Live Migration from DigitalOcean MongoDB cluster to MongoDB Atlas using mongomirror

config.yaml

destinationPassword: password
uri: mongodb+srv://username:password@primary.mongo.ondigitalocean.com/admin?tls=true&authSource=admin&replicaSet=replicaset

mongomirror

mongomirror \
  --destination atlas-rs-shard-0/node0.mongodb.net:27017,node1.mongodb.net:27017,node2.mongodb.net:27017 \
  --destinationUsername username \
  --drop \
  --sslCAFile ca-certificate.crt \
  --oplogPath oplog \
  --httpStatusPort 8080 \
  --config=config.yaml \
  2>&1 | tee -a mongomirror.log