// - Honor: nodes without taints, along with tainted nodes for which the incoming pod
  // has a toleration, are included.
  // - Ignore: node taints are ignored. All nodes are included.
  //
  // If this value is nil, the behavior is equivalent to the Ignore policy.
  // This is a beta-level feature default enabled by the NodeInclusionPolicyInPodTopologySpread feature flag.
  // +optional

* StatefulSet: The deprecated `pod.alpha.kubernetes.io/initialized` annotation for interrupting the StatefulSet Pod management is now ignored. StatefulSets with this annotation set to `true` or with no value will behave just as they did in previous versions. Dormant StatefulSets with the annotation set to `false` will become active after upgrading.

- `kubeadm`: turned on feature gate `MergeCLIArgumentsWithConfig` to merge the config from flag and config file, otherwise, if the flag `--ignore-preflight-errors` is set from the CLI, then the value from config file will be ignored. ([#119946](https://github.com/kubernetes/kubernetes/pull/119946), [@chendave](https://github.com/chendave))

- You can now use kubeadm's `InitConfiguration` and `JoinConfiguration` to define which preflight errors will be ignored. ([#75499](https://github.com/kubernetes/kubernetes/pull/75499), [@marccarre](https://github.com/marccarre))

* Fixed a bug in the apiserver storage that could cause just-added finalizers to be ignored on an immediately following delete request, leading to premature deletion. ([#77619](https://github.com/kubernetes/kubernetes/pull/77619), [@caesarxuchao](https://github.com/caesarxuchao))

* Node affinity has moved from annotations to api fields in the pod spec.  Node affinity that is defined in the annotations will be ignored. ([#37299](https://github.com/kubernetes/kubernetes/pull/37299), [@rrati](https://github.com/rrati))

* The Sysctls experimental feature has been promoted to beta (enabled by default via the `Sysctls` feature flag). PodSecurityPolicy and Pod objects now have fields for specifying and controlling sysctls. Alpha sysctl annotations will be ignored by 1.11+ kubelets. All alpha sysctl annotations in existing deployments must be converted to API fields to be effective. ([#6371](https://github.com/kubernetes/kubernetes/pull/63717), [@ingvagabund](https://github.com/ingvagabund))

### **Other notable changes**

#### Admission plugin
* OwnerReferencesPermissionEnforcement admission plugin ignores pods/status. ([#45747](https://github.com/kubernetes/kubernetes/pull/45747), [@derekwaynecarr](https://github.com/derekwaynecarr))


* Ignored mirror pods in PodPreset admission plugin. ([#45958](https://github.com/kubernetes/kubernetes/pull/45958), [@k82cn](https://github.com/k82cn))

<pre>
one, two, three = '一', '二', '三'
</pre>

<p>
The <a href="#Blank_identifier">blank identifier</a> provides a way to
ignore right-hand side values in an assignment:
</p>

<pre>
_ = x       // evaluate x but ignore it
x, _ = f()  // evaluate f() but ignore second result value
</pre>

<p>
The assignment proceeds in two phases.

  
  When the feature gate is enabled, kubelet ignores errors that happens during setting the following sysctl values: `vm.overcommit_memory`, `vm.panic_on_oom`, `kernel.panic`, `kernel.panic_on_oops`, `kernel.keys.root_maxkeys`, `kernel.keys.root_maxbytes`. (These sysctl values for the host, not for the containers)
  
  kubelet also ignores an error during opening `/dev/kmsg`.