I am using kubernetes provided by docker for windows. There I deployed a component Hashicorp Vault. Vault internally calls kubernetes api to authenticate kubernetes login for vault. When I am calling the vault api to fetch client token, it is failing with below 500 error:

{"errors":["Post https://kubernetes/apis/authentication.k8s.io/v1/tokenreviews: x509: certificate signed by unknown authority"

endpoint I am calling:

curl --request POST --data @payload3.json http://127.0.0.1:8200/v1/auth/kubernetes/login

Please see this question posted by me earlier to get the context: Not able to access kubernetes api from inside a pod container

Seems like it is an issue with unix so added unix tag.

Any help would be greatly appreciated.