CentOS 7 Install docker

1. Ensure that the version is CentOS 7 or later

cat /etc/redhat-release
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Yum install GCC

yum -y install gcc
yum -y install gcc-c++
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3. Uninstall the earlier version

yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine
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4. Install required software packages

yum install -y yum-utils
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5. Set a stable mirror vault

Yum -config-manager --add-repo HTTPS://download.docker.com/linux/centos/docker-ce.repoYum-config-manager --add-repo HTTPS://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo(Both commands are ok, but aliyun is recommended, because the speed is faster in China!)Copy the code

You can use the following command to view the configuration:

cat /etc/yum.repos.d/docker-ce.repo
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Here are some screenshots:

6. Update the yum software package index

yum makecache fast
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7. Install the Docker CE

yum -y install docker-ce
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(Note: this is because I have installed it once, so the prompt already exists and is the latest version. This should take about 2 minutes if you are doing it for the first time.

8. To start the docker

systemctl start docker
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9. The test

docker version
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docker run hello-world
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This step may wait a little bit, as you need to go to Ali Cloud to download the latest. It will come up laterHello from Docker! 了

docker images
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10. Configure mirror acceleration

systemctl restart docker
ps -ef|grep docker|grep -v grep
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11. Uninstall

systemctl stop docker
yum -y remove docker-ce
rm -rf /var/lib/docker
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Attachment: Docker official website