Kibana is not able to visit with error code 503 and 000

[KypMon]

I just follow along the tutorial helm-charts/elasticsearch/examples/security at main · elastic/helm-charts · GitHub and helm-charts/kibana/examples/security at main · elastic/helm-charts · GitHub

Elasticsearch all works file, but for Kibana, even the status is ready and running, like this:

helm-kibana-kibana-947699464-fpbms   1/1     Running   0          18m

I cannot visit the app no matter via kubectl port-forward or kubectl exec and then curl -k the localhost . Response is always localhost didn’t send any data. (in browser or `

bash-curl -k https://0.0.0.0:5601
bash-4.4$

when kubectl describe , the response is

  Normal   Started           12m                kubelet            Started container kibana
  Warning  Unhealthy         11m                kubelet            Readiness probe failed: Error: Got HTTP code 503 but expected a 200
  Warning  Unhealthy         11m (x2 over 12m)  kubelet            Readiness probe failed: Error: Got HTTP code 000 but expected a 200

the kubectl logs returns

...
[2021-10-22T11:42:26.209+00:00][INFO ][plugins.monitoring.monitoring.kibana-monitoring] Starting monitoring stats collection
[2021-10-22T11:42:26.964+00:00][INFO ][plugins.securitySolution] Dependent plugin setup complete - Starting ManifestTask
[2021-10-22T11:42:27.708+00:00][INFO ][status] Kibana is now degraded
[2021-10-22T11:42:27.731+00:00][INFO ][plugins.reporting.chromium] Browser executable: /usr/share/kibana/x-pack/plugins/reporting/chromium/headless_shell-linux_x64/headless_shell
[2021-10-22T11:42:27.732+00:00][WARN ][plugins.reporting.chromium] Enabling the Chromium sandbox provides an additional layer of protection.
[2021-10-22T11:42:33.234+00:00][INFO ][status] Kibana is now available (was degraded)

please comment if you need further details

Steps to reproduce:

1. just follow along the tutorial. I only make several changes to the default values.yaml

in the kibana one, add

kibanaConfig:
  kibana.yml: |
    server.ssl:
      enabled: true
      key: /usr/share/kibana/config/certs/elastic-certificate.pem
      certificate: /usr/share/kibana/config/certs/elastic-certificate.pem
    xpack.security.encryptionKey: ${KIBANA_ENCRYPTION_KEY}
    xpack.encryptedSavedObjects.encryptionKey: ${KIBANA_ENCRYPTION_KEY}
    elasticsearch.ssl:
      certificateAuthorities: /usr/share/kibana/config/certs/elastic-certificate.pem
      verificationMode: certificate

and

healthCheckPath: /api/status

[KypMon]

checked the matrix found that my kubernetes cluster version is not supported anymore.