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Add information how to enable cronjob controller v2 #24885

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Add information how to enable cronjob controller v2 #24885

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10 changes: 8 additions & 2 deletions content/en/docs/concepts/workloads/controllers/cron-jobs.md
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Expand Up @@ -32,8 +32,6 @@ The name must be no longer than 52 characters. This is because the CronJob contr
append 11 characters to the job name provided and there is a constraint that the
maximum length of a Job name is no more than 63 characters.



<!-- body -->

## CronJob
Expand Down Expand Up @@ -82,6 +80,14 @@ be down for the same period as the previous example (`08:29:00` to `10:21:00`,)
The CronJob is only responsible for creating Jobs that match its schedule, and
the Job in turn is responsible for the management of the Pods it represents.

## New controller

There's an alternative implementation of the CronJob controller, available as an alpha feature since Kubernetes 1.20. To select version 2 of the CronJob controller, pass the following [feature gate](/docs/reference/command-line-tools-reference/feature-gates/) flag to the {{< glossary_tooltip term_id="kube-controller-manager" text="kube-controller-manager" >}}.

```
--feature-gates="CronJobControllerV2=true"
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```


## {{% heading "whatsnext" %}}

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2 changes: 2 additions & 0 deletions content/en/docs/reference/command-line-tools-reference/feature-gates.md
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Expand Up @@ -83,6 +83,7 @@ different Kubernetes components.
| `CSIVolumeFSGroupPolicy` | `false` | Alpha | 1.19 | |
| `ConfigurableFSGroupPolicy` | `false` | Alpha | 1.18 | 1.19 |
| `ConfigurableFSGroupPolicy` | `true` | Beta | 1.20 | |
| `CronJobControllerV2` | `false` | Alpha | 1.20 | |
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| `CustomCPUCFSQuotaPeriod` | `false` | Alpha | 1.12 | |
| `CustomResourceDefaulting` | `false` | Alpha| 1.15 | 1.15 |
| `CustomResourceDefaulting` | `true` | Beta | 1.16 | |
Expand Down Expand Up @@ -402,6 +403,7 @@ Each feature gate is designed for enabling/disabling a specific feature:
Check [Service Account Token Volumes](https://git.k8s.io/community/contributors/design-proposals/storage/svcacct-token-volume-source.md)
for more details.
- `ConfigurableFSGroupPolicy`: Allows user to configure volume permission change policy for fsGroups when mounting a volume in a Pod. See [Configure volume permission and ownership change policy for Pods](/docs/tasks/configure-pod-container/security-context/#configure-volume-permission-and-ownership-change-policy-for-pods) for more details.
- `CronJobControllerV2`: Use an alternative implementation of the {{< glossary_tooltip text="CronJob" term_id="cronjob" >}} controller. Otherwise, version 1 of the same controller is selected. The version 2 controller provides experimental performance improvements.
- `CPUManager`: Enable container level CPU affinity support, see [CPU Management Policies](/docs/tasks/administer-cluster/cpu-management-policies/).
- `CRIContainerLogRotation`: Enable container log rotation for cri container runtime.
- `CSIBlockVolume`: Enable external CSI volume drivers to support block storage. See the [`csi` raw block volume support](/docs/concepts/storage/volumes/#csi-raw-block-volume-support) documentation for more details.
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