With the continuous in-depth development of enterprise digitalization, cloud native technology has become a hot topic in the industry. The so-called cloud native, based on technologies such as containers, microservices, and DevOps, provides a platform and system for distributed deployment and unified management of applications. Cloud native is a collection of ideas and tools. As can be seen from its conceptual definition, container technology is the cornerstone of cloud native. Developers working in the cloud native field, if they do not understand and master container technology, are like trying to build a high-rise building on a floating sand embankment.
what is a container
Before introducing why we need containers, please recall the history of the birth of your first Hello World program. After we worked hard to solve the problems of various local development tool configurations (compilers, environment variables, etc.), we finally saw the output of Hello World. The joy is self-evident, but we also Never forget the frustration and helplessness of encountering various environmental configuration issues.
The author has worked in the field of enterprise-level management software based on on-premises for more than ten years. I have encountered some applications of the same version, which can run normally on the development machine and test machine, but fail after being deployed to the production environment. Problems, and finally after investigation, these problems are caused by differences in the operating environment.
Container technology, as a lightweight, portable and self-contained software packaging technology, enables applications to run the same way almost anywhere. Using container technology, developers create and test containers in their local development environment, and can run them on virtual machines, physical servers or public cloud hosts of the production system without any modification, thus completely avoiding software changes due to differences in operating environments. Various operational problems that may arise.
Beginners understand container technology and can start from
containerStart with the literal meaning of the word. Imagine a container in real life. We need to transport a batch of goods from one place to another. We only need to pack the goods into the container according to the standard regulations. There will be no mutual influence between the container and the container, and the container does not care about the fruit in the box. , clothing or electronic products, so the packaging of these goods follows standardized regulations. After these containers are packed, they can be transported by common means of transport, such as cars and freighters. After arriving at the destination, open the container in a standardized way and take out the goods inside to use.