{"id":922,"date":"2025-10-08T11:47:58","date_gmt":"2025-10-08T09:47:58","guid":{"rendered":"https:\/\/webcatalyste.fr\/?page_id=922"},"modified":"2025-10-09T11:29:00","modified_gmt":"2025-10-09T09:29:00","slug":"experience_cloud","status":"publish","type":"page","link":"https:\/\/portfolio.webcatalyste.fr\/?page_id=922","title":{"rendered":"Mon exp\u00e9rience du cloud"},"content":{"rendered":"\t\t
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\u2601\ufe0f Mon exp\u00e9rience du Cloud : ce que j\u2019ai vraiment appris en le pratiquant<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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TL;DR<\/b><\/span> \u2014 J\u2019ai d\u00e9marr\u00e9 par curio\u00adsit\u00e9 (Azure \u00e9tudiant, OVHcloud pour l\u2019h\u00e9bergement), puis je me suis r\u00e9ellement plong\u00e9 dans AWS<\/b><\/span>. En labs, S3<\/b><\/span> est devenu mon pivot. J\u2019ai fait des erreurs (SG trop ouverts, co\u00fbts mal suivis) et j\u2019ai corrig\u00e9 avec des checklists<\/b><\/span> simples, des tags<\/b><\/span> et des budgets. Les labs m\u2019ont tout appris.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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D\u2019o\u00f9 je pars<\/b><\/span><\/h3>
  • \u00c9tudes + auto-formation en parall\u00e8le.<\/li>
  • 1er SIEM ELK<\/b><\/span> fait en cloud<\/strong>.<\/li><\/ul>

    \u00a0Mes premiers usages cloud<\/b><\/span><\/h3>

      • Azure (compte \u00e9tudiant)<\/b><\/span> : d\u00e9couverte, premiers services, prise en main.<\/p><\/li>

      • OVHcloud<\/b><\/span> : h\u00e9bergement & support concrets (WordPress\/VM).<\/p><\/li>

      • AWS (labs)<\/b><\/span> : EC2, VPC, IAM, S3<\/b><\/span>\u2026 j\u2019ai \u201cmis les mains dedans\u201d pour de vrai.<\/p><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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        S3 : mon service pivot<\/b><\/span><\/h3>

        • Stockage d\u2019objets<\/b><\/span> pour fichiers, backups, artefacts.<\/p><\/li>

        • Sites statiques<\/b><\/span> en lab, r\u00e8gles d\u2019acc\u00e8s & politiques bucket.<\/p><\/li>

        • Bon r\u00e9flexe<\/b><\/span> appris : tags<\/b><\/span>, classes de stockage & lifecycle<\/b><\/span> pour ma\u00eetriser les co\u00fbts.<\/p>

          \u00a0<\/p>

          \u00a0<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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          Pourquoi AWS m\u2019a accroch\u00e9<\/b><\/span><\/h3>

          • Simplicit\u00e9<\/b><\/span> : cr\u00e9er, tester, casser, refaire\u2026 vite.<\/p><\/li>

          • Richesse<\/b><\/span> : un catalogue qui couvre presque tout.<\/p><\/li>

          • S\u00e9curit\u00e9<\/b><\/span> : IAM clair, SG\/NACL, KMS\u2026 si tu configures bien.<\/p><\/li>

          • \u00c9cosyst\u00e8me<\/b><\/span> : docs, forums, tutoriels, labs \u00e0 gogo.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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            Mes erreurs (et ce que j\u2019en ai tir\u00e9)<\/b><\/span><\/h3>

            • SG \u201ctrop ouverts\u201d \u201cjuste pour tester\u201d \u2192 checklist durcissement<\/b><\/span> avant mise en ligne.<\/p><\/li>

            • IAM<\/b><\/span> trop large \u2192 moindre privil\u00e8ge<\/b><\/span>, r\u00f4les d\u00e9di\u00e9s, pas de cl\u00e9s qui tra\u00eenent.<\/p><\/li>

            • Co\u00fbts<\/b><\/span> (egress, logs sans lifecycle) \u2192 budgets\/alertes<\/b><\/span>, tags<\/b><\/span> syst\u00e9matiques.<\/p><\/li>

            • Backups non test\u00e9s<\/b><\/span> \u2192 un mini-restore<\/b><\/span> planifi\u00e9 chaque mois.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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              Ce que j\u2019applique maintenant<\/b><\/span><\/h3>

              • Priv\u00e9 par d\u00e9faut<\/b><\/span> : subnets priv\u00e9s, IP publiques seulement si n\u00e9cessaire.<\/p><\/li>

              • IAM propre<\/b><\/span> : r\u00f4les par usage, MFA comptes sensibles.<\/p><\/li>

              • Observabilit\u00e9<\/b><\/span> : logs centralis\u00e9s + 2\u20133 dashboards utiles<\/b><\/span> (pas \u201cjolis\u201d, utiles<\/b><\/span>).<\/p><\/li>

              • Backups & PRA<\/b><\/span> : snapshots + exports, doc courte \u201ccomment restaurer\u201d.<\/p><\/li>

              • FinOps <\/b><\/span>: rightsizing, extinction hors horaires, lifecycle S3.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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                Conseils \u00e0 quelqu\u2019un qui d\u00e9marre<\/b><\/span><\/h3>

                • Commence par S3 + VPC\/IAM<\/b><\/span> avant de vouloir tout voir.<\/p><\/li>

                • Fais des labs<\/b><\/span> : c\u2019est en pratiquant que l\u2019abstrait devient clair.<\/p><\/li>

                • Garde des checklists<\/b><\/span> (durcir SSH, ouvrir un SG, restaurer une sauvegarde).<\/p><\/li>

                • \u00a0Tag<\/b><\/span> tout et mets un budget<\/b><\/span> d\u00e8s le d\u00e9part pour pas de surprise.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

                  \u2601\ufe0f Mon exp\u00e9rience du Cloud : ce que j\u2019ai vraiment appris en le pratiquant TL;DR \u2014 J\u2019ai d\u00e9marr\u00e9 par curio\u00adsit\u00e9 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-922","page","type-page","status-publish","hentry"],"yoast_head":"\nMon exp\u00e9rience du cloud - 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