Getting Started with Docker (1) installation of Docker under Centos 7

CentOS 7 Installation Docker

What is Docker

Docker is an open source project that was born in early 2013 and was originally an amateur project within the DotCloud company. It is based on Google's launch of the Go language implementation. The project later joined the Linux Foundation and complied with the Apache 2.0 protocol, and the project code was maintained on GitHub.

Docker has been widely watched and discussed since open source, so that DotCloud company later changed its name to Docker INC. Redhat has focused on supporting Docker;google in its RHEL6.5 and is also widely used in its PaaS products.

The goal of the Docker project is to implement a lightweight operating system virtualization solution. Docker is based on technologies such as Linux containers (LXC).

On the basis of LXC, Docker has been further encapsulated, so that users do not need to care about the management of containers, making the operation easier. User-operated Docker containers are as simple as operating a fast, lightweight virtual machine.

The image below compares the differences between Docker and traditional virtualization, where the container is virtualized at the operating system level, directly reusing the local host's operating system, while the traditional approach is implemented at the hardware level.

Docker Installation and startup

1. Switch to the root user su Enter and enter the root password.

Installing Docker

[[email protected]/] # Yum Install Docker-io

After the installation is successful, start the Docker service

[[email protected]/] # Systemctl start Docker

Add Docker to boot

[[email protected]/] # Chkconfig Docker on

View Docker Information

1.docker version: View the release number of Docker, including client, server, dependent go, etc.
2.docker Info: View System (Docker) level information, including managed images, containers number, etc.

　　

Getting Started with Docker (1) installation of Docker under Centos 7