Achieve compatibility with BigBlueButton

[AlekSi]

https://bigbluebutton.org

Tasks

Beta Give feedback

1. Support OpLog #76
   4 of 5
   area/oplog code/feature +2

[b1ron]

@AlekSi I think we should revisit this issue soon and check compatibility.

cc. @ptrfarkas

[ian-kelling]

ferretdb is not yet working:

# install bbb based on their instructions:
wget -qO- https://raw.githubusercontent.com/bigbluebutton/bbb-install/v2.7.x-release/bbb-install.sh | bash -s -- -v focal-270 -s $(hostname -f) -e an@email.org -g
# based on command output instructions, create admin account. test joining a bbb room.

wget https://github.com/FerretDB/FerretDB/releases/download/v1.21.0/ferretdb-linux-amd64.deb
dpkg -i ferretdb-linux-amd64.deb
apt install -y mongosh

systemctl stop mongod
bbb-conf --stop

# listen ip based on /usr/share/meteor/bundle/mongo-ramdisk.conf
ferretdb --listen-addr 127.0.1.1:27017 --repl-set-name rs0 --handler=sqlite --sqlite-url 'file:./?mode=memory'
# in separate terminal:

# https://docs.ferretdb.io/configuration/oplog-support/
# based on /etc/systemd/system/mongod.service, we only want 8MB size for oplog
mongosh 127.0.1.1/local
db.createCollection('oplog.rs', { capped: true, size: 8000000 })
exit

bbb-conf --start
# start bbb room in browser. progress bar goes for 30 seconds or so, then you get an
# error message: "You have been removed from the conference
# Press the button to continue to the home screen."

I see a bunch of data in ferretdb's oplog, so it isn't clear what isn't working. bbb-conf --check didn't show any errors and ferretdb didn't output any errors. So it seems like it might be very close to working. A ferretdb developer might be able to easily figure out the problem based on the above.