{"id":656,"date":"2024-07-22T20:37:41","date_gmt":"2024-07-22T20:37:41","guid":{"rendered":"https:\/\/dockerpros.com\/?post_type=glossary&p=656"},"modified":"2024-07-23T12:39:44","modified_gmt":"2024-07-23T12:39:44","slug":"kubernetes","status":"publish","type":"glossary","link":"https:\/\/dockerpros.com\/fr\/wiki\/kubernetes\/","title":{"rendered":"Kubernetes"},"content":{"rendered":"

Kubernetes: Orchestrating Containerized Applications<\/h1>\n

Kubernetes, souvent abr\u00e9g\u00e9 en K8s, est un syst\u00e8me open source. conteneur<\/a><\/span>Containers are lightweight, portable units that encapsulate software and its dependencies, enabling consistent execution across different environments. They leverage OS-level virtualization for efficiency. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> orchestration<\/a><\/span>L'orchestration d\u00e9signe la gestion et la coordination automatis\u00e9es de syst\u00e8mes et de services complexes. Elle optimise les processus en int\u00e9grant diverses composantes, en garantissant un fonctionnement efficace et une utilisation optimale des ressources. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> platform designed to automate the deployment, scaling<\/a><\/span>Scaling refers to the process of adjusting the capacity of a system to accommodate varying loads. It can be achieved through vertical scaling, which enhances existing resources, or horizontal scaling, which adds additional resources. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span>, and management of containerized applications. Originally developed by Google, Kubernetes has become a de facto standard for conteneur<\/a><\/span>Containers are lightweight, portable units that encapsulate software and its dependencies, enabling consistent execution across different environments. They leverage OS-level virtualization for efficiency. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> orchestration<\/a><\/span>L'orchestration d\u00e9signe la gestion et la coordination automatis\u00e9es de syst\u00e8mes et de services complexes. Elle optimise les processus en int\u00e9grant diverses composantes, en garantissant un fonctionnement efficace et une utilisation optimale des ressources. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span>, providing a robust framework for managing applications across clusters of hosts, ensuring high availability, and offering sophisticated load balancing<\/a><\/span>L'\u00e9quilibrage de charge est une technique essentielle de gestion de r\u00e9seau qui distribue le trafic entrant sur plusieurs serveurs. Cela garantit une utilisation optimale des ressources, minimise le temps de r\u00e9ponse et am\u00e9liore la disponibilit\u00e9 des applications. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> and service<\/a><\/span>Le service fait r\u00e9f\u00e9rence \u00e0 l'acte de fournir une assistance ou un soutien pour r\u00e9pondre \u00e0 des besoins ou des exigences sp\u00e9cifiques. Dans divers domaines, il englobe le service client, le support technique et les services professionnels, en mettant l'accent sur l'efficacit\u00e9 et la satisfaction de l'utilisateur. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> discovery. This article delves into the foundational concepts, architecture, features, and best practices for using Kubernetes effectively.<\/p>\n

L'\u00c9volution de l'Orchestration de Conteneurs<\/h2>\n

L'essor des conteneurs a transform\u00e9 le paysage du d\u00e9veloppement et du d\u00e9ploiement d'applications. Les conteneurs encapsulent une application et ses d\u00e9pendances, fournissant un environnement d'ex\u00e9cution l\u00e9ger, portable et coh\u00e9rent. Cependant, \u00e0 mesure que les organisations ont commenc\u00e9 \u00e0 adopter les conteneurs en production, il est devenu \u00e9vident que la gestion d'un grand nombre de conteneurs sur de nombreux h\u00f4tes constituait un d\u00e9fi complexe.<\/p>\n

Prior to Kubernetes, several orchestration<\/a><\/span>L'orchestration d\u00e9signe la gestion et la coordination automatis\u00e9es de syst\u00e8mes et de services complexes. Elle optimise les processus en int\u00e9grant diverses composantes, en garantissant un fonctionnement efficace et une utilisation optimale des ressources. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> solutions were available, such as Apache Mesos, Docker Swarm<\/a><\/span>Docker Swarm est un outil d'orchestration de conteneurs qui permet de g\u00e9rer un cluster de moteurs Docker. Il simplifie la mise \u00e0 l'\u00e9chelle et le d\u00e9ploiement, en assurant haute disponibilit\u00e9 et \u00e9quilibrage de charge entre les services. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span>, and cloud-native solutions offered by providers like AWS and Google Cloud. However, Kubernetes emerged as a frontrunner due to its rich feature set, strong community support, and flexibility. Its design philosophies, focusing on declarative configuration and automation, set it apart from other orchestration<\/a><\/span>L'orchestration d\u00e9signe la gestion et la coordination automatis\u00e9es de syst\u00e8mes et de services complexes. Elle optimise les processus en int\u00e9grant diverses composantes, en garantissant un fonctionnement efficace et une utilisation optimale des ressources. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> tools.<\/p>\n

Concepts de base<\/h2>\n

1. Clusters<\/h3>\n

Au c\u0153ur de son fonctionnement, Kubernetes repose sur une architecture de cluster. Un cluster Kubernetes se compose d'un ma\u00eetre n\u0153ud<\/a><\/span>Node, or Node.js, is a JavaScript runtime built on Chrome's V8 engine, enabling server-side scripting. It allows developers to build scalable network applications using asynchronous, event-driven architecture. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span><\/strong> et multiples n\u0153uds de travail<\/strong>. The master n\u0153ud<\/a><\/span>Node, or Node.js, is a JavaScript runtime built on Chrome's V8 engine, enabling server-side scripting. It allows developers to build scalable network applications using asynchronous, event-driven architecture. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> orchestrates the cluster, managing the state of the system, scheduling applications, and monitoring health. The worker nodes run<\/a><\/span>\"RUN\" refers to a command in various programming languages and operating systems to execute a specified program or script. It initiates processes, providing a controlled environment for task execution. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> the actual containerized applications. Each n\u0153ud<\/a><\/span>Node, or Node.js, is a JavaScript runtime built on Chrome's V8 engine, enabling server-side scripting. It allows developers to build scalable network applications using asynchronous, event-driven architecture. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> in a Kubernetes cluster can run<\/a><\/span>\"RUN\" refers to a command in various programming languages and operating systems to execute a specified program or script. It initiates processes, providing a controlled environment for task execution. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> multiple pods, which are the smallest deployable units in Kubernetes.<\/p>\n

2. Gousses<\/h3>\n

A pod is a group of one or more containers that share the same r\u00e9seau<\/a><\/span>A network, in computing, refers to a collection of interconnected devices that communicate and share resources. It enables data exchange, facilitates collaboration, and enhances operational efficiency. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> namespace et volumes de stockage. Les pods sont \u00e9ph\u00e9m\u00e8res par conception et peuvent \u00eatre cr\u00e9\u00e9s, d\u00e9truits et recr\u00e9\u00e9s par Kubernetes en fonction de l'\u00e9tat souhait\u00e9 d\u00e9fini par l'utilisateur. Le concept de pods permet aux applications \u00e9troitement coupl\u00e9es (comme un serveur web et une base de donn\u00e9es) de r\u00e9sider ensemble, facilitant ainsi la communication et le partage de ressources.<\/p>\n

3. Services<\/h3>\n

Services in Kubernetes provide a stable endpoint for accessing a dynamic set of pods. They abstract the underlying pods and offer functionality for load balancing<\/a><\/span>L'\u00e9quilibrage de charge est une technique essentielle de gestion de r\u00e9seau qui distribue le trafic entrant sur plusieurs serveurs. Cela garantit une utilisation optimale des ressources, minimise le temps de r\u00e9ponse et am\u00e9liore la disponibilit\u00e9 des applications. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span>, service<\/a><\/span>Le service fait r\u00e9f\u00e9rence \u00e0 l'acte de fournir une assistance ou un soutien pour r\u00e9pondre \u00e0 des besoins ou des exigences sp\u00e9cifiques. Dans divers domaines, il englobe le service client, le support technique et les services professionnels, en mettant l'accent sur l'efficacit\u00e9 et la satisfaction de l'utilisateur. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> discovery, and routing. When a pod is created or destroyed, the service<\/a><\/span>Le service fait r\u00e9f\u00e9rence \u00e0 l'acte de fournir une assistance ou un soutien pour r\u00e9pondre \u00e0 des besoins ou des exigences sp\u00e9cifiques. Dans divers domaines, il englobe le service client, le support technique et les services professionnels, en mettant l'accent sur l'efficacit\u00e9 et la satisfaction de l'utilisateur. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> remains unchanged, allowing applications to communicate seamlessly without the need to track individual pod IP addresses.<\/p>\n

4. D\u00e9ploiements<\/h3>\n

A deployment in Kubernetes defines the desired state for a pod, including the number of replicas and the conteneur<\/a><\/span>Containers are lightweight, portable units that encapsulate software and its dependencies, enabling consistent execution across different environments. They leverage OS-level virtualization for efficiency. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> image<\/a><\/span>Une image est une repr\u00e9sentation visuelle d'un objet ou d'une sc\u00e8ne, g\u00e9n\u00e9ralement compos\u00e9e de pixels dans les formats num\u00e9riques. Elle peut transmettre des informations, susciter des \u00e9motions et faciliter la communication \u00e0 travers diff\u00e9rents m\u00e9dias. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> to use. Kubernetes continuously monitors the state of the pods and makes adjustments to match the desired state. If a pod crashes or becomes unhealthy, the deployment controller automatically replaces it, ensuring high availability.<\/p>\n

5. ConfigMaps et Secrets<\/h3>\n

Kubernetes fournit des ConfigMaps et des Secrets pour g\u00e9rer les donn\u00e9es de configuration et les informations sensibles. Les ConfigMaps stockent les donn\u00e9es de configuration non sensibles sous forme de paires cl\u00e9-valeur, tandis que les Secrets sont con\u00e7us pour les donn\u00e9es sensibles comme les mots de passe ou les API<\/a><\/span>Une API, ou Interface de programmation, permet aux applications logicielles de communiquer et d'interagir entre elles. Elle d\u00e9finit des protocoles et des outils pour construire des logiciels et faciliter l'int\u00e9gration. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span> keys. This separation allows for better security and management of application configuration.<\/p>\n

Kubernetes Architecture<\/h2>\n

Kubernetes follows a client-server architecture, where the control plane (master n\u0153ud<\/a><\/span>Node, or Node.js, is a JavaScript runtime built on Chrome's V8 engine, enabling server-side scripting. It allows developers to build scalable network applications using asynchronous, event-driven architecture. More \u00bb<\/a><\/span><\/span><\/span><\/span><\/span>) communicates with the worker nodes (agents). The architecture is modular and can be extended with various components.<\/p>\n

Control Plane Components<\/h3>\n