Docker

Installation

1. install dependencies package

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

2. configure docker repository

yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

3. install docker-ce

yum install docker-ce

4. start docker service

systemctl start docker

4. check log during start process

tail -f /var/log/messages |grep docker

5. verify docker service has been installed successfully

docker version

6. alternative

docker run hello-world

7. enable docker service on OS start

systemctl enable docker

uninstallation

yum remove docker-ce
rm -rf /var/lib/docker

operation

1. show all images

docker images

2. show all containers

docker ps -a

3. show all running containers

docker ps

4. login docker hub repository

docker login --username=yourname --password=yourpassword

5. upload image to the docker repository

docker push repository:tagname

6. commit docker image

docker commit -m "message" imagename repository:tagname

7. start container

docker start containername

8. stop container

docker stop containername

9. remove container

docker rm containername

10. execute docker build

docker build repository:tagname .

. means the relative path, the absolute path is fine too, as long as the path points to the Dockerfile

11. start a container from a image

docker run -d -p80:80 centos_nginx:v1 /usr/local/nginx/sbin/nginx -g "daemon off;"

12. enter a container

docker exec -it containerid /bin/bash