77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/*
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* Copyright (C) 2017 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "supervisor.hh"
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#include "log.hh"
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#include <seastar/core/print.hh>
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#include <csignal>
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#include <cstdlib>
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#ifdef HAVE_LIBSYSTEMD
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#include <systemd/sd-daemon.h>
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#endif
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extern logger startlog;
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const sstring supervisor::scylla_upstart_job_str("scylla-server");
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const sstring supervisor::upstart_job_env("UPSTART_JOB");
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const sstring supervisor::systemd_ready_msg("READY=1");
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const sstring supervisor::systemd_status_msg_prefix("STATUS");
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sstring supervisor::get_upstart_job_env() {
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const char* upstart_job = std::getenv(upstart_job_env.c_str());
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return !upstart_job ? "" : upstart_job;
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}
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bool supervisor::try_notify_upstart(sstring msg, bool ready) {
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static const sstring upstart_job_str(get_upstart_job_env());
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if (upstart_job_str != scylla_upstart_job_str) {
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return false;
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}
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if (ready) {
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std::raise(SIGSTOP);
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}
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return true;
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}
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void supervisor::try_notify_systemd(sstring msg, bool ready) {
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#ifdef HAVE_LIBSYSTEMD
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if (ready) {
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sd_notify(0, sprint("%s\n%s=%s\n", systemd_ready_msg, systemd_status_msg_prefix, msg).c_str());
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} else {
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sd_notify(0, sprint("%s=%s\n", systemd_status_msg_prefix, msg).c_str());
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}
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#endif
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}
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void supervisor::notify(sstring msg, bool ready) {
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startlog.trace("{}", msg);
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if (try_notify_upstart(msg, ready) == true) {
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return;
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} else {
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try_notify_systemd(msg, ready);
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}
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}
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