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20f7f37c49
Automatic merge from submit-queue (batch tested with PRs 61894, 61369). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Expose kubelet health checks using new prometheus endpoint **What this PR does / why we need it**: Expose the results of kubelet liveness and readiness probes through a new endpoint on the kubelet called /containerHealth. This endpoint will expose a Prometheus metric. Below is a snippet of output when that endpoint is queried. ``` rramkumar@e2e-test-rramkumar-master ~ $ curl localhost:10255/metrics/probes # HELP prober_probe_result The result of a liveness or readiness probe for a container. # TYPE prober_probe_result gauge prober_probe_result{container_name="kube-apiserver",namespace="kube-system",pod_name="kube-apiserver-e2e-test-rramkumar-master",pod_uid="949e11ad296ad9e3c842fd900f8cc723",probe_type="Liveness"} 0 prober_probe_result{container_name="kube-controller-manager",namespace="kube-system",pod_name="kube-controller-manager-e2e-test-rramkumar-master",pod_uid="0abfc37840bba279706ec39ae53a924c",probe_type="Liveness"} 0 prober_probe_result{container_name="kube-scheduler",namespace="kube-system",pod_name="kube-scheduler-e2e-test-rramkumar-master",pod_uid="0cd4171f9c806808291e6e24f99f0454",probe_type="Liveness"} 0 prober_probe_result{container_name="l7-lb-controller",namespace="kube-system",pod_name="l7-lb-controller-v0.9.8-alpha.2-e2e-test-rramkumar-master",pod_uid="968c792f4c1772566c71403dca2407f9",probe_type="Liveness"} 0 ``` **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes #58235 **Release note**: ```release-note Kubelet now exposes a new endpoint /metrics/probes which exposes a Prometheus metric containing the liveness and/or readiness probe results for a container. ```