RoadMap
关键特性
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<button class="headerButton">特性</button>
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<button class="headerButton">说明</button>
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| CPUManager | Enable container level CPU affinity support |
| CPUManagerPolicyAlphaOptions | This allows fine-tuning of CPUManager policies, experimental, Alpha-quality options This feature gate guards a group of CPUManager options whose quality level is alpha. This feature gate will never graduate to beta or stable. |
| CPUManagerPolicyBetaOptions | This allows fine-tuning of CPUManager policies, experimental, Beta-quality options This feature gate guards a group of CPUManager options whose quality level is beta. This feature gate will never graduate to stable. |
| CPUManagerPolicyOptions | Allow fine-tuning of CPUManager policies. |
| CustomCPUCFSQuotaPeriod | Enable nodes to change cpuCFSQuotaPeriod in kubelet config |
特性门控
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<button class="headerButton">特性</button>
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<button class="headerButton">默认值</button>
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<button class="headerButton">阶段</button>
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<button class="headerButton">自从</button>
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<button class="headerButton">直到</button>
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|---|---|---|---|---|
CustomCPUCFSQuotaPeriod |
false |
Alpha | 1.12 | – |
CPUManager |
false |
Alpha | 1.8 | 1.9 |
CPUManager |
true |
Beta | 1.10 | 1.25 |
CPUManager |
true |
GA | 1.26 | – |
CPUManagerPolicyAlphaOptions |
false |
Alpha | 1.23 | – |
CPUManagerPolicyBetaOptions |
true |
Beta | 1.23 | – |
CPUManagerPolicyOptions |
false |
Alpha | 1.22 | 1.22 |
CPUManagerPolicyOptions |
true |
Beta | 1.23 | – |
如何使用
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<button class="headerButton">k8s version</button>
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<button class="headerButton">配置</button>
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|---|---|
| < 1.8 | 不支持 |
| < 1.10 |
特性门控： --feature-gates= 配置参数： --cpu-manager-policy=none | static cpuManagerPolicy=none | static
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| >= 1.10 |
配置参数： --cpu-manager-policy=none | static cpuManagerPolicy=none | static |
cpuManagerPolicy
可以通过两种方式配置cpu management policy：
- kubelet命令行参数：--cpu-manager-policy=none | static
- KubeletConfiguration：cpuManagerPolicy=none | static
cpu management policy有两种可能的值：
- none：默认配置，通过CFS Quota来管理CPU
- static：针对具有整数型 CPU
requests的GuaranteedPod， 它允许该类 Pod 中的容器访问节点上的独占 CPU 资源
none
static
static模式工作流程大致如下：
static模式下节点的资源要点如下：
- 关于预留：
- 设置cpumanager policy为static时，需要通过kubeReserved、systemReserved预留资源，否则可能出现共享池为空的情况
- 资源池分类：
- 最初时，除预留CPU外，所有CPU均归属到shared pool中，当pod满足整数CPU请求的Guaranteed时，从共享池移除相应资源归属到exclusive CPUs中
- 共享池用于运行BestEffort、Burstable、小数CPU请求的Guaranteed pod
- exclusive CPUs资源池运行整数CPU请求的Guaranteed pod
