containerID = candidateContainerID
		case containerID != candidateContainerID:
			// More than one container ID found in the cgroups.
			return "", "", fmt.Errorf("multiple container IDs found in cgroups (%s, %s)",
				containerID, candidateContainerID)
		case podUID != candidatePodUID:
			// More than one pod UID found in the cgroups.
			return "", "", fmt.Errorf("multiple pod UIDs found in cgroups (%s, %s)",

  // audit annotation is included with the string value. If the expression
  // evaluates to null or empty string the audit annotation will be omitted.
  // The valueExpression may be no longer than 5kb in length.
  // If the result of the valueExpression is more than 10kb in length, it
  // will be truncated to 10kb.
  //
  // If multiple ValidatingAdmissionPolicyBinding resources match an
  // API request, then the valueExpression will be evaluated for

  //
  // BorrowingCL(i) = round( NominalCL(i) * borrowingLimitPercent(i)/100.0 )
  //
  // The value of this field can be more than 100, implying that this
  // priority level can borrow a number of seats that is greater than
  // its own nominal concurrency limit (NominalCL).
  // When this field is left `nil`, the limit is effectively infinite.
  // +optional

  //
  // BorrowingCL(i) = round( NominalCL(i) * borrowingLimitPercent(i)/100.0 )
  //
  // The value of this field can be more than 100, implying that this
  // priority level can borrow a number of seats that is greater than
  // its own nominal concurrency limit (NominalCL).
  // When this field is left `nil`, the limit is effectively infinite.
  // +optional

  //                     required by the PodDisruptionBudget. No disruptions are
  //                     allowed and the status of the condition will be False.
  // - SufficientPods: There are more pods than required by the PodDisruptionBudget.
  //                   The condition will be True, and the number of allowed
  //                   disruptions are provided by the disruptionsAllowed property.
  //
  // +optional

      tolerations: []

      # Specify the pod anti-affinity that allows you to constrain which nodes
      # your pod is eligible to be scheduled based on labels on pods that are
      # already running on the node rather than based on labels on nodes.
      # There are currently two types of anti-affinity:
      #    "requiredDuringSchedulingIgnoredDuringExecution"
      #    "preferredDuringSchedulingIgnoredDuringExecution"

      tolerations: []

      # Specify the pod anti-affinity that allows you to constrain which nodes
      # your pod is eligible to be scheduled based on labels on pods that are
      # already running on the node rather than based on labels on nodes.
      # There are currently two types of anti-affinity:
      #    "requiredDuringSchedulingIgnoredDuringExecution"
      #    "preferredDuringSchedulingIgnoredDuringExecution"

```

These rules are expressed in code in the
[name](https://github.com/istio/operator/blob/e9097258cb4fbe59648e7da663cdad6f16927b8f/pkg/name/name.go#L131) package.

### K8s settings

Rather than defining selective mappings from parameters to fields in K8s resources, the `IstioOperatorSpec` API
contains a consistent K8s block for each Istio component. The available K8s settings are defined in

			// no updateTokenSecret means re-fetching yields the same result
			obj := []runtime.Object{c.haveTokenSecret}
			if c.updatedTokenSecret != nil {
				// fetching should give a different result than the token secret we pass in
				obj = []runtime.Object{c.updatedTokenSecret}
			}
			client := kube.NewFakeClient(obj...)

  // available.
  // +optional
  optional int32 minReplicas = 2;

  // maxReplicas is the upper limit for the number of pods that can be set by the autoscaler; cannot be smaller than MinReplicas.
  optional int32 maxReplicas = 3;

  // targetCPUUtilizationPercentage is the target average CPU utilization (represented as a percentage of requested CPU) over all the pods;