How to limit Docker resources on CentOS

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.

The above is the detailed content of How to limit Docker resources on CentOS. For more information, please follow other related articles on the PHP Chinese website!