Shulou(Shulou.com)05/31 Report--

This article mainly introduces "what is Docker Swarm and Kubernetes". In daily operation, I believe many people have doubts about what Docker Swarm and Kubernetes are. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the questions of "what are Docker Swarm and Kubernetes?" Next, please follow the editor to study!

Before going any further, we need to understand what a "container" is.

The container is a lightweight, independent image that can be used to implement software and contains everything you need to run the application successfully. It works like a virtual machine (VM), but it only contains the necessary libraries and settings to execute the application.

Both Docker Swarm and Kubernetes provide containers for deploying and isolating software in the same infrastructure, and there are also good ways to handle applications, but there are some key differences between the two:

Many engineers like to work on Docker Swarm because it is easy to use and implement, but if you choose Docker Swarm, will it be better than Kubernetes?

You need to know what Docker Swarm and Kubernetes are first.

Docker Swarm

Docker is an open source platform, which may mean a company, a container platform or a Docker cluster. This article discusses container technology, so the Docker mentioned here actually means that Docker Swarm,Docker Swarm is a flexible container storage platform known for its powerful ease of use. On the other hand, Docker Swarm is entirely designed to manage Docker engine clusters.

Kubernetes

Kubernetes is a popular open source container storage program built by Google to manage its system. It is an open source, extensible, powerful tool that can handle containers while providing great scalability and automation.

Last year, Pokemon Go, as one of the popular games, also used Kubernetes to manage their products and rapid expansion. The success of Pokemon Go, its own rapid spread, made people really feel the power of Kubernetes.

Contrast

Security and Settin

Each tool has its own installation and setup process, and managing containers in the cloud or other basic settings depends largely on how it is built. By contrast, Kubernetes is not as user-friendly as Docker Swarm.

Kubernetes: when it comes to installation and setup, it poses some challenges for developers. First of all, you need to reconfigure each operating system (OS). Online documentation is a lot of help in this process, but when building a custom environment, it can become very complicated, and the only solution is to search Google. Another key reason why Kubernetes is not easy to install and set up requires planning before implementation, a lot of time and effort to plan nodes, and manual integration, because not everything can be automated, which makes Kubernetes difficult to manage.

Docker Swarm: thanks to its command line interface (CLI), Docker Swarm is easy to set up and manage. It uses semantics similar to CLI and GIT, which makes it easy for application developers to integrate new technologies into workflows. Compared with Kubernetes, there is no need to learn new things when implementing containers for new operating systems and environments.

To sum up, Docker Swarm has a slight advantage in installation and setup.

Monitoring and logging

Once the container is deployed, the next step is to monitor the node cluster, and both Kubernetes and Docker Swarm have successfully provided a good monitoring and logging process.

For Kubernetes, there is more than one way to monitor and log clusters. Here are some methods for reference:

Monitoring: Grafana, Heapster, or Influx

Logging: Kibana (ELK) or Elasticsearch

For Docker Swarm, there are no built-in libraries or processes to monitor or record, but developers can use third-party applications to achieve their goals. Third-party monitoring tools are: Sumo Logic, Retrace, Reimann, and DataDog.

Scalability and performance

The most basic principle of using container services is the scalability they provide. Both platforms are highly scalable and support thousands of containers at a specific time. At first, Docker Swarm does not have good support for a large number of containers. However, after the new version, it can support as many containers as Kubernetes. Both systems support 1000 node clusters, which can support up to 30, 000 containers.

In terms of performance, Kubernetes has a good foundation for Dokcer Swarm. However, studies done by independent agencies have shown that Docker Swarm can run containers five times faster than Kubernetes.

KubernetesDocker Swarm is the most mature solution in the market. Docker Swarm provides good features, but is limited by its API. Kubernetes is also the most popular solution on the market. RDocker Swarm's market Kubernetes is relatively weak. Kubernetes is difficult to install and configure. Setting up and installing Docker Swarm is easy. Kubernetes provides built-in logging and monitoring tools. Docker only supports third-party monitoring and logging tools. Automatic quantitative CPU utilization is a big factor. Services can be extended manually. At this point, the study of "what is Docker Swarm and Kubernetes" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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