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DevOps : mission [im]possible ?

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Dans un contexte d’entreprise souvent perçu comme rigide, envisager des changements techniques et organisationnels peut sembler impossible. DevOps est un bon contre-exemple car il existe des façons progressives d’introduire une telle méthodologie à plusieurs niveaux de l’entreprise. Cette session revient sur les principes de bases de DevOps (infrastructure-as-code, continuous delivery, culture de collaboration) et leur application pas-à-pas dans différents contextes.

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DevOps : mission [im]possible ?

  1. 1. 11 Romain Felden & Farhdine Boutzakhti @herrFelden & @farhdine DevOps : Mission [im]possible ?
  2. 2. 22 Notre mission : Démystifier l’approche et la rendre accessible !
  3. 3. 33 Pourquoi DevOps ?
  4. 4. 44 Presque 50% temps total des activités des équipes d’exploitation est consacré au déploiement :   Gestion du déploiement   Gestion des incidents (liés en grande partie au déploiement) ACTIVITÉS DES ÉQUIPES OPS Source : Etude de Deepak Patil (Microsoft Global Foundation Services) de 2006, via une présentation de James Hamilton (Amazon Web Services) http://mvdirona.com/jrh/TalksAndPapers/JamesHamilton_POA20090226.pdf
  5. 5. 55 A LA MAIN ?
  6. 6. 66 Jusqu’à quel point l’infrastructure est automatisée ? AUTOMATISATION DE L’INFRASTRUCTURE Chiffres issus d’un sondage de 690 « Ops » par RebelLabs / ZeroTurnAround (société éditrice de jRebel et LiveRebel) fait en 2013 All rights reserved. 2013 © ZeroTurnaround OÜ infrastructure as code, and those are the early adopters that manage their for this survey. This isn’t anyth code is not som infrastructure. HOw mucH Of yOur InfrasTrucTure DO yOu cOnfIgure wITH cODe? Less THan 10% 61% 10%-25% 5% 51%-75% 8% 76%-90% 6% mOre THan 90% 10% 26%-50% 10% puppeT cHef cfengIne ansIbLe fabrIc basH
  7. 7. 77 ETENDRE L’AGILITÉ À LA PRODUCTION DEVOPS Code Build Test Deploy Operate Monitor Dev Ops Développement Agile Déploiement / production Agile
  8. 8. 88 3. Culture de la Collaboration Dev Ops 2. Continuous Delivery 1. Infrastructure-as-code AGENDA
  9. 9. 99 Infrastructure- as-code Continuous Delivery Infrastructure- as-code Culture de la Collaboration
  10. 10. 1010 Infrastructure = Code
  11. 11. 1111 Source : http://code.google.com/p/devops-toolchain/wiki/ToolChainsAndUseCases PROVISIONING ET DÉPLOIEMENTS AUTOMATISÉS   Déploiement applicatif   Déploie, configure et connecte les ressources   Configuration système   Configure les ressources de façon homogène   Infrastructure agile   Virtualisation   Environnements complets en self-service
  12. 12. 1212 L’art de builder et de versionner son SI ! Que contient un SI industrialisé ? Des outils de gestion des vms Des images d'OS Des packages OS Des configurations système Des middlewares Des scripts d’installation/mise à jour de middlewares Des configurations middleware Des applications Des scripts de déploiement des applications P’TIT REX
  13. 13. 1313 La stack technique : P’TIT REX OS Middleware Machine Physique Configuration applicative technique Chef Manuel PartieapplicativePartietechnique Configuration Middleware Configuration Système Machine Virtuelle Application PXE ou Clone de VM Capistrano OpenStack
  14. 14. 1414 P’TIT REX Une version du SI :
  15. 15. 1515 Jenkins EXEMPLE D’AUTOMATISATION DU PROVISIONNING EXEMPLE AVEC CAPISTRANO ET CHEF Git Nexus Capistrano Node Chef Hyperviseur API hyperviseur Node Chef Node Chef Dép. app. 2 1 1 3 •  Capistrano demande VM à l’hyperviseur •  Installation OS par PXE ou clone 2 •  Création & mise à disposition VMs •  SSH ouvert, IP temporaire 3 •  Scripts de démarrage (maison, cloud-init…) •  Personnalisation VM, IP, Reseau etc •  Installation Chef 4 4 4 •  Capistrano lance Chef sur Node •  Chef récupère les cookbooks via Git •  Installation packages et configurations 5 5 5 •  Capistrano lance déploiement •  Exécute sur machine téléchargement livrable •  Déploie livrable •  Administrateur lance job0
  16. 16. 1616 Continuous Delivery Continuous Delivery Infrastructure- as-code Culture de la Collaboration
  17. 17. 1717 APPRENDRE VITE DU TERRAIN
  18. 18. 1818 Change Temps Beaucoup de code = Risques importants
  19. 19. 1919 “IF IT HURTS, DO IT MORE OFTEN !” Change Temps Petit changement = Risques maîtrisés
  20. 20. 2020 CONSTRUCTION ET LIVRAISON CONTINUE John  Allspaw,  Etsy   h0p://www.slideshare.net/jallspaw/ops-­‐metametrics-­‐the-­‐currency-­‐you-­‐pay-­‐for-­‐change  
  21. 21. 2121 Réduire le TTR
  22. 22. 2222 Réduire le TTM
  23. 23. 2323 CONTINUOUS… Déployé sur un environnement d’intégration Livré à l’équipe suivante (QA, MEP …) Déployé en production CONTINUOUS INTEGRATION CONTINUOUS DELIVERY CONTINUOUS DEPLOYMENT
  24. 24. 2424 INTÉGRATION CONTINUE
  25. 25. 2525 SÉPAREZ LE BLANC DES JAUNES !
  26. 26. 2626 Facebook : > 2 déploiements par jour Flickr : > 10 déploiements par jour Etsy : > 25 déploiements par jour Amazon : 1 déploiement toutes les 10 secondes sur 10000 machines CHEZ LES GÉANTS DU WEB
  27. 27. 2727 ZERO DOWNTIME DEPLOYMENT Le  Zero-­‐downAme  Deployment   (ZDD)  permet  de  déployer  une   nouvelle  version  d’un  système   sans  interrompre  le  bon   foncAonnement  du  service.  
  28. 28. 2828 Blue/Green Deployment   Pattern standard de ZDD   Une chaîne complète de l’infrastructure est dédiée à la version N+1 Pattern associé : Canary Release   Permet de confronter la version N+1 à une population restreinte d’utilisateurs   Les mécanismes sont identiques au Blue/Green Deployment PATTERNS DE DÉPLOIEMENT Version  N  du  système   Version  N+1  du  système   Load  Balancer   Serveurs   Web   Serveurs   Applica>on   Serveurs   Données   Load  Balancer   N+1 N
  29. 29. 2929 FEATURE FLIPPING http://code.flickr.net/2009/12/02/flipping-out/ if ($cfg.enable_unicorn_polo) { // do something new and amazing here. } else { // do the current boring stuff. }
  30. 30. 3030 Contexte Quotidien national Développement interne agile (Scrum) Objectif   Minimiser l’impact des mises en production sur l’exploitation Améliorer le TTM des nouvelles fonctionnalités Stratégie Livrer souvent Mesurer Solutions Chaîne de livraison continue   Monitoring / feedback loop Le nombre de mises en production passe à environ 10 par jour P’TIT REX
  31. 31. 3131 Culture de la Collaboration Continuous Delivery Infrastructure- as-code Culture de la Collaboration
  32. 32. 3232 Culture  du  Produit  (logiciel)   Culture  du  Service     (archivage,  supervision,  etc.)   Cherche  à  délivrer   Cherche  à  fiabiliser   LE MUR DE LA CONFUSION Dev Ops GaranAr  le  Run  des  applicaAons   (stabilité)   Livrer  de  nouvelles   fonc>onnalités  (de  qualité)   Objec>fs  locaux   Objec>fs  locaux  
  33. 33. 3333
  34. 34. 3434 ALLEZ PRENDRE UN CAFÉ !
  35. 35. 3535 AIDE TON PROCHAIN !
  36. 36. 3636 MODÈLE 1 : UNE ORGANISATION ORIENTÉE PROJET…
  37. 37. 3737 MODÈLE 1 : LA PATATE CHAUDE
  38. 38. 3838 MODÈLE 2 : UNE ORGANISATION HYBRIDE… Agile Agile Agile Exploitation + Infrastructure DEV + TMA
  39. 39. 3939 YOU BUILD IT, YOU RUN IT! WERNER VOGELS CTO @AMAZON
  40. 40. 4040 MODÈLE 3 : UNE ORGANISATION ORIENTÉE PRODUIT !
  41. 41. 4141 PRÊTE TES JOUETS !
  42. 42. 4242 #1. Culture de la collaboration INTÉRESSER LES « DEV » AUX PROBLÈMES DES « OPS »… CA VEUT DIRE ÇA!
  43. 43. 4343 CULTURE DE LA MESURE
  44. 44. 4444 SUPERVISION Transactions Métier € Mbps Charge machine Clients déclarés Clients connectés
  45. 45. 4545 Faire participer les Ops aux rituels Partager avec les Ops dans un objectif d’amélioration continue Des Devs qui participent aux mises en production Post Mortem Des Devs qui s’approprient les mesures / métriques P’TIT REX
  46. 46. 4646
  47. 47. 4747 Take Away Continuous Delivery Infrastructure- as-code Infrastructure- as-code
  48. 48. 4848 POURQUOI DEVOPS ? Fiabiliser les déploiements & Réduire le TTM/TTR
  49. 49. 4949 UNE DÉMARCHE PROGRESSIVE
  50. 50. 5050 Romain Felden Farhdine Boutzakhti @farhdine@herrFelden meetup.com/devopsch
  51. 51. 5151 Merci

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