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## Simplifiez vos déploiement avec la conteneurisation
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Nathan Tien You
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---
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## Sommaire
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- Introduction à la conteneurisation
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- Docker
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- Principes clés
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- Conteneurs
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- Images
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- Orchestration
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- Exemples d'applications
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---
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## Nathan Tien You
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<!-- .slide: data-visibility="hidden"-->
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- Ingénieur spécialité informatique
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- Développeur fullstack
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- Home Server :
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- Proxmox
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- Docker
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- Gitea actions
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- Amateur de jeux de deckbuilding
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---
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## Problématiques liées à la virtualisation
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- Gourmand (Mémoire, processeur, disque dur)
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- Installation lourde
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- Mises à jour et maintenance
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- Système d'exploitation
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- Outils de supervision
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- Dépendances / prérequis
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---
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## Infrastructure as code
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- Automatisation
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- Fiabilité
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- Efficacité
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- Contrôle des versions
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- Autodocumenté
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- Immutabilité
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---
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## Virtualisation du service
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<!-- <sup>source : [Gitlab](https://gitlab.com)</sup> -->
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---
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## Différents types de conteneurisation
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- Conteneurs Processus
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- Docker
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- Podman
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- Conteneurs Machine
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- LXC
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- LXD
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---
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## Conteneurs
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Contexte d'éxecution isolé : chroot
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---
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## Base du conteneur : image
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---
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## Registres d'images
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<!-- .slide: data-visibility="hidden"-->
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---
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## Lancement d'un conteneur
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```bash
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docker run hello-world
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```
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----
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<!-- .slide: data-visibility="hidden" data-background-video="./assets/run.mp4" data-background-size="contain" -->
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---
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## Bonnes pratiques Docker
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- Conteneurs éphémères
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- Processus stateless
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- Architecture Shared-nothing
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- Images minimales
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- Installer uniquement le nécessaire
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- Compiler le code dans les images : pas de compilation en production
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---
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## Construction d'une image
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<!-- .slide: data-visibility="hidden"-->
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```Docker dockercompose
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FROM node:lts-alpine3.20
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WORKDIR /app
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COPY package.json ./
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COPY package-lock.json ./
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COPY index.js ./
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RUN npm ci
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CMD ["node", "index.js"]
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```
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```bash
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docker buildx build . -t demo:latest
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```
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----
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<!-- .slide: data-background-video="./assets/run.mp4" data-background-size="contain" data-visibility="hidden" -->
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---
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## Orchestration
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<!-- .slide: data-auto-animate -->
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Conteneur Docker = processus unitaire
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**But : agencer plusieurs conteneurs pour faire une application**
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---
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## Orchestration
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<!-- .slide: data-auto-animate -->
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- Automatisation du déploiement
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- Horizontal Scaling
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- Nombreuses platformes
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- Kubernetes
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- Docker Compose
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- OpenShift
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---
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<h2>Exemple d'usage</h2>
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<object data-id="Compose.svg" data="./assets/Compose.drawio.svg" type="image/svg+xml"></object>
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----
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```yaml [|1-4,11-13,21-23|5-6,14-15,36-37|8-9,18-19,28-30,32-34|7,16-17,24-25,26-27] dockercompose
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services:
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database:
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image: redis:alpine3.20
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volumes:
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- database-data:/data
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command: "redis-server --save 60 1"
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networks:
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- back
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frontend:
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image: docker-demo/front
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build: ./front
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volumes:
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- ./test.txt:/usr/local/apache2/htdocs/test.txt
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ports:
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- "80:80"
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networks:
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- front
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backend:
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image: docker-demo/backend
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build: ./back
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environment:
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- REDIS_URL=redis://database
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depends_on:
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- database
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networks:
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- back
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- front
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networks:
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front:
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back:
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volumes:
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database-data:
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```
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---
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## Orchestration : Kubernetes
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- Clusters
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- Stockage distribué
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- Haute Disponibilité
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- Redondance
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- Stratégie de déploiement
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---
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## Où utiliser la conteneurisation ?
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- Services internes ou publics
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- DevOps (Déploiement et intégration continue)
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- Technologies Cloud (AWS, Azure...) ou on-prem
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- Complémentaire aux machines virtuelles
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