{"id":4396,"date":"2013-09-05T14:47:12","date_gmt":"2013-09-05T12:47:12","guid":{"rendered":"http:\/\/blog.websupport.sk\/?p=4396"},"modified":"2025-03-11T21:06:20","modified_gmt":"2025-03-11T20:06:20","slug":"ako-pokracujeme-s-novou-architekturou","status":"publish","type":"post","link":"https:\/\/www.websupport.sk\/blog\/2013\/09\/ako-pokracujeme-s-novou-architekturou\/","title":{"rendered":"Ako pokra\u010dujeme s novou architekt\u00farou"},"content":{"rendered":"Doba \u010d\u00edtania:<\/b><\/span> 5<\/span> min.<\/span><\/span>

Ubehlo pribli\u017ene 11 mesiacov, odkedy sme zapo\u010dali zatia\u013e n\u00e1\u0161 najkomplexnej\u0161\u00ed projekt kompletnej reorganiz\u00e1cie cel\u00e9ho IT. Ver\u00edme, \u017ee v niektorom z nasleduj\u00facich blogov sa dostaneme k detailom dizajnu a samotnej hist\u00f3rii tohto projektu. Dnes sa v\u0161ak zameriame na aktu\u00e1lny stav. <\/p>\n

Nov\u00fd hardv\u00e9r, o ktorom ste sa mali mo\u017enos\u0165 dozvedie\u0165 z blogu<\/a>, k n\u00e1m dorazil u\u017e za\u010diatkom j\u00fana. Cel\u00e1 jeho kompletiz\u00e1cia trvala cca mesiac, pri\u010dom v\u00fdsledok je nasledovn\u00fd:<\/p>\n

\"rack\"<\/p>\n

Nov\u00e1 architekt\u00fara v\u0161ak nie je len o novom hardv\u00e9ri. Nov\u00fd hardv\u00e9r je len \u010das\u0165ou celej mozaiky, ktor\u00e1 zah\u0155\u0148a nasledovn\u00e9 prvky:
\n– nov\u00fd hardv\u00e9r
\n– virtualiz\u00e1cia \/ logick\u00e1 infra\u0161trukt\u00fara
\n– konfigura\u010dn\u00fd mana\u017ement
\n– admin team\/change mana\u017ement<\/p>\n

U\u017e nejak\u00fa dobu, obzvl\u00e1\u0161\u0165 v\u0161ak ostatn\u00e9 dva mesiace, pracujeme hlavne na konfigura\u010dnom mana\u017emente, automatiz\u00e1cii a virtualiz\u00e1cii. Pre tieto \u00fa\u010dely sme boli n\u00faten\u00ed osvoji\u0165 si mno\u017estvo nov\u00fdch technol\u00f3gi\u00ed. Za v\u0161etky spomeniem CFEngine3 <\/strong>a OpenStack<\/strong>. Bolo ich v\u0161ak podstatne viac.<\/p>\n

Na\u0161\u00edm cie\u013eom je dosiahnu\u0165 automatick\u00e9 vygenerovanie cel\u00e9ho syst\u00e9mu na nov\u00fdch serveroch, od automatizovanej in\u0161tal\u00e1cie fyzick\u00fdch serverov, cez in\u0161tal\u00e1ciu OpenStacku a\u017e po vytvorenie logickej infra\u0161trukt\u00fary z virtu\u00e1lnych serverov pre slu\u017ebu zdie\u013ean\u00e9ho hostingu. V\u0161etko sa to udeje na z\u00e1klade „programu“, ktor\u00fd p\u00ed\u0161eme v jazyku CFEengine3 a predstavuje tak ak\u00e9si DNA nov\u00e9ho IT.<\/p>\n

Tieto pokusy prebiehaj\u00fa po\u010das integra\u010dn\u00e9ho testovania, ktor\u00e9 prebehlo v auguste u\u017e trikr\u00e1t, pri\u010dom ka\u017ed\u00fdm \u010fal\u0161\u00edm pokusom sme dosiahli vy\u0161\u0161iu mieru automatiz\u00e1cie. V s\u00fa\u010dasnosti sme na prahu \u0161tvrt\u00e9ho integra\u010dn\u00e9ho testu, kde u\u017e bude doplnen\u00e1 posledn\u00e1 ch\u00fdbaj\u00faca s\u00fa\u010das\u0165 – automatizovan\u00e1 in\u0161tal\u00e1cia OpenStacku.<\/p>\n

Len pre predstavu: in\u0161tal\u00e1ciu fyzick\u00e9ho servera s OS Ubuntu minimal sme boli schopn\u00ed pomocou automatiz\u00e1cie skr\u00e1ti\u0165 na \u00farove\u0148 3 min\u00fat oproti pribli\u017enej polhodine a viac, ke\u010f sa v\u0161etko robilo ru\u010dne. Tu sa ukazuje sila automatiz\u00e1cie – 10-n\u00e1sobn\u00e9 skr\u00e1tenie \u010dasu bez \u013eudsk\u00e9ho z\u00e1sahu v\u00fdrazne \u0161etr\u00ed \u010das a zni\u017euje n\u00e1klady.<\/p>\n

OpenStack<\/strong>
\nOpenStack za\u017e\u00edva v tomto obdob\u00ed obrovsk\u00fd rast a denne do jeho projektov pribudn\u00fa stovky zmien od jeho v\u00fdvoj\u00e1rov. Je to komplexn\u00fd bal\u00edk projektov, ktor\u00e9 nie je v\u00f4bec jednoduch\u00e9 rozbeha\u0165 na produk\u010dn\u00fa \u00farove\u0148, i ke\u010f existuj\u00fa r\u00f4zne one-click in\u0161tal\u00e1cie. \u010castokr\u00e1t je nutn\u00e9 \u010d\u00edtanie zdrojov\u00fdch k\u00f3dov ako dokument\u00e1cie, fixovanie r\u00f4znych bugov vlastn\u00fdmi alebo u\u017e existuj\u00facimi patchmi. Na produk\u010dn\u00e9 nasadenie je nutn\u00e9 prekona\u0165 mno\u017estvo probl\u00e9mov a nau\u010di\u0165 sa rozumie\u0165 OpenStacku, \u010do trv\u00e1 oby\u010dajne nieko\u013eko mesiacov. U n\u00e1s toto zoznamovanie prebieha u\u017e pribli\u017ene 4-5 mesiacov.<\/p>\n

V pr\u00edpade produk\u010dn\u00e9ho nasadenia v rozsahu WebSupportu je nutn\u00e9 zv\u00e1\u017ei\u0165, \u010do potrebujeme a \u010do nie. Najkomplikovanej\u0161\u00ed sa uk\u00e1zal by\u0165 networking, resp. projekt Neutron<\/strong>, ktor\u00fd je ur\u010den\u00fd na vytv\u00e1ranie tzv. Software Defined Network<\/strong>. Tie umo\u017e\u0148uj\u00fa vytv\u00e1ra\u0165 r\u00f4zne virtu\u00e1lne siete, vz\u00e1jomne oddelen\u00e9 pre r\u00f4znych tenantov. Tenantom sa ch\u00e1pe niekto, kto m\u00e1 vyhraden\u00fa iba \u010das\u0165 zdrojov z cloudu.<\/p>\n

Zo za\u010diatku nepl\u00e1nujeme poskytova\u0165 priamy pr\u00edstup k API OpenStacku z\u00e1kazn\u00edkom, ale d\u00fafame, \u017ee v bl\u00edzkej bud\u00facnosti to dorie\u0161ime.<\/p>\n

\"horizon\"<\/p>\n

Networking je v\u0161ak jedin\u00e1 vec, ktor\u00e1 n\u00e1s sp\u00e1ja so star\u00fdm IT, tak\u017ee neza\u010d\u00edname na zelenej l\u00fake, ale mus\u00edme by\u0165 sp\u00e4tne kompatibiln\u00ed. Neutron n\u00e1m to neumo\u017e\u0148oval a pre pridan\u00fa komplexnos\u0165 a nie \u00fapln\u00fa pripravenos\u0165 sme sa rozhodli SDN aktu\u00e1lne nepou\u017ei\u0165. Mysl\u00edme v\u0161ak na bud\u00facnos\u0165, tak\u017ee sme premysleli, ako by sa to dalo nesk\u00f4r zapracova\u0165.<\/p>\n

\u010eal\u0161\u00edm pr\u00edpadom na zv\u00e1\u017eenie bol v\u00fdber pou\u017eitia diskov\u00e9ho syst\u00e9mu na ukladanie obrazov in\u0161tanci\u00ed. V OpenStacku s\u00fa mo\u017enosti pou\u017ei\u0165 ne-perzistentn\u00e9 diskov\u00e9 obrazy cez aplik\u00e1ciu Nova <\/strong>alebo perzistentn\u00e9 cez aplik\u00e1ciu Cinder<\/strong>. Ke\u010f\u017ee Cinder sa d\u00e1 prepoji\u0165 priamo s diskov\u00fdm po\u013eom NetApp, vo\u013eba je jasn\u00e1.<\/p>\n

\u010casto sa stret\u00e1vame s n\u00e1zorom, \u017ee samotn\u00fd OpenStack je ak\u00e1si forma virtualiz\u00e1cie. To nie je \u00fapln\u00e1 pravda, vzh\u013eadom na to, \u017ee o virtualiz\u00e1ciu sa star\u00e1 hyperv\u00edzor ako Xen<\/strong>, KVM <\/strong>a pod. OpenStack je s\u00fabor programov s definovan\u00fdm rozhran\u00edm (API), ktor\u00e9 zabezpe\u010duj\u00fa orchestr\u00e1ciu (riadenie) procesov v s\u00favislosti so \u017eivotn\u00fdm cyklom virtu\u00e1lnych serverov. To, ak\u00fd hyperv\u00edzor je pou\u017eit\u00fd, je vyslovene na pou\u017e\u00edvate\u013eovi.<\/p>\n

Nieko\u013eko rokov u\u017e pou\u017e\u00edvame na t\u00fato orchestr\u00e1ciu s\u00fabor vlastn\u00fdch skriptov, ktor\u00e9 v\u0161ak nie s\u00fa tak\u00e9 komplexn\u00e9 ako OpenStack, ktor\u00fd vyv\u00edjaj\u00fa stovky v\u00fdvoj\u00e1rov.<\/p>\n

Dlho sme rie\u0161ili v\u00fdber medzi Xenom a KVM. Vzh\u013eadom na dlhoro\u010dn\u00e9 sk\u00fasenosti so Xenom sme boli dlho naklonen\u00ed tejto alternat\u00edve. Integr\u00e1cia a podpora KVM do OpenStacku sa v\u0161ak uk\u00e1zala ako k\u013e\u00fa\u010dov\u00e1, a tak sme sa priklonili ku KVM<\/strong>. <\/p>\n

Vytvorenie paralelnej IT infra\u0161trukt\u00fary pre n\u00e1s znamen\u00e1 aj mo\u017enos\u0165 zahodi\u0165 niektor\u00e9 verzie programov a nahradi\u0165 ich nov\u00fdmi. K zmene d\u00f4jde nasledovne:
\n– datab\u00e1zy MySQL 5.0 a 5.1 bud\u00fa presunut\u00e9 na MariaDB 5.5
\n– medzi podporovan\u00e9 PHP pribudne PHP 5.5
\n– ru\u0161\u00edme podporu eacceleratora a nahrad\u00edme ho xcache
\n– meni\u0165 verziu PHP nebude mo\u017en\u00e9 cez .htaccess s\u00fabor, ale len cez webadmin rozhranie
\n– v pr\u00edpade virtu\u00e1lnych serverov prechadzame zo Xenu na KVM<\/p>\n

V\u0161etk\u00fdm pou\u017e\u00edvate\u013eom z\u00e1rove\u0148 odpor\u00fa\u010dame upgradeova\u0165 na verziu PHP 5.3 a vy\u0161\u0161ie a v pr\u00edpade MySQL datab\u00e1z na verziu 5.5 .
\nVerzie:
\n– MySQL 4.0,4.1
\n– PHP 4.4.9 <\/p>\n

Na hostingu bud\u00fa pou\u017eite\u013en\u00e9 aj na\u010falej, av\u0161ak nebud\u00fa ma\u0165 k dispoz\u00edcii to\u013eko zdrojov ako nov\u0161ie verzie. O v\u0161etk\u00fdch detailn\u00fdch zmen\u00e1ch a samotnej migr\u00e1cii budeme samozrejme informova\u0165. <\/p>\n","protected":false},"excerpt":{"rendered":"

Ubehlo pribli\u017ene 11 mesiacov, odkedy sme zapo\u010dali zatia\u013e n\u00e1\u0161 najkomplexnej\u0161\u00ed projekt kompletnej reorganiz\u00e1cie cel\u00e9ho IT. Ver\u00edme, \u017ee v niektorom z nasleduj\u00facich blogov sa dostaneme k detailom dizajnu a samotnej hist\u00f3rii tohto projektu. Dnes sa v\u0161ak zameriame na aktu\u00e1lny stav.<\/p>\n","protected":false},"author":30,"featured_media":5591,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,7,11],"tags":[81,349],"class_list":["post-4396","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novinky","category-technologie","category-zakulisie","tag-architektura","tag-hosting"],"yoast_head":"\nAko pokra\u010dujeme s novou architekt\u00farou - Websupport blog<\/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:\/\/www.websupport.sk\/blog\/2013\/09\/ako-pokracujeme-s-novou-architekturou\/\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ako pokra\u010dujeme s novou architekt\u00farou - Websupport blog\" \/>\n<meta property=\"og:description\" content=\"Ubehlo pribli\u017ene 11 mesiacov, odkedy sme zapo\u010dali zatia\u013e n\u00e1\u0161 najkomplexnej\u0161\u00ed projekt kompletnej reorganiz\u00e1cie cel\u00e9ho IT. Ver\u00edme, \u017ee v niektorom z nasleduj\u00facich blogov sa dostaneme k detailom dizajnu a samotnej hist\u00f3rii tohto projektu. 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