mongodb dump and pipe to other db name - mongodb

Question

Mongodb version 3.2.12. I have two local databases, "base1" and "base2"
I want to copy all data (all collections) from base1 over to base2, replacing everything there (like when dumping production to a dev environment).
Any pipe command (or other simple way) to do this?
I tried
mongodump --archive --db base1 | mongorestore --db base2 --archive
lists a lot of "writing base1.collectionname to archive on stdout", but nothing gets written to base2.
I also tried
mongodump --db base1 --gzip --archive=/path/to/file.gz
mongorestore --db base2 --gzip --archive=/path/to/file.gz
Dump works, restore just says "creating intents for archive", "done"

Answer 1

I come across the same issue and after some googling and search I found this post
https://stackoverflow.com/a/43810346/3785901
I tried this command mentioned:
mongodump --host HOST:PORT --db SOURCE_DB --username USERNAME --password PASSWORD --archive | mongorestore --host HOST:PORT --nsFrom 'SOURCE_DB.*' --nsTo 'TARGET_DB.*' --username USERNAME --password PASSWORD --archive --drop
and it works like a charm.
It should work in your case, good luck.

Answer 2

I use following commands:
mongodump \
--host ${mongo.host} \
--port ${mongo.port} \
--username ${mongo.backup_restore_user} \
--password ${mongo.backup_restore_password} \
--db ${mongo.db} \
--gzip \
--dumpDbUsersAndRoles \
--archive=${archive}
and
mongorestore \
--keepIndexVersion \
--drop \
--gzip \
--restoreDbUsersAndRoles \
--db ${mongo.db} \
--host ${mongo.host} --port ${pims.mongo.port} \
--username ${mongo.backup_restore_user} \
--password ${mongo.backup_restore_password} \
--archive=${archive}