{"id":1609,"date":"2012-03-13T12:08:58","date_gmt":"2012-03-13T11:08:58","guid":{"rendered":"http:\/\/www.solucominsight.fr\/?p=1609"},"modified":"2019-12-31T12:15:56","modified_gmt":"2019-12-31T11:15:56","slug":"panne-facebook-symptomatique-de-la-resilience-du-cloud-computing","status":"publish","type":"post","link":"https:\/\/www.riskinsight-wavestone.com\/en\/2012\/03\/panne-facebook-symptomatique-de-la-resilience-du-cloud-computing\/","title":{"rendered":"Panne Facebook : symptomatique de la r\u00e9silience du cloud computing ?"},"content":{"rendered":"<p>Apr\u00e8s les 3 jours d\u2019arr\u00eat du service BlackBerry en octobre dernier, la panne majeure du service Microsoft Windows Azure le 29 f\u00e9vrier dernier, voil\u00e0 que l\u2019embl\u00e9matique site du social networking aux 850 millions d\u2019abonn\u00e9s connait lui aussi une interruption ce mardi 7 mars. Qui, parmi les innombrables nouveaux acteurs du <em>cloud<\/em>, nouvel eldorado \u00e9conomique de la sph\u00e8re IT, sera le prochain concern\u00e9\u00a0?<\/p>\n<h2><strong>En mati\u00e8re de disponibilit\u00e9, les promesses du <em>cloud<\/em> n\u2019engagent que ceux qui y croient\u00a0!<\/strong><\/h2>\n<p>L\u2019Hyper Cycle 2011 du Gartner a positionn\u00e9 en ao\u00fbt dernier <a href=\"http:\/\/www.silicon.fr\/gartner-classement-2011-de-maturite-des-technologies-le-cloud-decroche-58084.html\" target=\"_blank\" rel=\"noopener noreferrer\">le cloud dans sa phase de \u00ab\u00a0d\u00e9sillusion\u00a0\u00bb<\/a>. Force est de constater que les incidents \u00e0 r\u00e9p\u00e9tition que rencontrent les grands noms du cloud depuis l\u2019ann\u00e9e pass\u00e9e ne font que confirmer cette \u00e9tat de \u00ab\u00a0disgr\u00e2ce\u00a0\u00bb. \u00a0Petit rappel des deux faits\u00a0marquants de ce d\u00e9but d\u2019ann\u00e9e.<\/p>\n<p>Le 29 f\u00e9vrier \u00e0 1h45 (GMT), la plate-forme de cloud services Windows Azure tombe sur 4 de ses 6 plaques mondiales pendant une dur\u00e9e oscillant entre 12h et 48h. Cette interruption de services a son origine dans un bogue logiciel g\u00e9n\u00e9rant une erreur de calcul de dates sur les ann\u00e9es bissextiles\u00a0; \u00e0 la d\u00e9charge de Microsoft, \u00a0il est vrai qu\u2019Azure ouvert en 2010 n\u2019a pas connu d\u2019autre ann\u00e9e bissextile que 2012. Cette panne a laiss\u00e9 sur le carreau plusieurs sites cl\u00e9s, dont la fameuse place de march\u00e9 du gouvernement britannique, le \u00ab<a href=\"http:\/\/www.govstore.net\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0CloudStore<\/a>\u00a0\u00bb.<\/p>\n<p>Ce 7 mars vers 5h (GMT), le service Facebook tombe en panne plus de 3 heures sur les plaques \u00a0Europe, Afrique et Moyen-Orient. Principale cause avanc\u00e9e, celle de la d\u00e9faillance des serveurs DNS europ\u00e9ens de Facebook entra\u00eenant l\u2019inaccessibilit\u00e9 du site. Point\u00e9s du doigt, les Anonymous ont d\u00e9menti \u00eatre m\u00eal\u00e9s \u00e0 cet incident. En tout \u00e9tat de cause, le communiqu\u00e9 officiel de Facebook ne laisse filtrer aucune explication. Rappelons-nous que Facebook avait d\u00e9j\u00e0 rencontr\u00e9 un probl\u00e8me de configuration BGP en ao\u00fbt 2010.<\/p>\n<p>Ces deux incidents majeurs font \u00e9cho aux non moins m\u00e9diatiques pannes rencontr\u00e9es par les promoteurs du <em>cloud computing<\/em>\u00a0; rem\u00e9morons-nous les incidents de Google (trois en 2009, celle de 05\/2010, puis de 02\/2011 et 09\/2011), d\u2019Amazon et de son service EC2 (12\/2010, 04\/2011, 08\/2011), du pr\u00e9curseur Salesforce.com (02\/2008, 01\/2009, 01\/2010) et du plus r\u00e9cent VMware Cloud Foundry (05\/2011).<\/p>\n<p>S\u2019agissant de \u00ab\u00a0r\u00e9silience\u00a0\u00bb, les atouts du cloud ont maintes fois \u00e9t\u00e9 pr\u00e9sent\u00e9s, on citera en substance\u00a0:<\/p>\n<ul>\n<li>Taux de disponibilit\u00e9 avantageux (Salesforce.com affiche 99,9%)<\/li>\n<li>R\u00e9partition et duplication des ressources sur des lieux g\u00e9ographiques diff\u00e9rents<\/li>\n<li>Accessibilit\u00e9 permanente, en tout point du globe<\/li>\n<li>Standardisation de l\u2019offre technique, facilitant sa reproductibilit\u00e9 sur les datacenters<\/li>\n<\/ul>\n<p>Pour autant, le <em>cloud<\/em> n\u2019en reste pas moins une machinerie complexe par construction\u00a0; du fait de l\u2019empilement des services qui le composent, du volume des ressources qui le constitue et, paradoxalement, de leur r\u00e9partition sur le globe.<\/p>\n<p>Au-del\u00e0 de cette complexit\u00e9 qui impacte les gestes d\u2019exploitation et de maintenance au quotidien s\u2019ajoutent \u00e9galement les risques pos\u00e9s par le mod\u00e8le de standardisation retenu. Les effets d\u2019une erreur de manipulation, d\u2019un bogue ou d\u2019une vuln\u00e9rabilit\u00e9 se font ressentir rapidement sur tout ou partie des infrastructures sous-jacentes.<\/p>\n<p>Difficile dans ces conditions, face \u00e0 des offres \u00ab\u00a0bo\u00eetes noires\u00a0\u00bb peu dissertes sur leur fonctionnement interne, d\u2019accorder un cr\u00e9dit sans limite aux niveaux de disponibilit\u00e9 avanc\u00e9s. Du reste, le cloud public, universel dans son usage et par sa fr\u00e9quentation, ne permet pas de pr\u00e9juger de la mani\u00e8re et avec quelle priorit\u00e9 seront trait\u00e9es, en cas de sinistre, les entreprises (grandes ou petites) en regard des individuels que nous sommes.<\/p>\n<h2><strong>Des axes de progr\u00e8s pour une meilleure r\u00e9silience du <em>cloud<\/em><\/strong><\/h2>\n<p>Ces incidents \u00e0 r\u00e9p\u00e9tition t\u00e9moignent d\u2019une maturit\u00e9 encore insuffisante du march\u00e9 et des fournisseurs, qui fonctionnent encore pour certains \u00ab\u00a0au coup par coup\u00a0\u00bb. Pour autant, le tableau n\u2019est pas si noir, le mod\u00e8le vertueux d\u2019am\u00e9lioration continue se met en place, sous l\u2019impulsion notamment de l\u2019alliance <a href=\"http:\/\/www.cloudsecurityalliance.org\" target=\"_blank\" rel=\"noopener noreferrer\">CSA<\/a> (cloud security alliance)\u00a0 qui promeut de bonnes pratiques en mati\u00e8re de s\u00e9curit\u00e9 et de r\u00e9silience du cloud, des exigences d\u2019acteurs clefs et \/ou de gouvernements (PCI DSS, FISMA, HIPAA, etc.) et, il faut bien le dire, au gr\u00e9 des incidents v\u00e9cus.<\/p>\n<p>D\u2019autant que la probl\u00e9matique de continuit\u00e9 tout comme de s\u00e9curit\u00e9 est au c\u0153ur des pr\u00e9occupations des fournisseurs de service ; en affectant la confiance de leurs clients, pr\u00e9sents et futurs, elle touche directement leur business model. Rappelons-nous enfin que l\u2019une des promesses essentielles du <em>cloud computing<\/em>\u00a0est d\u2019am\u00e9liorer la r\u00e9silience du service rendu, parce qu\u2019il est pr\u00e9cis\u00e9ment \u00ab\u00a0partout dans le nuage\u00a0\u00bb.<\/p>\n<p>A y regarder de plus pr\u00e8s, le nombre d\u2019incidents rencontr\u00e9s par les acteurs du <em>cloud<\/em> est \u00e9quivalent sinon inf\u00e9rieur \u00e0 ce que rencontrent les entreprises. Le principal facteur aggravant tient au fait que la surface d\u2019impact est sans commune mesure avec celles des SI des entreprises\u00a0(ce sont des dizaines de milliers voire de millions d\u2019usagers qui sont touch\u00e9s).<\/p>\n<p>Les fournisseurs de service entrent doucement dans la phase de maturation de leurs offres\u00a0; ils renforcent progressivement leurs dispositifs de continuit\u00e9, prennent davantage en compte le facteur humain (source ind\u00e9fectible d\u2019erreur\u00a0!) et apprennent aussi \u00e0 mieux communiquer aupr\u00e8s de leurs clients.<\/p>\n<p>Mais il ne faut pas croire au <em>cloud<\/em> \u00ab\u00a0infaillible\u00a0\u00bb. Aussi, les entreprises consommatrices de services cloud doivent-elles pr\u00e9voir des processus de continuit\u00e9 de leurs m\u00e9tiers les plus sensibles et de pr\u00e9servation de leurs donn\u00e9es les plus critiques.<\/p>\n<p>C\u2019est enfin le prochain challenge des fournisseurs que de prouver et d\u00e9montrer les performances de leurs services cloud face \u00e0 ceux des SI des grandes organisations\u00a0!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apr\u00e8s les 3 jours d\u2019arr\u00eat du service BlackBerry en octobre dernier, la panne majeure du service Microsoft Windows Azure le 29 f\u00e9vrier dernier, voil\u00e0 que l\u2019embl\u00e9matique site du social networking aux 850 millions d\u2019abonn\u00e9s connait lui aussi une interruption ce&#8230;<\/p>\n","protected":false},"author":24,"featured_media":3381,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"page-templates\/tmpl-one.php","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3223,36],"tags":[80,3119,391],"coauthors":[821],"class_list":["post-1609","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud-next-gen-it-security","category-cybersecurity-digital-trust","tag-cloud","tag-cloud-security","tag-continuite-dactivite"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Panne Facebook : symptomatique de la r\u00e9silience du cloud computing ? 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