While installing Vault Cluster on kubernetes, I have the requirements for 3 certificates

          tls_cert_file = "/vault/userconfig/tls-server/tls.crt"
          tls_key_file = "/vault/userconfig/tls-server/tls.key"
          tls_ca_cert_file = "/vault/userconfig/tls-ca/ca.crt"

I have generated the CSR for cert nd key files and approved them with the ‘kubernetes.io/kubelet-serving’ signer.
I now need to download the public key for the tlscacert_file but cannot find it. Can someone please point me in the direction where to get this key from .