Does docker belong to the paas layer?

Docker belongs to the paas layer; paas is the abbreviation of "Platform as a Service", which refers to using the software development platform as a service and submitting it to users in the SaaS model. Docker is an open source product of dotCloud, a PaaS provider. An advanced container engine based on LXC.

The operating environment of this tutorial: linux7.3 system, docker-1.13.1 version, Dell G3 computer.

Docker belongs to the paas layer

docker belongs to the paas layer.

Docker is an open source application container engine that allows developers to package their applications and dependencies into a portable image and then publish it to any popular Linux or Windows operating system machine , virtualization can also be achieved.

PaaS is the abbreviation of (Platform as a Service), which refers to platform as a service.

The so-called PaaS actually refers to the software development platform as a service, submitted to users in the SaaS model. Therefore, PaaS is also an application of the SaaS model.

Pass is a concept, and now many companies have made Pass platform products (such as Cloud Foundry as a mainstream open source PaaS).

Docker is made using container technology. Pass can be made using containers or other technologies. Moreover, the Pass platform has more functions than docker. Docker has completed one of the core functions of paas. Docker's other deficiencies must be supplemented by other things (such as Kubernetes).

Although there are many developers of Docker containers, they are still not reassuring in terms of stability, which is most important for enterprise applications. You need to manage hundreds or thousands of Docker builds, which is very complicated. Docker's orchestration and management have always been lacking, so many container ecosystem participants have developed on top of it, such as Mesos, Kubernetes, Marathon, Swarm, etc., all of which are helping Docker grow. However, this ecosystem cannot avoid competition with each other during its development. What enterprises pursue is time and efficiency. How to choose, combine and use these Docker orchestration and scheduling tools is not only very difficult for enterprises, but also greatly increases management and maintenance costs.

The principle of the PaaS platform is "app-centric", which is application-centric rather than container-centric. If the enterprise PaaS platform container service manages hundreds or thousands of applications, it needs to support continuous release, continuous integration, security services, routing management, grayscale management, configuration management and other functions at the application level. Currently, this Docker ecosystem still does not have The functions of any company can meet these needs. Five to eight tools must be selected to manually create and combine such functions. For a platform that supports these functions at the same time, its own upgrade, capacity expansion, and disaster recovery and backup mechanisms will become another problem for enterprises.

Of course, Docker is progressing very quickly and is constantly solving various problems. Docker and Pivotal are both members of the OCI container standard. In the future, container technology will definitely move towards a unified standard runC, just like the J2EE standard back then. Cloud Foundry already supports the use of Docker images. As a mainstream open source PaaS, Cloud Foundry has been verified in key production applications of many large enterprises.

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