利用K8S實現高可靠應用
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This document discusses using Kubernetes to implement highly reliable applications. It begins with an agenda that includes an overview of microservices, an introduction to Kubernetes, and using NodeRed and Kubernetes to build a chatbot. It then provides background on microservices architecture, explaining how applications have evolved from huge monolithic applications to independent microservices that can be deployed and updated more quickly. It introduces Kubernetes concepts like pods, deployments, statefulsets, daemonsets and jobs. It also discusses using Kubernetes to run NodeRed chatbot containers as a deployment, including load balancing, self-healing and scaling benefits. Challenges with logging and maintaining chat conversations across containers are noted.
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利用K8S實現高可靠應用
- 1. 利用 Kubernetes 實現 高可靠應用 alfieYFC inwinSTACK alfie.yfc inwinSTACK Alfie Chen 2017/11/21 alfie.c@inwinstack.com
- 2. Agenda World of Microservices Kubernetes for Beginners NodeRed Chatbot w/ K8S
- 3. World of Microservices Virtual Machines, Containers, etc.
- 4. App Development Changes • Huge Applications • Hours to Build • Huge Downtime • Microservices • Container Deployment • Independent Deployments • Fast Version Releases
- 5. What is Microservices? Kitchen Office Men’s Room Women’s Room Frontdesk Dining Area entrance
- 6. What is Microservices? Kitchen Office Men’s Room Women’s Room Frontdesk Dining Area entrance
- 7. Nginx (Reverse Proxy Service) Bootstrap (Front-end Framework) Rails (Web Framework) Sidekiq (Background Processing Framework) Redis (Storage) Postgresql (Database) Elastic (DB Search Engine) What is Microservices?
- 8. What is Microservices? Physical Server VM VM VM VM Hypervisor Physical Server Software Program 010101010101010 101010101010101 010101010101010 101010101010101 010101010101010 010101010101010 101010101010101 010101010101010 101010101010101 010101010101010 010101010101010 101010101010101 010101010101010 101010101010101 010101010101010 010101010101010 101010101010101 010101010101010 101010101010101 010101010101010
- 10. What is Microservices? Kitchen Office Men’s Room Women’s Room Frontdesk Dining Area entrance
- 11. What is Microservices? Physical Server Software Program Physical Server VM VM VM VM Hypervisor Physical Server Container Container Container Container Container Engine (Docker)
- 12. Kitchen Office Men’s Room Women’s Room Frontdesk Dining Area entrance What is Microservices? Kitchen Office Men’s Room Women’s Room Frontdesk Dining Area entrance Physical Server Container Container Container Container Container Engine (Docker)
- 13. Kubernetes for Beginners (kinda..)
- 14. Kubernetes Cluster Physical Server Minion kube-proxykubelet Pod Container Container Pod Container Pod Container Pod Container Container Physical Server Minion kube-proxykubelet Pod Container Container Pod Container Pod Container Container 10G Switch Network:172.24.0.0/24 Gateway:172.24.0.254 Physical Server Master Controller Manager etcdSchedulerAPI Server
- 15. Kubernetes Cluster Physical Server Minion kube-proxykubelet Pod Container Container Pod Container Pod Container Pod Container Container Physical Server Minion kube-proxykubelet Pod Container Container Pod Container Pod Container Container Physical Server Master Controller Manager etcdSchedulerAPI Server
- 16. Concepts & Terms • Controllers o Deployment (deploy) o Stateful Set o Daemon Set (ds) o Jobs https://kubernetes.io/docs/concepts/
- 17. Concepts & Terms • Deployment (deploy) o Stateless o Availability > Consistency o Web Frontends o Rolling Update
- 18. Concepts & Terms • Deployment (deploy) o Stateless o Availability > Consistency o Web Frontends
- 19. Concepts & Terms • Stateful Set o Persistent data o Availability < Consistency o Each has its own identity o Databases, Message queues
- 20. Concepts & Terms • Daemon Set o Background process o One pod per node o Node labels o Cluster storage, logs, node monitoring
- 21. Concepts & Terms • Jobs o Batch Pattern o Run in parallel o Run to completion (then exit) o Independent but related processes
- 22. NodeRed Chatbot w/ K8S Running FB RedBot containers as a Deployment
- 23. Why Chatbots? • Make the Most of Emerging Trends • Access Information Faster • Consistent & Controllable Conversation • Integrate Social Media and Sales • Informal Brand Chats
- 24. VM Architecture 1 LoadBalancer VMVM VMVM VMVM Response
- 25. VM Architecture 2 <func> Pass Master Response Only VM VM MQ Master Slave Response
- 27. K8S Architecture Benefits: • Resource Utilization • Scalability • Auto Load-balance • Self-healing Challenges: • Logging • Chat Conversation Who am I talking to?!!! Hi! My name is Kamekube! Hi! What’s your name?
- 28. Possible Solution? • Load-balance? • Cache? Minion Pod1 Pod2 Pod3 Pod4 DB [Username:Conv0001:Bot3] Pod MB Pod MB Pod MB Pod MB Pod MB Webhook Load-Balance / Node-Port Service
- 29. What else? I’m Leaving it to the Smarter People (YOU!)
- 30. www.inwinstack.com Thank You! 迎 棧 科 技 股 份 有 限 公 司