Question

How to set up bindIp for a replica set?

I am using the Ubuntu 18.04 MongoDB one click installation droplet. I have setup three droplets, and want to set up a replica set. I was trying to follow some tutorials:

here

[and here] (https://www.digitalocean.com/community/tutorials/how-to-implement-replication-sets-in-mongodb-on-an-ubuntu-vps)

I am stuck at setting a bindIp, and whenever I add the IP of my other droplets to bindIp, mongod won’t start, failing with this error:


Mar 31 15:52:01 db3.muhive.com systemd[1]: mongod.service: Main process exited, code=exited, status=48/n/a
Mar 31 15:52:01 db3.muhive.com systemd[1]: mongod.service: Failed with result 'exit-code'.

To be clear, this works:

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1

but this doesn’t

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1,db1.munhive.com,db2.munhive.com,db3.munhive.com

Pinging each of those individually does work though. How do I set this up? Do I need to configure a private network?


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Hi @deformercoding

We have documentation to configure remove access for mongodb, Please feel free to check it out:

https://www.digitalocean.com/community/tutorials/how-to-configure-remote-access-for-mongodb-on-ubuntu-20-04

In the /etc/mongod.conf file make changes to bindIP as below to three mongodb nodes when you are setting up replication.

In mongodb1 server

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1,mongodb1

In mongodb2 server

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1,mongodb2

In mongodb3 server

# network interfaces
net:
  port: 27017
  bindIp: 127.0.0.1,mongodb3

Once you made these changes, restart mongod service on all 3 nodes.

Always when you are binding to a non-localhost, please make sure to secure the database by enabling authentication.

https://www.digitalocean.com/community/tutorials/how-to-secure-mongodb-on-ubuntu-20-04

Hope this helps!

Regards, Rajkishore