My go-to solution for fault-tolerant message queues is nsq (https://nsq.io/). nsq works differently from most other message queues in that it's supposed to be run in a distributed fashion, i.e. one nsqd running wherever messages are produced. That way you have a lightweight and fast local message queue that you can push messages to and not worry about network connectivity. You can use nsqlookupd to find the distributed nsqd that hold the topic you want to subscribe to, or you can run an additional nsq-to-nsq process to push messages from one broker to the next. It's a really great and very mature and stable piece of software. I'd say the only downside to using nsq is that you have to invest a little more in monitoring and you have to make sure that network connectivity between your consumer and each nsqd that carries a certain topic is possible.