Shulou(Shulou.com)06/02 Report--

1. What is Docker

The most widely used open source container engine, an operating system-level virtualization technology that relies on Linux kernel features: Namespace (resource isolation) and Cgroups (resource restriction), a simple application packaging tool

2. Docker design goal

Provide simple application packaging tools, developers and operators, responsibility logic separation, multi-environment consistency.

3. Basic composition of Docker

Docker Client: client Ddocker Daemon: daemon Docker Images: image Docker Container: container Docker Registry: image repository

4. Container VS virtual machine

Containers are also virtualized, but "lightweight" virtualization. Its purpose, like virtual machines, is to create an isolated environment. However, virtual machines are operating system-level resource isolation, while containers are essentially process-level resource isolation. Docker, as you often hear, is a tool for creating containers and an application container engine. Compared with traditional virtual machines, Docker has obvious advantages: it starts quickly, in seconds, and has a high utilization of resources (a host can run thousands of Docker containers at the same time). In addition, it takes up a small amount of space, and virtual machines generally take a few GB to dozens of GB, while containers only need MB or even KB.

5. Docker application scenarios

Application packaging and release application isolation continuous integration deployment microservices quickly build test environment to provide PaaS products (platform as a service)

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.