How to install docker using YUM

As shown in the following figure:

If the version is Centos 7.0 or above, it will be fine.
The command to view the current system kernel version is as follows:

uname -r

The running results are as follows:

Step 2: Clean up the installed docker (if you have not installed it, you can skip this step)

The cleanup commands are as follows:

yum remove docker \
         docker-client \         
				 docker-client-latest \
         docker-common \
         docker-latest \
         docker-latest-logrotate \
         docker-logrotate \
         docker-selinux \
         docker-engine-selinux \
         docker-engine

Step 3: Install the Device Mapper tool

The installation command is as follows:

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

Step 4: Configure Docker's yum data source

Configure the yum data source command as follows:

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

The configuration is successful as shown below:

Step 5: Update the yum cache

The command is as follows:

yum makecache fast

Step 6: Install docker-ce (community edition)

The installation command is as follows:

 yum -y install docker-ce

Step 7: Start Docker

The startup command is as follows:

systemctl start docker

Startup

systemctl enable docker.service

Restart:

systemctl restart docker

Start the container and add --restart=always

no does not automatically restart the container. (default value)

on-failure The container exits due to an error (the container exit status is not 0) and restarts the container

Unless-stopped restarts the container only when the container has been stopped or Docker is stopped/restarted

Always restart the container when the container has been stopped or Docker is stopped/restarted

If the project has been run, use update to update

docker update --restart=always container name

After startup, you can use the following command to verify

 docker -v

The results are as follows:

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