Question: Do I need one Instances for each App?

[SaifAlDilaimi]

Hello Parse-Team ;(

I was in technical mourning the whole day in my bed and since its 10pm here I thought I should stop wining. Thaanks first of that you guys decided to still support the open source stuff. Could have been worst...

Well to my question: Do I need for each app from now on a single parse-server instance? I have apps that depend on parse but have not that much of traction to get their own server. I'm I right that I need multple instances??

PS: Couldn't you post it on a monday? Mondays sucks anyway..

[francocorreasosa]

Yes but you can do it very easily.

Example:

var express = require('express');
var ParseServer = require('parse-server').ParseServer;

var app = express();

// Specify the connection string for your mongodb database
// and the location to your Parse cloud code
var app1 = new ParseServer({
  databaseURI: 'mongodb://localhost:27017/app1',
  cloud: '/home/parse/example/cloudcode/main.js', // Provide an absolute path
  appId: 'gXQvHLskP1ej38OQ7CjIqgbRs01ZCMznbcxSm1B',
  masterKey: 'W8VquvQsd8ejded8jD1CKmKs1OqQINEgRa7NXDCYF'
});

var app2 = new ParseServer({
  databaseURI: 'mongodb://localhost:27017/app2',
  cloud: '/home/parse/example2/cloudcode/main.js', // Provide an absolute path
  appId: 'fndfHLskP1ef38OQdCjIqgbRs01ZCMznbcxde8',
  masterKey: 'mdfmQsd8djaed8jD1CKmKs1OqQINEgRa7NXFJDdf'
});


// Serve the Parse API on the /parse URL prefix
app.use('/app1/api', app1);
app.use('/app2/api', app2);

// Hello world
app.get('/app1', function(req, res) {
  res.status(200).send('Express is running here for app1.');
});

app.get('/app2', function(req, res) {
  res.status(200).send('Express is running here for app2.');
});

var port = process.env.PORT || 5000;
app.listen(port, function() {
  console.log('parse-server-example running on port ' + port + '.');
});

[francocorreasosa]

Or having different files and manage them with pm2 as I do

┌───────────────────┬────┬──────┬──────┬────────┬─────────┬────────┬─────────────┬──────────┐
│ App name          │ id │ mode │ pid  │ status │ restart │ uptime │ memory      │ watching │
├───────────────────┼────┼──────┼──────┼────────┼─────────┼────────┼─────────────┼──────────┤
│ mongod            │ 2  │ fork │ 5503 │ online │ 14      │ 57m    │ 31.230 MB   │ disabled │
│ app1-server       │ 3  │ fork │ 6286 │ online │ 1       │ 39m    │ 13.750 MB   │ disabled │
│ app2-server       │ 4  │ fork │ 6232 │ online │ 1       │ 38m    │ 11.359 MB   │ disabled │
└───────────────────┴────┴──────┴──────┴────────┴─────────┴────────┴─────────────┴──────────┘

[kingmatusevich]

Or run multiple docker containers in the same server host, and mapping the parse-server port to a different port per app, You've got plenty of ports to spare and it would be very safe, independent and scalable.

[gfosco]

Just to note that if they are in the same scope, what is not modularized is cloud code and Parse.initialize. If you're running multiple ParseServer instances, they will be writing over each others cloud code and appId/masterkey for client functions.

[SaifAlDilaimi]

mhh.. so this wasn't a criterium for parse-server.. It just would make sense for a server to support multiple apps.

@gfosco does it override also the keys and cloud code on the example of @francocorreasosa ?

[francocorreasosa]

What about this?

var express = require('express');
var ParseServerApp1, ParseServerApp2 = require('parse-server').ParseServer;


var app = express();

// Specify the connection string for your mongodb database
// and the location to your Parse cloud code
var app1 = new ParseServerApp1({
  databaseURI: 'mongodb://localhost:27017/app1',
  cloud: '/home/parse/example/cloudcode/main.js', // Provide an absolute path
  appId: 'gXQvHLskP1ej38OQ7CjIqgbRs01ZCMznbcxSm1B',
  masterKey: 'W8VquvQsd8ejded8jD1CKmKs1OqQINEgRa7NXDCYF'
});

var app2 = new ParseServerApp2({
  databaseURI: 'mongodb://localhost:27017/app2',
  cloud: '/home/parse/example2/cloudcode/main.js', // Provide an absolute path
  appId: 'fndfHLskP1ef38OQdCjIqgbRs01ZCMznbcxde8',
  masterKey: 'mdfmQsd8djaed8jD1CKmKs1OqQINEgRa7NXFJDdf'
});


// Serve the Parse API on the /parse URL prefix
app.use('/app1/api', app1);
app.use('/app2/api', app2);

// Hello world
app.get('/app1', function(req, res) {
  res.status(200).send('Express is running here for app1.');
});

app.get('/app2', function(req, res) {
  res.status(200).send('Express is running here for app2.');
});

var port = process.env.PORT || 5000;
app.listen(port, function() {
  console.log('parse-server-example running on port ' + port + '.');
});

The ParseServer "class" it's wrong implemented anyway. It should have a scope for each instance. Maybe fixing the class implementation helps.

[gfosco]

That wouldn't fix it because globals.Parse is mutated.

[SaifAlDilaimi]

So as far as I understood even the workaround of @francocorreasosa doesnt solve the problem?

[francocorreasosa]

Exactly. You have to run it on different processes and different internal ports. You can merge the ports into subdomains with a reverse proxy (nginx)

[asoyfer]

Running multiple docker containers as @kingmatusevich mentioned would also work but that assumes you want to learn all about that lol

Running multiple Parse-Server apps in one instance of express via vhost would obv be the best for small apps. @gfosco any chance, you guys would have the time to build that in or is it less than trivial?

Thanks

[misaghDroid]

Yes but you can do it very easily.

Example:

var express = require('express');
var ParseServer = require('parse-server').ParseServer;

var app = express();

// Specify the connection string for your mongodb database
// and the location to your Parse cloud code
var app1 = new ParseServer({
  databaseURI: 'mongodb://localhost:27017/app1',
  cloud: '/home/parse/example/cloudcode/main.js', // Provide an absolute path
  appId: 'gXQvHLskP1ej38OQ7CjIqgbRs01ZCMznbcxSm1B',
  masterKey: 'W8VquvQsd8ejded8jD1CKmKs1OqQINEgRa7NXDCYF'
});

var app2 = new ParseServer({
  databaseURI: 'mongodb://localhost:27017/app2',
  cloud: '/home/parse/example2/cloudcode/main.js', // Provide an absolute path
  appId: 'fndfHLskP1ef38OQdCjIqgbRs01ZCMznbcxde8',
  masterKey: 'mdfmQsd8djaed8jD1CKmKs1OqQINEgRa7NXFJDdf'
});


// Serve the Parse API on the /parse URL prefix
app.use('/app1/api', app1);
app.use('/app2/api', app2);

// Hello world
app.get('/app1', function(req, res) {
  res.status(200).send('Express is running here for app1.');
});

app.get('/app2', function(req, res) {
  res.status(200).send('Express is running here for app2.');
});

var port = process.env.PORT || 5000;
app.listen(port, function() {
  console.log('parse-server-example running on port ' + port + '.');
});

I have problem and the last db overwrite for all app? Do you have any idea about that?