Using pm2 with rabbitmq nodejs - node.js

Question

I need to setup a nodejs cluster that uses pm2 to manage.
For communicating and passing message between the workers I am using rabbitmq.
I have gone through many articles but having some confusion basically regarding the flow.
These are the requirements:
When a order is created also create a booking for ordered services. Here I am thinking to pass the creation of booking to the worker process.
When a booking is created notify user and the devliery body also the admin.
This is what picture I have in my head for now.
I will start a node js cluster using pm2 as below.
// ecosystem.js
{
"apps" : [{
"name" : "API",
"script" : "server.js",// name of the startup file
"instances" : 4, // number of workers you want to run
"exec_mode" : "cluster", // to turn on cluster mode; defaults to 'fork' mode
"env": {
"PORT" : "9090" // the port on which the app should listen
}
}]
}
This is will start 4 workers.
Now How would I pass any task to these workers through rabbitmq?
Or should I another to workers for each task like.
NotificationWorker and BookingCreationWorker.
These two workers will wait for any task in their queue and process it?

Answer 1

i'll suggest you add a worker for BookingCreationWorker task and a consumer for NotificationWorker.js
{
apps: [
{
name: 'API',
script: 'server.js',
instances: 2,
watch: true,
exec_mode: "cluster",
max_memory_restart: '1G',
"env": {
"PORT" : "9090"
}
},
{
name: 'CreateBookWorker',
watch: true,
script: 'worker/BookingCreationWorker.js',
instances: 2
}
]
};