Installing and uninstalling docker in CentOS

owenzhang24 2021-02-23 17:44:45
installing uninstalling docker centos

Whatever you want yum Installed docker After installation, I found that I couldn't start all the time , Has been submitted to the Failed to start docker.service: Unit not found. This mistake , So unload and reload , Record the process of this pit father

One 、 Check your installed docker

yum list installed |grep docker

After input, you can clearly see that the console will output

[root@xxwlog docker]# yum list installed |grep docker
docker-client.x86_64 2:1.13.1-162.git64e9980.el7.centos
docker-common.x86_64 2:1.13.1-162.git64e9980.el7.centos

Two 、 Uninstall the installed docker

yum -y remove docker-ce.x86_64

client It will be unloaded automatically. If it is not unloaded, continue to use it yum -y remove uninstall

Input again yum list installed |grep docker See if the deletion succeeded

3、 ... and 、 Install in the right posture docker

It is recommended to use Docker Engineshequ Repository installation for the community docker. So before you install it, you need to set up Docker The repository . after , You can install and update from the repository Docker.

3.1 Install Repository :

Install the required package .yum-utils Provides yum-config-manager  utility , and device-mapper-persistent-data and lvm2 By  devicemapper Memory driver .

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

3.2 Setting up a stable repository yum The source is Ali docker Source

yum-config-manager --add-repo

3.3 The first way to install Latest version installation

sudo yum install -y docker-ce

After installation , Please just skip 3.4

3.4 Specific version installation

To install a specific version of Docker Engine - Community, Please list repo Available versions in , Then select and install

3.4.1 List the installable versions

yum list docker-ce --showduplicates | sort -r

3.4.2 Install the specified version

# Specify the version from the installation list 17.09.0
yum install docker-ce-17.09.0.ce -y

3.5 Start up and join start up

sudo systemctl start docker
sudo systemctl enable docker

3.6 Verify that the installation was successful ( Yes client and service Two-part representation docker Installation and startup were successful )

docker version

3.7 Verify startup success

docker ps -a

3.8 Common administrative commands

#docker start-up 
sudo systemctl start docker

# Set power on self start 
sudo systemctl enable docker

# restart docker
sudo systemctl restart docker

# close docker
sudo systemctl stop docker

# Check to see if startup succeeded 
docker ps -a

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