Author: Zen and the Art of Computer Programming
1 Introduction
Kubernetes (K8s) is a cloud-native container orchestration system. One of its main advantages is high scalability, high availability, and elasticity. Therefore, in an increasingly complex production environment, more and more enterprises have turned to K8s as a container platform for cluster management. K8s itself also provides complete operation and maintenance tools, such as Kubectl (command line tool), Dashboard (web interface), etc., so that users can easily manage the cluster. However, for novice to intermediate users, how to quickly and correctly deploy, configure, and monitor K8s clusters, especially in the face of complex network, storage, security and other requirements, has become a pain point.
Compared with traditional operation and maintenance personnel manually managing the installation, configuration, and upgrade of components on each host, the Kubernetes community has launched a set of open source automation tools—Kubespray, which automatically deploys and configures all components of the K8s cluster through ansible. Kubespray automates the automation process and simplifies the deployment process; at the same time, it provides detailed log output for troubleshooting or debugging; it also includes a complete health check mechanism to ensure the stable operation of the cluster. Therefore, Kubespray has been widely used by the community and adopted by many companies and organizations.
Today, the author will analyze the automated K8s cluster operation and maintenance tool represented by Kubespray, understand its working principle from a shallow level, and combine actual cases to analyze the workflow of each functional module of Kubespray in detail, and discuss the applicable scenarios and limitations of Kubespray sex. I hope this article can help readers understand the Kubespray tool more deeply, and further improve their own K8s cluster operation and maintenance capabilities.
2. Background introduction
What is Kubespray?
Kubespray is an open source automation tool for rapid deployment of Kubernetes (K8s) clusters. It utilizes Ans