Proxy Origin Health Check #658
Description
High-Level Summary
Confronted with an unreachable proxy, users cannot currently tell if a proxy is unreachable due to an issue on our side or theirs.
Each proxy should healthcheck its origin every N minutes and throw a flag yea/nay, a red light in the portal, and a boolean attribute label on the resource.
Response codes other than the 500 class are passes, a 500 or a nonresponse is a fail.
Motivation
Let users discover whether Datum is to blame for a nonresponsive proxy.
Goals
Clarify for users whether origins are reachable by Datum proxies, whenever a user might suspect.