Why use docker deployment

Advantages of using docker deployment: 1. Faster delivery and deployment of code, which can save a lot of development, testing, and deployment time; 2. Kernel-level virtualization can achieve higher performance and efficiency ; 3. Good compatibility, making it easier to migrate and expand applications; 4. Automated and efficient management can be achieved.

The operating environment of this tutorial: linux5.9.8 system, docker-1.13.1 version, Dell G3 computer.

Docker is an open source application container engine that allows developers to package their applications and dependency packages into a portable image and then publish it to any popular Linux or Windows operating system machine. Virtualization can be achieved. Containers completely use the sandbox mechanism and will not have any interfaces with each other.

Why use Docker for deployment?

As an emerging virtualization method, Docker has many advantages compared with traditional virtualization methods.

First of all, Docker containers can be started in seconds, which is much faster than traditional virtual machine methods. Secondly, Docker has a high utilization rate of system resources. Thousands of Docker containers can be run simultaneously on one host.

In addition to running the application in it, the container basically consumes no additional system resources, making the application performance very high and the system overhead as small as possible. The traditional virtual machine method requires 10 virtual machines to run 10 different applications, while Docker only needs to start 10 isolated applications.

Specifically, Docker has great advantages in the following aspects.

1. Faster delivery and deployment

For development and operation and maintenance (devop) personnel, what they most hope for is to create or configure once, which can be done at any time The place operates normally.

Developers can use a standard image to build a set of development containers. After development is completed, operation and maintenance personnel can directly use this container to deploy code. Docker can quickly create containers, quickly iterate on applications, and make the entire process visible, making it easier for other members of the team to understand how the application is created and works. Docker containers are light and fast! The startup time of the container is seconds, which saves a lot of time in development, testing, and deployment.

2. More efficient virtualization

The running of Docker containers does not require additional hypervisor support. It is kernel-level virtualization, so it can achieve higher Performance and efficiency.

3. Easier migration and expansion

Docker containers can run on almost any platform, including physical machines, virtual machines, public clouds, private clouds, PCs, servers, etc. This compatibility allows users to directly migrate an application from one platform to another.

4. Simpler management

Using Docker, only small modifications are needed to replace a large amount of update work in the past. All modifications are distributed and updated incrementally, enabling automated and efficient management.

Recommended learning: "docker video tutorial"

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