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PhabricatorDaemonControl.php
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Tue, Nov 26, 13:31

PhabricatorDaemonControl.php
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<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
final class PhabricatorDaemonControl {
public function executeListCommand() {
$symbols = $this->loadAvailableDaemonClasses();
$symbols = igroup($symbols, 'library');
echo "\n";
foreach ($symbols as $library => $symbol_list) {
echo phutil_console_format("Daemons in library __%s__:\n", $library);
foreach ($symbol_list as $symbol) {
echo " ".$symbol['name']."\n";
}
echo "\n";
}
return 0;
}
public function executeStatusCommand() {
$daemons = $this->loadRunningDaemons();
if (!$daemons) {
echo "There are no running Phabricator daemons.\n";
return 0;
}
printf(
"%-5s\t%-24s\t%s\n",
"PID",
"Started",
"Daemon");
foreach ($daemons as $daemon) {
$name = $daemon->getName();
if (!$daemon->isRunning()) {
$name = '<DEAD> '.$name;
if ($daemon->getPIDFile()) {
Filesystem::remove($daemon->getPIDFile());
}
}
printf(
"%5s\t%-24s\t%s\n",
$daemon->getPID(),
$daemon->getEpochStarted()
? date('M j Y, g:i:s A', $daemon->getEpochStarted())
: null,
$name);
}
return 0;
}
public function executeStopCommand($pids = null) {
$daemons = $this->loadRunningDaemons();
if (!$daemons) {
echo "There are no running Phabricator daemons.\n";
return 0;
}
$daemons = mpull($daemons, null, 'getPID');
$running = array();
if ($pids == null) {
$running = $daemons;
} else {
// We were given a PID or set of PIDs to kill.
foreach ($pids as $key => $pid) {
if (empty($daemons[$pid])) {
echo "{$pid} is not Phabricator-controlled. Not killing.\n";
continue;
} else {
$running[] = $daemons[$pid];
}
}
}
if (empty($running)) {
echo "No daemons to kill.\n";
return 0;
}
$killed = array();
foreach ($running as $key => $daemon) {
$pid = $daemon->getPID();
$name = $daemon->getName();
echo "Stopping daemon '{$name}' ({$pid})...\n";
if (!$daemon->isRunning()) {
echo "Daemon is not running.\n";
unset($running[$key]);
} else {
posix_kill($pid, SIGINT);
$killed[] = $daemon;
}
}
$start = time();
do {
foreach ($running as $key => $daemon) {
$pid = $daemon->getPID();
if (!$daemon->isRunning()) {
echo "Daemon {$pid} exited normally.\n";
unset($running[$key]);
}
}
if (empty($running)) {
break;
}
usleep(100000);
} while (time() < $start + 15);
foreach ($running as $key => $daemon) {
$pid = $daemon->getPID();
echo "KILLing daemon {$pid}.\n";
posix_kill($pid, SIGKILL);
$killed[] = $daemon;
}
foreach ($killed as $daemon) {
if ($daemon->getPIDFile()) {
Filesystem::remove($daemon->getPIDFile());
}
}
}
public function executeHelpCommand() {
echo phutil_console_format(<<<EOHELP
**NAME**
**phd** - phabricator daemon launcher
**COMMAND REFERENCE**
**launch** [__n__] __daemon__ [argv ...]
**debug** __daemon__ [argv ...]
Start a daemon (or n copies of a daemon).
With **debug**, do not daemonize. Use this if you're having trouble
getting daemons working.
**list**
List available daemons.
**status**
List running daemons.
**stop** [PID ...]
Stop all running daemons if no PIDs are given, or a particular
PID or set of PIDs, if they are supplied.
**help**
Show this help.
**repository-launch-master**
Launches daemons to update and parse all tracked repositories. You
must also launch Taskmaster daemons, either on the same machine or
elsewhere. You should launch a master only one machine. For other
machines, launch a 'readonly'.
**repository-launch-readonly**
Launches daemons to 'git pull' tracked git repositories so they
stay up to date.
EOHELP
);
return 1;
}
public function pingConduit() {
// It's fairly common to have issues here, e.g. because Phabricator isn't
// running, isn't accessible, you put the domain in your hostsfile but it
// isn't available on the production host, etc. If any of this doesn't work,
// conduit will throw.
// We do this here rather than in the daemon since there's an HTTPS + curl
// + fork issue of some kind that makes
$conduit = new ConduitClient(PhabricatorEnv::getURI('/api/'));
$conduit->setTimeout(5);
$conduit->callMethodSynchronous('conduit.ping', array());
}
public function launchDaemon($daemon, array $argv, $debug = false) {
$symbols = $this->loadAvailableDaemonClasses();
$symbols = ipull($symbols, 'name', 'name');
if (empty($symbols[$daemon])) {
throw new Exception("Daemon '{$daemon}' is not known.");
}
$pid_dir = $this->getControlDirectory('pid');
$log_dir = $this->getControlDirectory('log').'/daemons.log';
$libphutil_root = dirname(phutil_get_library_root('phutil'));
$launch_daemon = $libphutil_root.'/scripts/daemon/';
// TODO: This should be a much better user experience.
Filesystem::assertExists($pid_dir);
Filesystem::assertIsDirectory($pid_dir);
Filesystem::assertWritable($pid_dir);
foreach ($argv as $key => $arg) {
$argv[$key] = escapeshellarg($arg);
}
$bootloader = PhutilBootloader::getInstance();
$all_libraries = $bootloader->getAllLibraries();
$non_default_libraries = array_diff(
$all_libraries,
array('phutil', 'phabricator'));
$extra_libraries = array();
foreach ($non_default_libraries as $library) {
$extra_libraries[] = csprintf(
'--load-phutil-library=%s',
phutil_get_library_root($library));
}
$command = csprintf(
"./launch_daemon.php ".
"%s ".
"--load-phutil-library=%s ".
"%C ".
"--conduit-uri=%s ".
"--phd=%s ".
($debug ? '--trace ' : '--daemonize '),
$daemon,
phutil_get_library_root('phabricator'),
implode(' ', $extra_libraries),
PhabricatorEnv::getURI('/api/'),
$pid_dir);
if (!$debug) {
// If we're running "phd debug", send output straight to the console
// instead of to a logfile.
$command = csprintf("%C --log=%s", $command, $log_dir);
}
// Append the daemon's argv.
$command = csprintf("%C %C", $command, implode(' ', $argv));
if ($debug) {
// Don't terminate when the user sends ^C; it will be sent to the
// subprocess which will terminate normally.
pcntl_signal(
SIGINT,
array('PhabricatorDaemonControl', 'ignoreSignal'));
echo "\n libphutil/scripts/daemon/ \$ {$command}\n\n";
phutil_passthru('(cd %s && exec %C)', $launch_daemon, $command);
} else {
$future = new ExecFuture('exec %C', $command);
// Play games to keep 'ps' looking reasonable.
$future->setCWD($launch_daemon);
$future->resolvex();
}
}
public static function ignoreSignal($signo) {
return;
}
public function getControlDirectory($dir) {
$path = PhabricatorEnv::getEnvConfig('phd.pid-directory').'/'.$dir;
if (!Filesystem::pathExists($path)) {
list($err) = exec_manual('mkdir -p %s', $path);
if ($err) {
throw new Exception(
"phd requires the directory '{$path}' to exist, but it does not ".
"exist and could not be created. Create this directory or update ".
"'phd.pid-directory' in your configuration to point to an existing ".
"directory.");
}
}
return $path;
}
protected function loadAvailableDaemonClasses() {
$loader = new PhutilSymbolLoader();
return $loader
->setAncestorClass('PhutilDaemon')
->selectSymbolsWithoutLoading();
}
protected function loadRunningDaemons() {
$results = array();
$pid_dir = $this->getControlDirectory('pid');
$pid_files = Filesystem::listDirectory($pid_dir);
if (!$pid_files) {
return $results;
}
foreach ($pid_files as $pid_file) {
$pid_data = Filesystem::readFile($pid_dir.'/'.$pid_file);
$dict = json_decode($pid_data, true);
if (!is_array($dict)) {
// Just return a hanging reference, since control code needs to be
// robust against unusual system states.
$dict = array();
}
$ref = PhabricatorDaemonReference::newFromDictionary($dict);
$ref->setPIDFile($pid_dir.'/'.$pid_file);
$results[] = $ref;
}
return $results;
}
protected function killDaemon(PhabricatorDaemonReference $ref) {
}
}

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