Configuring a Shared Replica Set¶

Caution - cluster

In a cluster all servers must use the same database. Therefore you have to perform the following configuration steps on every member of the replica set separately.

Edit the MongoDB configuration file:
```
/opt/seal/etc/mongod.conf
```
Change the following line:
```
bindIp: 127.0.0.1
```
to:
```
bindIp: 0.0.0.0
```
Add the following lines:
```
replication:
  oplogSizeMB: 2048
  replSetName: <YourReplicaSetName>
```
Hint - oplogSizeMB

We recommend setting oplogSizeMB to 5 % of the disk space available for MongoDB.
Restart MongoDB:
```
sudo systemctl restart mongod
```

Proceed with initializing MongoDB on the replica set primary as soon as all members of the replica set are configured.