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health
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- kubeadm: use etcd's /health endpoint for a HTTP liveness probe on localhost instead of having a custom health check using etcdctl ([#81385](https://github.com/kubernetes/kubernetes/pull/81385), [@neolit123](https://github.com/neolit123))

- If `ComponentSLIs` feature gate is enabled, then `/metrics/slis` now becomes available on cloud-controller-manager allowing you to scrape health check metrics. ([#113340](https://github.com/kubernetes/kubernetes/pull/113340), [@Richabanker](http...

	// Use a separate client to avoid recursive calls.
	healthClient := rest.NewClient(serverURL, globalInternodeTransport, newCachedAuthToken())
	healthClient.NoMetrics = true

	// Construct a new health function.
	restClient.HealthCheckFn = func() bool {
		ctx, cancel := context.WithTimeout(context.Background(), restClient.HealthCheckTimeout)
		defer cancel()

- Kubeadm: modified the etcd static Pod `liveness` and `readiness` probes to use a new etcd `v3.5.3+` HTTP(s) health check endpoint `/health?serializable=true` that allows to track the health of individual etcd members and not fail all members if a single member is not healthy in the etcd cluster. ([#110072](https://github.com/kubernetes/kubernetes/pull/110072), [@neolit123](https://github.com/neolit123))

# Timeout for index operations.
index.index.timeout=3m
# Timeout for bulk index operations.
index.bulk.timeout=3m
# Timeout for delete operations in the index.
index.delete.timeout=3m
# Timeout for index health checks.
index.health.timeout=10m
# Timeout for index indices operations.
index.indices.timeout=1m

# filetype

# Mapping of MIME types to filetype labels for indexing.
index.filetype=\
text/html=html\n\

- Added support in the Kubelet for monitoring the health of devices allocated via Dynamic Resource Allocation (DRA) and report it in the `pod.status.containerStatuses.allocatedResourcesStatus` field. This required the DRA plugin to implement the new v1alpha1 `NodeHealth` gRPC service. This feature was controlled...

- Removed `/livez` livezchecks for KMS v1 and v2 to ensure KMS health does not cause `kube-apiserver` restart. KMS health checks are still in place as a healthz and readiness checks. ([#120583](https://github.com/kubernetes/kubernetes/pull/120583), [@ritazh](https://github.com/ritazh))

hattfjelldal.no
haugesund.no
haugiang.vn
haus
hayakawa.yamanashi.jp
hayashima.okayama.jp
hazu.aichi.jp
hb.cldmail.ru
hb.cn
hbo
hdfc
hdfcbank
he.cn
health
health-carereform.com
health.nz
health.vn
healthcare
heavy.jp
heguri.nara.jp
heiyu.space
hekinan.aichi.jp
helioho.st
heliohost.us
help
helsinki
hemne.no
hemnes.no
hemsedal.no

## Changelog since v1.18.18

## Changes by Kind

### API Change

- We have added a new Priority & Fairness rule that exempts all probes (/readyz, /healthz, /livez) to prevent 
  restarting of "healthy" kube-apiserver instance(s) by kubelet. ([#101114](https://github.com/kubernetes/kubernetes/pull/101114), [@tkashem](https://github.com/tkashem)) [SIG API Machinery]

### Bug or Regression