Skip to content
Permalink
master
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
// Copyright IBM Corp. 2015,2017. All Rights Reserved.
// Node module: strong-nginx-controller
// US Government Users Restricted Rights - Use, duplication or disclosure
// restricted by GSA ADP Schedule Contract with IBM Corp.
/* eslint no-console:0 */
'use strict';
var Nginx = require('./nginx');
var WebsocketChannel = require('strong-control-channel/ws-channel');
var async = require('async');
var boot = require('loopback-boot');
var debug = require('debug')('strong-nginx-controller:server');
var loopback = require('loopback');
var url = require('url');
var path = require('path');
/**
* Create and configure the Gateway controller app
* @method setup
* @param {object} options Options object
* @param {String} options.baseDir Base directory
* @param {String} options.apiEndpoint URL for where API should be listening
* @param {String} options.nginxPath Path to Nginx executable
* @param {String} options.routableEndpoint URL for where Nginx should be
* listening for Service requests.
* @param {String} options.nginxRoot Base directory for Nginx conf/html files.
* @param {String} options.controlUri Web socket URL to connect to Central.
* @param {Class} options.Nginx Injected Nginx class for testing
* @return {[type]} [description]
*/
function setup(options) {
var app = loopback();
options.app = app;
var _Nginx = options.Nginx || Nginx;
app._nginx = new _Nginx(options);
app._disableApi = true;
app._enableExplorer = debug.enabled;
app._controlUri = options.controlUri;
app._Channel = options.Channel || WebsocketChannel;
// Set the IP and port that server should listen on
if (options.apiEndpoint) {
var apiEndpoint = url.parse(options.apiEndpoint);
app.set('host', apiEndpoint.hostname);
app.set('port', apiEndpoint.port);
app._disableApi = false;
}
app.use(loopback.favicon());
app.use(loopback.compress());
app.dataSource('db', {
name: 'db',
connector: 'memory',
file: path.join(options.baseDir, 'routes.json'),
});
boot(app, __dirname);
app.use(loopback.urlNotFound());
app.use(loopback.errorHandler());
app.start = function start(callback) {
var self = this;
var tasks = [];
if (!self._disableApi) {
tasks.push(function(callback) {
app._server = app.listen(function() {
self._apiAddress = this.address();
debug('API listening on: ', self._apiAddress);
callback();
});
});
}
tasks.push(self._nginx.start.bind(self._nginx));
if (self._controlUri) {
tasks.push(self._initControlChannel.bind(self));
}
tasks.push(function(callback) {
if (self._apiAddress) self.emit('listening', self._apiAddress);
self.emit('started');
callback();
});
async.series(tasks, function(err) {
if (err) {
if (callback) return callback(err);
throw err;
}
if (callback) callback();
});
};
function stop(callback) {
var tasks = [];
tasks.push(this._nginx.stop.bind(this._nginx));
if (this._server)
tasks.push(this._server.close.bind(this._server));
async.series(tasks, callback);
}
app.stop = stop;
function reload(callback) {
this._nginx.reload(callback);
}
app.reload = reload;
function _initControlChannel(callback) {
var self = this;
this._channel = this._Channel.connect(
this._nginx.onRequest.bind(this._nginx),
this._controlUri
);
this._channel.on('connect', function() {
debug('start: connected');
self._channel.notify({
cmd: 'starting',
});
});
self._channel.on('error', function(err) {
debug('channel errored: %s', err.message);
console.log('Error communicating with Central server: %s', err.message);
self.stop();
});
setImmediate(callback);
}
app._initControlChannel = _initControlChannel;
function updateService(serviceId, endpoints, callback) {
var Config = app.models.Config;
var Endpoint = app.models.Endpoint;
Config.clean(serviceId, function saveEndpoints() {
async.eachSeries(
endpoints,
Endpoint.createEndpoint.bind(Endpoint),
function(err) {
if (err) return callback(err);
Endpoint.app.reload(callback);
}
);
});
}
app.updateService = updateService;
function syncEndpoints(serviceList, callback) {
var Config = app.models.Config;
var Endpoint = app.models.Endpoint;
var self = this;
Config.clean(null, function saveEndpoints() {
async.eachSeries(serviceList,
function(service, callback) {
self.updateService(service.serviceId, service.endpoints, callback);
}, function(err) {
if (err) return callback(err);
Endpoint.app.reload(callback);
}
);
});
}
app.syncEndpoints = syncEndpoints;
stopWhenDone(app);
return app;
}
function stopWhenDone(app) {
function dieBy(signal) {
console.log('stopped with %s', signal);
app.stop(function(err) {
if (err) {
debug('Error while exiting: ', err);
console.log('An error occurred while stopping. ' +
'There may be a stale nginx process.');
}
// re-kill ourself, so our exit status is signaled
process.kill(process.pid, signal);
});
}
function dieOn(signal) {
process.once(signal, dieBy.bind(null, signal));
}
dieOn('SIGINT');
dieOn('SIGTERM');
process.on('exit', function() {
app.stop();
});
process.once('SIGHUP', app.reload.bind(app));
}
module.exports = setup;