187 lines
5.2 KiB
Markdown
187 lines
5.2 KiB
Markdown
---
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title: 用节点亲和性把 Pods 分配到节点
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min-kubernetes-server-version: v1.10
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content_type: task
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weight: 120
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---
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<!--
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title: Assign Pods to Nodes using Node Affinity
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min-kubernetes-server-version: v1.10
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content_type: task
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weight: 120
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-->
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<!-- overview -->
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<!--
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This page shows how to assign a Kubernetes Pod to a particular node using Node Affinity in a
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Kubernetes cluster.
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-->
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本页展示在 Kubernetes 集群中，如何使用节点亲和性把 Kubernetes Pod 分配到特定节点。
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## {{% heading "prerequisites" %}}
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{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
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<!-- steps -->
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<!--
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## Add a label to a node
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1. List the nodes in your cluster, along with their labels:
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-->
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## 给节点添加标签
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1. 列出集群中的节点及其标签：
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```shell
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kubectl get nodes --show-labels
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```
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<!--
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The output is similar to this:
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-->
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输出类似于此：
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```
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NAME STATUS ROLES AGE VERSION LABELS
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worker0 Ready <none> 1d v1.13.0 ...,kubernetes.io/hostname=worker0
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worker1 Ready <none> 1d v1.13.0 ...,kubernetes.io/hostname=worker1
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worker2 Ready <none> 1d v1.13.0 ...,kubernetes.io/hostname=worker2
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```
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<!--
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1. Chose one of your nodes, and add a label to it:
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-->
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1. 选择一个节点，给它添加一个标签：
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```shell
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kubectl label nodes <your-node-name> disktype=ssd
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```
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<!--
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where `<your-node-name>` is the name of your chosen node.
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1. Verify that your chosen node has a `disktype=ssd` label:
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-->
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其中 `<your-node-name>` 是你所选节点的名称。
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2. 验证你所选节点具有 `disktype=ssd` 标签：
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```shell
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kubectl get nodes --show-labels
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```
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<!--
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The output is similar to this:
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-->
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输出类似于此：
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```
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NAME STATUS ROLES AGE VERSION LABELS
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worker0 Ready <none> 1d v1.13.0 ...,disktype=ssd,kubernetes.io/hostname=worker0
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worker1 Ready <none> 1d v1.13.0 ...,kubernetes.io/hostname=worker1
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worker2 Ready <none> 1d v1.13.0 ...,kubernetes.io/hostname=worker2
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```
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<!--
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In the preceding output, you can see that the `worker0` node has a
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`disktype=ssd` label.
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-->
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在前面的输出中，可以看到 `worker0` 节点有一个 `disktype=ssd` 标签。
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<!--
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## Schedule a Pod using required node affinity
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This manifest describes a Pod that has a `requiredDuringSchedulingIgnoredDuringExecution` node affinity,`disktype: ssd`.
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This means that the pod will get scheduled only on a node that has a `disktype=ssd` label.
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-->
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## 依据强制的节点亲和性调度 Pod {#schedule-a-Pod-using-required-node-affinity}
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下面清单描述了一个 Pod，它有一个节点亲和性配置 `requiredDuringSchedulingIgnoredDuringExecution`，`disktype=ssd`。
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这意味着 pod 只会被调度到具有 `disktype=ssd` 标签的节点上。
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{{< codenew file="pods/pod-nginx-required-affinity.yaml" >}}
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<!--
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1. Apply the manifest to create a Pod that is scheduled onto your
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chosen node:
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-->
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1. 执行（Apply）此清单来创建一个调度到所选节点上的 Pod：
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```shell
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kubectl apply -f https://k8s.io/examples/pods/pod-nginx-required-affinity.yaml
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```
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<!--
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1. Verify that the pod is running on your chosen node:
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-->
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1. 验证 pod 已经在所选节点上运行：
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```shell
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kubectl get pods --output=wide
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```
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<!--
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The output is similar to this:
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-->
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输出类似于此：
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```
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NAME READY STATUS RESTARTS AGE IP NODE
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nginx 1/1 Running 0 13s 10.200.0.4 worker0
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```
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<!--
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## Schedule a Pod using preferred node affinity
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This manifest describes a Pod that has a `preferredDuringSchedulingIgnoredDuringExecution` node affinity,`disktype: ssd`.
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This means that the pod will prefer a node that has a `disktype=ssd` label.
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-->
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## 使用首选的节点亲和性调度 Pod {#schedule-a-Pod-using-preferred-node-affinity}
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本清单描述了一个Pod，它有一个节点亲和性设置 `preferredDuringSchedulingIgnoredDuringExecution`，`disktype: ssd`。
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这意味着 pod 将首选具有 `disktype=ssd` 标签的节点。
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{{< codenew file="pods/pod-nginx-preferred-affinity.yaml" >}}
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<!--
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1. Apply the manifest to create a Pod that is scheduled onto your
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chosen node:
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-->
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1. 执行此清单创建一个会调度到所选节点上的 Pod：
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```shell
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kubectl apply -f https://k8s.io/examples/pods/pod-nginx-preferred-affinity.yaml
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```
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<!--
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1. Verify that the pod is running on your chosen node:
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-->
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1. 验证 pod 是否在所选节点上运行：
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```shell
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kubectl get pods --output=wide
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```
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<!--
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The output is similar to this:
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-->
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输出类似于此：
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```
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NAME READY STATUS RESTARTS AGE IP NODE
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nginx 1/1 Running 0 13s 10.200.0.4 worker0
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```
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## {{% heading "whatsnext" %}}
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<!--
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Learn more about
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[Node Affinity](/docs/concepts/scheduling-eviction/assign-pod-node/#node-affinity).
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-->
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进一步了解
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[节点亲和性](/zh/docs/concepts/scheduling-eviction/assign-pod-node/#node-affinity).
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