Can sensu 5 agents connect to sensu 6 backends?

This is just a quick question in the title.

Planning a upgrade from sensu 5 to 6 and I want to know if I need to upgrade my agents immediately or not.

Thanks for your time!

Yes, sensu-agent 5.x can connect to and work with a 6.x backend. A quick scan through entities in one of my production clusters, running the 6.3.0 backend, shows a couple dozen still running the 5.20.1 agent.

That said, if you wanted to use agent-managed entities (which was the default behavior in 5.x), you will need to upgrade them to 6.2.3 or higher before changes to the agent.yml file are reflected in the backend.

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