How to connect two droplets running the same Node.js app to a single MongoDB droplet

Posted October 18, 2017 2.1k views
MongoDBNode.jsUbuntu 16.04

I want to be able to have 2 node.js droplets behind a load balancer and have them both connect to the same MongoDB droplet/database. I want to have it so users will not notice if they are on droplet A or droplet B. How would I set this up/ put it in node.js code? I have this as my mongodb connect:


I know I would need to change localhost to the droplet IP but other than that is there any setup I need to do or custom code?

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Yes indeed, you would have to change the localhost part in your connection string to the IP address of your MongoDB droplet.

Also, you need to make sure that the two node droplets can communicate with the MongoDB instance by whitelisting your droplet IPs via the firewall on the MongoDB droplet.