// +optional
  optional string concurrencyPolicy = 3;

  // This flag tells the controller to suspend subsequent executions, it does
  // not apply to already started executions.  Defaults to false.
  // +optional
  optional bool suspend = 4;

  // Specifies the job that will be created when executing a CronJob.
  optional JobTemplateSpec jobTemplate = 5;

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**To help us figure out who should review this PR, please put an X in all the areas that this PR affects.**

- [ ] Ambient
- [ ] Configuration Infrastructure
- [ ] Docs
- [ ] Dual Stack
- [ ] Installation
- [ ] Networking
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- [ ] Policies and Telemetry
- [ ] Security
- [ ] Test and Release
- [ ] User Experience
- [ ] Developer Infrastructure

// the resulting attributes are.
message ResourceClaimStatus {
  // DriverName is a copy of the driver name from the ResourceClass at
  // the time when allocation started.
  // +optional
  optional string driverName = 1;

  // Allocation is set by the resource driver once a resource or set of
  // resources has been allocated successfully. If this is not specified, the

  // +optional
  optional string concurrencyPolicy = 3;

  // This flag tells the controller to suspend subsequent executions, it does
  // not apply to already started executions.  Defaults to false.
  // +optional
  optional bool suspend = 4;

  // Specifies the job that will be created when executing a CronJob.
  optional JobTemplateSpec jobTemplate = 5;

  // to SingleStack. Services can be "SingleStack" (a single IP family),
  // "PreferDualStack" (two IP families on dual-stack configured clusters or
  // a single IP family on single-stack clusters), or "RequireDualStack"
  // (two IP families on dual-stack configured clusters, otherwise fail). The
  // ipFamilies and clusterIPs fields depend on the value of this field. This

### Writing controllers

Istio provides a few helper libraries to get started writing a controller. While these libraries help, there are still a lot of subtleties in correctly writing (and testing!) a controller properly.

To get started writing a controller, review the [Example Controller](../../pkg/kube/controllers/example_test.go).

### Controllers overview