V2023 1 #42
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| # Le Cloud : vue d’ensemble | ||
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| ### Le cloud, c’est large ! | ||
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| - Stockage/calcul distant (on oublie, cf. externalisation) | ||
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| - Virtualisation++ | ||
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| - Abstraction du matériel (voire plus) | ||
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| - Accès normalisé par des APIs | ||
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| - Service et facturation à la demande | ||
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| - Flexibilité, élasticité | ||
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| ### WaaS : Whatever as a Service | ||
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| - IaaS : Infrastructure as a Service | ||
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| - PaaS : Platform as a Service | ||
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| - DBaaS : Data Base as a Service | ||
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| - KaaS : Kubernetes as a Service | ||
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| - SaaS : Software as a Service | ||
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| ### Le cloud en un schéma | ||
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| {height="400px"} | ||
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| ### Pourquoi du cloud ? Côté technique | ||
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| - Abstraction des couches basses | ||
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| - On peut tout programmer à son gré (API) | ||
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| - Permet la mise en place d’architectures scalables | ||
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| ### Virtualisation dans le cloud | ||
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| - Le cloud IaaS repose souvent sur la virtualisation | ||
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| - Ressources compute : virtualisation | ||
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| - Virtualisation complète | ||
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| - Virtualisation conteneurs | ||
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| ### Orchestration des ressources ? | ||
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| - Groupement fonctionnel de ressources : micro services | ||
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| - Infrastructure as Code : Définir toute une infrastructure dans un seul fichier texte de manière déclarative | ||
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| - Scalabilité : passer à l'échelle son infrastructure en fonction de différentes métriques. | ||
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| ### Déploiment des application dans le cloud | ||
| - Les conteneurs de nos jours sont partout | ||
| - L'outil de-facto pour le déploiment des applications basées sur les conteneurs est Kubernetes | ||
| - Kubernetes est utilisé partout ! | ||
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| # Les conteneurs : Introduction | ||
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| ### Déploiement des applications | ||
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| - Cycle de vie d'une application | ||
| - Plusieurs environnements: | ||
| - local | ||
| - test | ||
| - production | ||
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| ### Déploiement des applications | ||
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| - Chaque environnement est différent des autres: | ||
| - système d'exploitation | ||
| - dépendances | ||
| - configuration | ||
| - réseau | ||
| - ... | ||
| - Des pré-requis | ||
| - Conflit éternel entre les devs et les ops: "ça fonctionnait en local !" | ||
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| ### Ere de la virtualisation ! | ||
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| - Environnement isolé => plus de sécurité | ||
| - Création de plusieurs VMs sur la même machine | ||
| - Snapshot des VMs | ||
| - Portabilité | ||
| - Dupliquer les VMs | ||
| - S'assurer d'avoir le même comportement n'importe où | ||
| - Problème des dépendances/pré-requis | ||
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| ### Problèmes des VMs | ||
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| - Les VMs sont lourds | ||
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| - Un système d'exploitation ! | ||
| - La taille d'une VMs est de l'ordre des Go | ||
| - Difficulté de partage des VMs | ||
| - L'arrêt/relance des VMs prend beaucoup de temps | ||
| - Le process de création d'une VM est long | ||
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| ### Problèmes des VMs | ||
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| - Couche d'hyperviser et allocation des ressources | ||
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| - L'application avec toutes les dépendances sont installés dans une VM | ||
| - Pas de séparation des services | ||
| - Conflit des dépendances des services | ||
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| ### Les conteneurs ! | ||
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| - Sont legers de l'ordre des Mo | ||
| - Se connectent directement au kernel du système | ||
| - Se lancent rapidement | ||
| - Facile à partager | ||
| - Signle purpose | ||
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| ### VM Vs Conteneurs | ||
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|  | ||
| <!-- source: https://dzone.com/articles/container-technologies-overview --> | ||
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accent sur le È