Multi-Node Setup for NATS

This document explains the steps to enable NATS in a Pulse for multi-node setup. This setup requires you to have at least three nodes in your cluster. One of the three nodes must be Pulse core node.

Pulse Core Node Configuration

This section describes the configurations to be performed in the Pulse core node.

1. Update the ad-core.yml file under the $AcceloHome/config/docker/ad-core.yml directory to use the nats-cluster-server.conf file in the volume section for ad-events.

ad-events:

  ... 

 volumes:

 - ./data/nats:/data/nats-server/jetstream

 - ./config/db/nats-cluster-server.conf:/config/jetstream-server.conf

2. Update the **nats-cluster-server.conf** file under $AcceloHome/config/db/nats-cluster-server.conf directory. You must add the IP addresses of the other two nodes in appropriate places (mentioned as n1 and n2).

debug: true

trace: false

server_name: S1

​

#each container can listen to client connections on port 19009

port: 4222

​

jetstream = {

  store_dir: "/data/nats-server/"

}

​

cluster = {

  name: "JSC"

  port: 6222

  listen: "0.0.0.0:6222"

​

  # Servers can connect to one another at

  # the following routes

  routes = [

    "nats://n1:19008" // # Replace with n1 IP address

    "nats://n2:19008" // # Replace with n2 IP address

  ]

​

}

​

#16MB as max allowed size for an event, default is 1MB

max_payload: 16777216

3. Execute the following code to deploy the ad-events container.

accelo deploy core