如何在Debian/Ubuntu中启用CFS cgroup支持

问题描述：

我需要在主机上使用最新的Debian（9）或Ubuntu（17.0.4）来限制Docker容器中的CPU。如何在Debian/Ubuntu中启用CFS cgroup支持

$ docker info 
    Containers: 0 
    Running: 0 
    Paused: 0 
    Stopped: 0 
    Images: 1 
    Server Version: 17.06.0-ce 
    Storage Driver: overlay2 
    Backing Filesystem: extfs 
    Supports d_type: true 
    Native Overlay Diff: true 
    Logging Driver: json-file 
    Cgroup Driver: cgroupfs 
    Plugins: 
    Volume: local 
    Network: bridge host macvlan null overlay 
    Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog 
    Swarm: inactive 
    Runtimes: runc 
    Default Runtime: runc 
    Init Binary: docker-init 
    containerd version: cfb82a876ecc11b5ca0977d1733adbe58599088a 
    runc version: 2d41c047c83e09a6d61d464906feb2a2f3c52aa4 
    init version: 949e6fa 
    Security Options: 
    seccomp 
    Profile: default 
    Kernel Version: 4.9.20-std-1 
    Operating System: Ubuntu 17.04 
    OSType: linux 
    Architecture: x86_64 
    CPUs: 4 
    Total Memory: 7.753GiB 
    ID: 2JJV:EM37:VCY5:HVKQ:MUNV:VV5N:H247:XE5Q:VBFD:6VES:P62H:YXPJ 
    Docker Root Dir: /var/lib/docker 
    Debug Mode (client): false 
    Debug Mode (server): false 
    Registry: https://index.docker.io/v1/ 
    Experimental: false 
    Insecure Registries: 
    127.0.0.0/8 
    Live Restore Enabled: false 

    WARNING: No cpu cfs quota support 
    WARNING: No cpu cfs period support

我环顾四周，但我还没有想出如何在Debian/Ubuntu上实际启用CFS报价/期限支持。每当我尝试使用--cpus或--cpu股我得到一个错误：

NanoCPUs can not be set, as your kernel does not support CPU cfs period/quota or the cgroup is not mounted.

主机运行与20年9月4日的内核最新的Ubuntu，所以它应该有支持。在Debian 9上也一样。有关如何安装cgroup的指示或教程？

答

查看CFS Bandwidth Control

内核文档为了能够在内核：

General setup ---> 
    -*- Control Group support ---> 
     -*- CPU controller ---> 
      -*- Group scheduling for SCHED_OTHER 
       [*] CPU bandwidth provisioning for FAIR_GROUP_SCHED

买者自负：确保你知道你重新编译和安装不是由发行版提供的内核前在做什么。考虑一下UEFI安全启动，并从当前的.config开始。

如何在Debian/Ubuntu中启用CFS cgroup支持

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