diff --git a/content/en/docs/concepts/configuration/pod-priority-preemption.md b/content/en/docs/concepts/configuration/pod-priority-preemption.md index 297c61f1a7d7d..7b92b1cd1267f 100644 --- a/content/en/docs/concepts/configuration/pod-priority-preemption.md +++ b/content/en/docs/concepts/configuration/pod-priority-preemption.md @@ -9,7 +9,7 @@ weight: 70 {{% capture overview %}} -{{< feature-state for_k8s_version="1.11" state="beta" >}} +{{< feature-state for_k8s_version="1.14" state="stable" >}} [Pods](/docs/user-guide/pods) can have _priority_. Priority indicates the importance of a Pod relative to other Pods. If a Pod cannot be scheduled, the @@ -19,8 +19,8 @@ pending Pod possible. In Kubernetes 1.9 and later, Priority also affects scheduling order of Pods and out-of-resource eviction ordering on the Node. -Pod priority and preemption are moved to beta since Kubernetes 1.11 and are -enabled by default in this release and later. +Pod priority and preemption graduated to beta in Kubernetes 1.11 and to GA in +Kubernetes 1.14. They have been enabled by default since 1.11. In Kubernetes versions where Pod priority and preemption is still an alpha-level feature, you need to explicitly enable it. To use these features in the older @@ -34,6 +34,7 @@ Kubernetes Version | Priority and Preemption State | Enabled by default 1.9 | alpha | no 1.10 | alpha | no 1.11 | beta | yes +1.14 | GA | yes {{< warning >}}In a cluster where not all users are trusted, a malicious user could create pods at the highest possible priorities, causing @@ -71,15 +72,15 @@ Pods. ## How to disable preemption {{< note >}} -In Kubernetes 1.11, critical pods (except DaemonSet pods, which are -still scheduled by the DaemonSet controller) rely on scheduler preemption to be -scheduled when a cluster is under resource pressure. For this reason, you will -need to run an older version of Rescheduler if you decide to disable preemption. -More on this is provided below. +In Kubernetes 1.12+, critical pods rely on scheduler preemption to be scheduled +when a cluster is under resource pressure. For this reason, it is not +recommended to disable preemption. {{< /note >}} In Kubernetes 1.11 and later, preemption is controlled by a kube-scheduler flag `disablePreemption`, which is set to `false` by default. +If you want to disable preemption despite the above note, you can set +`disablePreemption` to `true`. This option is available in component configs only and is not available in old-style command line options. Below is a sample component config to disable @@ -96,20 +97,6 @@ algorithmSource: disablePreemption: true ``` -### Start an older version of Rescheduler in the cluster - -When priority or preemption is disabled, we must run Rescheduler v0.3.1 (instead -of v0.4.0) to ensure that critical Pods are scheduled when nodes or cluster are -under resource pressure. Since critical Pod annotation is still supported in -this release, running Rescheduler should be enough and no other changes to the -configuration of Pods should be needed. - -Rescheduler images can be found at: -[gcr.io/k8s-image-staging/rescheduler](http://gcr.io/k8s-image-staging/rescheduler). - -In the code, changing the Rescheduler version back to v.0.3.1 is the reverse of -[this PR](https://github.com/kubernetes/kubernetes/pull/65454). - ## PriorityClass A PriorityClass is a non-namespaced object that defines a mapping from a