Self-signed certificate not working with docker buildx kubernetes driver

[parvathycec]

I have a kubernetes driver with registry cache as harbor. I created self-signed certificate for harbor. The host node has the harbor ingress url as insecure registry. The kubernetes driver has the certificates mounted and buildkitd.toml has ca defined. But still getting "tls: failed to verify certificate: x509: certificate signed by unknown authority".

buildkitd.toml: |
    debug=true
    [registry."harbor.harbor-registry.xxx.xxx.xxx.xxx.nip.io"]
      ca = ["/etc/ssl/buildkit/certs/harbor.harbor-registry.xxx.xxx.xxx.xxx.nip.io/ca.crt"]
      insecure = true

I also have added the harbor ingress url as an insecure registry in docker.