Import and Export with mongodump and mongorestore

Hello, I'm incompetent.

This is a memo on how to migrate a DB to a migration destination in MongoDB.

First, I want to use the command in the title, so I'll install `mongodb-tools-bin`.

 yay -S mongodb-tools-bin

Source

With MongoDB running, use `mongosh`.

Then, check the DB.

test> show dbs
admin    40.00 KiB
~~~

Here, I'll try `admin`.

test> use admin
switched to db admin
admin> show tables
system.version
admin> db.system.version.find()
[ { _id: 'featureCompatibilityVersion', version: '7.0' } ]

So, if you confirm the contents with these steps and there are no mistakes, then `mongodump`.

mongodump --db admin --out ./

Set the path and DB name according to your environment, and this should produce the output.

Once output, move it to the migration destination using `scp` or some other method.

Destination

Just this.

mongorestore --uri="mongodb://127.0.0.1:27017/admintest" /path/to/admindatabase

Set the MongoDB connection destination and import destination (e.g., `admintest` in the above case) accordingly,

and change `/path/to/admindatabase` to the specified location.

Check the contents using the same steps as before.

That's all.

Looking forward to next time.