Does anyone successfully setup kubernetes executor/runner on gitlab for CI jobs? I set up mine but its stucking on executing my pipeline indefinitely.

I'm running a runner as a docker container on top of kubernetes cluster and connecting to my gitlab instance for handling my CI builds.

Any working config file would be appreciated.

My runner configuration looks like this:

[[runners]]
  name = "kube-executor"
  url = "https://gitlab.example.ltd/"
  token = "some-token"
  executor = "kubernetes"
  [runners.cache]
  [runners.kubernetes]
    host = "https://my-kubernetes-api-address:443"
    ca_file = "/etc/ssl/certs/ca.crt"
    cert_file = "/etc/ssl/certs/server.crt"
    key_file = "/etc/ssl/certs/server.key"
    image = "docker:latest"
    namespace = "gitlab"
    namespace_overwrite_allowed = "ci-.*"
    privileged = true
    cpu_limit = "1"
    memory_limit = "1Gi"
    service_cpu_limit = "1"
    service_memory_limit = "1Gi"
    helper_cpu_limit = "500m"
    helper_memory_limit = "100Mi"
    poll_interval = 5
    poll_timeout = 3600
    [runners.kubernetes.volumes]

this throws this error: ERROR: Job failed (system failure): Post https://my-kubernetes-api-address:443/api/v1/namespaces/gitlab/secrets: x509: certificate signed by unknown authority