I am trying to backup a database from a kubernetes cluster to my computer as a bson file. I have connected my mongodb compass to the kubernetes cluster using port-forwarding. Can anyone help me with the command I need to download a particular Collection (450gb) from a databank to my desktop?
I've been trying for a while now but I cant seem to find the way around it.
In mongocompass there is unfortunately no way to download a collection as a bson file. The port I have forwarded the kubernetes pod to is 27017.
From the mongodb official docs:
Run
mongodumpfrom the system command line, not themongoshell.
So, assuming you configured Kubernetes Port Forwarding on your local machine like this:
$ kubectl port-forward service/mongo 28015:27017
And you've got output similar to this:
Forwarding from 127.0.0.1:28015 -> 27017
Forwarding from [::1]:28015 -> 27017
You can now export data from mongodb using the following command:
$ mongodump --username root --port=28015 -p secretpassword
This will create a dump directory in the current working directory and export data there.
Also, to export only specific collection use the following option:
--collection=<collection>, -c=<collection>
Specifies a collection to backup. If you do not specify a collection, this option copies all collections in the specified database or instance to the dump files.
You can check other available option here.