Yi Cheng a68c02a15d [dashboard][2/2] Add endpoints to dashboard and dashboard_agent for liveness check of raylet and gcs (#26408) ... ## Why are these changes needed? As in this https://github.com/ray-project/ray/pull/26405 we added the health check for gcs and raylets. This PR expose them in the endpoint in dashboard and dashboard agent. For dashboard, we added `http://host:port/api/gcs_healthz` and it'll send RPC to GCS directly to see whether the GCS is alive or not. For agent, we added `http://host:port/api/local_raylet_healthz` and it'll send RPC to GCS to check whether raylet is alive or not. We think raylet is live if - GCS is dead - GCS is alive but GCS think the raylet is dead If GCS is dead for more than X seconds (60 by default), raylet will just crash itself, so KubeRay can still catch it.		2022-07-09 13:09:48 -07:00
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test_healthz.py	[dashboard][2/2] Add endpoints to dashboard and dashboard_agent for liveness check of raylet and gcs (#26408)	2022-07-09 13:09:48 -07:00