[zh] translate Tasks/Configuring a cgroup driver
luzg
parent
6845b647bb
commit
1c846aa427
|
|
@ -0,0 +1,240 @@
|
|||
---
|
||||
title: 配置 cgroup 驱动
|
||||
content_type: task
|
||||
weight: 10
|
||||
---
|
||||
<!--
|
||||
---
|
||||
title: Configuring a cgroup driver
|
||||
content_type: task
|
||||
weight: 10
|
||||
---
|
||||
-->
|
||||
|
||||
<!-- overview -->
|
||||
|
||||
<!--
|
||||
This page explains how to configure the kubelet cgroup driver to match the container
|
||||
runtime cgroup driver for kubeadm clusters.
|
||||
-->
|
||||
本页阐述如何配置 kubelet 的 cgroup 驱动以匹配 kubeadm 集群中的容器运行时的 cgroup 驱动。
|
||||
|
||||
## {{% heading "prerequisites" %}}
|
||||
|
||||
<!--
|
||||
You should be familiar with the Kubernetes
|
||||
[container runtime requirements](/docs/setup/production-environment/container-runtimes).
|
||||
-->
|
||||
你应该熟悉 Kubernetes 的[容器运行时需求](/zh/docs/setup/production-environment/container-runtimes)。
|
||||
<!-- steps -->
|
||||
|
||||
<!--
|
||||
## Configuring the container runtime cgroup driver
|
||||
-->
|
||||
## 配置容器运行时 cgroup 驱动 {#configuring-the-container-runtime-cgroup-driver}
|
||||
|
||||
<!--
|
||||
The [Container runtimes](/docs/setup/production-environment/container-runtimes) page
|
||||
explains that the `systemd` driver is recommended for kubeadm based setups instead
|
||||
of the `cgroupfs` driver, because kubeadm manages the kubelet as a systemd service.
|
||||
-->
|
||||
[容器运行时](/zh/docs/setup/production-environment/container-runtimes)页面提到：
|
||||
由于 kubeadm 把 kubelet 视为一个系统服务来管理，所以对基于 kubeadm 的安装，
|
||||
我们推荐使用 `systemd` 驱动，不推荐 `cgroupfs` 驱动。
|
||||
|
||||
<!--
|
||||
The page also provides details on how to setup a number of different container runtimes with the
|
||||
`systemd` driver by default.
|
||||
-->
|
||||
此页还详述了如何安装若干不同的容器运行时，并将 `systemd` 设为其默认驱动。
|
||||
|
||||
<!--
|
||||
## Configuring the kubelet cgroup driver
|
||||
-->
|
||||
## 配置 kubelet 的 cgroup 驱动
|
||||
|
||||
<!--
|
||||
kubeadm allows you to pass a `KubeletConfiguration` structure during `kubeadm init`.
|
||||
This `KubeletConfiguration` can include the `cgroupDriver` field which controls the cgroup
|
||||
driver of the kubelet.
|
||||
-->
|
||||
kubeadm 支持在执行 `kubeadm init` 时，传递一个 `KubeletConfiguration` 结构体。
|
||||
`KubeletConfiguration` 包含 `cgroupDriver` 字段，可用于控制 kubelet 的 cgroup 驱动。
|
||||
|
||||
<!--
|
||||
If the user is not setting the `cgroupDriver` field under `KubeletConfiguration`,
|
||||
`kubeadm init` will default it to `systemd`.
|
||||
-->
|
||||
|
||||
{{< feature-state for_k8s_version="v1.21" state="stable" >}}
|
||||
|
||||
{{< note >}}
|
||||
如果用户没有在 `KubeletConfiguration` 中设置 `cgroupDriver` 字段，
|
||||
`kubeadm init` 会将它设置为默认值 `systemd`。
|
||||
{{< /note >}}
|
||||
|
||||
<!--
|
||||
A minimal example of configuring the field explicitly:
|
||||
-->
|
||||
这是一个最小化的示例，其中显式的配置了此字段：
|
||||
|
||||
```yaml
|
||||
# kubeadm-config.yaml
|
||||
kind: ClusterConfiguration
|
||||
apiVersion: kubeadm.k8s.io/v1beta2
|
||||
kubernetesVersion: v1.21.0
|
||||
---
|
||||
kind: KubeletConfiguration
|
||||
apiVersion: kubelet.config.k8s.io/v1beta1
|
||||
cgroupDriver: systemd
|
||||
```
|
||||
|
||||
<!--
|
||||
Such a configuration file can then be passed to the kubeadm command:
|
||||
-->
|
||||
这样一个配置文件就可以传递给 kubeadm 命令了：
|
||||
|
||||
```shell
|
||||
kubeadm init --config kubeadm-config.yaml
|
||||
```
|
||||
|
||||
<!--
|
||||
Kubeadm uses the same `KubeletConfiguration` for all nodes in the cluster.
|
||||
The `KubeletConfiguration` is stored in a [ConfigMap](/docs/concepts/configuration/configmap)
|
||||
object under the `kube-system` namespace.
|
||||
|
||||
Executing the sub commands `init`, `join` and `upgrade` would result in kubeadm
|
||||
writing the `KubeletConfiguration` as a file under `/var/lib/kubelet/config.yaml`
|
||||
and passing it to the local node kubelet.
|
||||
-->
|
||||
{{< note >}}
|
||||
Kubeadm 对集群所有的节点，使用相同的 `KubeletConfiguration`。
|
||||
`KubeletConfiguration` 存放于 `kube-system` 命名空间下的某个
|
||||
[ConfigMap](/zh/docs/concepts/configuration/configmap) 对象中。
|
||||
|
||||
执行 `init`、`join` 和 `upgrade` 等子命令会促使 kubeadm
|
||||
将 `KubeletConfiguration` 写入到文件 `/var/lib/kubelet/config.yaml` 中，
|
||||
继而把它传递给本地节点的 kubelet。
|
||||
|
||||
{{< /note >}}
|
||||
|
||||
<!--
|
||||
## Using the `cgroupfs` driver
|
||||
-->
|
||||
# 使用 `cgroupfs` 驱动
|
||||
|
||||
<!--
|
||||
As this guide explains using the `cgroupfs` driver with kubeadm is not recommended.
|
||||
|
||||
To continue using `cgroupfs` and to prevent `kubeadm upgrade` from modifying the
|
||||
`KubeletConfiguration` cgroup driver on existing setups, you must be explicit
|
||||
about its value. This applies to a case where you do not wish future versions
|
||||
of kubeadm to apply the `systemd` driver by default.
|
||||
-->
|
||||
正如本指南阐述的：不推荐与 kubeadm 一起使用 `cgroupfs` 驱动。
|
||||
|
||||
如仍需使用 `cgroupfs`，
|
||||
且要防止 `kubeadm upgrade` 修改现有系统中 `KubeletConfiguration` 的 cgroup 驱动，
|
||||
你必须显式声明它的值。
|
||||
此方法应对的场景为：在将来某个版本的 kubeadm 中，你不想使用默认的 `systemd` 驱动。
|
||||
|
||||
<!--
|
||||
See the below section on "Modify the kubelet ConfigMap" for details on
|
||||
how to be explicit about the value.
|
||||
|
||||
If you wish to configure a container runtime to use the `cgroupfs` driver,
|
||||
you must refer to the documentation of the container runtime of your choice.
|
||||
-->
|
||||
参阅以下章节“修改 kubelet 的 ConfigMap”，了解显式设置该值的方法。
|
||||
|
||||
如果你希望配置容器运行时来使用 `cgroupfs` 驱动，
|
||||
则必须参考所选容器运行时的文档。
|
||||
|
||||
<!--
|
||||
## Migrating to the `systemd` driver
|
||||
-->
|
||||
## 迁移到 `systemd` 驱动
|
||||
|
||||
<!--
|
||||
To change the cgroup driver of an existing kubeadm cluster to `systemd` in-place,
|
||||
a similar procedure to a kubelet upgrade is required. This must include both
|
||||
steps outlined below.
|
||||
-->
|
||||
要将现有 kubeadm 集群的 cgroup 驱动就地升级为 `systemd`，
|
||||
需要执行一个与 kubelet 升级类似的过程。
|
||||
该过程必须包含下面两个步骤：
|
||||
|
||||
<!--
|
||||
Alternatively, it is possible to replace the old nodes in the cluster with new ones
|
||||
that use the `systemd` driver. This requires executing only the first step below
|
||||
before joining the new nodes and ensuring the workloads can safely move to the new
|
||||
nodes before deleting the old nodes.
|
||||
-->
|
||||
{{< note >}}
|
||||
还有一种方法，可以用已配置了 `systemd` 的新节点替换掉集群中的老节点。
|
||||
按这种方法，在加入新节点、确保工作负载可以安全迁移到新节点、及至删除旧节点这一系列操作之前，
|
||||
只需执行以下第一个步骤。
|
||||
{{< /note >}}
|
||||
|
||||
<!--
|
||||
### Modify the kubelet ConfigMap
|
||||
-->
|
||||
### 修改 kubelet 的 ConfigMap
|
||||
|
||||
<!--
|
||||
- Find the kubelet ConfigMap name using `kubectl get cm -n kube-system | grep kubelet-config`.
|
||||
- Call `kubectl edit cm kubelet-config-x.yy -n kube-system` (replace `x.yy` with
|
||||
the Kubernetes version).
|
||||
- Either modify the existing `cgroupDriver` value or add a new field that looks like this:
|
||||
-->
|
||||
- 用命令 `kubectl get cm -n kube-system | grep kubelet-config` 找到 kubelet 的 ConfigMap 名称。
|
||||
- 运行 `kubectl edit cm kubelet-config-x.yy -n kube-system` （把 `x.yy` 替换为 Kubernetes 版本）。
|
||||
- 修改现有 `cgroupDriver` 的值，或者新增如下式样的字段：
|
||||
|
||||
```yaml
|
||||
cgroupDriver: systemd
|
||||
```
|
||||
<!--
|
||||
This field must be present under the `kubelet:` section of the ConfigMap.
|
||||
-->
|
||||
该字段必须出现在 ConfigMap 的 `kubelet:` 小节下。
|
||||
|
||||
<!--
|
||||
### Update the cgroup driver on all nodes
|
||||
-->
|
||||
### 更新所有节点的 cgroup 驱动
|
||||
|
||||
<!--
|
||||
For each node in the cluster:
|
||||
|
||||
- [Drain the node](/docs/tasks/administer-cluster/safely-drain-node) using `kubectl drain <node-name> --ignore-daemonsets`
|
||||
- Stop the kubelet using `systemctl stop kubelet`
|
||||
- Stop the container runtime
|
||||
- Modify the container runtime cgroup driver to `systemd`
|
||||
- Set `cgroupDriver: systemd` in `/var/lib/kubelet/config.yaml`
|
||||
- Start the container runtime
|
||||
- Start the kubelet using `systemctl start kubelet`
|
||||
- [Uncordon the node](/docs/tasks/administer-cluster/safely-drain-node) using `kubectl uncordon <node-name>`
|
||||
-->
|
||||
对于集群中的每一个节点：
|
||||
|
||||
- 执行命令 `kubectl drain <node-name> --ignore-daemonsets`，以
|
||||
[腾空节点](/zh/docs/tasks/administer-cluster/safely-drain-node)
|
||||
- 执行命令 `systemctl stop kubelet`，以停止 kubelet
|
||||
- 停止容器运行时
|
||||
- 修改容器运行时 cgroup 驱动为 `systemd`
|
||||
- 在文件 `/var/lib/kubelet/config.yaml` 中添加设置 `cgroupDriver: systemd`
|
||||
- 启动容器运行时
|
||||
- 执行命令 `systemctl start kubelet`，以启动 kubelet
|
||||
- 执行命令 `kubectl uncordon <node-name>`，以
|
||||
[取消节点隔离](/zh/docs/tasks/administer-cluster/safely-drain-node)
|
||||
|
||||
<!--
|
||||
Execute these steps on nodes one at a time to ensure workloads
|
||||
have sufficient time to schedule on different nodes.
|
||||
|
||||
Once the process is complete ensure that all nodes and workloads are healthy.
|
||||
-->
|
||||
在节点上依次执行上述步骤，确保工作负载有充足的时间被调度到其他节点。
|
||||
|
||||
流程完成后，确认所有节点和工作负载均健康如常。
|
||||
Loading…
Reference in New Issue