snippets > activate-replicaset-mode-in-mongodb

July 31, 2020

Activate the replicaset mode in MongoDB

Start the MongoDB deamon with the --replSet flag.

mongod --replSet rs0

After first start, initialize the replica set with the following:

mongo <mongo_host>/<database> --eval "rs.initiate({_id: 'rs0', members: [ { _id: 0, host: '<mongo_host>:27017' } ]})"