[zh] sync tasks/manage-daemon/pods-some-nodes.md

content/zh-cn/docs/tasks/manage-daemon/pods-some-nodes.md

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+---
+title: 仅在某些节点上运行 Pod
+content_type: task
+weight: 30
+---
+<!--
+title: Running Pods on Only Some Nodes
+content_type: task
+weight: 30
+-->
+
+<!-- overview -->
+
+<!--
+This page demonstrates how can you run {{<glossary_tooltip term_id="pod" text="Pods">}} on only some {{<glossary_tooltip term_id="node" text="Nodes">}} as part of a {{<glossary_tooltip term_id="daemonset" text="DaemonSet">}}
+-->
+本页演示了你如何能够仅在某些{{<glossary_tooltip term_id="node" text="节点">}}上作为
+{{<glossary_tooltip term_id="daemonset" text="DaemonSet">}}
+的一部分运行{{<glossary_tooltip term_id="pod" text="Pod">}}。
+
+## {{% heading "prerequisites" %}}
+
+{{< include "task-tutorial-prereqs.md" >}}
+
+<!--
+## Running Pods on only some Nodes
+
+Imagine that you want to run a {{<glossary_tooltip term_id="daemonset" text="DaemonSet">}}, but you only need to run those daemon pods
+on nodes that have local solid state (SSD) storage. For example, the Pod might provide cache service to the
+node, and the cache is only useful when low-latency local storage is available.
+-->
+## 仅在某些节点上运行 Pod    {#running-pod-on-some-nodes}
+
+设想一下你想要运行 {{<glossary_tooltip term_id="daemonset" text="DaemonSet">}}，
+但你只需要在配备了本地固态 (SSD) 存储的节点上运行这些守护进程 Pod。
+例如，Pod 可以向节点提供缓存服务，而缓存仅在低延迟本地存储可用时才有用。
+
+<!--
+### Step 1: Add labels to your nodes
+
+Add the label `ssd=true` to the nodes which have SSDs.
+-->
+### 第 1 步：为节点打标签
+
+在配有 SSD 的节点上打标签 `ssd=true`。
+
+```shell
+kubectl label nodes example-node-1 example-node-2 ssd=true
+```
+
+<!--
+### Step 2: Create the manifest
+
+Let's create a {{<glossary_tooltip term_id="daemonset" text="DaemonSet">}} which will provision the daemon pods on the SSD labeled {{<glossary_tooltip term_id="node" text="nodes">}} only.
+
+Next, use a `nodeSelector` to ensure that the DaemonSet only runs Pods on nodes
+with the `ssd` label set to `"true"`.
+-->
+### 第 2 步：创建清单
+
+让我们创建一个 {{<glossary_tooltip term_id="daemonset" text="DaemonSet">}}，
+它将仅在打了 SSD 标签的{{<glossary_tooltip term_id="node" text="节点">}}上制备守护进程 Pod。
+
+接下来，使用 `nodeSelector` 确保 DaemonSet 仅在 `ssd` 标签设为 `"true"` 的节点上运行 Pod。
+
+{{<codenew file="controllers/daemonset-label-selector.yaml">}}
+
+<!--
+### Step 3: Create the DaemonSet
+
+Create the DaemonSet from the manifest by using `kubectl create` or `kubectl apply`
+
+Let's label another node as `ssd=true`.
+-->
+### 第 3 步：创建 DaemonSet
+
+使用 `kubectl create` 或 `kubectl apply` 从清单创建 DaemonSet。
+
+让我们为另一个节点打上标签 `ssd=true`。
+
+```shell
+kubectl label nodes example-node-3 ssd=true
+```
+
+<!--
+Labelling the node automatically triggers the control plane (specifically, the DaemonSet controller)
+to run a new daemon pod on that node.
+-->
+节点打上标签后将自动触发控制平面（具体而言是 DaemonSet 控制器）在该节点上运行新的守护进程 Pod。
+
+```shell
+kubectl get pods -o wide
+```
+
+<!--
+The output is similar to:
+-->
+输出类似于：
+
+```console
+NAME                              READY     STATUS    RESTARTS   AGE    IP      NODE
+<daemonset-name><some-hash-01>    1/1       Running   0          13s    .....   example-node-1
+<daemonset-name><some-hash-02>    1/1       Running   0          13s    .....   example-node-2
+<daemonset-name><some-hash-03>    1/1       Running   0          5s     .....   example-node-3
+```

content/zh-cn/examples/controllers/daemonset-label-selector.yaml

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+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: ssd-driver
+  labels:
+    app: nginx
+spec:
+  selector:
+    matchLabels:
+      app: ssd-driver-pod
+  template:
+    metadata:
+      labels:
+        app: ssd-driver-pod
+    spec:
+      nodeSelector:
+        ssd: "true"
+      containers:
+        - name: example-container
+          image: example-image