{"id":33050,"date":"2019-10-31T21:50:27","date_gmt":"2019-10-31T18:50:27","guid":{"rendered":"https:\/\/prohoster.info\/blog\/application-centric-infrastructure-arhitektura-seti-budushhego-ot-rassuzhdenij-k-delu\/"},"modified":"2019-10-31T21:50:27","modified_gmt":"2019-10-31T18:50:27","slug":"application-centric-infrastructure-arhitektura-seti-budushhego-ot-rassuzhdenij-k-delu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/administrirovanie\/application-centric-infrastructure-arhitektura-seti-budushhego-ot-rassuzhdenij-k-delu","title":{"rendered":"Application Centric Infrastructure. Fremtidens netv\u00e6rksarkitektur \u2014 fra overvejelser til handling","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>I de seneste \u00e5r har Cisco aktivt promoveret en ny arkitektur til opbygning af datanetv\u00e6rk i datacentre \u2013 <b>Application Centric Infrastructure (eller ACI)<\/b>. Nogle er allerede bekendt med den. Andre har endda implementeret den i deres virksomheder, herunder i Rusland. For de fleste IT-specialister og IT-ledere er ACI endnu enten en uforst\u00e5elig forkortelse eller blot en diskussion om fremtiden. <br \/>\nI denne artikel vil vi fors\u00f8ge at g\u00f8re denne fremtid mere n\u00e6rv\u00e6rende. Vi vil fort\u00e6lle om de vigtigste arkitektoniske komponenter i ACI samt illustrere, hvordan den anvendes i praksis. Derudover vil vi snart organisere en visuel demonstration af ACI, som hver interesseret IT-specialist kan tilmelde sig.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nMan kan l\u00e6re mere om den nye arkitektur til opbygning af netv\u00e6rk i Sankt Petersborg i maj 2019. Alle detaljer \u2013 via <noindex><a rel=\"nofollow\" href=\"https:\/\/cisco.promo\/aci\/\">linket<\/a><\/noindex>. Tilmeld dig!<\/p>\n<p><b>Background<\/b><br \/>\nDen traditionelle og mest popul\u00e6re model til opbygning af netv\u00e6rk er den tre-lags hierarkiske model: kerne -&gt; distribution (aggregering) -&gt; adgang. I mange \u00e5r har denne model v\u00e6ret en standard, og producenter har udviklet forskellige netv\u00e6rksenheder baseret p\u00e5 denne funktionalitet. <br \/>\nTidligere, da informationsteknologi var en slags n\u00f8dvendig (og, lad os v\u00e6re \u00e6rlige, ikke altid \u00f8nsket) supplement til forretningen, var denne model praktisk, ret statisk og p\u00e5lidelig. Men nu, n\u00e5r IT er en af drivkr\u00e6fterne bag forretningsudvikling og i mange tilf\u00e6lde selve forretningen, begyndte statikken i denne model at skabe store problemer.<\/p>\n<p>Moderne forretninger genererer et stort antal forskellige komplekse krav til netv\u00e6rksinfrastrukturen. Succes for virksomheden afh\u00e6nger direkte af, hvor hurtigt disse krav kan opfyldes. I s\u00e5danne tilf\u00e6lde er forsinkelser uacceptable, og den klassiske model for netv\u00e6rksopbygning opfylder ofte ikke alle forretningsbehov til tiden. <\/p>\n<p>For example, the emergence of a new complex business application requires network administrators to perform a large number of similar routine operations on many different network devices at various levels. Besides taking a lot of time, it also increases the risk of making a mistake that could lead to significant downtime of IT services and, consequently, financial losses.<\/p>\n<p>The root of the problem is not even the deadlines or the complexity of the requirements. The issue is that these requirements need to be 'translated' from the language of business applications into the language of network infrastructure. As we know, any translation always entails a partial loss of meaning. When the application owner talks about the logic of how their application works, the network administrator thinks in terms of VLANs, Access lists across dozens of devices, which need to be maintained, updated, and documented.<\/p>\n<p>The accumulated experience and continuous communication with customers have enabled Cisco to design and implement new principles for building data transmission networks in data centers that respond to modern trends and are primarily based on the logic of business applications. Hence the name \u2014 Application Centric Infrastructure.<\/p>\n<p><b>ACI Architecture.<\/b><br \/>\nThe ACI architecture is best viewed not from a physical standpoint but from a logical one. It is based on an automated policy model, the objects of which can be divided at the highest level into the following components:<\/p>\n<ol>\n<li> Network based on Nexus switches.<\/li>\n<li> APIC controller cluster;<\/li>\n<li> Application profiles;<\/li>\n<\/ol>\n<p>\n<img decoding=\"async\" alt=\"Application Centric Infrastructure. Fremtidens netv\u00e6rksarkitektur \u2014 fra overvejelser til handling\" src=\"\/wp-content\/uploads\/2019\/05\/20e9a71dd5bb720b30095676326142d5.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nLet\u2019s look at each level in more detail \u2014 moving from simple to complex.<\/p>\n<p><b>Network based on Nexus switches.<\/b><br \/>\nThe network in the ACI fabric resembles a traditional hierarchical model but is built much more simply. The Leaf-Spine model is used for network organization, which has become an accepted approach for implementing next-generation networks. This model consists of two levels: Spine and Leaf, respectively.<br \/>\n <img decoding=\"async\" alt=\"Application Centric Infrastructure. Fremtidens netv\u00e6rksarkitektur \u2014 fra overvejelser til handling\" src=\"\/wp-content\/uploads\/2019\/05\/0e232d48c7fe664a801d45b6dbb474a7.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nThe Spine level is solely responsible for performance. The total performance of the Spine switches equals the performance of the entire fabric, so switches with ports of 40G or higher should be used at this level. <br \/>\nSpine-switches forbinder alle switcher p\u00e5 n\u00e6ste niveau: Leaf-switcher, som de endelige v\u00e6rter tilsluttes. Den prim\u00e6re rolle for Leaf-switcherne er portkapaciteten. <\/p>\n<p>Dermed l\u00f8ses skaleringsproblemer nemt: hvis vi skal \u00f8ge b\u00e5ndbredden i fabrikken, tilf\u00f8jer vi Spine-switcher, og hvis vi skal \u00f8ge portkapaciteten \u2013 Leaf.<br \/>\nBegge niveauer bruger switcher fra serien Cisco Nexus 9000, som er det prim\u00e6re v\u00e6rkt\u00f8j for Cisco til opbygning af datacenter-netv\u00e6rk uanset deres arkitektur. Til Spine-niveauet bruges Nexus 9300- eller Nexus 9500-switcher, mens der kun bruges Nexus 9300 til Leaf. <br \/>\nModellinjen af switches fra Nexus, der anvendes i ACI-fabrikken, er vist p\u00e5 billedet nedenfor.<br \/>\n <img decoding=\"async\" alt=\"Application Centric Infrastructure. Fremtidens netv\u00e6rksarkitektur \u2014 fra overvejelser til handling\" src=\"\/wp-content\/uploads\/2019\/05\/0c166b8f16dafcd2f297102306cdb6ba.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><b>APIC-controller-klyngen (Application Policy Infrastructure Controller) <\/b><br \/>\nAPIC-controllere er specialiserede fysiske servere, hvor det er tilladt at bruge en klynge best\u00e5ende af en fysisk APIC-controller og to virtuelle til sm\u00e5 installationer. <br \/>\nAPIC-controllerne udf\u00f8rer administrations- og overv\u00e5gningsfunktioner. Det er vigtigt, at controllerne aldrig deltager i dataoverf\u00f8rsel, hvilket betyder, at selvom alle controllerne i klyngen skulle svigte, vil det ikke p\u00e5virke netv\u00e6rkets stabilitet. Det skal ogs\u00e5 bem\u00e6rkes, at med hj\u00e6lp fra APIC kan administratoren styre alle fysiske og logiske ressourcer i fabrikken, og for at foretage \u00e6ndringer kr\u00e6ves det ikke l\u00e6ngere at oprette forbindelse til enhederne, da ACI bruger et enkelt kontrolpunkt.<br \/>\n <img decoding=\"async\" alt=\"Application Centric Infrastructure. Fremtidens netv\u00e6rksarkitektur \u2014 fra overvejelser til handling\" src=\"\/wp-content\/uploads\/2019\/05\/212db035b1471afad49cbb77ecfe039a.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><b>Lad os nu g\u00e5 videre til en af de vigtigste komponenter i ACI \u2013 applikationsprofiler.<\/b><br \/>\n<b>Applikationsprofil (Application Network Profile)<\/b> er det logiske grundlag for ACI. Det er netop applikationsprofilerne, der definerer politikkerne for interaktion mellem alle netv\u00e6rkssegmenter og beskriver selve netv\u00e6rkssegmenterne. ANP g\u00f8r det muligt at abstrahere fra det fysiske niveau og reelt forestille sig, hvordan interaktionen mellem forskellige netv\u00e6rkssegmenter skal organiseres set fra applikationens perspektiv. <\/p>\n<p>Applikationens profil best\u00e5r af forbindelsesgrupper (End-point groups \u2013 EPG). En forbindelsesgruppe er en logisk gruppe af v\u00e6rter (virtuel maskiner, fysiske servere, containere osv.), der befinder sig i et enkelt sikkerhedssegment (ikke netv\u00e6rk, men specifikt sikkerhed). De endelige v\u00e6rter, der tilh\u00f8rer en bestemt EPG, kan bestemmes ud fra mange kriterier. Normalt bruges f\u00f8lgende: <\/p>\n<ul>\n<li>Fysisk port<\/li>\n<li>Logisk port (portgruppe p\u00e5 en virtuel switch)<\/li>\n<li>VLAN ID eller VXLAN<\/li>\n<li>IP-adresse eller IP-undernet<\/li>\n<li>Serverattributter (navn, placering, OS-version osv.)<\/li>\n<\/ul>\n<p>\nTil interaktion mellem forskellige EPG'er er der en enhed kaldet kontrakter. En kontrakt definerer relationerne mellem forskellige EPG'er. Med andre ord, kontrakten bestemmer, hvilken service en EPG leverer til en anden EPG. For eksempel, vi opretter en kontrakt, der g\u00f8r det muligt for trafik at flyde over HTTPS-protokollen. Derefter forbinder vi denne kontrakt, for eksempel, EPG Web (gruppe af webservere) og EPG App (gruppe af applikationsservere), hvorefter disse to endepunktsgrupper kan udveksle trafik over HTTPS-protokollen.<\/p>\n<p>Illustrationen nedenfor viser et eksempel p\u00e5 ops\u00e6tning af forbindelsen mellem forskellige EPG'er via kontrakter inden for \u00e9n ANP.<br \/>\n <img decoding=\"async\" alt=\"Application Centric Infrastructure. Fremtidens netv\u00e6rksarkitektur \u2014 fra overvejelser til handling\" src=\"\/wp-content\/uploads\/2019\/05\/b92201fbfe05298bb1511dfd5a3ebd7f.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nDer kan v\u00e6re et vilk\u00e5rligt antal applikationsprofiler inden for en ACI-fabrik. Desuden er kontrakter ikke bundet til en specifik applikationsprofil, de kan (og b\u00f8r) bruges til at forbinde EPG'er i forskellige ANP'er.<\/p>\n<p>I grund essence beskrives hver applikation, som p\u00e5 en eller anden m\u00e5de har brug for et netv\u00e6rk, af sin egen profil. For eksempel i diagrammet ovenfor vises en standardarkitektur for en tre-lags applikation, der best\u00e5r af et vilk\u00e5rligt antal servere til ekstern adgang (Web), applikationsservere (App) og database-servere (DB), samt reglerne for interaktionen mellem dem. I den traditionelle netv\u00e6rksinfrastruktur ville dette v\u00e6re et s\u00e6t regler, der er skrevet p\u00e5 forskellige enheder i infrastrukturen. I ACI-arkitekturen beskriver vi disse regler inden for \u00e9n applikationsprofil. ACI g\u00f8r det muligt at forenkle oprettelsen af \u200b\u200bet stort antal indstillinger p\u00e5 forskellige enheder ved at gruppere dem alle i en enkelt profil. <br \/>\nIllustrationen nedenfor viser et mere realistisk eksempel. Applikationsprofilen Microsoft Exchange, sammensat af flere EPG'er og kontrakter.<br \/>\n <img decoding=\"async\" alt=\"Application Centric Infrastructure. Fremtidens netv\u00e6rksarkitektur \u2014 fra overvejelser til handling\" src=\"\/wp-content\/uploads\/2019\/05\/46d4e8e088a815233c65c58da7c8624e.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Central styring, automatisering og overv\u00e5gning er en af ACI's n\u00f8glefordele. ACI-fabrikken befrier administratorer fra den rutinepr\u00e6gede opgave med at oprette et stort antal regler p\u00e5 forskellige switcher, routere og firewalls (den klassiske manuelle konfiguration er dog tilladt og kan bruges). Indstillinger for applikationsprofiler og andre ACI-objekter anvendes automatisk i hele ACI-fabrikken. Selv ved fysisk skift af servere til andre porte p\u00e5 fabrikkens switcher er der ikke behov for at duplikere indstillinger fra de gamle switcher til de nye og rydde op i un\u00f8dvendige regler. Baseret p\u00e5 kriterierne for v\u00e6rtens tilh\u00f8rsforhold til EPG vil fabrikken automatisk udf\u00f8re disse indstillinger og rydde op i ubrugte regler. <br \/>\nDe integrerede sikkerhedspolitikker i ACI implementeres efter princippet om hvidlister; det vil sige, at alt, der ikke eksplicit er tilladt, som standard er forbudt. I kombination med automatisk opdatering af konfigurationer af netv\u00e6rksudstyr (fjernelse af 'glemte' ubruge regler og tilladelser) \u00f8ger denne tilgang i h\u00f8j grad det samlede sikkerhedsniveau i netv\u00e6rket og indsn\u00e6vrer den potentielle angrebsflade.<\/p>\n<p>ACI muligg\u00f8r netv\u00e6rksinteraktion ikke kun for virtuelle maskiner og containere, men ogs\u00e5 for fysiske servere, hardware firewalls og netv\u00e6rksudstyr fra tredjepartsleverand\u00f8rer, hvilket g\u00f8r ACI til en unik l\u00f8sning p\u00e5 nuv\u00e6rende tidspunkt. <br \/>\nCiscos nye tilgang til opbygning af datatransmissionsnetv\u00e6rk baseret p\u00e5 applikationslogik er ikke kun automatisering, sikkerhed og centraliseret styring. Det er ogs\u00e5 et moderne horisontalt skalerbart netv\u00e6rk, der opfylder alle kravene fra nutidens virksomheder.<br \/>\nImplementeringen af netv\u00e6rksinfrastruktur baseret p\u00e5 ACI g\u00f8r det muligt for alle virksomhedens afdelinger at kommunikere p\u00e5 \u00e9t f\u00e6lles sprog. Administratoren styres kun af applikationens logik, som beskriver de n\u00f8dvendige regler og forbindelser. Ligesom applikationens logik ogs\u00e5 guider ejere og udviklere af applikationen, informationssikkerhedsteamet, \u00f8konomer og virksomhedsejere. <\/p>\n<p>P\u00e5 den m\u00e5de implementerer Cisco i praksis konceptet for n\u00e6ste generations datacenter-netv\u00e6rk. Vil du selv opleve det? Kom til demonstration. <b>Application Centric Infrastructure<\/b> i Sankt Petersborg, og arbejd med fremtidens datacenter-netv\u00e6rk allerede nu. <br \/>\nTilmeld dig arrangementet <noindex><a rel=\"nofollow\" href=\"https:\/\/cisco.promo\/aci\/\">via linket<\/a><\/noindex>.<br \/>\n<br \/>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/cisco\/blog\/450650\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0435 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043b\u0435\u0442 Cisco \u0430\u043a\u0442\u0438\u0432\u043d\u043e \u043f\u0440\u043e\u0434\u0432\u0438\u0433\u0430\u0435\u0442 \u043d\u043e\u0432\u0443\u044e \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0443 \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u044f \u0441\u0435\u0442\u0438 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0426\u041e\u0414 \u2014 Application Centric Infrastructure (\u0438\u043b\u0438 ACI). \u041d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0441 \u043d\u0435\u0439 \u0443\u0436\u0435 \u0437\u043d\u0430\u043a\u043e\u043c\u044b. \u0410 \u043a\u0442\u043e-\u0442\u043e \u0434\u0430\u0436\u0435 \u0443\u0441\u043f\u0435\u043b \u0432\u043d\u0435\u0434\u0440\u0438\u0442\u044c \u0435\u0451 \u043d\u0430 \u0441\u0432\u043e\u0438\u0445 \u043f\u0440\u0435\u0434\u043f\u0440\u0438\u044f\u0442\u0438\u044f\u0445, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u0438 \u0432 \u0420\u043e\u0441\u0441\u0438\u0438. \u041e\u0434\u043d\u0430\u043a\u043e \u0434\u043b\u044f \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0430 \u0418\u0422-\u0441\u043f\u0435\u0446\u0438\u0430\u043b\u0438\u0441\u0442\u043e\u0432 \u0438 \u0418\u0422-\u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u0439 ACI \u043f\u043e\u043a\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043b\u0438\u0431\u043e \u043d\u0435\u043f\u043e\u043d\u044f\u0442\u043d\u043e\u0439 \u0430\u0431\u0431\u0440\u0435\u0432\u0438\u0430\u0442\u0443\u0440\u043e\u0439, \u043b\u0438\u0431\u043e \u0432\u0441\u0435\u0433\u043e \u043b\u0438\u0448\u044c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":24807,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-33050","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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