Is Alibaba Cloud based on kvm or docker?

Alibaba Cloud is based on KVM rather than Docker

With the development of cloud computing technology, more and more companies are turning to the cloud to deploy their applications. Among the many cloud service providers, Alibaba Cloud is undoubtedly one of the most popular. However, is Alibaba Cloud's infrastructure based on KVM or Docker?

In fact, Alibaba Cloud's infrastructure mainly uses KVM virtualization technology rather than Docker container technology. KVM, the full name of Kernel-based Virtual Machine, is an open source, fully virtualized system virtualization technology that can divide a physical host into multiple virtual machines. Each virtual machine can run different operating systems and Applications can maximize the utilization of server resources.

In contrast, Docker technology is a container-based virtualization technology that can package applications and corresponding dependent libraries into a container to achieve rapid deployment and migration of applications. Although Docker can run multiple application containers on one host, it still requires host system resources to run the containers in the Docker host, so its resource utilization may be lower than KVM virtualization technology.

So why did Alibaba Cloud choose KVM instead of Docker? The following reasons may answer your doubts:

1. Stability and security: Although Docker, as a lightweight container technology, can reduce unnecessary system overhead, it is a relatively new technology. There are still some issues with security and stability. KVM virtualization technology creates virtual machines directly on the host hardware, so its security and stability are relatively higher.

2. Diversified support: KVM supports multiple operating systems, including Windows, Linux, and BSD, while Docker only supports Linux. For applications that need to support multiple operating systems simultaneously, KVM's availability is significantly higher.

3. Convenient management: KVM manages virtual machines through more mature tools such as Virtual Machine Management Tool (Virt-Manager), while Docker may require more manual operations, including manual copying and deployment of containers.

Of course, the advantages of Docker cannot be ignored, such as relatively fast running speed and relatively small resource usage. However, after overall consideration, Alibaba Cloud finally chose KVM virtualization technology, which is also This reflects Alibaba Cloud's robustness and prudence in overall architecture design.

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