092d60735b
I.e., how much time the currently runnable steps per system type have been waiting. This is useful for deciding whether to provision more machines.
660 lines
21 KiB
C++
660 lines
21 KiB
C++
#include <iostream>
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#include <thread>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "state.hh"
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#include "build-result.hh"
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#include "shared.hh"
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#include "globals.hh"
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#include "value-to-json.hh"
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using namespace nix;
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State::State()
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{
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hydraData = getEnv("HYDRA_DATA");
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if (hydraData == "") throw Error("$HYDRA_DATA must be set");
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logDir = canonPath(hydraData + "/build-logs");
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machinesFile = getEnv("NIX_REMOTE_SYSTEMS", "/etc/nix/machines");
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machinesFileStat.st_ino = 0;
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machinesFileStat.st_mtime = 0;
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localPlatforms = {settings.thisSystem};
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if (settings.thisSystem == "x86_64-linux")
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localPlatforms.insert("i686-linux");
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}
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void State::loadMachinesFile()
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{
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string contents;
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if (pathExists(machinesFile)) {
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struct stat st;
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if (stat(machinesFile.c_str(), &st) != 0)
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throw SysError(format("getting stats about ‘%1%’") % machinesFile);
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if (st.st_ino == machinesFileStat.st_ino && st.st_mtime == machinesFileStat.st_mtime)
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return;
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printMsg(lvlDebug, "reloading machines");
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contents = readFile(machinesFile);
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machinesFileStat = st;
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} else {
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contents = "localhost " + concatStringsSep(",", localPlatforms)
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+ " - " + int2String(settings.maxBuildJobs) + " 1";
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}
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Machines newMachines, oldMachines;
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{
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auto machines_(machines.lock());
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oldMachines = *machines_;
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}
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for (auto line : tokenizeString<Strings>(contents, "\n")) {
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line = trim(string(line, 0, line.find('#')));
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auto tokens = tokenizeString<std::vector<std::string>>(line);
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if (tokens.size() < 3) continue;
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tokens.resize(7);
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auto machine = std::make_shared<Machine>();
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machine->sshName = tokens[0];
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machine->systemTypes = tokenizeString<StringSet>(tokens[1], ",");
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machine->sshKey = tokens[2];
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if (tokens[3] != "")
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string2Int(tokens[3], machine->maxJobs);
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else
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machine->maxJobs = 1;
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machine->speedFactor = atof(tokens[4].c_str());
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if (tokens[5] == "-") tokens[5] = "";
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machine->supportedFeatures = tokenizeString<StringSet>(tokens[5], ",");
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if (tokens[6] == "-") tokens[6] = "";
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machine->mandatoryFeatures = tokenizeString<StringSet>(tokens[6], ",");
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for (auto & f : machine->mandatoryFeatures)
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machine->supportedFeatures.insert(f);
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/* Re-use the State object of the previous machine with the
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same name. */
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auto i = oldMachines.find(machine->sshName);
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if (i == oldMachines.end())
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printMsg(lvlChatty, format("adding new machine ‘%1%’") % machine->sshName);
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else
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printMsg(lvlChatty, format("updating machine ‘%1%’") % machine->sshName);
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machine->state = i == oldMachines.end()
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? std::make_shared<Machine::State>()
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: i->second->state;
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newMachines[machine->sshName] = machine;
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}
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for (auto & m : oldMachines)
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if (newMachines.find(m.first) == newMachines.end())
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printMsg(lvlInfo, format("removing machine ‘%1%’") % m.first);
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auto machines_(machines.lock());
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*machines_ = newMachines;
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}
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void State::monitorMachinesFile()
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{
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while (true) {
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try {
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// FIXME: use inotify.
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sleep(60);
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loadMachinesFile();
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} catch (std::exception & e) {
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printMsg(lvlError, format("reloading machines file: %1%") % e.what());
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}
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}
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}
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void State::clearBusy(Connection & conn, time_t stopTime)
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{
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pqxx::work txn(conn);
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txn.parameterized
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("update BuildSteps set busy = 0, status = $1, stopTime = $2 where busy = 1")
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((int) bssAborted)
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(stopTime, stopTime != 0).exec();
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txn.exec("update Builds set busy = 0 where finished = 0 and busy = 1");
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txn.commit();
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}
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int State::createBuildStep(pqxx::work & txn, time_t startTime, Build::ptr build, Step::ptr step,
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const std::string & machine, BuildStepStatus status, const std::string & errorMsg, BuildID propagatedFrom)
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{
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/* Acquire an exclusive lock on BuildSteps to ensure that we don't
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race with other threads creating a step of the same build. */
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txn.exec("lock table BuildSteps in exclusive mode");
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auto res = txn.parameterized("select max(stepnr) from BuildSteps where build = $1")(build->id).exec();
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int stepNr = res[0][0].is_null() ? 1 : res[0][0].as<int>() + 1;
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txn.parameterized
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("insert into BuildSteps (build, stepnr, type, drvPath, busy, startTime, system, status, propagatedFrom, errorMsg, stopTime, machine) values ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)")
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(build->id)(stepNr)(0)(step->drvPath)(status == bssBusy ? 1 : 0)
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(startTime, startTime != 0)
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(step->drv.platform)
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((int) status, status != bssBusy)
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(propagatedFrom, propagatedFrom != 0)
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(errorMsg, errorMsg != "")
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(startTime, startTime != 0 && status != bssBusy)
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(machine).exec();
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for (auto & output : step->drv.outputs)
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txn.parameterized
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("insert into BuildStepOutputs (build, stepnr, name, path) values ($1, $2, $3, $4)")
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(build->id)(stepNr)(output.first)(output.second.path).exec();
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return stepNr;
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}
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void State::finishBuildStep(pqxx::work & txn, time_t startTime, time_t stopTime, BuildID buildId, int stepNr,
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const std::string & machine, BuildStepStatus status, const std::string & errorMsg, BuildID propagatedFrom)
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{
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assert(startTime);
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assert(stopTime);
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txn.parameterized
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("update BuildSteps set busy = 0, status = $1, propagatedFrom = $4, errorMsg = $5, startTime = $6, stopTime = $7, machine = $8 where build = $2 and stepnr = $3")
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((int) status)(buildId)(stepNr)
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(propagatedFrom, propagatedFrom != 0)
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(errorMsg, errorMsg != "")
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(startTime)(stopTime)
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(machine, machine != "").exec();
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}
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/* Get the steps and unfinished builds that depend on the given step. */
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void getDependents(Step::ptr step, std::set<Build::ptr> & builds, std::set<Step::ptr> & steps)
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{
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std::function<void(Step::ptr)> visit;
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visit = [&](Step::ptr step) {
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if (has(steps, step)) return;
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steps.insert(step);
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std::vector<Step::wptr> rdeps;
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{
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auto step_(step->state.lock());
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for (auto & build : step_->builds) {
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auto build_ = build.lock();
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if (build_ && !build_->finishedInDB) builds.insert(build_);
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}
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/* Make a copy of rdeps so that we don't hold the lock for
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very long. */
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rdeps = step_->rdeps;
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}
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for (auto & rdep : rdeps) {
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auto rdep_ = rdep.lock();
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if (rdep_) visit(rdep_);
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}
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};
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visit(step);
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}
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void visitDependencies(std::function<void(Step::ptr)> visitor, Step::ptr start)
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{
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std::set<Step::ptr> queued;
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std::queue<Step::ptr> todo;
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todo.push(start);
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while (!todo.empty()) {
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auto step = todo.front();
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todo.pop();
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visitor(step);
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auto state(step->state.lock());
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for (auto & dep : state->deps)
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if (queued.find(dep) == queued.end()) {
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queued.insert(dep);
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todo.push(dep);
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}
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}
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}
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void State::markSucceededBuild(pqxx::work & txn, Build::ptr build,
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const BuildOutput & res, bool isCachedBuild, time_t startTime, time_t stopTime)
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{
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printMsg(lvlInfo, format("marking build %1% as succeeded") % build->id);
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if (build->finishedInDB) return;
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if (txn.parameterized("select 1 from Builds where id = $1 and finished = 0")(build->id).exec().empty()) return;
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txn.parameterized
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("update Builds set finished = 1, busy = 0, buildStatus = $2, startTime = $3, stopTime = $4, size = $5, closureSize = $6, releaseName = $7, isCachedBuild = $8 where id = $1")
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(build->id)
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((int) (res.failed ? bsFailedWithOutput : bsSuccess))
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(startTime)
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(stopTime)
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(res.size)
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(res.closureSize)
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(res.releaseName, res.releaseName != "")
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(isCachedBuild ? 1 : 0).exec();
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txn.parameterized("delete from BuildProducts where build = $1")(build->id).exec();
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unsigned int productNr = 1;
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for (auto & product : res.products) {
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txn.parameterized
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("insert into BuildProducts (build, productnr, type, subtype, fileSize, sha1hash, sha256hash, path, name, defaultPath) values ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)")
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(build->id)
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(productNr++)
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(product.type)
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(product.subtype)
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(product.fileSize, product.isRegular)
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(printHash(product.sha1hash), product.isRegular)
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(printHash(product.sha256hash), product.isRegular)
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(product.path)
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(product.name)
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(product.defaultPath).exec();
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}
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txn.parameterized("delete from BuildMetrics where build = $1")(build->id).exec();
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for (auto & metric : res.metrics) {
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txn.parameterized
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("insert into BuildMetrics (build, name, unit, value, project, jobset, job, timestamp) values ($1, $2, $3, $4, $5, $6, $7, $8)")
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(build->id)
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(metric.second.name)
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(metric.second.unit, metric.second.unit != "")
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(metric.second.value)
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(build->projectName)
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(build->jobsetName)
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(build->jobName)
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(build->timestamp).exec();
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}
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nrBuildsDone++;
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}
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bool State::checkCachedFailure(Step::ptr step, Connection & conn)
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{
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pqxx::work txn(conn);
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for (auto & path : outputPaths(step->drv))
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if (!txn.parameterized("select 1 from FailedPaths where path = $1")(path).exec().empty())
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return true;
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return false;
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}
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void State::logCompressor()
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{
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while (true) {
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try {
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Path logPath;
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{
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auto logCompressorQueue_(logCompressorQueue.lock());
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while (logCompressorQueue_->empty())
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logCompressorQueue_.wait(logCompressorWakeup);
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logPath = logCompressorQueue_->front();
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logCompressorQueue_->pop();
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}
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if (!pathExists(logPath)) continue;
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printMsg(lvlChatty, format("compressing log file ‘%1%’") % logPath);
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Path tmpPath = logPath + ".bz2.tmp";
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AutoCloseFD fd = open(tmpPath.c_str(), O_CREAT | O_TRUNC | O_WRONLY, 0644);
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// FIXME: use libbz2
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Pid pid = startProcess([&]() {
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if (dup2(fd, STDOUT_FILENO) == -1)
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throw SysError("cannot dup output pipe to stdout");
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execlp("bzip2", "bzip2", "-c", logPath.c_str(), nullptr);
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throw SysError("cannot start bzip2");
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});
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int res = pid.wait(true);
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if (res != 0)
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throw Error(format("bzip2 returned exit code %1% while compressing ‘%2%’")
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% res % logPath);
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if (rename(tmpPath.c_str(), (logPath + ".bz2").c_str()) != 0)
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throw SysError(format("renaming ‘%1%’") % tmpPath);
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if (unlink(logPath.c_str()) != 0)
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throw SysError(format("unlinking ‘%1%’") % logPath);
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} catch (std::exception & e) {
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printMsg(lvlError, format("log compressor: %1%") % e.what());
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sleep(5);
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}
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}
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}
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void State::notificationSender()
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{
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while (true) {
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try {
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NotificationItem item;
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{
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auto notificationSenderQueue_(notificationSenderQueue.lock());
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while (notificationSenderQueue_->empty())
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notificationSenderQueue_.wait(notificationSenderWakeup);
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item = notificationSenderQueue_->front();
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notificationSenderQueue_->pop();
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}
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printMsg(lvlChatty, format("sending notification about build %1%") % item.first);
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Pid pid = startProcess([&]() {
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Strings argv({"hydra-notify", "build", int2String(item.first)});
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for (auto id : item.second)
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argv.push_back(int2String(id));
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execvp("hydra-notify", (char * *) stringsToCharPtrs(argv).data()); // FIXME: remove cast
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throw SysError("cannot start hydra-notify");
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});
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int res = pid.wait(true);
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if (res != 0)
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throw Error(format("hydra-build returned exit code %1% notifying about build %2%")
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% res % item.first);
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} catch (std::exception & e) {
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printMsg(lvlError, format("notification sender: %1%") % e.what());
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sleep(5);
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}
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}
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}
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std::shared_ptr<PathLocks> State::acquireGlobalLock()
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{
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Path lockPath = hydraData + "/queue-runner/lock";
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createDirs(dirOf(lockPath));
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auto lock = std::make_shared<PathLocks>();
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if (!lock->lockPaths(PathSet({lockPath}), "", false)) return 0;
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return lock;
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}
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void State::dumpStatus(Connection & conn, bool log)
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{
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std::ostringstream out;
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{
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JSONObject root(out);
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time_t now = time(0);
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root.attr("status", "up");
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root.attr("time", time(0));
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root.attr("uptime", now - startedAt);
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root.attr("pid", getpid());
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{
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auto builds_(builds.lock());
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root.attr("nrQueuedBuilds", builds_->size());
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}
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{
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auto steps_(steps.lock());
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for (auto i = steps_->begin(); i != steps_->end(); )
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if (i->second.lock()) ++i; else i = steps_->erase(i);
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root.attr("nrUnfinishedSteps", steps_->size());
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}
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{
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auto runnable_(runnable.lock());
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for (auto i = runnable_->begin(); i != runnable_->end(); )
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if (i->lock()) ++i; else i = runnable_->erase(i);
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root.attr("nrRunnableSteps", runnable_->size());
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}
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root.attr("nrActiveSteps", nrActiveSteps);
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root.attr("nrStepsBuilding", nrStepsBuilding);
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root.attr("nrStepsCopyingTo", nrStepsCopyingTo);
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root.attr("nrStepsCopyingFrom", nrStepsCopyingFrom);
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root.attr("nrStepsWaiting", nrStepsWaiting);
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root.attr("bytesSent"); out << bytesSent;
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root.attr("bytesReceived"); out << bytesReceived;
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root.attr("nrBuildsRead", nrBuildsRead);
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root.attr("nrBuildsDone", nrBuildsDone);
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root.attr("nrStepsDone", nrStepsDone);
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root.attr("nrRetries", nrRetries);
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root.attr("maxNrRetries", maxNrRetries);
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if (nrStepsDone) {
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root.attr("totalStepTime", totalStepTime);
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root.attr("totalStepBuildTime", totalStepBuildTime);
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root.attr("avgStepTime"); out << (float) totalStepTime / nrStepsDone;
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root.attr("avgStepBuildTime"); out << (float) totalStepBuildTime / nrStepsDone;
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}
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root.attr("nrQueueWakeups", nrQueueWakeups);
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root.attr("nrDispatcherWakeups", nrDispatcherWakeups);
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root.attr("nrDbConnections", dbPool.count());
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{
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root.attr("machines");
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JSONObject nested(out);
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auto machines_(machines.lock());
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for (auto & i : *machines_) {
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auto & m(i.second);
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auto & s(m->state);
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nested.attr(m->sshName);
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JSONObject nested2(out);
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nested2.attr("currentJobs", s->currentJobs);
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if (s->currentJobs == 0)
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nested2.attr("idleSince", s->idleSince);
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nested2.attr("nrStepsDone", s->nrStepsDone);
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if (m->state->nrStepsDone) {
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nested2.attr("totalStepTime", s->totalStepTime);
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nested2.attr("totalStepBuildTime", s->totalStepBuildTime);
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nested2.attr("avgStepTime"); out << (float) s->totalStepTime / s->nrStepsDone;
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nested2.attr("avgStepBuildTime"); out << (float) s->totalStepBuildTime / s->nrStepsDone;
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}
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}
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}
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{
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root.attr("jobsets");
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JSONObject nested(out);
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auto jobsets_(jobsets.lock());
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for (auto & jobset : *jobsets_) {
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nested.attr(jobset.first.first + ":" + jobset.first.second);
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JSONObject nested2(out);
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nested2.attr("shareUsed"); out << jobset.second->shareUsed();
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nested2.attr("seconds", jobset.second->getSeconds());
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}
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}
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{
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root.attr("machineTypes");
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JSONObject nested(out);
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auto machineTypes_(machineTypes.lock());
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for (auto & i : *machineTypes_) {
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nested.attr(i.first);
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JSONObject nested2(out);
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nested2.attr("runnable", i.second.runnable);
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nested2.attr("running", i.second.running);
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if (i.second.runnable > 0)
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nested2.attr("waitTime", i.second.waitTime.count() +
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i.second.runnable * (time(0) - lastDispatcherCheck));
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if (i.second.running == 0)
|
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nested2.attr("lastActive", std::chrono::system_clock::to_time_t(i.second.lastActive));
|
||
}
|
||
}
|
||
}
|
||
|
||
if (log) printMsg(lvlInfo, format("status: %1%") % out.str());
|
||
|
||
{
|
||
pqxx::work txn(conn);
|
||
// FIXME: use PostgreSQL 9.5 upsert.
|
||
txn.exec("delete from SystemStatus where what = 'queue-runner'");
|
||
txn.parameterized("insert into SystemStatus values ('queue-runner', $1)")(out.str()).exec();
|
||
txn.exec("notify status_dumped");
|
||
txn.commit();
|
||
}
|
||
}
|
||
|
||
|
||
void State::showStatus()
|
||
{
|
||
auto conn(dbPool.get());
|
||
receiver statusDumped(*conn, "status_dumped");
|
||
|
||
string status;
|
||
bool barf = false;
|
||
|
||
/* Get the last JSON status dump from the database. */
|
||
{
|
||
pqxx::work txn(*conn);
|
||
auto res = txn.exec("select status from SystemStatus where what = 'queue-runner'");
|
||
if (res.size()) status = res[0][0].as<string>();
|
||
}
|
||
|
||
if (status != "") {
|
||
|
||
/* If the status is not empty, then the queue runner is
|
||
running. Ask it to update the status dump. */
|
||
{
|
||
pqxx::work txn(*conn);
|
||
txn.exec("notify dump_status");
|
||
txn.commit();
|
||
}
|
||
|
||
/* Wait until it has done so. */
|
||
barf = conn->await_notification(5, 0) == 0;
|
||
|
||
/* Get the new status. */
|
||
{
|
||
pqxx::work txn(*conn);
|
||
auto res = txn.exec("select status from SystemStatus where what = 'queue-runner'");
|
||
if (res.size()) status = res[0][0].as<string>();
|
||
}
|
||
|
||
}
|
||
|
||
if (status == "") status = R"({"status":"down"})";
|
||
|
||
std::cout << status << "\n";
|
||
|
||
if (barf)
|
||
throw Error("queue runner did not respond; status information may be wrong");
|
||
}
|
||
|
||
|
||
void State::unlock()
|
||
{
|
||
auto lock = acquireGlobalLock();
|
||
if (!lock)
|
||
throw Error("hydra-queue-runner is currently running");
|
||
|
||
auto conn(dbPool.get());
|
||
|
||
clearBusy(*conn, 0);
|
||
|
||
{
|
||
pqxx::work txn(*conn);
|
||
txn.exec("delete from SystemStatus where what = 'queue-runner'");
|
||
txn.commit();
|
||
}
|
||
}
|
||
|
||
|
||
void State::run(BuildID buildOne)
|
||
{
|
||
startedAt = time(0);
|
||
this->buildOne = buildOne;
|
||
|
||
auto lock = acquireGlobalLock();
|
||
if (!lock)
|
||
throw Error("hydra-queue-runner is already running");
|
||
|
||
{
|
||
auto conn(dbPool.get());
|
||
clearBusy(*conn, 0);
|
||
dumpStatus(*conn, false);
|
||
}
|
||
|
||
loadMachinesFile();
|
||
|
||
std::thread(&State::monitorMachinesFile, this).detach();
|
||
|
||
std::thread(&State::queueMonitor, this).detach();
|
||
|
||
std::thread(&State::dispatcher, this).detach();
|
||
|
||
/* Run a log compressor thread. If needed, we could start more
|
||
than one. */
|
||
std::thread(&State::logCompressor, this).detach();
|
||
|
||
/* Idem for notification sending. */
|
||
std::thread(&State::notificationSender, this).detach();
|
||
|
||
/* Monitor the database for status dump requests (e.g. from
|
||
‘hydra-queue-runner --status’). */
|
||
while (true) {
|
||
try {
|
||
auto conn(dbPool.get());
|
||
receiver dumpStatus(*conn, "dump_status");
|
||
while (true) {
|
||
bool timeout = conn->await_notification(300, 0) == 0;
|
||
State::dumpStatus(*conn, timeout);
|
||
}
|
||
} catch (std::exception & e) {
|
||
printMsg(lvlError, format("main thread: %1%") % e.what());
|
||
sleep(10); // probably a DB problem, so don't retry right away
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
int main(int argc, char * * argv)
|
||
{
|
||
return handleExceptions(argv[0], [&]() {
|
||
initNix();
|
||
|
||
signal(SIGINT, SIG_DFL);
|
||
signal(SIGTERM, SIG_DFL);
|
||
signal(SIGHUP, SIG_DFL);
|
||
|
||
bool unlock = false;
|
||
bool status = false;
|
||
BuildID buildOne = 0;
|
||
|
||
parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
|
||
if (*arg == "--unlock")
|
||
unlock = true;
|
||
else if (*arg == "--status")
|
||
status = true;
|
||
else if (*arg == "--build-one") {
|
||
if (!string2Int<BuildID>(getArg(*arg, arg, end), buildOne))
|
||
throw Error("‘--build-one’ requires a build ID");
|
||
} else
|
||
return false;
|
||
return true;
|
||
});
|
||
|
||
settings.buildVerbosity = lvlVomit;
|
||
settings.useSubstitutes = false;
|
||
settings.lockCPU = false;
|
||
|
||
State state;
|
||
if (status)
|
||
state.showStatus();
|
||
else if (unlock)
|
||
state.unlock();
|
||
else
|
||
state.run(buildOne);
|
||
});
|
||
}
|