Deprecated MongoDB <= 4.0 - update docker-compose.yml

[sephentos]

docker-compose.yml should be updated accordingly to changed mongo dependency on 4.0.0

[arunoruto]

I faced the issue too.
One big bummer, is the removal of the mmapv1 storage engine. So a migration needs to be done (I guess, I am not experienced with databases). So a small guide on that would be nice too.

[sephentos]

I faced the issue too. One big bummer, is the removal of the mmapv1 storage engine. So a migration needs to be done (I guess, I am not experienced with databases). So a small guide on that would be nice too.

You can find a migration guide here:
Docker: https://docs.rocket.chat/installing-and-updating/docker-containers/mongodb-mmap-to-wiredtiger-migration
Without docker (for our google visitors :)): https://docs.rocket.chat/installing-and-updating/manual-installation/mongodb-mmap-to-wiredtiger-migration

I've followed these steps and managed to upgrade to Mongo 4.2 within docker.
After migrating you can change the 4.0 tags in docker-compose.yml to 4.2.

[maeries]

Thanks for the link, but what am I supposed to to after that? Switch back to the docker-compose.yml I used before or should I keep using the one with the migrator?

[arunoruto]

@sephentos thanks a lot for the link! I just did the migration successfully and should probably keep the database up-to-date I guess!

@maeries I switched to my previous docker-compose and just changed the version from 4.0 to 4.2 and the previous mongo command, to the one provided in the migration compose file mongod --oplogSize 128 --replSet rs0 --storageEngine=wiredTiger. I guess you can also leave the migration file, but comment the migration part out, since I would also guess you dont want the migration container to run every time you recreate your stack