Best way to connect to Percona Server for MongoDB deployed via the official operator

MongoDB Percona Operator for MongoDB
1

Hi,

I’ve installed Percona Server for MongoDB using the official operator. I noticed that by default, a headless ClusterIP service is created that points to all MongoDB replicas.

I also saw that it’s possible to enable the creation of a service for each replica using the following configuration:

replsets:
  rs0:
    expose:
      enabled: true

My question is: what is the recommended way to connect to MongoDB and ensure a reliable connection?

Should I use a connection string like this, pointing to the headless service:

mongodb://username:password@mongodb-rs0:27017/?replicaSet=rs0

Or should I explicitly list all replicas, like this:

mongodb://username:password@mongodb-rs0-0:27017,mongodb-rs0-1:27017,mongodb-rs0-2:27017/?replicaSet=rs0

Which approach is considered best practice in a Kubernetes environment with Percona Server for MongoDB?

Thanks in advance for your advice!

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