1. Add a network card to the virtual machine, bridging it to the physical network for external communication

2. Add another network card for communication between the host and the virtual machine

3. Change the network card name to eth

cd /etc/sysconfig/network-sripts/

mv ifcfg-ens33 ifcfg-eth0

vim ifcfg-eth0, change both device and name to eth0, as shown in the figure

Modify the grub file

vim /etc/default/grub

Regenerate the grub configuration

grub2-mkconfig -o /boot/grub2/grub.cfg

reboot to take effect

4. Configure static IPs for the two network cards

nmtui

Configure for network card 2, which is in host-only mode and cannot access the internet, so do not enable the default route

5. Create a bridge

nmtui

Activate

6. Connect eth0 to the bridge

Set eth0 to not connect on boot

Do not activate this network card

Add eth0 to the bridge

Activate br0

The effect is as follows:

7. Install the dockerd service

mkdir /home/DOCKER

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

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

yum install docker-ce docker-ce-cli containerd.io

Change to Aliyun’s mirror repository address

vim /etc/docker/daemon.json

If there is a firewall, first disable it

firewall-cmd –state

systemctl stop firewalld

systemctl disable firewalld

Start the dockerd service