I just had the dream meeting with a dockerized app. This is a use-case for containerization.
I had to use MongoDB 3.0 to export some data and place it in a 2.6. Ouch: The 2.6 can’t connect to the 3.0.
@olleolleolle I didn't even know that mongodb still existed.
— Martin Gausby (@gausby) November 29, 2016
A genius sat down at the exact moment of my complaining. “Just use Docker.”
So – to get and run the 3.0 Docker image of MongoDB – started with a bash shell:
docker run -ti --rm -v /Users/olle/slask/portal-test:/backup mongo:3.0 /bin/bash
When that pulls down and starts the shell, things are automated, and we land in a shell.
There, we can do the 3.0 invocation of mongodump:
mongodump -h ds012345-a0.mongolab.com:12345 -d portal-test -u portal-user -p secret -o /backup/portal-test
This gave me a dump folder at:
I had been too generous with the wrapping folders. No biggie.
Then, the local 2.6 invocation:
mongorestore -d portal-test /Users/olle/slask/portal-test/portal-test/portal-test