RocketChat upgrade from 0.X.X to 1.3.2 version

https://rocket.chat/docs/installation/manual-installation/mongo-replicas/
add replica to config file /etc/mongodb.conf
replication:

  replSetName: "rs01"

systemctl restart mongod

mongo > 

rs.initiate()

Note “ok” value should be 1 in result output

Add this to the Environment line:
export MONGO_OPLOG_URL=mongodb://localhost:27017/local?replSet=rs01
to /etc/init.d/rocketchat in my case

Reload systemd state and restart Rocket.Chat:
systemctl daemon-reload && systemctl restart rocketchat

If you use mongo authentication you have to add roles

https://rocket.chat/docs/installation/updating/to-1-0/#oplog-required

If you stuck with 147 migration https://github.com/RocketChat/Rocket.Chat/issues/15171