How do I copy a database from one MongoDB server to another?

Question

I have two mongodbs in different server, both start with --auth. Now I want to copy a db from one server to another.

> mongo
> use admin
&         


        

Answer 1

In addition to the answer of Mike Shauneu, if your database name on the destination server is not the same as on the source server you need to rewrite the namespace. In combination with authentication I got this to work using the --uri option, which requires a recent mongo version (>3.4.6):

mongodump --uri="mongodb://$sourceUser:$sourcePwd@$sourceHost/$sourceDb" --gzip --archive | mongorestore --uri="mongodb://$targetUser:$targetPwd@$targetHost/$targetDb" --nsFrom="$sourceDb.*" --nsTo="$targetDb.*" --gzip --archive