Kubernetes上採用服務網格效能研究

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姓名

林庭伃(Ting-Yu Lin) 查詢紙本館藏

畢業系所

資訊工程學系在職專班

論文名稱

Kubernetes上採用服務網格效能研究
(A Study on the Efficiency of Using Service Mesh on Kubernetes)

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摘要(中)

近年容器化（containerized）、微服務架構（microservices architecture）興起，軟體架構的複雜度日益增加，通常會使用容器管理工具自動部署及管理容器，開源的Kubernetes是目前最廣泛被使用的容器管理工具。以往叢集內服務間的同步溝通以HTTP/1.1（Hypertext Transfer Protocol Version 1.1）為主，隨著HTTP/2（Hypertext Transfer Protocol Version 2）的發布，許多系統改用HTTP/2做為服務間溝通的方式，期望透過持久性連線（persistent connection）提升傳輸效率，然而Kubernetes內部負載平衡器kube-proxy屬於network load balancer，只能處理L4的通訊協定，HTTP/2是在L7實作持久性連線的功能，透過此通訊協定連上Pod後，在後續的資料傳輸過程中沒辦法將流量導向到其他Pod，也失去自動擴展功能的意義。為解決此問題，許多文章建議使用服務網格（Service Mesh），透過其L7負載平衡器平衡流量，本篇論文設計數個實驗，比較Kubernetes使用kube-proxy與使用服務網格的進行負載平衡的效能差異，在Kubernetes使用服務網格平衡HTTP/2流量，須在合適的場景下才能提升系統效益。

摘要(英)

In recent years, with the rise of containerization and microservice architecture, software architecture is getting more complex. Container orchestration systems are used to automatically deploy and manage multiple containers. Kubernetes is an open-source project and the most widely used in the world. In the past, the synchronous communication between services in the cluster was mainly HTTP/1.1. With the release of HTTP/2, many systems switch to HTTP/2 as a way of communicating between services, in order to improve transmission efficiency through persistent connections. However, the internal load balancer kube-proxy of Kubernetes is a network load balancer. It only handles the L4 communication protocol. While HTTP/2 implements persistent connection in L7, once the connection is established, there′s no direct traffic to other Pods in the subsequent data transmission process. In order to solve this problem, many articles suggest using service mesh, which can balance traffic through sidecar proxy. This paper designed several experiments to compare the performance differences between Kubernetes with kube-proxy load balancer and Kubernetes with service mesh load balancer. Using service mesh to balance HTTP/2 traffic in Kubernetes can improve system efficiency only in suitable scenarios.

關鍵字(中)

★ Kubernetes
★ 服務網格
★ 負載平衡
★ HTTP/2

關鍵字(英)

★ Kubernetes
★ Service Mesh
★ Load balancing
★ HTTP/2

論文目次

摘要 i
Abstract ii
目錄 iii
圖目錄 v
表目錄 vi
第一章緒論 1
1.1 研究背景 1
1.2 研究動機 2
1.3 研究目的 3
1.4 章節架構 4
第二章背景知識與相關研究 5
2.1 Kubernetes 5
2.2 服務網格 7
2.3 HTTP演進 10
2.4 Locust 11
2.5 相關研究 12
第三章研究方法 14
3.1 實驗環境 14
3.2 系統設計 15
3.3 實驗方式 22
第四章實驗與討論 23
4.1 HTTP/1.1 實驗結果 23
4.1.1 瞬間流量 23
4.1.2 持續流量 25
4.1.3 穩定臨界點 28
4.2 HTTP/2 實驗結果 29
4.2.1 瞬間流量 29
4.2.2 持續流量 32
4.2.3 穩定臨界點 34
4.3 討論 35
第五章結論及未來研究方向 38
5.1 結論 38
5.2 未來研究方向 39
參考文獻 40

參考文獻

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指導教授

王尉任

審核日期

2022-9-16

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