Getting started with Docker to Practice Note 1

First, Introduction:

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

2. Containers are virtualized at the operating system level, and are used to directly reuse the local host's operating system. The traditional approach is implemented at the hardware level

3. Compared with the traditional way of virtualization, the start of the container can be implemented in seconds, and then Docker is very efficient in system resource utilization, and the container does not consume additional system resources in addition to running the application. Traditional virtual machines run 10 different applications with 10 virtual machines, and Docker only needs to start 10 isolated applications.

Second, advantages:

1. Faster delivery and deployment: Once created or configured to work in any location
   

2. More efficient virtualization: The Docker container does not require additional hypervisor support to run.

3. Easier migration and expansion: can be run on any platform, including physical machines, virtual machines, public clouds, private clouds, personal computers, servers, and more.

4. Simpler management: All changes are distributed and updated incrementally, automating and efficiently managed.

5. Compare traditional Virtual Machine summary:
   

Characteristics	Container	Virtual machines
Start	Second level	Minute level
Hard disk use	is generally MB	typically GB
Performance	Close to native	Weaker than
System Support Volume	Stand-alone support for thousands of containers	Typically dozens of

Ii. Basic Concepts

1. Image: is a read-only template.
   

2. Container (Container): A running instance created from a mirror can be seen as a simple version of the Linux environment (including root user rights, process space, user space, and network space) which can be started, started, stopped, and deleted. Each container is a mutually isolated, secure platform. The container creates a writable layer at the top level when it is started.

3. Warehouse (Repository): A place where the image files are centrally stored, in public and private warehouses
   

This article is from the "Everything Possible" blog, please be sure to keep this source http://pybscf.blog.51cto.com/670942/1751131

Getting started with Docker to Practice Note 1