Docker[1] is a tool designed to make it easier to create, deploy, and run applications by using containers.

In this class , i will introduce the Virtual Maching used in Docker Class.

  • How to install the docker ? c.f Search "docker ce install centos7 "on google.com centos 7 install docker **You can use this command to verify that your virtual machine has docker installed

rpm -qa | grep docker

In this docker VM needed two network adapter, (1) NAT (2) Host-only

  • How to start the docker service ?

systemctl start docker

  • How to check the docker service?

systemctl status docker

	**For this First Class**

we need to pull the docker image from docker hub after started the docker service in this VM, and change the user to root

docker pull chusiang/takaojs1607

this command could need some time to get the docker images from the internet . After when you fininshed , you can use this command to check the docker images in your VM

docker images

in this command , you can see the Repository (Let's use this example) (1)chusiang means the docker account (2)takaojs1607 means the image name

And you can see that the IMAGED ID like 90ebc6376878

  • IMAGED ID can be only , and the containers ID can be many different.*

Let start docker !

docker run -it chusiang/takojs1607 bash -i means interactive -t means terminal bash ---> command

****the basic command for first Class ****

  1. docker ps it can check what the docker process run on this system ex: the container id is f0eba9cc4a7
  2. `docker stop containers ID ex: docker stop f0e
  3. docker ps -a -a meanes all , you can see all the docker process
  4. docker start containers ID ex: docker start f0e
  5. docker attach containers ID ex: docker attach f0e
  6. docker rm containers ID you can use this command to remove this container ! But !! not the docker images !
  7. docker rm -f $(docker ps -q -a)

this command can kill the docker container by force whatever the docker process start or stop -f means force -a means all

Reference [1]https://www.docker.com