Installation of docker in centos system

Introduction to docker

Docker is an open source application container engine, developers can package their applications into containers, and then migrate to docker applications on other machines to achieve rapid deployment. If a failure occurs, the service can be quickly restored through mirroring.

Environmental preparation

Operating system: CentOS 7

1. Uninstall the previous version of yum remove docker docker-common docker-selinux docker-engine2. Plug-ins required to install docker: yum install-y yum-utils device-mapper-persistent-data lvm23.yum-config-manager-- add-repo https://download.docker.com/linux/centos/docker-ce.repo

If you report the above error, execute: yum install epel-release-y4. Install the latest version of Docker CE yum install docker-ce-y using Aliyun docker repository vim / etc/docker/daemon.json {"registry-mirrors": ["https://pee6w651.mirror.aliyuncs.com"]} Note: synchronize server time: ntpdate-u ntp.aliyun.com"