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This article mainly explains "what is the impact of Docker container on operation and maintenance employment". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the impact of Docker container on operation and maintenance employment".

The first aspect is the performance of containers

For traditional operators, docker is easy to be confused with virtual machines, which is a misunderstanding. Operators must pay attention to these basic concepts in the learning process.

The virtual machine has an independent kernel, independent user space, process calls will pass through the virtual machine kernel, and then through the host kernel, the return is the same, with one more layer of calls.

The container is a shared host kernel, and the container only provides a user space. Process calls will directly call the host kernel without a layer of calls, so the efficiency of the container is very high, which is infinitely close to the native operating system calls.

Second, the utilization rate of container resources

The container has no extra overhead of the hypervisor, shares the operating system with the underlying operating system, has better performance and lower system load, can run more application instances under the same conditions, and can make more full use of system resources compared with virtual machines.

The third aspect is the isolation of containers

If you run multiple versions of a traditional host or virtual machine in an environment that is complex to configure and prone to errors, this problem will not exist after containerization. Each application can be packaged into a separate container with independent user space and sharing host memory and cpu resources.

Fourth, the start-up speed is fast.

The biggest advantage of container technology is that creating container instances is much faster than creating virtual machine examples. Container lightweight scripts can reduce overhead in terms of performance and size, and can be started in seconds.

Fifth, cross-platform and continuous deployment and testing

Developers can carry out docker packaging testing on windows, which eliminates the environmental differences between online and offline, and ensures the environmental consistency and standardization of the application life cycle. Developers use images to build a standard development environment, and after development is completed, they migrate by encapsulating images of complete environments and applications, so that testers and operators can directly deploy software images for testing and release, greatly simplifying the process of continuous integration, testing and release. It really realizes the phrase "build once, run everywhere" on the official website of docker.

Thank you for your reading. the above is the content of "what is the impact of Docker container on operation and maintenance employment". After the study of this article, I believe you have a deeper understanding of the impact of Docker container on operation and maintenance employment, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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