Docker CE supports 64 -bit version CentOS 7 and requires kernel version no lower than 3.10 .
Uninstalling old versions of Docker
The old version of Docker is called docker or docker-engine , use the following command to uninstall the old version:
$ sudo yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-selinux \ docker-engine-selinux \ docker-engine
Use yum install
to execute the following command to install dependencies:
$ sudo yum install -y yum-utils \ device-mapper-persistent-data \ lvm2
In view of domestic network problems, it is strongly recommended to use domestic sources. Please check the official sources in the comments.
Execute the following command to add the yum software source:
$ sudo yum-config-manager \ --add-repo \ https://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo # Official source # $ sudo yum-config-manager \ # --add-repo \ # https://download.docker.com/linux/centos/docker-ce.repo
If you need the latest version of Docker CE use the following command:
$ sudo yum-config-manager --enable docker-ce-edge
Install Docker CE
to update the yum software source cache, and install docker-ce .
$ sudo yum makecache fast $ sudo yum install docker-ce
Start Docker CE
$ sudo systemctl enable docker $ sudo systemctl start docker
Test if Docker is installed correctly
$ docker run hello-world Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world ca4f61b1923c: Pull complete Digest: sha256:be0cd392e45be79ffeffa6b05338b98ebb16c87b255f48e297ec7f98e123905c Status: Downloaded newer image for hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://cloud.docker.com/ For more examples and ideas, visit: https://docs.docker.com/engine/userguide/
If the above information can be output normally, the installation is successful.
Mirror acceleration
