《Kubernetes实战与深度解析》:构建全面的容器云平台指南

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Kubernetes权威指南深入剖析了如何构建和管理基于容器的云平台,特别强调了在实际操作中的落地与实践。该指南由邓德源编写,出自才云科技,适合不同层次的学习者阅读,无论是初学者还是经验丰富的工程师都能从中受益。 Kubernetes的核心组件包括: 1. Master节点:作为集群的控制中心,负责整体的协调和决策,管理多个Node节点,并维护整个系统的状态。 2. API Server:负责处理所有的API请求,包括创建、更新和删除资源,如Pods、Services和Deployments等。 3. Scheduler:根据资源需求和策略,动态调度Pod在合适的Node上运行,保证负载均衡。 4. Controller Manager:管理多个Controller(如ReplicaSet、Deployment等)的生命周期,确保服务的稳定性和一致性。 5. Node Controller:监控和管理Node的状态,例如健康检查和资源调整。 6. Daemon Set Controller:确保每个Node上都有相应的Pod副本,实现无服务器的部署模式。 7. Service Controller:负责创建和管理Service,用于内部和服务间通信,提供网络可达性。 8. Node:实际执行容器运行的机器,包含kube-proxy、kubelet和cAdvisor等工具。 9. kube-proxy:代理Node之间的网络流量,实现Pod间的服务发现和负载均衡。 10. kubelet:在Node上运行,管理容器实例、容器资源和与API Server的通信。 11. cAdvisor:监控Node上的资源使用情况,提供容器级别的资源统计和上报。 12. Container Runtime:支持如Docker和Rkt这样的容器运行时环境。 外部访问规则部分着重讲解了Service的nodePort机制,它允许通过Node的特定端口访问Service提供的服务。例如: - Rule1:允许来自Node的31080端口的TCP连接到Service A。 - Rule2:定义了一个概率为0.5的随机策略,将Service A的流量分发到Endpoint A或B。 - Rule3:针对两个不同的Endpoint,进行端口映射,将外部请求定向到特定内部IP和端口。 通过这些规则,Kubernetes允许用户灵活地配置和管理Service的访问策略,使得容器化的应用对外部世界更易接入和管理。这本指南详细介绍了Kubernetes架构的各个方面,从理论到实践,有助于读者构建高效、可扩展的容器云平台。
2018-04-12 上传
Kubernetes is often documented and approached from the perspective of someone just running software already built. Kubernetes may also be used to enhance the development process itself, enabling more consistent testing and analysis of written code so that developers can verify not only correctness, but efficiency as well. This book will introduce the key concepts of Kubernetes, linked with examples of how to deploy and use those with a bit of NodeJS and Python example code, so that a reader could quickly replicate and use that knowledge themselves in their development process. You will begin by setting up Kubernetes for development and packaging your code to run in Kubernetes. It will walk you through the set up and installation process before working with Kubernetes in the development environment. We will then take a deep dive into concepts like automating your build process, autonomic computing, debugging, integration testing and so on. This book will cover all the necessary concepts required for any developer to work with Kubernetes. Towards the end of this book, we will be covering few security best practices which will secure the developer environment. By the end of this book, you will be in a position to use Kubernetes in the development ecosystem. What you will learn Build your software into containers. Deploy and debug those containers with Kubernetes. Define and add configuration through Kubernetes. Declare how your application fits together, using internal and external services. Add feedback in your code to help Kubernetes manage your services. Monitor, measure your services through integration testing and in production deployments.