Shulou(Shulou.com)06/01 Report--

This article mainly introduces "the introduction and installation process of Docker". In the daily operation, I believe many people have doubts about the introduction and installation process of Docker. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "introduction and installation process of Docker". Next, please follow the editor to study!

What is Docker?

Docker is an open source software deployment solution

Docker is also a lightweight application container framework.

Docker can package, publish, and run any application.

Docker is an open source engine that can easily create a lightweight, portable, self-sufficient container for any application. Containers that developers compile and test on notebooks can be deployed in batches in production environments, including VMs (virtual machines), bare metal, OpenStack clusters and other basic application platforms.

Docker is commonly used in the following scenarios:

Automatic Packaging and Distribution of web applications

Automated testing and continuous integration, release

Deploy and adjust databases or other background applications in a service-oriented environment

Build your own PaaS environment by compiling or extending existing OpenShift or Cloud Foundry platforms from scratch.

Main uses of Docker

Provide an one-time environment. For example, testing other people's software locally and providing an environment for unit testing and building during continuous integration.

Provide flexible cloud services. Because the Docker container can be switched on and off, it is very suitable for dynamic capacity expansion and reduction.

Build a micro-service architecture. Through multiple containers, a machine can run multiple services, so the micro-service architecture can be simulated locally.

Three elements of Docker

Mirror image

Container

Warehouse

Docker architecture

Docker uses the client-server architecture model and uses remote API to manage and create Docker containers.

The Docker container is created through a Docker image.

The relationship between containers and mirrors is similar to objects and classes in object-oriented programming.

Docker installation

Docker is divided into community version and enterprise version, the community version is free, the enterprise version is charged, we choose the community version for individual learning, that is, the installation of docker-ce, and follow-up notes are based on this.

1. Use the official installation script to install automatically:

Curl-fsSL https://get.docker.com | bash-s docker-- mirror Aliyun

2. CentOS 7 (use yum to install, and my server is Aliyun centos7):

Step 1: install some necessary system tools

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

Step 2: add software source information

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

Step 3: update and install Docker-CE

Sudo yum makecache fast sudo yum-y install docker-ce

Step 4: enable Docker service

Sudo systemctl start docker

Step 5: installation check

Common command

Start docker:systemctl start docker

Stop docker:systemctl stop docker

Restart docker:systemctl restart docker

View docker status: systemctl status docker

Boot: systemctl enable docker

At this point, the study on the "introduction and installation process of Docker" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.