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‎content/zh/docs/reference/scheduling/_index.md

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---
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title: 调度
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weight: 70
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toc-hide: true
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---

‎content/zh/docs/reference/scheduling/policies.md

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---
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title: 调度策略
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content_type: concept
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weight: 10
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---
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<!--
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title: Scheduling Policies
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content_type: concept
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weight: 10
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-->
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<!-- overview -->
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<!--
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A scheduling Policy can be used to specify the *predicates* and *priorities*
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that the {{< glossary_tooltip text="kube-scheduler" term_id="kube-scheduler" >}}
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runs to [filter and score nodes](/docs/concepts/scheduling-eviction/kube-scheduler/#kube-scheduler-implementation),
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respectively.
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-->
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{{< glossary_tooltip text="kube-scheduler" term_id="kube-scheduler" >}}
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根据调度策略指定的*断言（predicates）*和*优先级（priorities）*
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分别对节点进行[过滤和打分](/zh/docs/concepts/scheduling-eviction/kube-scheduler/#kube-scheduler-implementation)。
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<!--
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You can set a scheduling policy by running
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`kube-scheduler --policy-config-file <filename>` or
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`kube-scheduler --policy-configmap <ConfigMap>`
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and using the [Policy type](https://pkg.go.dev/k8s.io/[email protected]/config/v1?tab=doc#Policy).
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-->
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你可以通过执行 `kube-scheduler --policy-config-file <filename>` 或
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`kube-scheduler --policy-configmap <ConfigMap>`
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设置并使用[调度策略](https://pkg.go.dev/k8s.io/[email protected]/config/v1?tab=doc#Policy)。
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<!-- body -->
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<!-- ## Predicates -->
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## 断言 {#predicates}
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<!-- The following *predicates* implement filtering: -->
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以下*断言*实现了过滤接口：
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<!--
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- `PodFitsHostPorts`: Checks if a Node has free ports (the network protocol kind)
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for the Pod ports the Pod is requesting.
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-->
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- `PodFitsHostPorts`：检查 Pod 请求的端口（网络协议类型）在节点上是否可用。
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<!-- - `PodFitsHost`: Checks if a Pod specifies a specific Node by its hostname. -->
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- `PodFitsHost`：检查 Pod 是否通过主机名指定了 Node。
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<!--
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- `PodFitsResources`: Checks if the Node has free resources (eg, CPU and Memory)
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to meet the requirement of the Pod.
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-->
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- `PodFitsResources`：检查节点的空闲资源（例如，CPU和内存）是否满足 Pod 的要求。
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<!--
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- `MatchNodeSelector`: Checks if a Pod's Node {{< glossary_tooltip term_id="selector" >}}
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matches the Node's {{< glossary_tooltip text="label(s)" term_id="label" >}}.
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-->
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- `MatchNodeSelector`：检查 Pod 的节点{{< glossary_tooltip text="选择算符" term_id="selector" >}}
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和节点的 {{< glossary_tooltip text="标签" term_id="label" >}} 是否匹配。
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<!--
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- `NoVolumeZoneConflict`: Evaluate if the {{< glossary_tooltip text="Volumes" term_id="volume" >}}
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that a Pod requests are available on the Node, given the failure zone restrictions for
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that storage.
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-->
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- `NoVolumeZoneConflict`：给定该存储的故障区域限制，
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评估 Pod 请求的{{< glossary_tooltip text="卷" term_id="volume" >}}在节点上是否可用。
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<!--
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- `NoDiskConflict`: Evaluates if a Pod can fit on a Node due to the volumes it requests,
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and those that are already mounted.
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-->
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- `NoDiskConflict`：根据 Pod 请求的卷是否在节点上已经挂载，评估 Pod 和节点是否匹配。
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<!--
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- `MaxCSIVolumeCount`: Decides how many {{< glossary_tooltip text="CSI" term_id="csi" >}}
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volumes should be attached, and whether that's over a configured limit.
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-->
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- `MaxCSIVolumeCount`：决定附加 {{< glossary_tooltip text="CSI" term_id="csi" >}} 卷的数量，判断是否超过配置的限制。
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<!--
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- `CheckNodeMemoryPressure`: If a Node is reporting memory pressure, and there's no
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configured exception, the Pod won't be scheduled there.
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-->
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- `CheckNodeMemoryPressure`：如果节点正上报内存压力，并且没有异常配置，则不会把 Pod 调度到此节点上。
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<!--
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- `CheckNodePIDPressure`: If a Node is reporting that process IDs are scarce, and
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there's no configured exception, the Pod won't be scheduled there.
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-->
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- `CheckNodePIDPressure`：如果节点正上报进程 ID 稀缺，并且没有异常配置，则不会把 Pod 调度到此节点上。
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<!--
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- `CheckNodeDiskPressure`: If a Node is reporting storage pressure (a filesystem that
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is full or nearly full), and there's no configured exception, the Pod won't be
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scheduled there.
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-->
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- `CheckNodeDiskPressure`：如果节点正上报存储压力（文件系统已满或几乎已满），并且没有异常配置，则不会把 Pod 调度到此节点上。
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<!--
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- `CheckNodeCondition`: Nodes can report that they have a completely full filesystem,
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that networking isn't available or that kubelet is otherwise not ready to run Pods.
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If such a condition is set for a Node, and there's no configured exception, the Pod
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won't be scheduled there.
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-->
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- `CheckNodeCondition`：节点可用上报自己的文件系统已满，网络不可用或者 kubelet 尚未准备好运行 Pod。
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如果节点上设置了这样的状况，并且没有异常配置，则不会把 Pod 调度到此节点上。
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<!--
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- `PodToleratesNodeTaints`: checks if a Pod's {{< glossary_tooltip text="tolerations" term_id="toleration" >}}
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can tolerate the Node's {{< glossary_tooltip text="taints" term_id="taint" >}}.
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-->
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- `PodToleratesNodeTaints`：检查 Pod 的{{< glossary_tooltip text="容忍" term_id="toleration" >}}
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是否能容忍节点的{{< glossary_tooltip text="污点" term_id="taint" >}}。
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<!--
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- `CheckVolumeBinding`: Evaluates if a Pod can fit due to the volumes it requests.
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This applies for both bound and unbound
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{{< glossary_tooltip text="PVCs" term_id="persistent-volume-claim" >}}.
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-->
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- `CheckVolumeBinding`：基于 Pod 的卷请求，评估 Pod 是否适合节点，这里的卷包括绑定的和未绑定的
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{{< glossary_tooltip text="PVCs" term_id="persistent-volume-claim" >}} 都适用。
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<!-- ## Priorities -->
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## 优先级 {#priorities}
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<!-- The following *priorities* implement scoring: -->
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以下*优先级*实现了打分接口：
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<!--
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- `SelectorSpreadPriority`: Spreads Pods across hosts, considering Pods that
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belong to the same {{< glossary_tooltip text="Service" term_id="service" >}},
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{{< glossary_tooltip term_id="statefulset" >}} or
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{{< glossary_tooltip term_id="replica-set" >}}.
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-->
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- `SelectorSpreadPriority`：属于同一 {{< glossary_tooltip text="Service" term_id="service" >}}、
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{{< glossary_tooltip term_id="statefulset" >}} 或
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{{< glossary_tooltip term_id="replica-set" >}} 的 Pod，跨主机部署。
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<!--
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- `InterPodAffinityPriority`: Implements preferred
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[inter pod affininity and antiaffinity](/docs/concepts/scheduling-eviction/assign-pod-node/#inter-pod-affinity-and-anti-affinity).
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-->
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- `InterPodAffinityPriority`：实现了 [Pod 间亲和性与反亲和性](/zh/docs/concepts/scheduling-eviction/assign-pod-node/#inter-pod-affinity-and-anti-affinity)的优先级。
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<!--
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- `LeastRequestedPriority`: Favors nodes with fewer requested resources. In other
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words, the more Pods that are placed on a Node, and the more resources those
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Pods use, the lower the ranking this policy will give.
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-->
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- `LeastRequestedPriority`：偏向最少请求资源的节点。
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换句话说，节点上的 Pod 越多，使用的资源就越多，此策略给出的排名就越低。
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<!--
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- `MostRequestedPriority`: Favors nodes with most requested resources. This policy
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will fit the scheduled Pods onto the smallest number of Nodes needed to run your
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overall set of workloads.
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-->
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- `MostRequestedPriority`：支持最多请求资源的节点。
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该策略将 Pod 调度到整体工作负载所需的最少的一组节点上。
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<!-- - `RequestedToCapacityRatioPriority`: Creates a requestedToCapacity based ResourceAllocationPriority using default resource scoring function shape. -->
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- `RequestedToCapacityRatioPriority`：使用默认的打分方法模型，创建基于 ResourceAllocationPriority 的 requestedToCapacity。
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<!-- - `BalancedResourceAllocation`: Favors nodes with balanced resource usage. -->
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- `BalancedResourceAllocation`：偏向平衡资源使用的节点。
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<!--
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- `NodePreferAvoidPodsPriority`: Prioritizes nodes according to the node annotation
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`scheduler.alpha.kubernetes.io/preferAvoidPods`. You can use this to hint that
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two different Pods shouldn't run on the same Node.
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-->
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- `NodePreferAvoidPodsPriority`：根据节点的注解 `scheduler.alpha.kubernetes.io/preferAvoidPods` 对节点进行优先级排序。
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你可以使用它来暗示两个不同的 Pod 不应在同一节点上运行。
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<!--
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- `NodeAffinityPriority`: Prioritizes nodes according to node affinity scheduling
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preferences indicated in PreferredDuringSchedulingIgnoredDuringExecution.
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You can read more about this in [Assigning Pods to Nodes](/docs/concepts/scheduling-eviction/assign-pod-node/).
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-->
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- `NodeAffinityPriority`：根据节点亲和中 PreferredDuringSchedulingIgnoredDuringExecution 字段对节点进行优先级排序。
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你可以在[将 Pod 分配给节点](/zh/docs/concepts/scheduling-eviction/assign-pod-node/)中了解更多。
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<!--
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- `TaintTolerationPriority`: Prepares the priority list for all the nodes, based on
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the number of intolerable taints on the node. This policy adjusts a node's rank
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taking that list into account.
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-->
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- `TaintTolerationPriority`：根据节点上无法忍受的污点数量，给所有节点进行优先级排序。
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此策略会根据排序结果调整节点的等级。
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<!--
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- `ImageLocalityPriority`: Favors nodes that already have the
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{{< glossary_tooltip text="container images" term_id="image" >}} for that
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Pod cached locally.
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-->
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- `ImageLocalityPriority`：偏向已在本地缓存 Pod 所需容器镜像的节点。
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<!--
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- `ServiceSpreadingPriority`: For a given Service, this policy aims to make sure that
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the Pods for the Service run on different nodes. It favours scheduling onto nodes
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that don't have Pods for the service already assigned there. The overall outcome is
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that the Service becomes more resilient to a single Node failure.
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-->
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- `ServiceSpreadingPriority`：对于给定的 Service，此策略旨在确保该 Service 关联的 Pod 在不同的节点上运行。
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它偏向把 Pod 调度到没有该服务的节点。
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整体来看，Service 对于单个节点故障变得更具弹性。
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<!-- - `EqualPriority`: Gives an equal weight of one to all nodes. -->
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- `EqualPriority`：给予所有节点相等的权重。
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<!--
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- `EvenPodsSpreadPriority`: Implements preferred
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[pod topology spread constraints](/docs/concepts/workloads/pods/pod-topology-spread-constraints/).
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-->
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- `EvenPodsSpreadPriority`：实现了 [Pod 拓扑扩展约束](/zh/docs/concepts/workloads/pods/pod-topology-spread-constraints/)的优先级排序。
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## {{% heading "whatsnext" %}}
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<!--
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* Learn about [scheduling](/docs/concepts/scheduling-eviction/kube-scheduler/)
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* Learn about [kube-scheduler Configuration](/docs/reference/scheduling/config/)
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-->
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* 了解[调度](/zh/docs/concepts/scheduling-eviction/kube-scheduler/)
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* 了解 [kube-scheduler 配置](/zh/docs/reference/scheduling/config/)

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