Import Mongo database from snapshot volume AWS

Question

I have 2 mongo cluster with 3 nodes and a replica set configurated. The goal is to import the database from clusterA to clusterB via a master snapshot.

Those are the steps that I followed.

• Created snapshot from Ec2 masterA.
• Created volumeA from created snapshot.
• Attach volumeA to masterB.
• Mounted volumeA in masterB in /data/db2.
• Updated /etc/mongo/mongod.conf to point the new storage.
• Restarted MongoDB.

No errors when restarting, but when I connect back to the database, I still see the old collections. However, the directory /data/db2 shows a different size and matches the database in clusterA.

Thank you, any help is appreciated.

Answer 1

Found the solution:

So, we have one mongo cluster clusterA, with 1 master and 2 workers.

In clusterA, we make a snapshot from master volume, snapA and we create a volume from that snapshot volumeA.

If we want to import mongo database from clusterA to clusterB:

• First, attach volumeA in masterB.
• Mount volume, for example in /data/db2.

Once the volume is attached and mounted, follow this Mongo guide https://docs.mongodb.com/manual/tutorial/restore-replica-set-from-backup/.

After that, you'll have successfully imported a mongo backup from clusterA to clusterB via volume snapshot.

Regards.