Openstack運算架構及虛擬機器 高可靠度保護機制

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姓名

李祥麒(Shiang-Chi Lee) 查詢紙本館藏

畢業系所

軟體工程研究所

論文名稱

Openstack運算架構及虛擬機器高可靠度保護機制
(High Availability protection for Openstack Compute Architecture and User VM)

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摘要(中)

隨著雲端運算技術的普及，越來越多企業或個人用戶都選擇將其網路服務建置在雲端環境運行，得益於雲端環境的彈性和方便性，使用者只需在網路上註冊虛擬機即可立即部屬自己的網路服務，不僅節省了維運機房的成本，也可以更有效的利用硬體資源。Openstack即是建置相關雲端環境的IaaS系統。當企業或個人使用戶註冊了虛擬機，若是虛擬機因為機器故障導致服務中斷，對用戶來說每分鐘的故障意味著每分鐘都在損失金錢，所以在雲端環境提供系統高可靠性(High Availability, HA)即成為很重要的功能。
Openstack雲端環境建置軟體從2010發表至今，並沒有針對虛擬機器HA提供一個有效的方法。因此中央大學資訊工程研究所的平行與分散式運算實驗室提出了一個針對在Openstack下提供軟體定義運算叢集(Software-Defined High Availability Cluster, SDHAC)，透過邏輯性的切割運算資源成不同的SDHAC提供自動偵測運算資源故障同時復原虛擬機器的機制，並搭配IPMI(Intelligent Platform Management Interface)提供硬體感測器的監控。本研究承襲此種架構，提出一種根據錯誤彼此相依性架構的階層式偵測流程，並提供針對Controller HA的保護，確保使用者不會因為Controller的故障而失去Openstack管理的功能，同時對外提供REST API (Representational State Transfer Application Programming Interface, REST API)的支援，方便外部系統透過統一的介面存取HA系統服務。

摘要(英)

More and more enterprises and users tend to deploy their web services on cloud platform because of the increasing popularity in cloud computing technology. Benefited from the elastic and easy-to-use features on the cloud platform, users only need to register virtual machine by their hardware requirements then they can start to build their own web service. By this way, users can not only save the money from use the cloud platform rather than maintain their own physical machines but also make good use of the physical machines. Openstack is the kind of software that can build a cloud platform. When the physical machine encounters some errors in terms of the hardware and software then the virtual machine will also be inaccessible subsequently which will cause the money lose to the industry owners and users. So, high availability becomes a serious function in building a cloud platform.

Openstack do not provide a formal solution for virtual machine HA since its released in 2012. NCU-PDC lab proposed a research about SDHAC(Software-Defined High Availability Cluster) based on Openstack cloud platform which will divide the compute resources to different SDHAC and combined with the IPMI hardware and software services level detection mechanism to decide the compute resource is in failure state or not. Once there are some errors in the compute resource they will start to recover it. This research propose and implement a hierarchically failure detection method based on the SDHAC and IPMI detection and provide the protection for the controller services which make sure that when some errors happens in the controller, the user can keep accessing to the controller services. Besides, this research supports REST API (Representational State Transfer Application Programming Interface) which allows external requests use the REST standard to perform HA functions.

關鍵字(中)

★ 雲端運算
★ Openstack
★ 高可靠性
★ 軟體定義叢集
★ 虛擬機器保護
★ Controller保護

關鍵字(英)

論文目次

摘要 I
Abstract II
目錄 III
圖目錄 V
表目錄 VII
第一章緒論 1
1-1 研究背景 1
1-2 研究動機 4
1-3 研究目的 5
1-4研究貢獻 7
1-5 論文架構 8
第二章相關研究 9
2-1 背景知識 9
2-1-1 Intelligent Platform Management 9
2-1-2 Openstack 11
2-1-3 DRBD 12
2-1-4 REST 13
2-1-5 Openstack HA 13
2-2 相關平台HA機制研究 16
2-2-1 Compute pool HA 16
2-2-2 Controller HA 17
2-2-3 Related Detection methods 19
2-3 相關文獻探討 21
第三章系統設計 22
3-1 Compute Pool HA 22
3-1-1 系統架構 22
3-1-2 軟體定義高可靠度叢集 25
3-1-3 錯誤偵測機制 26
3-1-4 錯誤復原機制 30
3-2 Controller HA 33
3-2-1 系統架構 33
3-2-2 Controller HA狀態機圖 35
3-2-3 錯誤偵測機制 36
3-2-4 錯誤回復流程 38
第四章實驗環境與測量 41
4-1 compute pool HA 實驗 41
4-1-1 實驗環境 41
4-1-2 實驗環境假設 43
4-1-3 實驗案例 44
4-1-4 實驗結果 45
4-2 Controller HA 實驗 50
4-2-1 實驗環境 50
4-2-2 實驗環境假設 51
4-2-3 實驗案例 52
4-2-4 實驗結果 53
第五章結論與未來研究 59
參考文獻 60

參考文獻

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指導教授

梁德容(Deron Liang)

審核日期

2018-7-25

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