Google Cloud Mongo DB: External IP not connecting

Question

I have created a ready to go MongoDB server on Google Cloud using the default parameters. Everything is working fine between them (there is communication and I can add DBs a

Answer 1

Did you

• configure the firewall rule in Google cloud console
• provide a tag in your firewall rule
• tag your instance with the same tag as the firewall rule

?

I explained how to open a port to the outside world in detail over here. Replace with your own port number.

Answer 2

I belive the issue here is that the ReplicaSetMonitorWatcher is changing hosts to rs0/mongo-db-jff3:27017, where mongo-db-jff3 is not reachable from your network. You need to configure the hosts in the replica set to something that you can reach (static IP or URL).

https://docs.mongodb.com/manual/tutorial/change-hostnames-in-a-replica-set/

Quick example, mongo into your PRIMARY (SECONDARY if you want to do it no downtime):

cfg = rs.conf()
cfg.members[0].host = "mongodb0.example.net:27017"
cfg.members[1].host = "mongodb1.example.net:27017"
rs.reconfig(cfg)