2016-07-18 22:50:27 +00:00
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#include <cstdlib>
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#include <cstring>
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#include <algorithm>
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2017-01-10 15:29:06 +00:00
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#include <set>
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2016-07-18 22:50:27 +00:00
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#include <memory>
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#include <tuple>
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#include <iomanip>
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2017-01-24 12:57:26 +00:00
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#if __APPLE__
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2017-01-24 11:22:02 +00:00
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#include <sys/time.h>
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#endif
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2016-07-18 22:50:27 +00:00
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2017-05-02 11:17:37 +00:00
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#include "machines.hh"
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2016-07-18 22:50:27 +00:00
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#include "shared.hh"
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#include "pathlocks.hh"
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#include "globals.hh"
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#include "serialise.hh"
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#include "store-api.hh"
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#include "derivations.hh"
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2017-10-23 17:06:55 +00:00
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#include "local-store.hh"
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2021-01-26 11:22:24 +00:00
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#include "legacy.hh"
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2016-07-18 22:50:27 +00:00
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using namespace nix;
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using std::cin;
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2017-03-03 15:18:49 +00:00
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static void handleAlarm(int sig) {
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2016-07-18 22:50:27 +00:00
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}
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2017-05-01 15:35:30 +00:00
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std::string escapeUri(std::string uri)
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{
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std::replace(uri.begin(), uri.end(), '/', '_');
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return uri;
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}
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2016-07-18 22:50:27 +00:00
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static string currentLoad;
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2020-07-30 11:10:49 +00:00
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static AutoCloseFD openSlotLock(const Machine & m, uint64_t slot)
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2017-01-24 14:28:50 +00:00
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{
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2017-05-01 15:35:30 +00:00
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return openLockFile(fmt("%s/%s-%d", currentLoad, escapeUri(m.storeUri), slot), true);
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2016-07-18 22:50:27 +00:00
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}
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2020-08-12 16:32:36 +00:00
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static bool allSupportedLocally(Store & store, const std::set<std::string>& requiredFeatures) {
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2019-03-06 05:03:25 +00:00
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for (auto & feature : requiredFeatures)
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2020-08-12 16:32:36 +00:00
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if (!store.systemFeatures.get().count(feature)) return false;
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2019-03-06 05:03:25 +00:00
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return true;
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}
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2020-10-06 11:36:55 +00:00
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static int main_build_remote(int argc, char * * argv)
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2016-07-18 22:50:27 +00:00
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{
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2018-10-26 09:35:46 +00:00
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{
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2017-10-24 11:41:52 +00:00
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logger = makeJSONLogger(*logger);
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2016-07-18 22:50:27 +00:00
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/* Ensure we don't get any SSH passphrase or host key popups. */
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2017-05-01 15:35:30 +00:00
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unsetenv("DISPLAY");
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unsetenv("SSH_ASKPASS");
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2016-07-18 22:50:27 +00:00
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2021-01-28 14:37:43 +00:00
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/* If we ever use the common args framework, make sure to
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remove initPlugins below and initialize settings first.
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*/
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2017-10-23 18:43:04 +00:00
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if (argc != 2)
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2016-07-18 22:50:27 +00:00
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throw UsageError("called without required arguments");
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2017-10-23 18:43:04 +00:00
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verbosity = (Verbosity) std::stoll(argv[1]);
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FdSource source(STDIN_FILENO);
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/* Read the parent's settings. */
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while (readInt(source)) {
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auto name = readString(source);
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auto value = readString(source);
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settings.set(name, value);
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}
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settings.maxBuildJobs.set("1"); // hack to make tests with local?root= work
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2016-07-18 22:50:27 +00:00
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2018-02-08 16:26:18 +00:00
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initPlugins();
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2020-12-20 17:07:28 +00:00
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auto store = openStore();
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2016-07-18 22:50:27 +00:00
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2017-05-01 13:46:47 +00:00
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/* It would be more appropriate to use $XDG_RUNTIME_DIR, since
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2017-07-30 10:28:50 +00:00
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that gets cleared on reboot, but it wouldn't work on macOS. */
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2021-01-22 15:21:12 +00:00
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auto currentLoadName = "/current-load";
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2020-12-20 17:07:28 +00:00
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if (auto localStore = store.dynamic_pointer_cast<LocalFSStore>())
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2021-01-22 15:21:12 +00:00
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currentLoad = std::string { localStore->stateDir } + currentLoadName;
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2020-12-20 17:07:28 +00:00
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else
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2021-01-22 15:21:12 +00:00
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currentLoad = settings.nixStateDir + currentLoadName;
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2016-07-18 22:50:27 +00:00
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std::shared_ptr<Store> sshStore;
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AutoCloseFD bestSlotLock;
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2017-05-02 11:44:10 +00:00
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auto machines = getMachines();
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2017-05-01 12:43:14 +00:00
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debug("got %d remote builders", machines.size());
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2017-05-02 10:16:29 +00:00
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if (machines.empty()) {
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std::cerr << "# decline-permanently\n";
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2018-10-26 09:35:46 +00:00
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return 0;
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2017-05-02 10:16:29 +00:00
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}
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2019-12-05 18:11:09 +00:00
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std::optional<StorePath> drvPath;
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2017-05-01 15:35:30 +00:00
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string storeUri;
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2017-10-23 18:43:04 +00:00
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while (true) {
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try {
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auto s = readString(source);
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2018-10-26 09:35:46 +00:00
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if (s != "try") return 0;
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} catch (EndOfFile &) { return 0; }
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2017-10-23 18:43:04 +00:00
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auto amWilling = readInt(source);
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auto neededSystem = readString(source);
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2019-12-05 18:11:09 +00:00
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drvPath = store->parseStorePath(readString(source));
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2017-10-23 18:43:04 +00:00
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auto requiredFeatures = readStrings<std::set<std::string>>(source);
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2020-08-05 16:58:00 +00:00
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auto canBuildLocally = amWilling
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2019-03-06 05:03:25 +00:00
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&& ( neededSystem == settings.thisSystem
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|| settings.extraPlatforms.get().count(neededSystem) > 0)
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2020-08-12 16:32:36 +00:00
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&& allSupportedLocally(*store, requiredFeatures);
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2016-07-18 22:50:27 +00:00
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/* Error ignored here, will be caught later */
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mkdir(currentLoad.c_str(), 0777);
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while (true) {
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bestSlotLock = -1;
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AutoCloseFD lock = openLockFile(currentLoad + "/main-lock", true);
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lockFile(lock.get(), ltWrite, true);
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bool rightType = false;
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2017-03-03 15:18:49 +00:00
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Machine * bestMachine = nullptr;
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2020-07-30 11:10:49 +00:00
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uint64_t bestLoad = 0;
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2016-07-18 22:50:27 +00:00
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for (auto & m : machines) {
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2017-10-23 18:43:04 +00:00
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debug("considering building on remote machine '%s'", m.storeUri);
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2017-05-01 15:35:30 +00:00
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2016-07-18 22:50:27 +00:00
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if (m.enabled && std::find(m.systemTypes.begin(),
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m.systemTypes.end(),
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neededSystem) != m.systemTypes.end() &&
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m.allSupported(requiredFeatures) &&
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m.mandatoryMet(requiredFeatures)) {
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rightType = true;
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AutoCloseFD free;
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2020-07-30 11:10:49 +00:00
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uint64_t load = 0;
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for (uint64_t slot = 0; slot < m.maxJobs; ++slot) {
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2017-01-25 11:51:35 +00:00
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auto slotLock = openSlotLock(m, slot);
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2016-07-18 22:50:27 +00:00
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if (lockFile(slotLock.get(), ltWrite, false)) {
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if (!free) {
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free = std::move(slotLock);
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}
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} else {
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++load;
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}
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}
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if (!free) {
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continue;
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}
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bool best = false;
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if (!bestSlotLock) {
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best = true;
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} else if (load / m.speedFactor < bestLoad / bestMachine->speedFactor) {
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best = true;
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} else if (load / m.speedFactor == bestLoad / bestMachine->speedFactor) {
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if (m.speedFactor > bestMachine->speedFactor) {
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best = true;
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} else if (m.speedFactor == bestMachine->speedFactor) {
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if (load < bestLoad) {
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best = true;
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}
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}
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}
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if (best) {
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bestLoad = load;
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bestSlotLock = std::move(free);
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bestMachine = &m;
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}
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}
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}
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if (!bestSlotLock) {
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2017-03-03 15:18:49 +00:00
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if (rightType && !canBuildLocally)
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std::cerr << "# postpone\n";
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else
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2020-08-05 16:58:00 +00:00
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{
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// build the hint template.
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2021-01-20 23:27:36 +00:00
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string errorText =
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"Failed to find a machine for remote build!\n"
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"derivation: %s\nrequired (system, features): (%s, %s)";
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errorText += "\n%s available machines:";
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errorText += "\n(systems, maxjobs, supportedFeatures, mandatoryFeatures)";
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2020-08-05 16:58:00 +00:00
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2021-01-20 23:27:36 +00:00
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for (unsigned int i = 0; i < machines.size(); ++i)
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errorText += "\n(%s, %s, %s, %s)";
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2020-08-05 16:58:00 +00:00
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// add the template values.
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2020-08-05 17:26:06 +00:00
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string drvstr;
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if (drvPath.has_value())
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drvstr = drvPath->to_string();
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else
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drvstr = "<unknown>";
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2021-01-20 23:27:36 +00:00
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auto error = hintformat(errorText);
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error
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% drvstr
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% neededSystem
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% concatStringsSep<StringSet>(", ", requiredFeatures)
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% machines.size();
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for (auto & m : machines)
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error
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% concatStringsSep<vector<string>>(", ", m.systemTypes)
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% m.maxJobs
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% concatStringsSep<StringSet>(", ", m.supportedFeatures)
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% concatStringsSep<StringSet>(", ", m.mandatoryFeatures);
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2020-08-05 16:58:00 +00:00
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2021-01-20 23:27:36 +00:00
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printMsg(canBuildLocally ? lvlChatty : lvlWarn, error);
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2020-08-05 16:58:00 +00:00
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2017-03-03 15:18:49 +00:00
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std::cerr << "# decline\n";
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2020-08-05 16:58:00 +00:00
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}
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2016-07-18 22:50:27 +00:00
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break;
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}
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2017-01-24 11:22:02 +00:00
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#if __APPLE__
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futimes(bestSlotLock.get(), NULL);
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#else
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2016-07-18 22:50:27 +00:00
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futimens(bestSlotLock.get(), NULL);
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2017-01-24 11:22:02 +00:00
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#endif
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2016-07-18 22:50:27 +00:00
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lock = -1;
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try {
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2017-05-01 15:35:30 +00:00
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2017-10-24 11:41:52 +00:00
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Activity act(*logger, lvlTalkative, actUnknown, fmt("connecting to '%s'", bestMachine->storeUri));
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2020-08-12 16:32:36 +00:00
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sshStore = bestMachine->openStore();
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2017-05-02 12:18:46 +00:00
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sshStore->connect();
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2017-05-01 15:35:30 +00:00
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storeUri = bestMachine->storeUri;
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2016-07-18 22:50:27 +00:00
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} catch (std::exception & e) {
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2018-03-20 14:17:59 +00:00
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auto msg = chomp(drainFD(5, false));
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2021-01-20 23:27:36 +00:00
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printError("cannot build on '%s': %s%s",
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bestMachine->storeUri, e.what(),
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msg.empty() ? "" : ": " + msg);
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2016-07-18 22:50:27 +00:00
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bestMachine->enabled = false;
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continue;
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}
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2017-05-01 15:35:30 +00:00
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2016-07-18 22:50:27 +00:00
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goto connected;
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}
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}
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2017-03-03 15:18:49 +00:00
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2016-07-18 22:50:27 +00:00
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connected:
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2018-03-20 14:17:59 +00:00
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close(5);
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2017-10-24 12:24:57 +00:00
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std::cerr << "# accept\n" << storeUri << "\n";
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2017-05-01 15:35:30 +00:00
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2017-10-23 18:43:04 +00:00
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auto inputs = readStrings<PathSet>(source);
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2021-01-26 09:48:41 +00:00
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auto wantedOutputs = readStrings<StringSet>(source);
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2017-05-01 15:35:30 +00:00
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2017-10-24 12:47:23 +00:00
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AutoCloseFD uploadLock = openLockFile(currentLoad + "/" + escapeUri(storeUri) + ".upload-lock", true);
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2017-10-24 11:41:52 +00:00
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{
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Activity act(*logger, lvlTalkative, actUnknown, fmt("waiting for the upload lock to '%s'", storeUri));
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2017-05-01 15:35:30 +00:00
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2017-10-24 11:41:52 +00:00
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auto old = signal(SIGALRM, handleAlarm);
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alarm(15 * 60);
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if (!lockFile(uploadLock.get(), ltWrite, true))
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printError("somebody is hogging the upload lock for '%s', continuing...");
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alarm(0);
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signal(SIGALRM, old);
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2017-10-24 12:47:23 +00:00
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}
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2018-01-09 21:40:07 +00:00
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auto substitute = settings.buildersUseSubstitutes ? Substitute : NoSubstitute;
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2017-10-24 12:47:23 +00:00
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{
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Activity act(*logger, lvlTalkative, actUnknown, fmt("copying dependencies to '%s'", storeUri));
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2019-12-05 18:11:09 +00:00
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copyPaths(store, ref<Store>(sshStore), store->parseStorePathSet(inputs), NoRepair, NoCheckSigs, substitute);
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2017-10-24 11:41:52 +00:00
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}
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2016-07-18 22:50:27 +00:00
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2017-10-24 12:47:23 +00:00
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uploadLock = -1;
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2020-06-12 11:04:52 +00:00
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auto drv = store->readDerivation(*drvPath);
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2021-01-26 09:48:41 +00:00
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auto outputHashes = staticOutputHashes(*store, drv);
|
2021-06-21 12:16:13 +00:00
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// Hijack the inputs paths of the derivation to include all the paths
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// that come from the `inputDrvs` set.
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// We don’t do that for the derivations whose `inputDrvs` is empty
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// because
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// 1. It’s not needed
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|
// 2. Changing the `inputSrcs` set changes the associated output ids,
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|
// which break CA derivations
|
|
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|
|
if (!drv.inputDrvs.empty())
|
|
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|
drv.inputSrcs = store->parseStorePathSet(inputs);
|
2017-05-01 13:00:39 +00:00
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|
2019-12-05 18:11:09 +00:00
|
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|
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auto result = sshStore->buildDerivation(*drvPath, drv);
|
2017-05-08 12:27:12 +00:00
|
|
|
|
|
|
|
|
|
if (!result.success())
|
2019-12-05 18:11:09 +00:00
|
|
|
|
throw Error("build of '%s' on '%s' failed: %s", store->printStorePath(*drvPath), storeUri, result.errorMsg);
|
2016-07-18 22:50:27 +00:00
|
|
|
|
|
2021-01-26 09:48:41 +00:00
|
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|
|
std::set<Realisation> missingRealisations;
|
|
|
|
|
StorePathSet missingPaths;
|
2021-02-26 15:34:33 +00:00
|
|
|
|
if (settings.isExperimentalFeatureEnabled("ca-derivations") && !derivationHasKnownOutputPaths(drv.type())) {
|
2021-01-26 09:48:41 +00:00
|
|
|
|
for (auto & outputName : wantedOutputs) {
|
|
|
|
|
auto thisOutputHash = outputHashes.at(outputName);
|
|
|
|
|
auto thisOutputId = DrvOutput{ thisOutputHash, outputName };
|
|
|
|
|
if (!store->queryRealisation(thisOutputId)) {
|
2021-02-26 15:29:30 +00:00
|
|
|
|
debug("missing output %s", outputName);
|
2021-01-26 09:48:41 +00:00
|
|
|
|
assert(result.builtOutputs.count(thisOutputId));
|
|
|
|
|
auto newRealisation = result.builtOutputs.at(thisOutputId);
|
|
|
|
|
missingRealisations.insert(newRealisation);
|
|
|
|
|
missingPaths.insert(newRealisation.outPath);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
auto outputPaths = drv.outputsAndOptPaths(*store);
|
|
|
|
|
for (auto & [outputName, hopefullyOutputPath] : outputPaths) {
|
|
|
|
|
assert(hopefullyOutputPath.second);
|
|
|
|
|
if (!store->isValidPath(*hopefullyOutputPath.second))
|
|
|
|
|
missingPaths.insert(*hopefullyOutputPath.second);
|
|
|
|
|
}
|
|
|
|
|
}
|
2017-03-16 12:50:01 +00:00
|
|
|
|
|
2021-01-26 09:48:41 +00:00
|
|
|
|
if (!missingPaths.empty()) {
|
2017-10-24 12:47:23 +00:00
|
|
|
|
Activity act(*logger, lvlTalkative, actUnknown, fmt("copying outputs from '%s'", storeUri));
|
2020-12-20 17:07:28 +00:00
|
|
|
|
if (auto localStore = store.dynamic_pointer_cast<LocalStore>())
|
2021-01-26 09:48:41 +00:00
|
|
|
|
for (auto & path : missingPaths)
|
|
|
|
|
localStore->locksHeld.insert(store->printStorePath(path)); /* FIXME: ugly */
|
|
|
|
|
copyPaths(ref<Store>(sshStore), store, missingPaths, NoRepair, NoCheckSigs, NoSubstitute);
|
2016-07-18 22:50:27 +00:00
|
|
|
|
}
|
2021-02-26 15:29:37 +00:00
|
|
|
|
// XXX: Should be done as part of `copyPaths`
|
2021-01-26 08:36:24 +00:00
|
|
|
|
for (auto & realisation : missingRealisations) {
|
|
|
|
|
// Should hold, because if the feature isn't enabled the set
|
|
|
|
|
// of missing realisations should be empty
|
|
|
|
|
settings.requireExperimentalFeature("ca-derivations");
|
|
|
|
|
store->registerDrvOutput(realisation);
|
2016-07-18 22:50:27 +00:00
|
|
|
|
}
|
2017-03-16 12:50:01 +00:00
|
|
|
|
|
2018-10-26 09:35:46 +00:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
2016-07-18 22:50:27 +00:00
|
|
|
|
}
|
2018-10-26 09:35:46 +00:00
|
|
|
|
|
2020-10-06 11:36:55 +00:00
|
|
|
|
static RegisterLegacyCommand r_build_remote("build-remote", main_build_remote);
|