Mongodb in Docker Compose

[sgiorgetti]

Hello guys,

Hope you are well.

Thanks @garrettjstevens for your nice presentation and the great docs (and not only docs) provided.

I have got a question for you, and also wanted to try out the "Discussions" section here ... bear with me.

You guys have decided to spin up 2 mongo instances in replicaset configuration. I understand - in a non-containerised deployment - the recommended minimal replicaset should comprise 3 mongo instances instead (1 primary, 1 secondary, 1 arbiter).
Is there any specific reason to go for the 2 instances instead of the 3? Is it perhaps a consequence of using a containerised environment (Docker)?

Thanks,
S