[zh] update concept workload pods
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@@ -63,16 +63,21 @@ However, if the Pod has a `restartPolicy` of Never, and an init container fails
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<!--
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To specify an init container for a Pod, add the `initContainers` field into
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the Pod specification, as an array of objects of type
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[Container](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#container-v1-core),
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alongside the app `containers` array.
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the [Pod specification](/docs/reference/kubernetes-api/workload-resources/pod-v1/#PodSpec),
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as an array of `container` items (similar to the app `containers` field and its contents).
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See [Container](/docs/reference/kubernetes-api/workload-resources/pod-v1/#Container) in the
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API reference for more details.
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The status of the init containers is returned in `.status.initContainerStatuses`
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field as an array of the container statuses (similar to the `.status.containerStatuses`
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field).
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-->
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为 Pod 设置 Init 容器需要在 Pod 的 `spec` 中添加 `initContainers` 字段,
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为 Pod 设置 Init 容器需要在 [Pod 规约](/docs/reference/kubernetes-api/workload-resources/pod-v1/#PodSpec)
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中添加 `initContainers` 字段,
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该字段以 [Container](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#container-v1-core)
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类型对象数组的形式组织,和应用的 `containers` 数组同级相邻。
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参阅 API 参考的[容器](/docs/reference/kubernetes-api/workload-resources/pod-v1/#Container)章节了解详情。
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Init 容器的状态在 `status.initContainerStatuses` 字段中以容器状态数组的格式返回
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(类似 `status.containerStatuses` 字段)。
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@@ -458,15 +463,21 @@ Init 容器具有应用容器的所有字段。然而 Kubernetes 禁止使用 `r
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Kubernetes 会在校验时强制执行此检查。
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<!--
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Use `activeDeadlineSeconds` on the Pod and `livenessProbe` on the container to
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prevent init containers from failing forever. The active deadline includes init
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containers.
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Use `activeDeadlineSeconds` on the Pod to prevent init containers from failing forever.
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The active deadline includes init containers.
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However it is recommended to use `activeDeadlineSeconds` if user deploy their application
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as a Job, because `activeDeadlineSeconds` has an effect even after initContainer finished.
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The Pod which is already running correctly would be killed by `activeDeadlineSeconds` if you set.
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The name of each app and init container in a Pod must be unique; a
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validation error is thrown for any container sharing a name with another.
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-->
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在 Pod 上使用 `activeDeadlineSeconds` 和在容器上使用 `livenessProbe` 可以避免
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Init 容器一直重复失败。`activeDeadlineSeconds` 时间包含了 Init 容器启动的时间。
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Init 容器一直重复失败。
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`activeDeadlineSeconds` 时间包含了 Init 容器启动的时间。
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然而,如果用户将他们的应用程序以 Job 方式部署,建议使用 `activeDeadlineSeconds`,
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因为 `activeDeadlineSeconds` 在 Init 容器结束后仍有效果。
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如果你设置了 `activeDeadlineSeconds`,已经在正常运行的 Pod 会被杀死。
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在 Pod 中的每个应用容器和 Init 容器的名称必须唯一;
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与任何其它容器共享同一个名称,会在校验时抛出错误。
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@@ -478,7 +489,8 @@ Given the ordering and execution for init containers, the following rules
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for resource usage apply:
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* The highest of any particular resource request or limit defined on all init
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containers is the *effective init request/limit*
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containers is the *effective init request/limit*. If any resource has no
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resource limit specified this is considered as the highest limit.
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* The Pod's *effective request/limit* for a resource is the higher of:
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* the sum of all app containers request/limit for a resource
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* the effective init request/limit for a resource
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@@ -492,7 +504,8 @@ for resource usage apply:
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在给定的 Init 容器执行顺序下,资源使用适用于如下规则:
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* 所有 Init 容器上定义的任何特定资源的 limit 或 request 的最大值,作为 Pod *有效初始 request/limit*
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* 所有 Init 容器上定义的任何特定资源的 limit 或 request 的最大值,作为 Pod *有效初始 request/limit*。
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如果任何资源没有指定资源限制,这被视为最高限制。
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* Pod 对资源的 *有效 limit/request* 是如下两者的较大者:
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* 所有应用容器对某个资源的 limit/request 之和
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* 对某个资源的有效初始 limit/request
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