Docker is a set of tools that package applications into an independent execution environment to reduce delivery and execution complexity.
Although virtual machines can also package applications, they need to emulate a complete hardware environment and operating system. Docker only establishes sandbox isolation on the operating system, so Docker can use system resources more efficiently. It uses Linux control groups (cgroup) to control resource usage, and namespace to create an independent environment, overlayFS stores application files. In these ways, the application is packaged as an independent container.
The use of containers when developing and deploying services has the following advantages: First of all, a consistent execution environment is used for development, testing and execution, which helps reduce problems caused by different environments. In terms of resource usage, because it uses the segmentation technology under Linux Kernel, it does not need to emulate a complete hardware like a virtual machine. More containers can be created on one host. The time required to open a container is much shorter than that of a virtual machine. When the application cannot handle a large amount of traffic, you can quickly open a new container to expand the processing capacity.
O'Prueba Technology Inc. uses Docker to enable ACTS services to be executed in a stable and reliable environment, providing customers with:
- Consultation on service containerization and container service configuration helps customers reduce the burden of transferring services to Docker.
- Use Docker to reduce development, integrate testing problems and reduce operating costs.