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/**
* Copyright 2013-2022 the PM2 project authors. All rights reserved.
* Use of this source code is governed by a license that
* can be found in the LICENSE file.
*/
'use strict';
/**
* @file Reload functions related
* @author Alexandre Strzelewicz <as@unitech.io>
* @project PM2
*/
var cst = require('../../constants.js');
var Utility = require('../Utility.js');
/**
* softReload will wait permission from process to exit
* @method softReload
* @param {} God
* @param {} id
* @param {} cb
* @return Literal
*/
function softReload(God, id, cb) {
var t_key = '_old_' + id;
// Move old worker to tmp id
God.clusters_db[t_key] = God.clusters_db[id];
delete God.clusters_db[id];
var old_worker = God.clusters_db[t_key];
// Deep copy
var new_env = Utility.clone(old_worker.pm2_env);
// Reset created_at and unstable_restarts
God.resetState(new_env);
new_env.restart_time += 1;
old_worker.pm2_env.pm_id = t_key;
old_worker.pm_id = t_key;
God.executeApp(new_env, function(err, new_worker) {
if (err) return cb(err);
var timer = null;
var onListen = function () {
clearTimeout(timer);
softCleanDeleteProcess();
console.log('-softReload- New worker listening');
};
// Bind to know when the new process is up
new_worker.once('listening', onListen);
timer = setTimeout(function() {
new_worker.removeListener('listening', onListen);
softCleanDeleteProcess();
}, new_env.listen_timeout || cst.GRACEFUL_LISTEN_TIMEOUT);
// Remove old worker properly
var softCleanDeleteProcess = function () {
var cleanUp = function () {
clearTimeout(timer);
console.log('-softReload- Old worker disconnected');
return God.deleteProcessId(t_key, cb);
};
old_worker.once('disconnect', cleanUp);
try {
if (old_worker.state != 'dead' && old_worker.state != 'disconnected')
old_worker.send && old_worker.send('shutdown');
else {
clearTimeout(timer);
console.error('Worker %d is already disconnected', old_worker.pm2_env.pm_id);
return God.deleteProcessId(t_key, cb);
}
} catch(e) {
clearTimeout(timer);
console.error('Worker %d is already disconnected', old_worker.pm2_env.pm_id);
return God.deleteProcessId(t_key, cb);
}
timer = setTimeout(function () {
old_worker.removeListener('disconnect', cleanUp);
return God.deleteProcessId(t_key, cb);
}, cst.GRACEFUL_TIMEOUT);
return false;
};
return false;
});
return false;
};
/**
* hardReload will reload without waiting permission from process
* @method hardReload
* @param {} God
* @param {} id
* @param {} cb
* @return Literal
*/
function hardReload(God, id, wait_msg, cb) {
var t_key = '_old_' + id;
// Move old worker to tmp id
God.clusters_db[t_key] = God.clusters_db[id];
delete God.clusters_db[id];
var old_worker = God.clusters_db[t_key];
// Deep copy
var new_env = Utility.clone(old_worker.pm2_env);
new_env.restart_time += 1;
// Reset created_at and unstable_restarts
God.resetState(new_env);
old_worker.pm2_env.pm_id = t_key;
old_worker.pm_id = t_key;
var timer = null;
var readySignalSent = false;
var onListen = function () {
clearTimeout(timer);
readySignalSent = true;
console.log('-reload- New worker listening');
return God.deleteProcessId(t_key, cb);
};
var listener = function (packet) {
if (packet.raw === 'ready' &&
packet.process.name === old_worker.pm2_env.name &&
packet.process.pm_id === id) {
God.bus.removeListener('process:msg', listener);
return onListen();
}
};
if (wait_msg !== 'listening') {
God.bus.on('process:msg', listener);
}
God.executeApp(new_env, function(err, new_worker) {
if (err) return cb(err);
// Bind to know when the new process is up
if (wait_msg === 'listening') {
new_worker.once('listening', onListen);
}
timer = setTimeout(function() {
if (readySignalSent) {
return;
}
if (wait_msg === 'listening')
new_worker.removeListener(wait_msg, onListen);
else
God.bus.removeListener('process:msg', listener);
return God.deleteProcessId(t_key, cb);
}, new_env.listen_timeout || cst.GRACEFUL_LISTEN_TIMEOUT);
return false;
});
return false;
};
/**
* Description
* @method exports
* @param {} God
* @return
*/
module.exports = function(God) {
/**
* Reload
* @method softReloadProcessId
* @param {} id
* @param {} cb
* @return CallExpression
*/
God.softReloadProcessId = function(opts, cb) {
var id = opts.id;
var env = opts.env || {};
if (!(id in God.clusters_db))
return cb(new Error(`pm_id ${id} not available in ${id}`));
if (God.clusters_db[id].pm2_env.status == cst.ONLINE_STATUS &&
God.clusters_db[id].pm2_env.exec_mode == 'cluster_mode' &&
!God.clusters_db[id].pm2_env.wait_ready) {
Utility.extend(God.clusters_db[id].pm2_env.env, opts.env);
Utility.extendExtraConfig(God.clusters_db[id], opts);
return softReload(God, id, cb);
}
else {
console.log('Process %s in a stopped status, starting it', id);
return God.restartProcessId(opts, cb);
}
};
/**
* Reload
* @method reloadProcessId
* @param {} id
* @param {} cb
* @return CallExpression
*/
God.reloadProcessId = function(opts, cb) {
var id = opts.id;
var env = opts.env || {};
if (!(id in God.clusters_db))
return cb(new Error('PM2 ID unknown'));
if (God.clusters_db[id].pm2_env.status == cst.ONLINE_STATUS &&
God.clusters_db[id].pm2_env.exec_mode == 'cluster_mode') {
Utility.extend(God.clusters_db[id].pm2_env.env, opts.env);
Utility.extendExtraConfig(God.clusters_db[id], opts);
var wait_msg = God.clusters_db[id].pm2_env.wait_ready ? 'ready' : 'listening';
return hardReload(God, id, wait_msg, cb);
}
else {
console.log('Process %s in a stopped status, starting it', id);
return God.restartProcessId(opts, cb);
}
};
};
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