// '*/*' means all resources and their subresources.
  //
  // If wildcard is present, the validation rule will ensure resources do not
  // overlap with each other.
  //
  // Depending on the enclosing object, subresources might not be allowed.
  // Required.
  // +listType=atomic
  repeated string resources = 3;

  // scope specifies the scope of this rule.
  // Valid values are "Cluster", "Namespaced", and "*"

  optional ContainerResourceMetricSource containerResource = 7;

  // external refers to a global metric that is not associated
  // with any Kubernetes object. It allows autoscaling based on information
  // coming from components running outside of cluster
  // (for example length of queue in cloud messaging service, or
  // QPS from loadbalancer running outside of cluster).
  // +optional
  optional ExternalMetricSource external = 5;

  optional ContainerResourceMetricSource containerResource = 7;

  // external refers to a global metric that is not associated
  // with any Kubernetes object. It allows autoscaling based on information
  // coming from components running outside of cluster
  // (for example length of queue in cloud messaging service, or
  // QPS from loadbalancer running outside of cluster).
  // +optional
  optional ExternalMetricSource external = 5;

  // connection to the real kubelet is vulnerable to a man in the middle attack (e.g. an attacker could not intercept
  // the actual log data coming from the real kubelet).
  // +optional
  optional bool insecureSkipTLSVerifyBackend = 9;
}

// PodOS defines the OS parameters of a pod.
message PodOS {