If you need a highly available broker you can consider https://github.com/streamnative/mop https://github.com/streamnative/mop which adds a MQTT protocol handle

If you need a highly available broker you can consider https://github.com/streamnative/mop https://github.com/streamnative/mop which adds a MQTT protocol handler to Apache Pulsar. I recently contributed auth support and TLS support also just landed. There is perhaps a few non-standards compliant things that need to be worked out but it's in fairly good shape.