{"id":4238,"date":"2013-09-26T17:00:49","date_gmt":"2013-09-26T16:00:49","guid":{"rendered":"http:\/\/www.solucominsight.fr\/?p=4238"},"modified":"2015-01-21T09:53:24","modified_gmt":"2015-01-21T08:53:24","slug":"quelles-vertus-au-cloud-hybride","status":"publish","type":"post","link":"https:\/\/www.riskinsight-wavestone.com\/en\/2013\/09\/quelles-vertus-au-cloud-hybride\/","title":{"rendered":"Quelles vertus au Cloud hybride ?"},"content":{"rendered":"<p><em>S\u2019agissant d\u2019IaaS, les grands comptes (traditionnellement attentifs \u00e0 la s\u00e9curit\u00e9 et b\u00e9n\u00e9ficiant d\u2019une masse critique leur permettant de choisir des solutions d\u00e9di\u00e9es) se sont aujourd\u2019hui majoritairement orient\u00e9s vers les clouds priv\u00e9s. <\/em><\/p>\n<p><em>Le cloud public, moins cher mais non n\u00e9cessairement moins s\u00e9curis\u00e9, commence \u00e0 s\u00e9duire ces m\u00eames comptes et non plus seulement les TPE et PME, notamment pour des environnements non critiques ou demandant une forte agilit\u00e9.<\/em><\/p>\n<p><em>Et si l\u2019\u2019avenir n\u2019\u00e9tait pas le cloud, mais le<strong>s<\/strong> cloud<strong>s <\/strong>?<\/em><\/p>\n<h2><strong>La proposition de valeur du <em>cloud<\/em> hybride<\/strong><\/h2>\n<p>Chaque mod\u00e8le de d\u00e9ploiement (priv\u00e9, privatif, public) a ses avantages (personnalisation et contr\u00f4le des donn\u00e9es dans le <em>cloud<\/em> priv\u00e9, prix et scalabilit\u00e9 dans le <em>cloud<\/em> public) et ses inconv\u00e9nients (co\u00fbts d\u2019investissement pour le priv\u00e9, moindre contr\u00f4le des donn\u00e9es dans le public). Le <em>cloud<\/em> hybride consiste en l\u2019utilisation de plusieurs <em>clouds<\/em> afin d\u2019en maximiser les b\u00e9n\u00e9fices selon les besoins de l\u2019entreprise.<\/p>\n<p>Parmi les grands cas d\u2019usage de l\u2019approche hybride, l\u2019on retrouve\u00a0:<\/p>\n<ul>\n<li>La r\u00e9partition d\u2019applications sur plusieurs <em>clouds<\/em> suivant leurs besoins (criticit\u00e9 des donn\u00e9es, \u00e9lasticit\u00e9 et agilit\u00e9, etc.) permettant de profiter du \u00ab\u00a0meilleurs des deux mondes\u00a0\u00bb. L&#8217;entreprise pourra par exemple utiliser un <em>cloud<\/em> public pour des environnements web faiblement coupl\u00e9s au SI et un <em>cloud <\/em>priv\u00e9 pour des environnements h\u00e9bergeant des donn\u00e9es m\u00e9tiers critiques. Il s\u2019agit du cas d\u2019usage le plus fr\u00e9quemment rencontr\u00e9.<\/li>\n<li>Le \u00ab\u00a0<em>cloud burst<\/em>\u00a0\u00bb\u00a0permettant d\u2019absorber des pics de charge en faisant d\u00e9border son infrastructure priv\u00e9e vers un <em>cloud<\/em> public ou privatif. Cela permet notamment de compenser l\u2019\u00e9lasticit\u00e9 moindre du <em>cloud<\/em> priv\u00e9 pour des besoins ponctuels.<\/li>\n<li>La r\u00e9partition des tiers d\u2019une application\u00a0: les couches applicatives et base de donn\u00e9es h\u00e9berg\u00e9es dans un <em>cloud<\/em> priv\u00e9 tandis que la couche de pr\u00e9sentation sera sur un <em>cloud<\/em> public (elle ne g\u00e8re pas de donn\u00e9es critique et requiert une forte \u00e9lasticit\u00e9)<\/li>\n<li>L\u2019optimisation des co\u00fbts et les performances en utilisant plusieurs fournisseurs de <em>cloud<\/em> public et en choisissant, en temps r\u00e9el, le plus avantageux.<\/li>\n<\/ul>\n<p>Cependant, sans un bon outillage, les co\u00fbts induits par la gestion de plusieurs <em>clouds<\/em> peuvent constituer un r\u00e9el frein \u00e0 l\u2019adoption.<\/p>\n<h2><strong>Comment piloter un <em>cloud<\/em> hybride ?<\/strong><\/h2>\n<p>Le <em>Cloud management platform<\/em> (CMP) fournit \u00e0 la DSI une interface de gestion unifi\u00e9e vers de multiples fournisseurs de <em>cloud<\/em>.<\/p>\n<p><a href=\"http:\/\/www.solucominsight.fr\/2013\/09\/quelles-vertus-au-cloud-hybride\/schema-cmp-2\/\" rel=\"attachment wp-att-4242\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-4242\" title=\"sch\u00e9ma CMP\" src=\"http:\/\/www.solucominsight.fr\/wp-content\/uploads\/2013\/09\/sch\u00e9ma-CMP1.png\" alt=\"\" width=\"662\" height=\"452\" srcset=\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2013\/09\/sch\u00e9ma-CMP1.png 1104w, https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2013\/09\/sch\u00e9ma-CMP1-280x191.png 280w, https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2013\/09\/sch\u00e9ma-CMP1-57x39.png 57w\" sizes=\"auto, (max-width: 662px) 100vw, 662px\" \/><\/a><\/p>\n<p>Si de nombreux\u00a0 outils existent, deux grandes approches se distinguent :<\/p>\n<h4><strong>1 &#8211; L\u2019approche \u00ab\u00a0Open\u00a0\u00bb\u00a0: libert\u00e9 et r\u00e9versibilit\u00e9<\/strong><\/h4>\n<p>Cette approche se base sur l&#8217;utilisation de plate-formes de gestion de <em>cloud <\/em>priv\u00e9 comme le tr\u00e8s en vogue <em><a href=\"http:\/\/www.openstack.org\/software\/\">OpenStack<\/a><\/em> (mais aussi <em><a href=\"http:\/\/cloudstack.apache.org\/\">Cloudstack<\/a><\/em> ou <em><a href=\"http:\/\/www.eucalyptus.com\/eucalyptus-cloud\/iaas\">Eucalyptus<\/a><\/em>) permettant l&#8217;extension de son infrastructure sur un Cloud Public, ou sur des solutions logicielles comme <em><a href=\"http:\/\/www.scalr.com\/product\/\">Scalr<\/a><\/em> ou <a href=\"http:\/\/www.enstratius.com\/\">Dell Multi-Cloud Manager<\/a> (ex-<em>Entratius).<\/em> Une entreprise pourra ainsi b\u00e9n\u00e9ficier d&#8217;une grande libert\u00e9 dans le choix des <em>clouds<\/em> \u00e0 piloter (et de fait d&#8217;une meilleure r\u00e9versibilit\u00e9), tout en limitant ses investissements et en gardant une certaine souplesse dans la personnalisation de l&#8217;outil.<\/p>\n<p>Cependant sa complexit\u00e9 de mise en \u0153uvre peut parfois \u00eatre un frein au d\u00e9ploiement et grever le TCO (<em>total cost of ownership<\/em>) de la solution (co\u00fbts OPEX d&#8217;ing\u00e9nierie notamment). D&#8217;autre part, la s\u00e9curisation de cette solution, partiellement ouverte sur internet (pour piloter un ou plusieurs <em>cloud<\/em>s publics) reste \u00e0 la charge de l&#8217;entreprise, ce qui pourra refroidir les responsables de la s\u00e9curit\u00e9.<\/p>\n<p>La solution de simplicit\u00e9 pourra alors se trouver dans l&#8217;approche &#8220;constructeur&#8221;.<\/p>\n<h4><strong>2 &#8211; L\u2019approche \u00ab\u00a0Constructeur\u00a0\u00bb\u00a0: extension de l\u2019hyperviseur et de son outil de gestion<\/strong><\/h4>\n<p>On a pu voir ces derniers mois de grands constructeurs comme Microsoft et VMware ouvrir leurs Clouds publics et d\u00e9voiler leur strat\u00e9gie : proposer \u00e0 leurs clients utilisant leur hyperviseur (respectivement Hyper-V et vSphere) de basculer de fa\u00e7on transparente sur leur <em>cloud<\/em> public ou celui d\u2019un tiers.<\/p>\n<p>Il s&#8217;agit pour l&#8217;entreprise de s&#8217;appuyer sur son existant, sans d\u00e9ploiement suppl\u00e9mentaire et sans bouleverser son organisation. Elle b\u00e9n\u00e9ficie de nouvelles fonctionnalit\u00e9s tout en pr\u00e9servant une s\u00e9curisation forte.<\/p>\n<p>Cependant le risque de &#8220;Lock-in&#8221; chez un constructeur n&#8217;est pas neutre et la r\u00e9versibilit\u00e9 sera n\u00e9cessairement plus difficile qu&#8217;avec un outil ind\u00e9pendant. De plus les co\u00fbts d&#8217;utilisation du <em>cloud<\/em> public seront souvent plus \u00e9lev\u00e9s et les besoins sp\u00e9cifiques de l\u2019entreprise (la personnalisation de l\u2019outil) plus difficiles \u00e0 faire passer.<\/p>\n<h2><strong>S\u2019outiller pour anticiper les changements futurs<\/strong><\/h2>\n<p>L&#8217;usage du <em>cloud <\/em>par les entreprises, dans une strat\u00e9gie hybride, va se g\u00e9n\u00e9raliser dans les ann\u00e9es \u00e0 venir, et les changements induits sont multiples. Il est donc n\u00e9cessaire de les anticiper et de s&#8217;y pr\u00e9parer. Pour cela, il est important pour l&#8217;entreprise de commencer \u00e0 aligner ses processus et \u00e0 r\u00e9fl\u00e9chir \u00e0 sa strat\u00e9gie d\u2019outillage.<\/p>\n<p>Cependant les outils de pilotage unifi\u00e9s \u00e9tant encore peu matures, seules les entreprises allant tr\u00e8s fortement vers le <em>cloud<\/em> ont int\u00e9r\u00eat \u00e0 s\u2019outiller imm\u00e9diatement (pour \u00e9viter une explosion de leurs co\u00fbts d\u2019op\u00e9rations). Les entreprises moins press\u00e9es, elles, pourront attendre que les outils soient plus m\u00fbrs et se limiter pour l\u2019instant \u00e0 une veille active.<\/p>\n<p>Dans tous les cas r\u00e9fl\u00e9chir \u00e0 sa strat\u00e9gie d\u2019outillage n\u2019est plus une option, il s\u2019agit de pr\u00e9parer l\u2019avenir\u00a0!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>S\u2019agissant d\u2019IaaS, les grands comptes (traditionnellement attentifs \u00e0 la s\u00e9curit\u00e9 et b\u00e9n\u00e9ficiant d\u2019une masse critique leur permettant de choisir des solutions d\u00e9di\u00e9es) se sont aujourd\u2019hui majoritairement orient\u00e9s vers les clouds priv\u00e9s. Le cloud public, moins cher mais non n\u00e9cessairement moins&#8230;<\/p>\n","protected":false},"author":300,"featured_media":4162,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"page-templates\/tmpl-one.php","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[35],"tags":[44,1321,89,1320,1211],"coauthors":[2545],"class_list":["post-4238","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-strategie-projets-it","tag-cloud-computing","tag-donnees-critiques","tag-iaas","tag-optimisation-des-couts","tag-reversibilite"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quelles vertus au Cloud hybride ? - RiskInsight<\/title>\n<meta name=\"description\" content=\"S\u2019agissant d\u2019IaaS, les grands comptes (traditionnellement attentifs \u00e0 la s\u00e9curit\u00e9 et b\u00e9n\u00e9ficiant d\u2019une masse critique leur permettant de choisir des solutions d\u00e9di\u00e9es) se sont aujourd\u2019hui majoritairement orient\u00e9s vers les clouds priv\u00e9s. Le cloud public, moins cher mais non n\u00e9cessairement moins s\u00e9curis\u00e9 pour autant, commence n\u00e9anmoins \u00e0 s\u00e9duire ces m\u00eames comptes et non plus seulement les TPE et PME, notamment pour certains besoins tels que les environnements non critiques ou demandant une forte agilit\u00e9. 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Et si l\u2019\u2019avenir n\u2019\u00e9tait pas le Cloud, mais les clouds ?","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.riskinsight-wavestone.com\/en\/2013\/09\/quelles-vertus-au-cloud-hybride\/","og_locale":"en_US","og_type":"article","og_title":"Quelles vertus au Cloud hybride ? - RiskInsight","og_description":"S\u2019agissant d\u2019IaaS, les grands comptes (traditionnellement attentifs \u00e0 la s\u00e9curit\u00e9 et b\u00e9n\u00e9ficiant d\u2019une masse critique leur permettant de choisir des solutions d\u00e9di\u00e9es) se sont aujourd\u2019hui majoritairement orient\u00e9s vers les clouds priv\u00e9s. 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