KUBERNETES: KUBECTL Command To Check Health Status and Liveliness Probe (livez check) Of Kubernetes Components

Below kubectl command can be used on the Kubernetes Control plane node.

kubectl get --raw='/readyz?verbose'

Alternatively below curl command can also be used instead.

curl -k https://localhost:6443/livez?verbose

Below is sample output of above command.

[+]ping ok

[+]log ok

[+]etcd ok

[+]poststarthook/start-kube-apiserver-admission-initializer ok

[+]poststarthook/generic-apiserver-start-informers ok

[+]poststarthook/priority-and-fairness-config-consumer ok

[+]poststarthook/priority-and-fairness-filter ok

[+]poststarthook/storage-object-count-tracker-hook ok

[+]poststarthook/start-apiextensions-informers ok

[+]poststarthook/start-apiextensions-controllers ok

[+]poststarthook/crd-informer-synced ok

[+]poststarthook/start-service-ip-repair-controllers ok

[+]poststarthook/rbac/bootstrap-roles ok

[+]poststarthook/scheduling/bootstrap-system-priority-classes ok

[+]poststarthook/priority-and-fairness-config-producer ok

[+]poststarthook/start-system-namespaces-controller ok

[+]poststarthook/bootstrap-controller ok

[+]poststarthook/start-cluster-authentication-info-controller ok

[+]poststarthook/start-kube-apiserver-identity-lease-controller ok

[+]poststarthook/start-kube-apiserver-identity-lease-garbage-collector ok

[+]poststarthook/start-legacy-token-tracking-controller ok

[+]poststarthook/aggregator-reload-proxy-client-cert ok

[+]poststarthook/start-kube-aggregator-informers ok

[+]poststarthook/apiservice-registration-controller ok

[+]poststarthook/apiservice-status-available-controller ok

[+]poststarthook/kube-apiserver-autoregistration ok

[+]autoregister-completion ok

[+]poststarthook/apiservice-openapi-controller ok

[+]poststarthook/apiservice-openapiv3-controller ok

[+]poststarthook/apiservice-discovery-controller ok

livez check passed