,
|
||
format ("build log compression: %1%") % settings.logCompression);
|
||
|
||
if (geteuid () == 0 && settings.buildUsersGroup.empty ())
|
||
fprintf (stderr, _("warning: daemon is running as root, so \
|
||
using `--build-users-group' is highly recommended\n"));
|
||
|
||
if (settings.useChroot)
|
||
{
|
||
std::string chroot_dirs;
|
||
|
||
chroot_dirs = settings.get ("build-extra-chroot-dirs",
|
||
(std::string) "");
|
||
printMsg (lvlDebug,
|
||
format ("extra chroot directories: '%1%'") % chroot_dirs);
|
||
}
|
||
|
||
if (useDiscover)
|
||
{
|
||
Strings args;
|
||
|
||
args.push_back("guix");
|
||
args.push_back("discover");
|
||
|
||
startProcess([&]() {
|
||
execv(settings.guixProgram.c_str(), stringsToCharPtrs(args).data());
|
||
});
|
||
}
|
||
|
||
printMsg (lvlDebug,
|
||
format ("automatic deduplication set to %1%")
|
||
% settings.autoOptimiseStore);
|
||
|
||
printMsg (lvlDebug,
|
||
format ("listening on `%1%'") % settings.nixDaemonSocketFile);
|
||
|
||
run (sockets);
|
||
}
|
||
catch (std::exception &e)
|
||
{
|
||
fprintf (stderr, _("error: %s\n"), e.what ());
|
||
return EXIT_FAILURE;
|
||
}
|
||
|
||
return EXIT_SUCCESS; /* never reached */
|
||
}
|