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Live-Migration in Cloud Computing Environment

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Live-Migration in Cloud Computing Environment Live-Migration in Cloud Computing Environment MOHAMMAD ALSELEK Outubro de 2016 Live-Migration in Private Cloud Computing Environment Mohammad Ibrahim AlSelek Dissertation for obtaining A Master's Degree in Computer Engineering, Specialization in Computer Systems Supervision by: ISEP: Dr. Jorge Pinto Leite Novabase: Eng. Pedro André & Eng. Jonathan Carvalho Porto, October 2016 i Resumo O tráfego global de IP aumentou cinco vezes nos últimos cinco anos, e prevê-se que crescerá três vezes nos próximos cinco. Já para o período de 2013 a 2018, anteviu-se que o total do tráfego de IP iria aumentar a sua taxa composta de crescimento anual (CAGR) em, aproximadamente, 3.9 vezes. Assim, os Prestadores de Serviços estão a sofrer com este acréscimo exponencial, que é proveniente do número abismal de dispositivos e utilizadores que estão ligados à Internet, bem como das suas exigências por vários recursos e serviços de rede (como por exemplo, distribuição de conteúdo multimédia, segurança, mobilidade, etc.). Mais especificamente, estes estão com dificuldades em: introduzir novos serviços geradores de receitas; e otimizar e adaptar as suas infraestruturas mais caras, centros de processamento de dados, e redes empresariais e de longa distância (COMpuTIN, 2015). Estas redes continuam a ter sérios problemas (no que toca a agilidade, gestão, mobilidade e no tempo despendido para se adaptarem), que não foram corrigidos até ao momento. Portanto, foram propostos novos modelos de Virtualização de Funções da Rede (NFV) e tecnologias de Redes de Software Definidos (SDN) para solucionar gastos operacionais e de capital não otimizado, e limitações das redes (Lopez, 2014, Hakiri and Berthou, 2015). Para se ultrapassar tais adversidades, o Instituto Europeu de Normas de Telecomunicações (ETSI) e outras organizações propuseram novas arquiteturas de rede. De acordo com o ETSI, a NFV é uma técnica emergente e poderosa, com grande aplicabilidade, e com o objetivo de transformar a maneira como os operadores desenham as redes. Isto é alcançado pela evolução da tecnologia padrão de virtualização TI, de forma a consolidar vários tipos de equipamentos de redes como: servidores de grande volume, routers, switches e armazenamento (Xilouris et al., 2014). Nesta dissertação, foram usadas as soluções mais atuais de SDN e NFV, de forma a produzir um caso de uso que possa solucionar o crescimento do tráfego de rede e a excedência da sua capacidade máxima. Para o desenvolvimento e avalização da solução, foi instalada a plataforma de computação na nuvem OpenStack, de modo a implementar, gerir e testar um caso de uso de Live Migration. Palavras-chave: Computação na Nuvem, OpenStack, Open Virtual Switch, Redes de Software definidos, Rota Virtual Distribuída, Virtualização, Virtualização de Funções da Rede ii iii Abstract Global IP traffic has increased fivefold over the past five years, and will continue increasing threefold over the next five years. The overall IP traffic will grow at a compound annual growth rate (CAGR) nearly 3.9-fold from 2013 to 2018. Service Providers are experiencing the exponential growth of IP traffic that comes from the incredible increased number of devices and users who are connected to the internet along with their demands for various resources and network services like multimedia content distribution, security, mobility and else. Therefore, Service Providers are finding difficult to introduce new revenue generating services, optimize and adapt their expensive infrastructures, data centers, wide-area networks and enterprise networks (COMpuTIN, 2015). The networks continue to have serious known problems, such as, agility, manageability, mobility and time-to-application that have not been successfully addressed so far. Thus, novel Network Function Virtualization (NFV) models and Software-defined Networking (SDN) technologies have been proposed to solve the non-optimal capital and operational expenditures and network’s limitations (Lopez, 2014, Hakiri and Berthou, 2015). In order to solve these issues, the European Telecommunications Standards Institute (ETSI) and other standard organizations are proposing new network architecture approaches. According to ETSI, The Network Functions Virtualization is a powerful emerging technique with widespread applicability, aiming to transform the way that network operators design networks by evolving standard IT virtualization technology to consolidate many network equipment types: high volume servers, routers, switches and storage (Xilouris et al., 2014). In this thesis, the current Software-Defined Networking (SDN) and Network Function Virtualization (NFV) solutions were used in order to make a use case that can address the increasing of network traffic and exceeding its maximum capacity. To develop and evaluate the solution, OpenStack cloud computing platform was installed in order to deploy, manage and test a Live-Migration use-case. Keywords: Network Function Virtualization, Software Defined Network, OpenStack, Virtualization, Cloud Computing, Open Virtual Switch, Distributed Virtual Route. iv v INDEX LIST OF FIGURES ................................................................................................................................ VIII LIST OF TABLES ..................................................................................................................................... X 1. INTRODUCTION ............................................................................................................................ 1 1.1 MOTIVATION - PROBLEM DESCRIPTION .............................................................................................. 1 1.2 OBJECTIVES ................................................................................................................................... 2 1.3 VALUE PROPOSITION ....................................................................................................................... 3 1.4 ORGANIZATION .............................................................................................................................. 3 2. STATE OF THE ART ........................................................................................................................ 5 2.1 INTRODUCTION .............................................................................................................................. 5 2.2 CLOUD COMPUTING CONCEPT ........................................................................................................... 5 2.3 CLOUD COMPUTING TECHNOLOGIES .................................................................................................. 7 2.4 CLOUD COMPUTING SERVICE MODELS ................................................................................................ 8 2.4.1 Infrastructure as a Service (IaaS) .......................................................................................... 9 2.4.2 Platform as a Service (PaaS).................................................................................................. 9 2.4.3 Software as a Service (SaaS) ............................................................................................... 10 2.5 CLOUD COMPUTING DEPLOYMENT MODELS ...................................................................................... 10 2.5.1 Private Clouds...................................................................................................................... 10 2.5.2 Community Clouds .............................................................................................................. 12 2.5.3 Public Clouds ....................................................................................................................... 13 2.5.4 Hybrid Clouds ...................................................................................................................... 14 2.6 CLOUD COMPUTING CHALLENGES, CHARACTERISTICS AND BENEFITS ...................................................... 14 2.6.1 Cloud computing Challenges ............................................................................................... 14 2.6.2 Cloud computing Characteristics ......................................................................................... 17 2.6.3 Cloud computing Benefits ................................................................................................... 18 2.7 CLOUD COMPUTING BUSINESS PERSPECTIVE ...................................................................................... 19 2.7.1 Stakeholders ........................................................................................................................ 19 2.7.2 Service Life-Cycle ................................................................................................................. 20 2.7.3 Service Level Agreements .................................................................................................... 21 2.8 MOVING TOWARDS SOFTWARE-DEFINING SOLUTIONS......................................................................... 23 2.8.1 Virtualization ....................................................................................................................... 23 2.8.1.1 The Architecture ....................................................................................................................... 24 2.8.1.2 Advantages/Disadvantages ....................................................................................................... 26 2.8.1.3 Hypervisor technology .............................................................................................................
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