Merge pull request #49306 from windsonsea/daemse

[zh] Add create-daemon-set.md

content/zh-cn/docs/tasks/manage-daemon/create-daemon-set.md

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+---
+title: 构建一个基本的 DaemonSet  
+content_type: task  
+weight: 5  
+---
+<!--
+title: Building a Basic DaemonSet  
+content_type: task  
+weight: 5
+-->
+
+<!-- overview -->
+
+<!--
+This page demonstrates how to build a basic {{< glossary_tooltip text="DaemonSet" term_id="daemonset" >}} that runs a Pod on every node in a Kubernetes cluster.
+It covers a simple use case of mounting a file from the host, logging its contents using
+an [init container](/docs/concepts/workloads/pods/init-containers/), and utilizing a pause container.
+-->
+本页演示如何构建一个基本的 {{< glossary_tooltip text="DaemonSet" term_id="daemonset" >}}，
+用其在 Kubernetes 集群中的每个节点上运行 Pod。
+这个简单的使用场景包含了从主机挂载一个文件，使用
+[Init 容器](/zh-cn/docs/concepts/workloads/pods/init-containers/)记录文件的内容，
+以及使用 `pause` 容器。
+
+## {{% heading "prerequisites" %}}
+
+{{< include "task-tutorial-prereqs.md" >}}
+
+<!--
+A Kubernetes cluster with at least two nodes (one control plane node and one worker node) to demonstrate the behavior of DaemonSets.
+-->
+为了演示 DaemonSet 的行为，Kubernetes 集群至少需包含两个节点（一个控制平面节点和一个工作节点）。
+
+<!--
+## Define the DaemonSet
+
+In this task, a basic DaemonSet is created which ensures that the copy of a Pod is scheduled on every node.
+The Pod will use an init container to read and log the contents of `/etc/machine-id` from the host,
+while the main container will be a `pause` container, which keeps the Pod running.
+-->
+## 定义 DaemonSet   {#define-the-daemonset}
+
+在此任务中，将创建一个基本的 DaemonSet，确保 Pod 的副本被调度到每个节点上。
+此 Pod 将使用 Init 容器从主机读取并记录 `/etc/machine-id` 的内容，
+而主容器将是一个 `pause` 容器，用于保持 Pod 运行。
+
+{{% code_sample file="application/basic-daemonset.yaml" %}}
+
+<!--
+1. Create a DaemonSet based on the (YAML) manifest:
+-->
+1. 基于（YAML）清单创建 DaemonSet：
+
+   ```shell
+   kubectl apply -f https://k8s.io/examples/application/basic-daemonset.yaml
+   ```
+
+<!--
+1. Once applied, you can verify that the DaemonSet is running a Pod on every node in the cluster:
+-->
+2. 完成创建操作后，你可以验证 DaemonSet 是否在集群中的每个节点上运行 Pod：
+
+   ```shell
+   kubectl get pods -o wide
+   ```
+
+   <!--
+   The output will list one Pod per node, similar to:
+   -->
+
+   输出将列出每个节点上有一个 Pod，类似于：
+
+   ```
+   NAME                                READY   STATUS    RESTARTS   AGE    IP       NODE
+   example-daemonset-xxxxx             1/1     Running   0          5m     x.x.x.x  node-1
+   example-daemonset-yyyyy             1/1     Running   0          5m     x.x.x.x  node-2
+   ```
+
+<!--
+1. You can inspect the contents of the logged `/etc/machine-id` file by checking the log directory mounted from the host:
+-->
+3. 你可以通过检查从主机挂载的日志目录来查看 `/etc/machine-id` 文件的日志内容：
+
+   ```shell
+   kubectl exec <pod-name> -- cat /var/log/machine-id.log
+   ```
+  
+   <!--
+   Where `<pod-name>` is the name of one of your Pods.
+   -->
+
+   其中 `<pod-name>` 是某一个 Pod 的名称。
+
+## {{% heading "cleanup" %}}
+
+```shell
+kubectl delete --cascade=foreground --ignore-not-found --now daemonsets/example-daemonset
+```
+
+<!--
+This simple DaemonSet example introduces key components like init containers and host path volumes,
+which can be expanded upon for more advanced use cases. For more details refer to
+[DaemonSet](/docs/concepts/workloads/controllers/daemonset/).
+-->
+这个简单的 DaemonSet 例子介绍了 Init 容器和主机路径卷这类关键组件，
+你可以在此基础上扩展以应对更高级的使用场景。有关细节参阅
+[DaemonSet](/zh-cn/docs/concepts/workloads/controllers/daemonset/)。

content/zh-cn/examples/application/basic-daemonset.yaml

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+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: example-daemonset
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: example
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: example
+    spec:
+      containers:
+      - name: pause
+        image: registry.k8s.io/pause
+      initContainers:
+      - name: log-machine-id
+        image: busybox:1.37
+        command: ['sh', '-c', 'cat /etc/machine-id > /var/log/machine-id.log']
+        volumeMounts:
+        - name: machine-id
+          mountPath: /etc/machine-id
+          readOnly: true
+        - name: log-dir
+          mountPath: /var/log
+      volumes:
+      - name: machine-id
+        hostPath:
+          path: /etc/machine-id
+          type: File
+      - name: log-dir
+        hostPath:
+          path: /var/log