{"id":40138,"date":"2020-01-31T20:49:06","date_gmt":"2020-01-31T17:49:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/katastrofoustojchivoe-oblako-kak-eto-rabotaet"},"modified":"2020-01-31T20:49:06","modified_gmt":"2020-01-31T17:49:06","slug":"katastrofoustojchivoe-oblako-kak-eto-rabotaet","status":"publish","type":"post","link":"https:\/\/prohoster.info\/lv\/blog\/katastrofoustojchivoe-oblako-kak-eto-rabotaet","title":{"rendered":"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Sveiki, Habr! <\/p>\n<p>P\u0113c Ziemassv\u0113tku br\u012bvdien\u0101m m\u0113s atjaunoj\u0101m katastrofu iztur\u012bgu m\u0101ko\u0146u uz div\u0101m viet\u0101m. \u0160odien past\u0101st\u012bsim, k\u0101 tas ir iek\u0101rtots, un par\u0101d\u012bsim, kas notiek ar klientu virtu\u0101laj\u0101m ma\u0161\u012bn\u0101m, ja atsevi\u0161\u0137i klastera elementi neizdodas vai vesela vieta sabr\u016bk (spoilers \u2013 ar vi\u0146iem viss k\u0101rt\u012bb\u0101). <\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/58b56261b55785a76bce3e754c86f6a9.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Katastrofu iztur\u012bgs m\u0101ko\u0146a S\u0100DOSTOSTEDE pie OST vietas.<\/i><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Kas iek\u0161\u0101<\/h3>\n<p>\nKl\u0101ster\u012b atrodas Cisco UCS serveri ar VMware ESXi hipervizoru, divi INFINIDAT InfiniBox F2240 S\u0100DOSTOSTEDE, Cisco Nexus t\u012bkla apr\u012bkojums, k\u0101 ar\u012b Brocade SAN sl\u0113d\u017ei. Kl\u0101steris ir izklied\u0113ts uz div\u0101m viet\u0101m \u2013 OST un NORD, t\u0101d\u0113j\u0101di katr\u0101 datu centr\u0101 ir identisks apr\u012bkojuma kopums. \u0160is ir tas, kas to padara katastrofu iztur\u012bgu. <\/p>\n<p>Viens un taj\u0101 pa\u0161\u0101 viet\u0101 galvenie elementi ar\u012b ir dubultoti (hosti, SAN sl\u0113d\u017ei, t\u012bkli).<br \/>\nDivas vietas ir savienotas ar atsevi\u0161\u0137iem optisk\u0101s \u0161\u0137iedras mar\u0161rutiem, kas ar\u012b ir rezerv\u0113ti.<\/p>\n<p>Da\u017ei v\u0101rdi par S\u0100DOSTOSTEDE. Pirmaj\u0101 katastrofu iztur\u012bg\u0101 m\u0101ko\u0146a variant\u0101 m\u0113s b\u016bv\u0113jam uz NetApp. \u0160eit izv\u0113l\u0113j\u0101mies INFINIDAT, un \u0161eit ir iemesli:<\/p>\n<ul>\n<li>Active-Active replik\u0101cijas opcija. T\u0101 \u013cauj virtu\u0101lajai ma\u0161\u012bnai palikt funkcion\u0101l\u0101 st\u0101vokl\u012b pat pilna atsevi\u0161\u0137\u0101s S\u0100DOSTOSTEDE neveiksm\u0113. Par replik\u0101ciju past\u0101st\u012b\u0161u detaliz\u0113t\u0101k v\u0113l\u0101k.<\/li>\n<li>Tr\u012bs disku kontrolieri, lai uzlabotu sist\u0113mas iztur\u012bbu. Parasti ir divi.<\/li>\n<li>Gatava risin\u0101juma. Pie mums ierad\u0101s jau salikta stenda, kuru tikai j\u0101pie\u0161\u0137ir t\u012bklam un j\u0101iestata.<\/li>\n<li>R\u016bp\u012bga tehnisk\u0101 atbalsta komanda. INFINIDAT in\u017eenieri nep\u0101rtraukti analiz\u0113 S\u0100DOSTOSTEDE \u017eurn\u0101lus un notikumus, instal\u0113 jaunas versijas oper\u0113t\u0101jsist\u0113m\u0101, pal\u012bdz ar iestat\u012bjumiem.<\/li>\n<\/ul>\n<p>\n\u0160eit ir nedaudz bildes no unpacking\u2019a:<\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/b953a56bba9f0308f5fe1b27b356683b.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/94b5ceb8565ebe1ef2aacff943e1a9d0.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>K\u0101 tas darbojas<\/h3>\n<p>\nM\u0101ko\u0146i jau ir katastrofu iztur\u012bgi sev\u012b. Tas aizsarg\u0101 klientu no individu\u0101liem aparat\u016bras un programmat\u016bras neveiksm\u0113m. Katrastrofu iztur\u012bgs m\u0101ko\u0146i pal\u012bdz\u0113s aizsarg\u0101t pret masveida trauc\u0113jumiem vienas vietas ietvaros: piem\u0113ram, S\u0100DOSTOSTEDE (vai SDS klastera) k\u013c\u016bme, kas notiek diezgan bie\u017ei \ud83d\ude42 , masveida k\u013c\u016bdas glab\u0101\u0161anas t\u012bkl\u0101 un citiem. Un pats galvenais: \u0161\u0101ds m\u0101konis gl\u0101bs, kad visa vieta k\u013c\u016bst nepieejama ugunsgr\u0113ka, blackout, reideru ie\u0146em\u0161anas, vai sve\u0161zemju iek\u0161lietu d\u0113\u013c. <\/p>\n<p>Visos \u0161ajos gad\u012bjumos klientu virtu\u0101l\u0101s ma\u0161\u012bnas turpin\u0101s str\u0101d\u0101t, un \u0161eit ir iemesli. <\/p>\n<p>Klastera sh\u0113ma ir izveidota t\u0101, lai jebkur\u0161 ESXi viesis ar klientu virtu\u0101laj\u0101m ma\u0161\u012bn\u0101m var\u0113tu piek\u013c\u016bt jebkurai no div\u0101m S\u0136D. Ja S\u0136D viet\u0101 OST iziet no ierindas, virtu\u0101l\u0101s ma\u0161\u012bnas turpin\u0101s darboties: viesi, uz kuriem t\u0101s darbojas, piepras\u012bs datus no S\u0136D NORD. <\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/996193debdab5b3564c97b05b1e5ba27.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>T\u0101 izskat\u0101s piesl\u0113guma sh\u0113ma klaster\u012b. <\/i><\/p>\n<p>Tas ir iesp\u0113jams, pateicoties tam, ka starp divu vietu SAN fabrik\u0101m ir iestat\u012bts Inter-Switch Link: SAN sl\u0113dzis Fabric A OST ir savienots ar SAN sl\u0113dzi Fabric A NORD, un l\u012bdz\u012bgi ar\u012b SAN sl\u0113d\u017eiem Fabric B. <\/p>\n<p>Lai vis\u0101m \u0161\u012bm sare\u017e\u0123\u012btaj\u0101m SAN fabrik\u0101m b\u016btu j\u0113ga, starp ab\u0101m S\u0136D ir iestat\u012bta Akt\u012bva-Akt\u012bva replik\u0101cija: inform\u0101cija praktiski vienlaic\u012bgi tiek ierakst\u012bta lok\u0101laj\u0101 un att\u0101laj\u0101 S\u0136D, RPO=0. T\u0101d\u0113j\u0101di uz vienas S\u0136D ir ori\u0123in\u0101lie dati, uz otras - to replik\u0101cija. Dati tiek replik\u0113ti l\u012bmen\u012b, kas attiecas uz S\u0136D apjomu, un uz tiem tiek glab\u0101ti VM dati (t\u0101s diski, konfigur\u0101cijas fails, swap fails utt.). <\/p>\n<p>ESXi viesis redz galveno apjomu un t\u0101 replik\u0101tu k\u0101 vienu diska ier\u012bci (Storage Device). No ESXi viesa uz katru diska ier\u012bci ir 24 ce\u013ci:<\/p>\n<p>12 ce\u013ci savieno to ar lok\u0101lo S\u0136D (optim\u0101lie ce\u013ci), bet atliku\u0161ais 12 - ar att\u0101lo (neoptim\u0101lie ce\u013ci). Parast\u0101 situ\u0101cij\u0101 ESXi piek\u013c\u016bst datiem lok\u0101laj\u0101 S\u0136D, izmantojot \u201coptim\u0101los\u201d ce\u013cus. Kad \u0161\u012b S\u0136D iziet no ierindas, ESXi zaud\u0113 optim\u0101los ce\u013cus un p\u0101rsl\u0113dzas uz \u201cneoptim\u0101lajiem\u201d. \u0160\u0101di tas izskat\u0101s sh\u0113m\u0101.<\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/e2b61eb8b9db4b882a6d20c0abf9fc4e.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Katrastropu iztur\u012bga klastera sh\u0113ma.<\/i><\/p>\n<p>Visas klientu t\u012bklu l\u012bnijas ir savienotas uz ab\u0101m viet\u0101m caur kop\u0113ju t\u012bkla fabriku. Katru vietu p\u0101rvalda Provider Edge (PE), kur\u0101 tiek termin\u0113ti klienta t\u012bkli. PE ir apvienoti kop\u0113j\u0101 klaster\u012b. Ja PE iziet no ierindas vien\u0101 viet\u0101, viss satiksme tiek p\u0101rvirz\u012bta uz otro vietu. Pateicoties tam, virtu\u0101l\u0101s ma\u0161\u012bnas no vietas, kas palikusi bez PE, paliek pieejamas t\u012bkl\u0101 klientam. <\/p>\n<p>Tagad apl\u016bkosim, kas notiks ar klienta virtu\u0101laj\u0101m ma\u0161\u012bn\u0101m da\u017e\u0101du av\u0101riju gad\u012bjum\u0101. S\u0101ksim ar viegl\u0101kajiem variantiem un beigsim ar visnopietn\u0101kajiem - visas vietas av\u0101riju. Piem\u0113ra galven\u0101 vieta b\u016bs OST, bet rezerves, ar datu replik\u0101m, - NORD.<\/p>\n<h3>Kas notiek ar klienta virtu\u0101lo ma\u0161\u012bnu, ja\u2026 <\/h3>\n<p>\n<b>Aiziet no ierindas Replik\u0101cijas saite.<\/b> Replik\u0101cija starp divu vietu S\u0136D tiek p\u0101rtraukta.<br \/>\nESXi darbos tikai ar lok\u0101lajiem diska ier\u012bc\u0113m (optimiz\u0113tajos ce\u013cos). <br \/>\nVirtu\u0101l\u0101s ma\u0161\u012bnas turpina darboties.<\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/c15c34e54cb456011f3155b30cbe1063.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Notiek ISL (Inter-Switch Link) atsl\u0113g\u0161ana.<\/b> Gad\u012bjums ir maz ticams. Maksimums, k\u0101ds var\u0113tu notikt, ir, ja k\u0101ds traks ekskavators p\u0101rrakst\u012btu vair\u0101kas optisk\u0101s l\u012bnijas, kas iet pa neatkar\u012bgiem ce\u013ciem un ir pievienotas laukumiem caur da\u017e\u0101diem ievadiem. Ta\u010du tom\u0113r. \u0160aj\u0101 gad\u012bjum\u0101 ESXi hosti zaud\u0113 pusi ce\u013cu un var piek\u013c\u016bt tikai sav\u0101m lok\u0101laj\u0101m SCSI. Replikas tiek izveidotas, bet hosti t\u0101m nevar piek\u013c\u016bt. <\/p>\n<p>Virtu\u0101l\u0101s ma\u0161\u012bnas darbojas norm\u0101li.<\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/c6c1b8b4972cd90cdb639fffe623bc1d.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Izbeidzas SAN sl\u0113dzis vien\u0101 no laukumiem.<\/b> ESXi hosti zaud\u0113 da\u013cu ce\u013cu uz SCSI. \u0160aj\u0101 gad\u012bjum\u0101 hosti laukum\u0101, kur sl\u0113dzis izbeidz darbu, str\u0101d\u0101s tikai caur vienu savu HBA. <\/p>\n<p>Virtu\u0101l\u0101s ma\u0161\u012bnas \u0161aj\u0101 gad\u012bjum\u0101 turpina darboties norm\u0101li.<\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/3325765d426751e8717af20f7f122b90.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Visi SAN sl\u0113d\u017ei vien\u0101 no laukumiem ir neakt\u012bvi.<\/b> Pie\u0146emot, ka t\u0101da nelaime notikusi lauk\u0101 OST. \u0160aj\u0101 gad\u012bjum\u0101 ESXi hosti \u0161aj\u0101 lauk\u0101 zaud\u0113 visus ce\u013cus uz sav\u0101m diska ier\u012bc\u0113m. Iest\u0101jas standarta VMware vSphere HA meh\u0101nisms: vi\u0146\u0161 restart\u0113s visas virtu\u0101l\u0101s ma\u0161\u012bnas lauk\u0101 OST NORD\u2019\u0101 maksimums 140 sekun\u017eu laik\u0101. <\/p>\n<p>Virtu\u0101l\u0101s ma\u0161\u012bnas, kas darbojas uz laukuma NORD hostiem, darbojas norm\u0101li.<\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/c7a129691cd4d6c161e165fd55607206.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Izbeidzas ESXi hosti vien\u0101 lauk\u0101. <\/b>\u0160eit atkal darbojas vSphere HA meh\u0101nisms: virtu\u0101l\u0101s ma\u0161\u012bnas no neakt\u012bv\u0101 hosta tiek restart\u0113tas uz citiem hostiem \u2013 vai nu taj\u0101 pa\u0161\u0101 lauk\u0101, vai ar\u012b att\u0101lin\u0101t\u0101 lauk\u0101. Virtu\u0101l\u0101s ma\u0161\u012bnas restart\u0113\u0161anas laiks \u2013 l\u012bdz 1 min\u016btei. <\/p>\n<p>Ja visi ESXi hosti lauk\u0101 OST tiek neakt\u012bvi, \u0161aj\u0101 gad\u012bjum\u0101 nav variantu: VM tiek restart\u0113tas uz citu. Restart\u0113\u0161anas laiks ir tas pats. <\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/c00fb5078e0c4df1461187d8896670a4.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Izbeidzas SCSI vien\u0101 lauk\u0101.<\/b> Pie\u0146emot, ka SCSI izbeidz darbu lauk\u0101 OST. Tad ESXi hosti lauk\u0101 OST p\u0101riet uz darbu ar replik\u0101m SCSI NORD\u2019\u0101. P\u0113c nedarb\u012bg\u0101s SCSI atgrie\u0161an\u0101s darb\u0101 notiks sp\u0113ka replik\u0101cija, ESXi hosti OST atkal s\u0101ks piek\u013c\u016bt lok\u0101lajai SCSI. <\/p>\n<p>Virtu\u0101l\u0101s ma\u0161\u012bnas visu \u0161o laiku str\u0101d\u0101 norm\u0101li.<\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/87f7e1d012886d963f020768864154a7.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Izbeidzas viens no laukiem.<\/b> \u0160aj\u0101 gad\u012bjum\u0101 visas virtu\u0101l\u0101s ma\u0161\u012bnas tiks restart\u0113tas uz rezerves laukumu caur vSphere HA meh\u0101nismu. Virtu\u0101l\u0101s ma\u0161\u012bnas restart\u0113\u0161anas laiks ir 140 sekundes. Taj\u0101 pa\u0161\u0101 laik\u0101 visas virtu\u0101l\u0101s ma\u0161\u012bnas t\u012bkla iestat\u012bjumi tiks saglab\u0101ti, un t\u0101s paliek pieejamas klientam caur t\u012bklu.<\/p>\n<p>Lai nodro\u0161in\u0101tu, ka ma\u0161\u012bnu p\u0101rstart\u0113\u0161ana rezerves vietn\u0113 notiek bez probl\u0113m\u0101m, katra vietne ir aizpild\u012bta tikai uz pusi. Otr\u0101 puse ir rezerves variants gad\u012bjumam, ja visas virtu\u0101l\u0101s ma\u0161\u012bnas j\u0101p\u0101rvieto no otr\u0101s, cietu\u0161\u0101s vietnes.<\/p>\n<p><img decoding=\"async\" alt=\"Katrastrofu iztur\u012bgs m\u0101konis: k\u0101 tas darbojas\" src=\"\/wp-content\/uploads\/2020\/01\/62cad7aaf5043f6879dc4a6cbb7b35bb.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNo \u0161\u0101d\u0101m atteik\u0161an\u0101s situ\u0101cij\u0101m pasarg\u0101 katastrofu iztur\u012bgs m\u0101konis, kas balst\u012bts uz diviem datu centriem. <\/p>\n<p>\u0160\u012b bauda nav l\u0113ta, jo, papildus galvenajiem resursiem, ir nepiecie\u0161ama rezerve otraj\u0101 vietn\u0113. T\u0101d\u0113\u013c \u0161\u0101d\u0101 m\u0101ko\u0146\u012b tiek izvietoti biznesam kritiski pakalpojumi, kuru ilgs d\u012bkst\u0101ves periods nes lielus finansi\u0101lus un reput\u0101cijas zaud\u0113jumus, vai ja inform\u0101cijas sist\u0113mai ir pras\u012bbas attiec\u012bb\u0101 uz katastrofu iztur\u012bbu no regulatoriem vai uz\u0146\u0113muma iek\u0161\u0113jiem noteikumiem.<\/p>\n<p><b>Avoti:<\/b><\/p>\n<ol>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.infinidat.com\/sites\/default\/files\/resource-pdfs\/DS-INFBOX-190331-US_0.pdf\">www.infinidat.com\/sites\/default\/files\/resource-pdfs\/DS-INFBOX-190331-US_0.pdf<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/support.infinidat.com\/hc\/en-us\/articles\/207057109-InfiniBox-best-practices-guides\">support.infinidat.com\/hc\/en-us\/articles\/207057109-InfiniBox-best-practices-guides<\/a><\/noindex><\/li>\n<\/ol>\n<p>Avots: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/dataline\/blog\/486186\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0438\u0432\u0435\u0442, \u0425\u0430\u0431\u0440! \u041f\u043e\u0441\u043b\u0435 \u043d\u043e\u0432\u043e\u0433\u043e\u0434\u043d\u0438\u0445 \u043f\u0440\u0430\u0437\u0434\u043d\u0438\u043a\u043e\u0432 \u043c\u044b \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0443\u0441\u0442\u0438\u043b\u0438 \u043a\u0430\u0442\u0430\u0441\u0442\u0440\u043e\u0444\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0435 \u043e\u0431\u043b\u0430\u043a\u043e \u043d\u0430 \u0431\u0430\u0437\u0435 \u0434\u0432\u0443\u0445 \u043f\u043b\u043e\u0449\u0430\u0434\u043e\u043a. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0435\u043c, \u043a\u0430\u043a \u044d\u0442\u043e \u0443\u0441\u0442\u0440\u043e\u0435\u043d\u043e, \u0438 \u043f\u043e\u043a\u0430\u0436\u0435\u043c, \u0447\u0442\u043e \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442 \u0441 \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u043c\u0438 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u043c\u0438 \u043c\u0430\u0448\u0438\u043d\u0430\u043c\u0438 \u043f\u0440\u0438 \u043e\u0442\u043a\u0430\u0437\u0435 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u043e\u0432 \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0430 \u0438 \u043f\u0430\u0434\u0435\u043d\u0438\u0438 \u0446\u0435\u043b\u043e\u0439 \u043f\u043b\u043e\u0449\u0430\u0434\u043a\u0438 (\u0441\u043f\u043e\u0439\u043b\u0435\u0440 \u2013 \u0441 \u043d\u0438\u043c\u0438 \u0432\u0441\u0435 \u0445\u043e\u0440\u043e\u0448\u043e). \u0421\u0425\u0414 \u043a\u0430\u0442\u0430\u0441\u0442\u0440\u043e\u0444\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e\u0433\u043e \u043e\u0431\u043b\u0430\u043a\u0430 \u043d\u0430 \u043f\u043b\u043e\u0449\u0430\u0434\u043a\u0435 OST. \u0427\u0442\u043e \u0432\u043d\u0443\u0442\u0440\u0438 \u041f\u043e\u0434 \u043a\u0430\u043f\u043e\u0442\u043e\u043c \u0443 \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u044b Cisco [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":40139,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-40138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0438\u0432\u0435\u0442, \u0425\u0430\u0431\u0440! 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