which version

Snap version of Wekan uses still MongoDB 3.2.22

With Docker it's possible to define any MongoDB version in docker-compose.yml that is at https://github.com/wekan/wekan

When running command meteor so that it detects changes files, it uses MongoDB version that is included in meteor install. For example, with meteor --port 4000 MongoDB starts at next port 4001

That is for development

For production, when Wekan is run with environment variables set first, and then "node main.js", then it's using production mode and any MongoDB URL

That MongoDB can be the MongoDB included in Snap, docker, on remote SaaS service, etc

MongoDB URL can also include authentication like username and password to login to MongoDB

With some changes, it's possible to use MongoDB Atlas https://github.com/wekan/wekan/issues/2977

For more scalability, it's possible to set MongoDB replica https://github.com/wekan/wekan/issues/2711#issuecomment-601163047

actually, replicaset

There are also various MongoDB sharding/clustering options, if manual setup is needed

or then just use readily scalable alternatives

https://github.com/wekan/wekan/issues/2852

I have not tested Amazon DocumentDB yet

Also I have not tried to make changes to Wekan so that FoundationDB would work, FoundationDB has huge hardware requirements where it's minimum 3 server cluster

Wekan already works with Percona Server for MongoDB https://github.com/wekan/wekan/issues/2852#issuecomment-565573038 that provides MongoDB encryption

I did test that Percona Server for MongoDB work. I did not try encryption.

here is defined that Wekan Docker version uses latest MongoDB https://github.com/wekan/wekan/blob/master/docker-compose.yml#L96

it's some 4.x

This is great info. Thanks

Any chance that the snap version will get to Mongodb 4 any time soon?

I was testing it yesterday, but it did not work yet with those changes I made. Depends when I get it working.

ok great

thank you