pr\u00e9sentent<\/p>\n\n\n\n
Autoris\u00e9 \u00e0 pr\u00e9senter ses travaux en vue de l\u2019obtention du Doctorat de l’Institut Polytechnique de Paris, pr\u00e9par\u00e9 \u00e0 T\u00e9l\u00e9com SudParis en :<\/p>\n\n\n\n
le MERCREDI 9 OCTOBRE 2024 \u00e0 16h00<\/p>\n\n\n\n
\u00e0<\/p>\n\n\n\n
Amphith\u00e9\u00e2tre Rose Dieng Kuntz
Telecom Sud Paris 19 Pl. Marguerite Perey, 91120 Palaiseau<\/p>\n\n\n\n
Membres du jury :<\/strong><\/p>\n\n\n\n M. Walid GAALOUL<\/strong>, Professeur, T\u00e9l\u00e9com Sud Paris, FRANCE – Directeur de these Invit\u00e9s:<\/strong><\/p>\n\n\n\n Mme. Roua Touihri<\/strong>, Chercheure associ\u00e9e, Samovar, France –Co-encadrante de th\u00e8se<\/p>\n\n\n\n R\u00e9sum\u00e9 :<\/strong><\/p>\n\n\n\n A mesure que le cloud computing se d\u00e9veloppe, de nouveaux besoins clients naissent, surpassant les capacit\u00e9s d\u2019un unique fournisseur. Naturellement, les clients se sont int\u00e9ress\u00e9s \u00e0 la consommation de services de plusieurs fournisseurs. Ce paradigme apportent un certains nombre d’avantages. Cependant, le multi-cloud soul\u00e8ve des verrous inh\u00e9rents \u00e0 la multiplicit\u00e9 de fournisseurs et \u00e0 l’h\u00e9t\u00e9rog\u00e9n\u00e9it\u00e9 de leurs services. En outre, la gestion de la qualit\u00e9 de service, le maintien et le suivi des objectifs de niveau de service, est rendue d’autant plus complexe en raison de la nature distribu\u00e9e du contexte multi-cloud et de la d\u00e9pendance qui existe entre les diff\u00e9rents composants. Afin de surmonter ces difficult\u00e9s, nous visons dans cette th\u00e8se \u00e0 (1) proposer un mod\u00e8le de description de SLA multi-cloud dynamique, (2) proposer un processus de validation de la coh\u00e9rence pr\u00e9alable \u00e0 la mise en \u0153uvre des SLAs multi-cloud dynamique et (3) proposer un processus de v\u00e9rification post-mise en \u0153uvre des SLAs multi-cloud dynamique. Pour le premier objectif, nous proposons un mod\u00e8le de description de SLA multi-cloud dynamique compos\u00e9 d’un global-SLA permettant de repr\u00e9senter des objectifs globaux au syst\u00e8me multi-cloud, de sub-SLAs permettant de repr\u00e9senter des objectifs locaux au niveau des composants du syst\u00e8me multi-cloud et une machine \u00e0 \u00e9tat permettant la formalisation de reconfiguration des services cloud pour adresser l’aspect dynamique. Pour le second objectif, nous proposons une v\u00e9rification de la coh\u00e9rence pr\u00e9alable \u00e0 la mise en \u0153uvre des SLA multi-cloud dynamiques, identifiant et rapportant les SLOs incoh\u00e9rents. Nous proposons une v\u00e9rification en 2 \u00e9tapes: (1) entre les global-SLAs et les sub-SLAs en se basant sur une m\u00e9thode d’agr\u00e9gation de SLOs et (2) entre les sub-SLAs et strat\u00e9gies de reconfiguration en se basant sur une technique de traduction de SLA. Pour le troisi\u00e8me objectif, portant sur le reporting du SLA multi-cloud dynamique apr\u00e8s leur mise en \u0153uvre par les fournisseurs de service cloud. Cette contribution, bas\u00e9e sur des techniques de fouille de processus comprenant la collecte et le pr\u00e9-traitement des journaux d’\u00e9v\u00e9nements produits durant la mise en \u0153uvre, afin de les comparer avec le SLA multi-cloud dynamique \u00e9tabli et de signaler les \u00e9ventuelles violations de SLA aux architectes cloud. Nous \u00e9valuons cette \u00e9tape avec des journaux d’\u00e9v\u00e9nements collect\u00e9s aupr\u00e8s des 3 plus grands fournisseurs de services cloud: AWS, GCP et Azure.<\/p>\n\n\n\n Abstract :<\/strong><\/p>\n\n\n\n As cloud computing continues to grow, new client needs arise, surpassing the capabilities of a single provider. Naturally, clients have become interested in consuming services from multiple providers. This paradigm brings a number of advantages. However, multi-cloud raises challenges inherent to the multiplicity of providers and the heterogeneity of their services. Moreover, managing the quality of service, maintaining and monitoring service level objectives, is made more complex due to the distributed nature of the multi-cloud context and the dependencies between different components. To overcome these difficulties, in this thesis, we aim to (1) propose a model for dynamic multi-cloud SLA description, (2) propose a process for pre-implementation consistency validation of dynamic multi-cloud SLAs, and (3) propose a process for post-implementation verification of dynamic multi-cloud SLAs. To achieve the first objective, we propose a model for dynamic multi-cloud SLA description composed of a global-SLA to represent global objectives for the multi-cloud system, sub-SLAs to represent local objectives at the component level of the multi-cloud system, and a state machine to formalize the reconfiguration of cloud services to address the dynamic aspect. To achieve the second objective, we propose a pre-implementation consistency verification of dynamic multi-cloud SLAs, identifying and reporting inconsistent SLOs. We propose a two-step verification: (1) between the global-SLAs and the sub-SLAs based on an SLO aggregation method, and (2) between the sub-SLAs and reconfiguration strategies based on an SLA translation technique. To achieve the third objective, focused on reporting the dynamic multi-cloud SLA after implementation by cloud service providers, this contribution is based on process mining techniques, including the collection and pre-processing of event logs produced during the implementation, to compare them with the established dynamic multi-cloud SLA and report any SLA violations to cloud architects. We evaluate this step with event logs collected from the 3 largest cloud service providers: AWS, GCP, and Azure.<\/p>\n","protected":false},"excerpt":{"rendered":" L’Ecole doctorale : Ecole Doctorale de l’Institut Polytechnique de Paris et le Laboratoire de recherche SAMOVAR – Services r\u00e9partis, Architectures, Mod\u00e9lisation, Validation, Administration des R\u00e9seaux pr\u00e9sentent l\u2019AVIS DE SOUTENANCE de Monsieur Jeremy MECHOUCHE Autoris\u00e9 \u00e0 pr\u00e9senter ses travaux en vue de l\u2019obtention du Doctorat de l’Institut Polytechnique de Paris, pr\u00e9par\u00e9 \u00e0 T\u00e9l\u00e9com SudParis en : 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Mme Isabelle CHRISMENT<\/strong>, Professeure, Telecom Nancy, FRANCE – Rapporteur
Mme Raja CHIKY<\/strong>, Professeure, I3L Limoges, FRANCE – Rapporteur
M. Mohamed SELLAMI<\/strong>, Ma\u00eetre de conf\u00e9rences, T\u00e9l\u00e9com Sud Paris, FRANCE – Co-encadrant de these
M. Djamal ZEGHLACHE<\/strong>, Professeur, Telecom Sud Paris, FRANCE – Examinateur
M. Sami YANGUI<\/strong>, Ma\u00eetre de conf\u00e9rences, INSA Toulouse, FRANCE – Examinateur<\/p>\n\n\n\n\u00ab G\u00e9rer et assurer la qualit\u00e9 de services de ressources dans un environnement multi-cloud \u00bb<\/h2>\n\n\n\n
pr\u00e9sent\u00e9 par Monsieur Jeremy MECHOUCHE<\/h2>\n\n\n\n