Merge pull request #20615 from fancc/master

translate Container Environment into chinese

content/zh/docs/concepts/containers/container-environment.md

@@ -0,0 +1,96 @@
+---
+title: 容器环境
+content_template: templates/concept
+weight: 20
+---
+
+{{% capture overview %}}
+
+<!--
+This page describes the resources available to Containers in the Container environment. 
+-->
+本页描述了在容器环境里容器可用的资源。
+
+{{% /capture %}}
+
+
+{{% capture body %}}
+
+<!--
+## Container environment
+
+The Kubernetes Container environment provides several important resources to Containers:
+
+* A filesystem, which is a combination of an [image](/docs/concepts/containers/images/) and one or more [volumes](/docs/concepts/storage/volumes/).
+* Information about the Container itself.
+* Information about other objects in the cluster.
+-->
+## 容器环境
+
+Kubernetes 的容器环境给容器提供了几个重要的资源：
+
+* 文件系统，其中包含一个[镜像](/docs/concepts/containers/images/) 和一个或多个的[卷](/docs/concepts/storage/volumes/)。
+* 容器自身的信息。
+* 集群中其他对象的信息。
+
+<!--
+### Container information
+
+The *hostname* of a Container is the name of the Pod in which the Container is running.
+It is available through the `hostname` command or the
+[`gethostname`](http://man7.org/linux/man-pages/man2/gethostname.2.html)
+function call in libc.
+
+The Pod name and namespace are available as environment variables through the
+[downward API](/docs/tasks/inject-data-application/downward-api-volume-expose-pod-information/).
+
+User defined environment variables from the Pod definition are also available to the Container,
+as are any environment variables specified statically in the Docker image.
+-->
+### 容器信息
+
+容器的 *hostname* 是它所运行在的 pod 的名称。它可以通过 `hostname` 命令或者调用 libc 中的 [`gethostname`](http://man7.org/linux/man-pages/man2/gethostname.2.html) 函数来获取。
+
+Pod 名称和命名空间可以通过 [downward API](/docs/tasks/inject-data-application/downward-api-volume-expose-pod-information/) 使用环境变量。
+
+Pod 定义中的用户所定义的环境变量也可在容器中使用，就像在 Docker 镜像中静态指定的任何环境变量一样。
+
+<!--
+### Cluster information
+
+A list of all services that were running when a Container was created is available to that Container as environment variables.
+Those environment variables match the syntax of Docker links.
+
+For a service named *foo* that maps to a Container named *bar*,
+the following variables are defined:
+-->
+### 集群信息
+
+创建容器时正在运行的所有服务的列表都可用作该容器的环境变量。这些环境变量与 Docker 链接的语法匹配。
+
+对于名为 *foo* 的服务，当映射到名为 *bar* 的容器时，以下变量是被定义了的：
+
+```shell
+FOO_SERVICE_HOST=<the host the service is running on>
+FOO_SERVICE_PORT=<the port the service is running on>
+```
+
+<!--
+Services have dedicated IP addresses and are available to the Container via DNS,
+if [DNS addon](http://releases.k8s.io/{{< param "githubbranch" >}}/cluster/addons/dns/) is enabled. 
+-->
+Service 具有专用的 IP 地址。如果启用了 [DNS插件](http://releases.k8s.io/{{< param "githubbranch" >}}/cluster/addons/dns/)，就可以在容器中通过 DNS 来访问。
+
+{{% /capture %}}
+
+{{% capture whatsnext %}}
+
+<!--
+* Learn more about [Container lifecycle hooks](/docs/concepts/containers/container-lifecycle-hooks/).
+* Get hands-on experience
+  [attaching handlers to Container lifecycle events](/docs/tasks/configure-pod-container/attach-handler-lifecycle-event/).
+-->
+* 学习更多有关[容器生命周期钩子](/docs/concepts/containers/container-lifecycle-hooks/)的知识。
+* 动手获得经验[将处理程序附加到容器生命周期事件](/docs/tasks/configure-pod-container/attach-handler-lifecycle-event/)。
+
+{{% /capture %}}