Switch language name 'zh' to 'zh-cn'

This is the first step to rename 'zh' to 'zh-cn'. There are several reasons why we rename the language name. - The upstream docsy theme changed the language name, leading to many warnings during site build; The side-effect is that the i18n strings are no longer working. - We believe renaming the language is the right thing to do, because this move can make room for other variants of Chinese language, such as 'zh-tw', 'zh-sg' etc. There would be several follow-ups to this PR, such as fixing the intra-site links, adding redirects etc. We will lock up changes to zh/zh-cn pages for the moment, until this one gets in. This PR is based on commit cdad0a7342.
2022-06-10 20:25:27 +08:00
parent 3d345b1816
commit c52818c03d
1347 changed files with 8 additions and 6 deletions
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+---
+title: 为容器设置环境变量
+content_type: task
+weight: 20
+---
+
+<!--
+title: Define Environment Variables for a Container
+content_type: task
+weight: 20
+-->
+
+<!-- overview -->
+
+<!--
+This page shows how to define environment variables for a container
+in a Kubernetes Pod. 
+-->
+本页将展示如何为 kubernetes Pod 下的容器设置环境变量。
+
+## {{% heading "prerequisites" %}}
+
+{{< include "task-tutorial-prereqs.md" >}}
+
+<!-- steps -->
+
+<!--
+## Define an environment variable for a container
+-->
+## 为容器设置一个环境变量
+
+<!--
+When you create a Pod, you can set environment variables for the containers
+that run in the Pod. To set environment variables, include the `env` or
+`envFrom` field in the configuration file.
+-->
+创建 Pod 时，可以为其下的容器设置环境变量。通过配置文件的 `env` 或者 `envFrom` 字段来设置环境变量。
+
+<!--
+In this exercise, you create a Pod that runs one container. The configuration
+file for the Pod defines an environment variable with name `DEMO_GREETING` and
+value `"Hello from the environment"`. Here is the configuration manifest for the
+Pod:
+-->
+本示例中，将创建一个只包含单个容器的 Pod。Pod 的配置文件中设置环境变量的名称为 `DEMO_GREETING`，
+其值为 `"Hello from the environment"`。下面是 Pod 的配置清单：
+
+{{< codenew file="pods/inject/envars.yaml" >}}
+
+<!--
+1. Create a Pod based on that manifest:
+-->
+1. 基于配置清单创建一个 Pod：
+
+    ```shell
+    kubectl apply -f https://k8s.io/examples/pods/inject/envars.yaml
+    ```
+
+<!--
+1. List the running Pods:
+-->
+2. 获取一下当前正在运行的 Pods 信息：
+
+    ```shell
+    kubectl get pods -l purpose=demonstrate-envars
+    ```
+
+    <!--
+    The output is similar to this:
+    -->
+    查询结果应为：
+
+    ```
+    NAME            READY     STATUS    RESTARTS   AGE
+    envar-demo      1/1       Running   0          9s
+    ```
+
+<!--
+1. List the Pod's container environment variables:
+-->
+3. 列出 Pod 容器的环境变量：
+
+    ```shell
+    kubectl exec envar-demo -- printenv
+    ```
+    
+    <!--
+    The output is similar to this:
+    -->
+    打印结果应为：
+
+    ```
+    NODE_VERSION=4.4.2
+    EXAMPLE_SERVICE_PORT_8080_TCP_ADDR=10.3.245.237
+    HOSTNAME=envar-demo
+    ...
+    DEMO_GREETING=Hello from the environment
+    DEMO_FAREWELL=Such a sweet sorrow
+    ```
+
+<!--
+{{< note >}}
+The environment variables set using the `env` or `envFrom` field
+override any environment variables specified in the container image.
+{{< /note >}}
+-->
+{{< note >}}
+通过 `env` 或 `envFrom` 字段设置的环境变量将覆盖容器镜像中指定的所有环境变量。
+{{< /note >}}
+
+<!--
+{{< note >}}
+Environment variables may reference each other, however ordering is important.
+Variables making use of others defined in the same context must come later in
+the list. Similarly, avoid circular references.
+{{< /note >}}
+-->
+{{< note >}}
+环境变量可以互相引用，但是顺序很重要。
+使用在相同上下文中定义的其他变量的变量必须在列表的后面。
+同样，请避免使用循环引用。
+{{< /note >}}
+
+<!--
+## Using environment variables inside of your config
+
+Environment variables that you define in a Pod's configuration can be used
+elsewhere in the configuration, for example in commands and arguments that
+you set for the Pod's containers.
+In the example configuration below, the `GREETING`, `HONORIFIC`, and
+`NAME` environment variables are set to `Warm greetings to`, `The Most
+Honorable`, and `Kubernetes`, respectively. Those environment variables
+are then used in the CLI arguments passed to the `env-print-demo`
+container.
+-->
+## 在配置中使用环境变量
+
+你在 Pod 的配置中定义的环境变量可以在配置的其他地方使用，
+例如可用在为 Pod 的容器设置的命令和参数中。
+在下面的示例配置中，环境变量 `GREETING` ，`HONORIFIC` 和 `NAME` 分别设置为 `Warm greetings to` ，
+`The Most Honorable` 和 `Kubernetes`。然后这些环境变量在传递给容器 `env-print-demo` 的 CLI 参数中使用。
+
+```yaml
+apiVersion: v1
+kind: Pod
+metadata:
+  name: print-greeting
+spec:
+  containers:
+  - name: env-print-demo
+    image: bash
+    env:
+    - name: GREETING
+      value: "Warm greetings to"
+    - name: HONORIFIC
+      value: "The Most Honorable"
+    - name: NAME
+      value: "Kubernetes"
+    command: ["echo"]
+    args: ["$(GREETING) $(HONORIFIC) $(NAME)"]
+```
+
+<!--
+Upon creation, the command `echo Warm greetings to The Most Honorable Kubernetes` is run on the container.
+-->
+创建后，命令 `echo Warm greetings to The Most Honorable Kubernetes` 将在容器中运行。
+
+## {{% heading "whatsnext" %}}
+
+<!--
+* Learn more about [environment variables](/docs/tasks/inject-data-application/environment-variable-expose-pod-information/).
+* Learn about [using secrets as environment variables](/docs/user-guide/secrets/#using-secrets-as-environment-variables).
+* See [EnvVarSource](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#envvarsource-v1-core).
+-->
+
+* 进一步了解[环境变量](/zh/docs/tasks/inject-data-application/environment-variable-expose-pod-information/)
+* 进一步了解[通过环境变量来使用 Secret](/zh/docs/concepts/configuration/secret/#using-secrets-as-environment-variables)
+* 关于 [EnvVarSource](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#envvarsource-v1-core) 资源的信息。
+