tags: Docker issues
surroundings:The local environment is the Centos7 system installed on VirtualBox.
Docker service status:Use the command systemctl status docker.service according to the prompt to check the status of the docker service, and find the following status information:

solution:Uninstall docker and reinstall new docker.
Solution steps:
1. Uninstall Docker. The old version of docker is uninstalled without being installed successfully.
(1) View the installed packages: yum list installed | grep docker
The old version installed on this machine: docker.x86_64, docker-client.x86_64, docker-common.x86_64
(2) Delete the installed Docker related packages:
yum -y remove docker.x86_64
yum -y remove docker-client.x86_64
yum -y remove docker-common.x86_64
2. Install Docker
(1) Check the kernel version [Docker requires that the kernel version of the Centos system is higher than 3.10]
¡Uname -r ¡[the kernel version of this machine: 3.10.0-327.el7.x86_64]
(2) Update the yum package to the latest (it may take a long time, wait slowly ...)
yum update
(3) Install required software packages. [Yum-util provides the yum-config-manager function, and the other two are the dependencies required by the devicemapper driver]
yum install -y yum -utils device-mapper-persistent-data lvm2
(4) Set yum source
yum install -y yum -utils device-mapper-persistent-data lvm2
(5) View the docker version of the warehouse
yum list docker-ce --showduplicates | sort -r
(6) Install docker
yum install docker-ce
(7) Start docker, set boot to start docker.
systemctl start docker
systemctl enable docker
Systemctl stop docker [Supplement: This is the command to close docker]
(8) View version
docker version

(9) To check whether the startup is successful, you can use the search command.
docker search mysql

(10) View log status
systemctl status docker.service

Job for docker.service failed because the control process exited with error code. See “systemctl status docker.service” and “journalctl -xe” for details Solution Perform the fo...
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