Official website: https://www.docker.com/
Demo system: Centos 7
firewalld On, selinux open
I. install the repository expansion package
yum install yum-utils -y
II. Setting the repository
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
III. installation of three packages
yum install docker-ce docker-ce-cli containerd.io -y
## docker-ce Package, Docker CE cli, toolkit, containerd.io It is mainly used for system and Docker api daemons
IV. start docker
systemctl start docker
V. verification
1. View docker version information:
docker version
2. Query docker details:
docker info
Vi. view local image
docker images
| REPOSITORY | TAG | IMAGE ID | CREATED | SIZE |
| Warehouse name | label | ID of the image (guaranteed to be unique) | Creation time | size |
VII. Find image
docker search nginx
NAME DESCRIPTION STARS OFFICIAL AUTOMATED nginx Official build of Nginx. 15732 [OK] jwilder/nginx-proxy Automated Nginx reverse proxy for docker con... 2088 [OK] richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable of... 818 [OK]
##OFFICIAL here ok indicates that it is an OFFICIAL image
VIII. Download Image
docker pull nginx
IX. create containers directly using images
1. The foreground starts the container, the window closes, and the process closes automatically
docker run + parameter [images:tag] start command
docker run --name nginx_1 nginx:latest
##Nginx: latest, which is the label
2. Start nginx in the background
docker run -d --name nginx_2 nginx
## nginx_ two This means that the name of the container is nginx_2. The last nginx here represents the image used
3. In interactive mode, and assign a pseudo terminal to run the container
docker run -itd --name nginx_5 nginx
docker run -itd -p 9527:80 --name nginx_4 nginx:latest
## 9527 It is the port exposed to external access. You can access the services in the container by accessing port 9527 of the host
##Host 9527 And 80 An intranet will be generated between, but access to port 80 of the intranet through 9527
##Access container: Browser input native IP:9527
Xi. Viewing containers
docker ps
2. View all containers (including those not started)
docker ps -a
3. Directly view the container ID
docker ps -aq
Xi. Enter the container and assign a pseudo terminal interactively
docker exec -t 80db5c362fb3 /bin/bash
## 80db5c362fb3 This ID is via docker ps Get, / bin/bash interpreter Cannot enter container without interpreter
XII. Start and stop the container
docker start/stop [container ID]
XIII. Delete container
docker rm 83023b4bead2
##Started containers cannot be deleted. You must stop starting to delete them
XIV. Delete all stopped containers
docker rm `docker ps -aq`
docker inspect 83023b4bead2
XVI. Add a soft connection to the image and rename and label it:
docker tag nginx:latest centos_nginx:1
##The image id is the same
XVII. Delete image
docker rmi nginx:latest
##If it is not necessary, it is better not to delete the mirror.
XVIII. File replication between container and host
1. Host to container:
docker cp test,txt 80db5c362fb3:/root
##Copy test.txt in the current directory To 80db5c362fb3 the root under this image
2. Container to host machine:
docker cp 80db5c362fb3:/root/f1 .
19. Do not enter the container to view | create | delete | files in the container
docker exec 80db5c362fb3 ls /root
##Add / bin/bash Enter the container, add the command directly, and execute the command without entering the container