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Home Operation and Maintenance CentOS How to limit Docker resources on CentOS

How to limit Docker resources on CentOS

Apr 14, 2025 pm 02:24 PM
centos docker tool

In CentOS systems, you can use Docker's --cpus and --memory options to effectively control the container's CPU and memory resource consumption. Here are some specific application examples:

  1. CPU resource limitations:

    • Allocation of a single CPU core to the container:

       docker run -it --cpus=1 centos:latest /bin/bash
    • Allocate two CPU cores to the container:

       docker run -it --cpus=2 centos:latest /bin/bash
  2. Memory resource limits:

    • Limit container memory to 128MB:

       docker run -it --memory=128m centos:latest /bin/bash
    • Limit container memory to 512MB:

       docker run -it --memory=512m centos:latest /bin/bash

You can set both CPU and memory limits:

 docker run -it --cpus=1 --memory=128m centos:latest /bin/bash

For more finer CPU core allocation, you can use --cpuset-cpus option. For example, in a system with 4 CPU cores (number 0-3), to make the container use only cores 0 and 2, you can use the following command:

 docker run -it --cpuset-cpus=0,2 centos:latest /bin/bash

Important Note: The above resource restriction function is only valid in Docker 1.10 and above. For older Docker versions, you may need to use third-party tools such as cgroups to achieve resource control.

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