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Docker multiple containers cgroup resource CPU MEM limitation

I'm using Ubuntu 21.10 and would like to restrict the system resources (CPU, MEM) for a subset of my docker containers - not for a particular container. How can I do that?

Solution

  • I figured out some solution. There is a docker param to us on a container start.

    First you need to create mygroup.slice in /etc/systemd/system/mygroup.slice and run systemctl daemon-reload.

    [Unit]
Description=my cgroup for Docker
Before=slices.target

[Slice]
MemoryAccounting=true
MemoryHigh=7G
MemoryMax=7.5G
CPUAccounting=true
CPUQuota=50%

    After that one can start a set of containers with the next argument.

    --cgroup-parent=mygroup.slice

    And finally run systemd-cgtop to check the resource allocation.