{"id":282,"date":"2020-08-26T13:59:36","date_gmt":"2020-08-26T13:59:36","guid":{"rendered":"https:\/\/sogipe.fr\/blog\/?p=282"},"modified":"2020-08-27T12:51:11","modified_gmt":"2020-08-27T12:51:11","slug":"nextcloud","status":"publish","type":"post","link":"https:\/\/sogipe.fr\/blog\/2020\/08\/26\/nextcloud\/","title":{"rendered":"NextCloud"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Aujourd\u2019hui, je vous propose de faire le point sur l\u2019\u00e9tat de ce que les non-informaticiens appellent Le Cloud. Ce terme d\u00e9finit une plateforme permettant d\u2019h\u00e9berger et de synchroniser ses donn\u00e9es. Apr\u00e8s un rappel du contexte, je vais vous alerter sur les dangers des plateformes mainstream puis je vais conclure sur une solution open source (sources libres) que j\u2019utilise et promeus.<\/p>\n\n\n\n<!--more-->\n\n\n\n<h1 class=\"wp-block-heading\">Notions de Cloud<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Le cloud est un anglicisme, utilis\u00e9 pour parler de l\u2019informatique en nuage (Cloud Computing), Cloud signifiant litt\u00e9ralement nuage dans la langue de Shakespear.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">D\u00e9finitions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Internet<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pour commencer, il faut savoir que ce qu\u2019on appelle vulgairement \u00ab&nbsp;internet&nbsp;\u00bb, c&rsquo;est un r\u00e9seau permettant de connecter des ordinateurs entre eux. Facebook, Google et compagnie, ce N\u2019EST PAS internet&nbsp;!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les anciens se souviendront du terme \u00ab&nbsp;surfer sur internet&nbsp;\u00bb, qui s\u2019est transformer en \u00ab&nbsp;aller sur internet&nbsp;\u00bb.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Serveur<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Un serveur est consid\u00e9r\u00e9, m\u00eame par la majorit\u00e9 des informaticiens, comme un ordinateur sur lequel est install\u00e9 Windows Server. C\u2019est FAUX&nbsp;! Enfin pas tout \u00e0 fait vrai&nbsp;: Un serveur est une entit\u00e9 qui rend service \u00e0 un ou plusieurs clients.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ainsi chaque ordinateur est \u00e0 la fois serveur et client, votre PC fournit un service aux autres lorsque vous y avez activ\u00e9 le \u00ab&nbsp;partage de fichier&nbsp;\u00bb, et client de l\u2019ordinateur de du site que vous consultez.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Internet, c\u2019est en r\u00e9alit\u00e9, un ensemble d\u2019ordinateurs, r\u00e9partis sur toute la plan\u00e8te (parfois dans des centres de donn\u00e9es), sur lequel est install\u00e9 un logiciel serveur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>La virtualisation<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019informatique en nuage est arriv\u00e9e avec la g\u00e9n\u00e9ralisation des centres de donn\u00e9es gr\u00e2ce \u00e0 la virtualisation. La virtualisation, c\u2019est comme d\u00e9mat\u00e9rialiser un document, mais l\u00e0 on scanne un ordinateur physique ce qui donne un fichier que l\u2019on peut ainsi d\u00e9placer d\u2019ordinateur \u00e0 ordinateur comme la fiche de paye que vous avez scann\u00e9\u2026<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Le Cloud Computing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Comme ces ordinateurs d\u00e9mat\u00e9rialis\u00e9s peuvent en r\u00e9alit\u00e9 se trouver sur n\u2019importe quel ordinateur physique se trouvant dans un centre de donn\u00e9es, et qu\u2019il peut m\u00eame \u00eatre dans l\u2019une un jour et dans une autre le lendemain, sa position est inconnue, nous pouvons dire qu\u2019il se trouve dans un des ordinateurs de ce centre de donn\u00e9es mais c\u2019est a peu pr\u00e8s tout.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019analogie avec un nuage est celle que le nuage est le centre de donn\u00e9es, mais qu\u2019on ne peut voir plus pr\u00e9cis\u00e9ment au risque de ne voir que des gouttelettes (ordinateurs physique), qui sont identiques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Avantages<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les avantages sont&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Moins de g\u00e2chis\u00a0: un ordinateur physique, peut \u00eatre utilis\u00e9 \u00e0 pleine puissance alors qu\u2019avant, ce que le serveur n\u2019utilisait pas consommait de l\u2019\u00e9lectricit\u00e9 pour rien.<\/li><li>Centralisation\u00a0: 100 petits sites web ne n\u00e9cessitent plus qu\u2019un ordinateur physique.<\/li><li>R\u00e9duction des co\u00fbts\u00a0: On ach\u00e8te moins d\u2019ordinateurs pour rendre le service il co\u00fbte moins cher.<\/li><li>Sauvegarde\u00a0: plus besoin de configurer la sauvegarde de chaque ordinateur virtuel, seuls les physiques sont sauvegard\u00e9s, donc moins de travail, moins de co\u00fbts.<\/li><li>&#8230;<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Inconv\u00e9nients<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cependant, cela am\u00e8ne d\u2019autres risques\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>S\u00e9curit\u00e9\u00a0: moins compartiment\u00e9s, les ordinateurs virtuels sont sujet \u00e0 fuites de donn\u00e9es.<\/li><li>S\u00e9curit\u00e9 des donn\u00e9es\u00a0: tout au m\u00eame endroit si la machine casse ou prend feu, tout ce qui n\u2019est pas sauvegard\u00e9 est perdu.<\/li><li>&#8230;<\/li><\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">L\u2019offre GAFAM<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">L\u2019Acronyme<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">GAFAM, pour Google, Amazon, Facebook, Apple, Microsoft, est un acronyme repr\u00e9sentant ce que le commun des mortels consid\u00e8re comme internet. Ils regroupent la majeure partie des services utilis\u00e9s, vous-m\u00eame, vous en utilisez au moins un.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les dangers<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ils sont la b\u00eate noire des libristes, ils espionnent, verrouillent, abusent de leurs clients\/fournisseurs\/utilisateurs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Utilisateur, c\u2019est ce que vous pensez \u00eatre, en v\u00e9rit\u00e9, vous n\u2019\u00eates selon leur business model pas un simple utilisateur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Client, c\u2019est ce que vous devriez \u00eatre. Vous devriez payer, m\u00eame une somme maudique pour contribuer \u00e0 l\u2019entretien de l\u2019infrastructure supportant les services qu\u2019ils vous fournissent.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fournisseurs, c\u2019est ce que vous \u00eates, d\u00e9sol\u00e9 de vous l\u2019apprendre, mais vous fournissez des informations sur vos habitudes \u00e0 google qui les traite et les revend aux publicitaires, aux gouvernements, \u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les dangers d\u00e9coulent de cela, entre espionnage des masses, perte de vie priv\u00e9e, harc\u00e8lement cibl\u00e9 des marques, et votre femme qui en surfant se voit propos\u00e9 ce cadeau que vous allez lui faire pour son anniversaire\u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En parlant de danger, n\u2019oubliez pas que le cloud n\u2019existe pas, c\u2019est seulement l\u2019ordinateur de quelqu\u2019un d\u2019autre.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment ils vivent ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Leur \u00ab\u00a0business model\u00a0\u00bb, ce qui leur permet de gagner de l\u2019argent, c\u2019est le recel d\u2019informations personnelles\u00a0: vos habitudes, vos propos, les propos de vos correspondants, \u2026 Ils revendent \u00e0 prix d\u2019or ces donn\u00e9es. La part de l\u2019entretien de l\u2019infrastructure est en r\u00e9alit\u00e9 minime, m\u00eame les co\u00fbts de d\u00e9veloppements qui sont de plus en plus r\u00e9duits car bas\u00e9s sur de l\u2019open source\u00a0: Microsoft pourrait fournir un Windows bas\u00e9 sur le noyau Linux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En fait s&rsquo;ils vous payaient m\u00eame 50\u00a0% des b\u00e9n\u00e9fices d\u00e9gag\u00e9s par la vente de vos donn\u00e9es, vous gagneriez de l\u2019argent&#8230;<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"134\" height=\"95\" src=\"https:\/\/sogipe.fr\/blog\/wp-content\/uploads\/2020\/08\/Nextcloud_Logo.svg_.png\" alt=\"\" class=\"wp-image-294\"\/><\/figure><\/div>\n\n\n\n<h1 class=\"wp-block-heading\">L\u2019opportunit\u00e9 NextCloud<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Ce que c\u2019est<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nexcloud est un logiciel bas\u00e9 sur une plateforme Web, \u00e0 installer sur son ordinateur, afin d\u2019h\u00e9berger ses donn\u00e9es chez soi ou chez quelqu\u2019un de confiance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ce que ce n\u2019est pas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ce n\u2019est pas compliqu\u00e9 \u00e0 mettre en place. C\u2019est simple, il faut juste savoir le faire, mais au besoin, je peux vous guider, ou le faire pour vous.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment je fais&nbsp;?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dabord, il faut un ordinateur, sur lequel est install\u00e9 un serveur Web et de base de donn\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ensuite, il faut installer le logiciel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour terminer, le configurer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le plus simple est d\u2019installer Yunohost, un syst\u00e8me d\u2019exploitation bas\u00e9 sur Debian GNU\/Linux, qui une fois mis en place permettra d\u2019installer et configurer Nextcloud en quelques clics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Comme toujours, je suis disponible pour vous guider ou vous y aider. Reprenez le contr\u00f4le de votre informatique, comprenez ce qu\u2019il fait, et comment il le fait.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aujourd\u2019hui, je vous propose de faire le point sur l\u2019\u00e9tat de ce que les non-informaticiens appellent Le Cloud. Ce terme d\u00e9finit une plateforme permettant d\u2019h\u00e9berger et de synchroniser ses donn\u00e9es. Apr\u00e8s un rappel du contexte, je vais vous alerter sur les dangers des plateformes mainstream puis je vais conclure sur une solution open source (sources [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":293,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,19],"tags":[33,24,22,25],"class_list":["post-282","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gnu-linux","category-libre","tag-cloud","tag-donnees-personnelles","tag-gafam","tag-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>NextCloud - Sogipe<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sogipe.fr\/blog\/2020\/08\/26\/nextcloud\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NextCloud - Sogipe\" \/>\n<meta property=\"og:description\" content=\"Aujourd\u2019hui, je vous propose de faire le point sur l\u2019\u00e9tat de ce que les non-informaticiens appellent Le Cloud. 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