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<!-- We’re pleased to announce the release of Kubernetes 1.20, our third and final release of 2020! This release consists of 42 enhancements: 11 enhancements have graduated to stable, 15 enhancements are moving to beta, and 16 enhancements are entering alpha. -->
<!-- The 1.20 release cycle returned to its normal cadence of 11 weeks following the previous extended release cycle. This is one of the most feature dense releases in a while: the Kubernetes innovation cycle is still trending upward. This release has more alpha than stable enhancements, showing that there is still much to explore in the cloud native ecosystem. -->
<!-- Invocations using `kubectl alpha debug` are now deprecated and will be removed in a subsequent release. Update your scripts to use `kubectl debug`. For more information about `kubectl debug`, see [Debugging Running Pods](https://kubernetes.io/docs/tasks/debug-application-cluster/debug-running-pod/). -->
<!-- Administrators require mechanisms to ensure that user pods cannot induce pid exhaustion that prevents host daemons (runtime, kubelet, etc) from running. In addition, it is important to ensure that pids are limited among pods in order to ensure they have limited impact to other workloads on the node. -->
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<!-- After being enabled-by-default for a year, SIG Node graduates PID Limits to GA on both `SupportNodePidsLimit` (node-to-pod PID isolation) and `SupportPodPidsLimit` (ability to limit PIDs per pod). -->
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管理员需要机制来确保用户 pod 不会导致 pid 耗尽,从而阻止主机守护程序(运行时、kubelet 等)运行。此外,重要的是要确保 pod 之间的 pid 受到限制,以确保它们对节点上的其他工作负载的影响有限。
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默认启用一年后,SIG Node 在 `SupportNodePidsLimit`(节点到 Pod PID 隔离)和 `SupportPodPidsLimit`(限制每个 Pod 的 PID 的能力)上都将 PID 限制升级为 GA。
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默认启用一年后,SIG Node 在 `SupportNodePidsLimit`(节点到 Pod PID 隔离)和 `SupportPodPidsLimit`(限制每个 Pod 的 PID 的能力)上都将 PID 限制升级为 GA。
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