diff --git a/content/zh-cn/docs/concepts/configuration/manage-resources-containers.md b/content/zh-cn/docs/concepts/configuration/manage-resources-containers.md index 8f2d617886..e4be3e9a18 100644 --- a/content/zh-cn/docs/concepts/configuration/manage-resources-containers.md +++ b/content/zh-cn/docs/concepts/configuration/manage-resources-containers.md @@ -14,7 +14,7 @@ title: Resource Management for Pods and Containers content_type: concept weight: 40 feature: - title: Automatic binpacking + title: Automatic bin packing description: > Automatically places containers based on their resource requirements and other constraints, while not sacrificing availability. Mix critical and best-effort workloads in order to drive up utilization and save even more resources. @@ -155,7 +155,7 @@ Kubernetes API 服务器读取和修改的对象。 For each container, you can specify resource limits and requests, including the following: --> -## Pod 和 容器的资源请求和约束 +## Pod 和 容器的资源请求和约束 {#resource-requests-and-limits-of-pod-and-container} 针对每个容器，你都可以指定其资源约束和请求，包括如下选项： @@ -170,7 +170,6 @@ including the following: Although you can only specify requests and limits for individual containers, it is also useful to think about the overall resource requests and limits for a Pod. -A For a particular resource, a *Pod resource request/limit* is the sum of the resource requests/limits of that type for each container in the Pod. --> @@ -184,7 +183,7 @@ resource requests/limits of that type for each container in the Pod. Limits and requests for CPU resources are measured in *cpu* units. In Kubernetes, 1 CPU unit is equivalent to **1 physical CPU core**, -or **1 virtual core**, depending on whether the node is a physical host +or **1 virtual core**, depending on whether the node is a physical host or a virtual machine running inside a physical machine. --> ## Kubernetes 中的资源单位 {#resource-units-in-kubernetes} @@ -316,7 +315,7 @@ a Pod on a node if the capacity check fails. This protects against a resource shortage on a node when resource usage later increases, for example, during a daily peak in request rate. --> -## 带资源请求的 Pod 如何调度 +## 带资源请求的 Pod 如何调度 {#how-pods-with-resource-limits-are-run} 当你创建一个 Pod 时，Kubernetes 调度程序将为 Pod 选择一个节点。 每个节点对每种资源类型都有一个容量上限：可为 Pod 提供的 CPU 和内存量。 @@ -328,7 +327,7 @@ daily peak in request rate. ## Kubernetes 应用资源请求与约束的方式 {#how-pods-with-resource-limits-are-run} -当 kubelet 启动 Pod 中的容器时，它会将容器的 CPU 和内存请求与约束信息传递给容器运行时。 +当 kubelet 将容器作为 Pod 的一部分启动时，它会将容器的 CPU 和内存请求与约束信息传递给容器运行时。 在 Linux 系统上，容器运行时通常会配置内核 {{< glossary_tooltip text="CGroups" term_id="cgroup" >}}，负责应用并实施所定义的请求。 @@ -414,7 +413,7 @@ are available in your cluster, then Pod resource usage can be retrieved either from the [Metrics API](/docs/tasks/debug/debug-cluster/resource-metrics-pipeline/#metrics-api) directly or from your monitoring tools. --> -## 监控计算和内存资源用量 +## 监控计算和内存资源用量 {#monitoring-compute-memory-resource-usage} kubelet 会将 Pod 的资源使用情况作为 Pod [`status`](/zh-cn/docs/concepts/overview/working-with-objects/kubernetes-objects/#object-spec-and-status) @@ -433,7 +432,7 @@ locally-attached writeable devices or, sometimes, by RAM. Pods use ephemeral local storage for scratch space, caching, and for logs. The kubelet can provide scratch space to Pods using local ephemeral storage to -mount [`emptyDir`](https://kubernetes.io/docs/concepts/storage/volumes/#emptydir) +mount [`emptyDir`](/docs/concepts/storage/volumes/#emptydir) {{< glossary_tooltip term_id="volume" text="volumes" >}} into containers. --> ## 本地临时存储 {#local-ephemeral-storage} @@ -490,7 +489,7 @@ The kubelet also writes [node-level container logs](/docs/concepts/cluster-administration/logging/#logging-at-the-node-level) and treats these similarly to ephemeral local storage. --> -### 本地临时性存储的配置 +### 本地临时性存储的配置 {##configurations-for-local-ephemeral-storage} Kubernetes 有两种方式支持节点上配置本地临时性存储： @@ -606,12 +605,12 @@ container of a Pod can specify either or both of the following: * `spec.containers[].resources.limits.ephemeral-storage` * `spec.containers[].resources.requests.ephemeral-storage` -Limits and requests for `ephemeral-storage` are measured in quantities. +Limits and requests for `ephemeral-storage` are measured in byte quantities. You can express storage as a plain integer or as a fixed-point number using one of these suffixes: -E, P, T, G, M, K. You can also use the power-of-two equivalents: Ei, Pi, Ti, Gi, -Mi, Ki. For example, the following represent roughly the same value: +E, P, T, G, M, k. You can also use the power-of-two equivalents: Ei, Pi, Ti, Gi, +Mi, Ki. For example, the following quantities all represent roughly the same value: --> -### 为本地临时性存储设置请求和约束值 +### 为本地临时性存储设置请求和约束值 {#setting-requests-and-limits-for-local-ephemeral-storage} 你可以使用 `ephemeral-storage` 来管理本地临时性存储。 Pod 中的每个容器可以设置以下属性： @@ -620,7 +619,7 @@ Pod 中的每个容器可以设置以下属性： * `spec.containers[].resources.requests.ephemeral-storage` `ephemeral-storage` 的请求和约束值是按量纲计量的。你可以使用一般整数或者定点数字 -加上下面的后缀来表达存储量：E、P、T、G、M、K。 +加上下面的后缀来表达存储量：E、P、T、G、M、k。 你也可以使用对应的 2 的幂级数来表达：Ei、Pi、Ti、Gi、Mi、Ki。 例如，下面的表达式所表达的大致是同一个值： @@ -641,8 +640,8 @@ or 400 megabytes (`400M`). 在下面的例子中，Pod 包含两个容器。每个容器请求 2 GiB 大小的本地临时性存储。 @@ -692,7 +691,7 @@ For more information, see The scheduler ensures that the sum of the resource requests of the scheduled containers is less than the capacity of the node. --> -### 带临时性存储的 Pods 的调度行为 +### 带临时性存储的 Pods 的调度行为 {#how-pods-with-ephemeral-storage-requests-are-scheduled} 当你创建一个 Pod 时，Kubernetes 调度器会为 Pod 选择一个节点来运行之。 每个节点都有一个本地临时性存储的上限，是其可提供给 Pods 使用的总量。 @@ -870,6 +869,7 @@ If you want to use project quotas, you should: has project quotas enabled. All XFS filesystems support project quotas. For ext4 filesystems, you need to enable the project quota tracking feature while the filesystem is not mounted. + ```bash # For ext4, with /dev/block-device not mounted sudo tune2fs -O project -Q prjquota /dev/block-device @@ -962,11 +962,11 @@ asynchronously by the kubelet. kubelet 会异步地对 `status.allocatable` 字段执行自动更新操作，使之包含新资源。 由于调度器在评估 Pod 是否适合在某节点上执行时会使用节点的 `status.allocatable` 值， 调度器只会考虑异步更新之后的新值。 @@ -997,6 +997,7 @@ http://k8s-master:8080/api/v1/nodes/k8s-node-1/status In the preceding request, `~1` is the encoding for the character `/` in the patch path. The operation path value in JSON-Patch is interpreted as a JSON-Pointer. For more details, see +[IETF RFC 6901, section 3](https://tools.ietf.org/html/rfc6901#section-3). {{< /note >}} --> {{< note >}} @@ -1013,14 +1014,14 @@ Cluster-level extended resources are not tied to nodes. They are usually managed by scheduler extenders, which handle the resource consumption and resource quota. You can specify the extended resources that are handled by scheduler extenders -in [scheduler policy configuration](/docs/reference/config-api/kube-scheduler-config.v1beta3/) +in [scheduler configuration](/docs/reference/config-api/kube-scheduler-config.v1beta3/) --> #### 集群层面的扩展资源 {#cluster-level-extended-resources} 集群层面的扩展资源并不绑定到具体节点。 它们通常由调度器扩展程序（Scheduler Extenders）管理，这些程序处理资源消耗和资源配额。 -你可以在[调度器策略配置](/zh-cn/docs/reference/config-api/kube-scheduler-config.v1beta3/) +你可以在[调度器配置](/zh-cn/docs/reference/config-api/kube-scheduler-config.v1beta3/) 中指定由调度器扩展程序处理的扩展资源。 -## 疑难解答 +## 疑难解答 {#troubleshooting} -### 我的 Pod 处于悬决状态且事件信息显示 `FailedScheduling` +### 我的 Pod 处于悬决状态且事件信息显示 `FailedScheduling` {#my-pods-are-pending-with-event-message-failedscheduling} 如果调度器找不到该 Pod 可以匹配的任何节点，则该 Pod 将保持未被调度状态， 直到找到一个可以被调度到的位置。每当调度器找不到 Pod 可以调度的地方时， @@ -1240,22 +1241,22 @@ Allocated resources: (Total limits may be over 100 percent, i.e., overcommitted.) CPU Requests CPU Limits Memory Requests Memory Limits ------------ ---------- --------------- ------------- - 680m (34%) 400m (20%) 920Mi (12%) 1070Mi (14%) + 680m (34%) 400m (20%) 920Mi (11%) 1070Mi (13%) ``` -在上面的输出中，你可以看到如果 Pod 请求超过 1120m CPU 或者 6.23Gi 内存，节点将无法满足。 +在上面的输出中，你可以看到如果 Pod 请求超过 1.120 CPU 或者 6.23Gi 内存，节点将无法满足。 通过查看 "Pods" 部分，你将看到哪些 Pod 占用了节点上的资源。 你可以配置[资源配额](/zh-cn/docs/concepts/policy/resource-quotas/)功能特性以限制每个名字空间可以使用的资源总量。 当某名字空间中存在 ResourceQuota 时，Kubernetes 会在该名字空间中的对象强制实施配额。 @@ -1305,7 +1306,7 @@ whether a Container is being killed because it is hitting a resource limit, call `kubectl describe pod` on the Pod of interest: --> -### 我的容器被终止了 +### 我的容器被终止了 {#my-container-is-terminated} 你的容器可能因为资源紧张而被终止。要查看容器是否因为遇到资源限制而被杀死， 请针对相关的 Pod 执行 `kubectl describe pod`： @@ -1331,18 +1332,19 @@ Message: IP: 10.244.2.75 Containers: simmemleak: - Image: saadali/simmemleak + Image: saadali/simmemleak:latest Limits: - cpu: 100m - memory: 50Mi - State: Running - Started: Tue, 07 Jul 2015 12:54:41 -0700 - Last Termination State: Terminated - Exit Code: 1 - Started: Fri, 07 Jul 2015 12:54:30 -0700 - Finished: Fri, 07 Jul 2015 12:54:33 -0700 - Ready: False - Restart Count: 5 + cpu: 100m + memory: 50Mi + State: Running + Started: Tue, 07 Jul 2019 12:54:41 -0700 + Last State: Terminated + Reason: OOMKilled + Exit Code: 137 + Started: Fri, 07 Jul 2019 12:54:30 -0700 + Finished: Fri, 07 Jul 2019 12:54:33 -0700 + Ready: False + Restart Count: 5 Conditions: Type Status Ready False @@ -1381,13 +1383,13 @@ memory limit (and possibly request) for that container. * Get hands-on experience [assigning CPU resources to containers and Pods](/docs/tasks/configure-pod-container/assign-cpu-resource/). * Read how the API reference defines a [container](/docs/reference/kubernetes-api/workload-resources/pod-v1/#Container) and its [resource requirements](/docs/reference/kubernetes-api/workload-resources/pod-v1/#resources) -* Read about [project quotas](https://xfs.org/docs/xfsdocs-xml-dev/XFS_User_Guide/tmp/en-US/html/xfs-quotas.html) in XFS +* Read about [project quotas](https://xfs.org/index.php/XFS_FAQ#Q:_Quota:_Do_quotas_work_on_XFS.3F) in XFS * Read more about the [kube-scheduler configuration reference (v1beta3)](/docs/reference/config-api/kube-scheduler-config.v1beta3/) --> * 获取[分配内存资源给容器和 Pod ](/zh-cn/docs/tasks/configure-pod-container/assign-memory-resource/) 的实践经验 * 获取[分配 CPU 资源给容器和 Pod ](/zh-cn/docs/tasks/configure-pod-container/assign-cpu-resource/) 的实践经验 * 阅读 API 参考中 [Container](/zh-cn/docs/reference/kubernetes-api/workload-resources/pod-v1/#Container) 和其[资源请求](/zh-cn/docs/reference/kubernetes-api/workload-resources/pod-v1/#resources)定义。 -* 阅读 XFS 中[配额](https://xfs.org/docs/xfsdocs-xml-dev/XFS_User_Guide/tmp/en-US/html/xfs-quotas.html)的文档 +* 阅读 XFS 中[配额](https://xfs.org/index.php/XFS_FAQ#Q:_Quota:_Do_quotas_work_on_XFS.3F)的文档 * 进一步阅读 [kube-scheduler 配置参考 (v1beta3)](/zh-cn/docs/reference/config-api/kube-scheduler-config.v1beta3/)