Ask HN: Long-running polling jobs in FaaS?

Scenario: We need to deploy several long-running polling servers that poll some source (e.g. web page, database). Deployment should work very much like in FaaS such as projectfn, fission.

Problem: projectfn and fission both only support short-lived function calls, but no polling servers. This limits what you can do pretty much.

Alternatives might be dokku or using a straight forward k8s deployment descriptor.

Thoughts?