[Docker Practical learning] 01 The basic concepts of docker

🐳 The content of docker’s preliminary learning

1. Basic concepts of Docker
2. Install the Docker
3. Docker runs Hello World

The background of the docker

• 🔗link : Docker Core technology preview
• Before learning docker, I first learned about his historical background, which is of great help to my study.
• Understanding the history can more quickly understand the direction of the development of technology and the essence of the way to use
• This article introduces the technological development process of Docker, the core technologies in Docker and the related sub-projects, which is a good introduction.

Basic concepts of Docker

Container technology

• The core ideas : Build once, Run anywhere.
• Build,Ship and Run
• Docker basic LXC developed by the go language.
• Open source licenses :Apache2.0

Mirror container repository

• images

  • Similar to a virtual machine images,Read-only template-independent file system
  • Can create container
  • Build based on DockerFile
  • It can be downloaded from Docker Hub(Docker Hub is similar to GitHub)

• container

  • Similar to a virtual machine,can start stop delete …
  • Isolated from each other but not as effective as virtual machines
  • Control Groups and Namespace Implement isolation
    • CGroups: Access restrictions on CPU, memory, disk, and other resources
    • Namespaces :Provides isolation of system resources: processes, networks, file systems, and so on.

• repository

  • It’s very similar to Git and GitHub that we learned about before.
  • Registry can save images .Docker Hub It’s so like a Git Hub.
  • Docker supports push and poll like Git。

Install the docker

• Docker have two types Community Edition(CE) and Enterprise Edition(EE), i select CE install on Ubuntu18.04

1. Update software

    sudo apt-get update
   

2. apt-get some tools

   sudo apt-get -y install \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common
   

3. China’s special network adds a mirror image of aliyun

   curl -fsSL http://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -
   sudo add-apt-repository "deb [arch=amd64] http://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"
   

4. install docker-engine

     sudo apt-cache madison docker-engine
     sudo apt-get remove docker docker-engine docker.io
     sudo apt-get install docker-ce
   

   • Check to see if the right version is available
   • remove the docker if out server already has a docker
   • Finally, the official installation of docker-ce

5. we can check the docker version

   docker version
   

6. China USES mirror access to speed up

   1. edit /etc/docker/daemon.json
      sudo vi /etc/docker/daemon.json

{
 "registry-mirrors": ["https://n6syp70m.mirror.aliyuncs.com"]
}

2. sudo service docker restart

Try helloword with docker

docker container run hello-world
run that command the docker will run and print hello world in terminal

conclusion

🐳 The content of docker’s preliminary learning

1. Basic concepts of Docker
2. Install the Docker
3. Docker runs Hello World

• This is the first time for me to record my study notes in English.
• I’m trying really hard and I hope it’s a good start
• I learn docker on this platform www.shiyanlou.com It’s not an AD but it works really well in Chinese The experiment costs one RMB per hour.But 😁play docker with me is free
• If you have any questions, please contact me.

contact 🔗

My github is @HANXU2018
My Chinese blog in CSDN site https://hanxu.blog.csdn.net/
✉️ google email [email protected]
📪QQ mailbox can get my reply faster
[email protected]

thanks
2020/5/18
🤝🤝🤝