52 lines
1.9 KiB
Markdown
52 lines
1.9 KiB
Markdown
---
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title: 亲和性（Affinity）
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id: affinity
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date: 2019-01-11
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full_link: /zh-cn/docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity
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short_description: >
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调度程序用于确定在何处放置 Pod（亲和性）的规则。
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aka:
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tags:
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- fundamental
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---
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<!--
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title: Affinity
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id: affinity
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date: 2019-01-11
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full_link: /docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity
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short_description: >
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Rules used by the scheduler to determine where to place pods
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aka:
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tags:
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- fundamental
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-->
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<!--
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In Kubernetes, _affinity_ is a set of rules that give hints to the scheduler about where to place pods.
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-->
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在 Kubernetes 中 **亲和性（affinity）** 是一组规则，它们为调度程序提供在何处放置 Pod 提示信息。
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<!--more-->
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<!--
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There are two kinds of affinity:
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-->
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亲和性有两种：
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<!--
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* [node affinity](/docs/concepts/scheduling-eviction/assign-pod-node/#node-affinity)
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* [pod-to-pod affinity](/docs/concepts/scheduling-eviction/assign-pod-node/#inter-pod-affinity-and-anti-affinity)
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-->
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* [节点亲和性](/zh-cn/docs/concepts/scheduling-eviction/assign-pod-node/#node-affinity)
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* [Pod 间亲和性](/zh-cn/docs/concepts/scheduling-eviction/assign-pod-node/#inter-pod-affinity-and-anti-affinity)
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<!--
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The rules are defined using the Kubernetes {{< glossary_tooltip term_id="label" text="labels">}},
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and {{< glossary_tooltip term_id="selector" text="selectors">}} specified in {{< glossary_tooltip term_id="pod" text="pods" >}},
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and they can be either required or preferred, depending on how strictly you want the scheduler to enforce them.
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-->
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这些规则是使用 Kubernetes {{< glossary_tooltip term_id="label" text="标签">}}（label）
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和 {{< glossary_tooltip term_id="pod" text="Pod" >}}
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中指定的{{< glossary_tooltip term_id="selector" text="选择算符">}}定义的，
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这些规则可以是必需的或首选的，这取决于你希望调度程序执行它们的严格程度。
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