{"id":28665,"date":"2016-11-29T23:17:58","date_gmt":"2016-11-29T22:17:58","guid":{"rendered":"https:\/\/www.artera.net\/it\/blog\/?p=28665"},"modified":"2023-02-24T09:36:00","modified_gmt":"2023-02-24T09:36:00","slug":"container","status":"publish","type":"post","link":"https:\/\/www.artera.net\/it\/hosting\/container\/","title":{"rendered":"Container vs macchine virtuali, facciamo chiarezza"},"content":{"rendered":"<p>Cosa sono i <strong>container<\/strong> e in cosa sono diversi dalle macchine virtuali? Quale sistema \u00e8 meglio utilizzare? Vediamo pi\u00f9 nel dettaglio in cosa consiste questa tecnologia ancora poco utilizzata.<\/p>\n<p>Il container pu\u00f2 essere definito come una sorta di <strong>server virtualizzato a livello di sistema operativo<\/strong> a differenza delle macchine virtuali che sono istanze dell&#8217;intero server fisico (cio\u00e8 processore, disco, connessioni, eccetera).<\/p>\n<p>Ci sono molti vantaggi nell&#8217;utilizzo dei container. Ad esempio Google ha scelto di sviluppare cgroups per consentire al proprio team di sviluppo di rilasciare software in modo molto pi\u00f9 <strong>rapido, economico e scalabile<\/strong>.<\/p>\n<p>Rispetto ad una macchina virtuale un container permette un <strong>deployment semplificato<\/strong> perch\u00e9 impacchetta un applicativo all&#8217;interno di un singolo componente facilmente configurabile da linea di comando. Inoltre i container consentono un controllo granulare sull&#8217;eseguibilit\u00e0 delle applicazioni.<\/p>\n<p>I container richiedono meno <strong>risorse CPU<\/strong>, dato che non devono inglobare tutte le risorse che invece devono essere considerate in un server. La rapidit\u00e0 di attivazione garantisce la possibilit\u00e0 di gestione di situazioni in cui il <strong>carico computazionale<\/strong> varia in maniera importante nel tempo.<\/p>\n<p>Questo si applica certamente nella gestione di siti web e portali ecommerce in cui il traffico pu\u00f2 presentare picchi enormi ed inaspettati.<\/p>\n<p>Per gli sviluppatori poi i container rappresentano una grande risorsa perch\u00e9 permettono di creare diversi <strong>ambienti di deploy<\/strong> anche sul proprio laptop in modo molto pi\u00f9 rapido rispetto all&#8217;utilizzo delle macchine virtuali. Inoltre i cicli di rilascio sono semplificati grazie al ridotto tempo di setup dell&#8217;ambiente.<\/p>\n<p>Grazie ai container infine \u00e8 possibile, per gli sviluppatori, creare ambienti dedicati invece di dover configurare sul proprio computer tutti i servizi necessari allo sviluppo ed al testing (MySQL, MongoDB, node, js, eccetera).<\/p>\n<p>Ovviamente ci sono anche degli svantaggi nell&#8217;utilizzo dei container. Il pi\u00f9 importante di tutti \u00e8 senza dubbio la minore sicurezza derivante dalla <strong>condivisione del kernel<\/strong>. Bisogna poi osservare come, utilizzando i container, non \u00e8 possibile eseguire contemporaneamente sistemi operativi differenti sullo stesso hardware.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cosa sono i container e in cosa sono diversi dalle macchine virtuali? Quale sistema \u00e8 meglio utilizzare? Vediamo pi\u00f9 nel dettaglio in cosa consiste questa tecnologia ancora poco utilizzata. Il container pu\u00f2 essere definito come una sorta di server virtualizzato a livello di sistema operativo a differenza delle macchine virtuali che sono istanze dell&#8217;intero server [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":28832,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","footnotes":""},"categories":[32],"tags":[539,290,168,53],"class_list":["post-28665","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hosting","tag-container","tag-programmazione","tag-server","tag-software"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Container vs Macchine Virtuali - blog.artera.net<\/title>\n<meta name=\"description\" content=\"Cosa sono i container e in cosa sono diversi dalle macchine virtuali? Quale sistema \u00e8 meglio utilizzare? 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