{"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\/sq\/blog\/katastrofoustojchivoe-oblako-kak-eto-rabotaet","title":{"rendered":"Reagimi i katastrofave n\u00eb cloud: si funksionon","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>P\u00ebrsh\u00ebndetje, Habr! <\/p>\n<p>Pas festave t\u00eb Vitit t\u00eb Ri, rip\u00ebrt\u00ebrit\u00ebm cloud-in e q\u00ebndruesh\u00ebm ndaj katastrofave n\u00eb dy lokacione. Sot do t\u00eb tregojm\u00eb se si \u00ebsht\u00eb strukturuar kjo dhe do t\u00eb ilustrojm\u00eb se \u00e7far\u00eb ndodh me makinat virtuale t\u00eb klient\u00ebve kur ndodhin d\u00ebshtime n\u00eb disa komponente t\u00eb klasterit dhe kur nj\u00eb lokacion t\u00ebrheqhet (spoiler \u2013 ato vazhdojn\u00eb t\u00eb funksionojn\u00eb normalisht). <\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/58b56261b55785a76bce3e754c86f6a9.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Sistemi i ruajtjes s\u00eb t\u00eb dh\u00ebnave n\u00eb cloud-in e q\u00ebndruesh\u00ebm ndaj katastrofave n\u00eb lokacionin OST.<\/i><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>\u00c7far\u00eb ka brenda<\/h3>\n<p>\nN\u00ebn kapu\u00e7in e klasterit jan\u00eb server\u00ebt Cisco UCS me hipervizorin VMware ESXi, dy sisteme ruajtjeje INFINIDAT InfiniBox F2240, pajisje rrjetesh Cisco Nexus, si dhe switch-a SAN Brocade. Klasteri \u00ebsht\u00eb shp\u00ebrndar\u00eb n\u00eb dy lokacione \u2013 OST dhe NORD, q\u00eb do t\u00eb thot\u00eb se n\u00eb \u00e7do qend\u00ebr t\u00eb t\u00eb dh\u00ebnave \u00ebsht\u00eb set i nj\u00ebjt\u00eb pajisjesh. Kjo \u00ebsht\u00eb ajo q\u00eb e b\u00ebn at\u00eb t\u00eb q\u00ebndruesh\u00ebm ndaj katastrofave. <\/p>\n<p>N\u00eb kuad\u00ebr t\u00eb nj\u00eb lokacioni, elementet kryesore jan\u00eb gjithashtu t\u00eb dyfishuara (host-at, switch-at SAN, rrjetet).<br \/>\nDy lokacione jan\u00eb t\u00eb lidhura me linja optike t\u00eb dedikuara, gjithashtu t\u00eb rezervuara.<\/p>\n<p>Pak fjal\u00eb p\u00ebr sistemet e ruajtjes. Versioni i par\u00eb i cloud-it t\u00eb q\u00ebndruesh\u00ebm ndaj katastrofave e nd\u00ebrtuam n\u00eb NetApp. K\u00ebtu zgjodh\u00ebm INFINIDAT, dhe ja pse:<\/p>\n<ul>\n<li>Opsioni i replikimit Active-Active. Ky opsion lejon q\u00eb makina virtuale t\u00eb q\u00ebndroj\u00eb n\u00eb gjendje funksionimi edhe n\u00eb rastin e d\u00ebshtimit t\u00eb plot\u00eb t\u00eb nj\u00ebrit nga sistemet e ruajtjes. N\u00eb vazhdim do flas m\u00eb shum\u00eb p\u00ebr replikimin.<\/li>\n<li>Tre kontroler\u00eb disku p\u00ebr t\u00eb rritur q\u00ebndrueshm\u00ebrin\u00eb e sistemit. Zakonisht ka vet\u00ebm dy.<\/li>\n<li>Zgjidhje e gatshme. Nj\u00eb raft i mbledhur erdhi tek ne, q\u00eb vet\u00ebm duhet ta lidhim me rrjetin dhe ta konfigurojm\u00eb.<\/li>\n<li>P\u00ebrkrahje teknike e kujdesshme. Inxhinier\u00ebt e INFINIDAT analizojn\u00eb vazhdimisht log-et dhe ngjarjet e sistemit t\u00eb ruajtjes, instalojn\u00eb versionet e reja n\u00eb firmware, ndihmojn\u00eb me konfigurimin.<\/li>\n<\/ul>\n<p>\nJa disa foto nga unpacking:<\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/b953a56bba9f0308f5fe1b27b356683b.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/94b5ceb8565ebe1ef2aacff943e1a9d0.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Si funksionon<\/h3>\n<p>\nCloud-i tashm\u00eb \u00ebsht\u00eb i q\u00ebndruesh\u00ebm brenda vetes. Ai mbron klientin nga d\u00ebshtimet individuale t\u00eb pajisjeve dhe softuerit. Nd\u00ebrsa, q\u00ebndrueshm\u00ebria ndaj katastrofave ndihmon p\u00ebr t\u2019u mbrojtur nga d\u00ebshtimet masive brenda nj\u00eb lokacioni: p\u00ebr shembull, d\u00ebshtimi i sistemit t\u00eb ruajtjes (ose i klasterit SDS, q\u00eb ndodh shpesh \ud83d\ude42), gabime masive n\u00eb rrjetin e ruajtjes dhe t\u00eb tjera. Dhe gj\u00ebja kryesore: nj\u00eb cloud i till\u00eb shp\u00ebton kur nj\u00eb lokacion i t\u00ebri b\u00ebhet i paarritsh\u00ebm p\u00ebr shkak t\u00eb nj\u00eb zjarri, nj\u00eb t\u00ebrheqjeje energjie, grabitje t\u00eb dhunshme, ose nj\u00eb sulmi t\u00eb alien\u00ebve. <\/p>\n<p>N\u00eb t\u00eb gjitha k\u00ebto raste, makinat virtuale t\u00eb klient\u00ebve vazhdojn\u00eb t\u00eb funksionojn\u00eb, dhe ja pse. <\/p>\n<p>Skema e klasterit \u00ebsht\u00eb e dizajnuar n\u00eb m\u00ebnyr\u00eb q\u00eb \u00e7do host ESXi me makina virtuale t\u00eb klient\u00ebve t\u00eb mund t\u00eb aksesoj\u00eb \u00e7do sistem ruajtjeje nga dy lokacionet. N\u00ebse sistemi i ruajtjes n\u00eb lokacionin OST d\u00ebshton, at\u00ebher\u00eb makinat virtuale do t\u00eb vazhdojn\u00eb t\u00eb funksionojn\u00eb: hostet, n\u00eb t\u00eb cilat ato punojn\u00eb, do t\u00eb k\u00ebrkojn\u00eb t\u00eb dh\u00ebna nga sistemi i ruajtjes n\u00eb NORD. <\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/996193debdab5b3564c97b05b1e5ba27.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>K\u00ebshtu duket skema e lidhjes n\u00eb klaster. <\/i><\/p>\n<p>Kjo \u00ebsht\u00eb e mundur p\u00ebr shkak se midis fabrikave SAN t\u00eb dy lokacioneve \u00ebsht\u00eb p\u00ebrcaktuar Inter-Switch Link: switch-i SAN Fabric A OST \u00ebsht\u00eb lidhur me switch-in SAN Fabric A NORD, ashtu si edhe p\u00ebr switch-at SAN Fabric B. <\/p>\n<p>Dhe q\u00eb t\u00eb gjitha k\u00ebto nd\u00ebrthurrje t\u00eb fabrikave SAN t\u00eb ken\u00eb kuptim, midis dy sistemeve t\u00eb ruajtjes \u00ebsht\u00eb p\u00ebrcaktuar replikimi Active-Active: informacioni regjistrohet pothuajse nj\u00ebkoh\u00ebsisht n\u00eb sistemin e ruajtjes lokal dhe at\u00eb t\u00eb larg\u00ebt, RPO=0. Pra, n\u00eb nj\u00eb sistem ruajtjeje ruhet origjinali i t\u00eb dh\u00ebnave, nd\u00ebrsa n\u00eb tjetrin \u2013 replikimi i tyre. T\u00eb dh\u00ebnat replikohen n\u00eb nivelin e volumeve t\u00eb sistemit t\u00eb ruajtjes, dhe aty ruhen t\u00eb dh\u00ebnat e VM (disqet e saj, skedari i konfigurimit, skedari swap etj.). <\/p>\n<p>Hosti ESXi e sheh volumin kryesor dhe replikimin e tij si nj\u00eb pajisje t\u00eb vetme ruajtjeje (Storage Device). Nga hosti ESXi n\u00eb \u00e7do pajisje ruajtjeje ka 24 rrug\u00eb:<\/p>\n<p>12 rrug\u00eb lidhin at\u00eb me sistemin e ruajtjes lokal (rrug\u00ebt optimale), nd\u00ebrsa t\u00eb tjerat 12 \u2013 me at\u00eb t\u00eb larg\u00ebt (rrug\u00ebt jo optimale). N\u00eb nj\u00eb situat\u00eb normale, ESXi akseson t\u00eb dh\u00ebnat n\u00eb sistemin e ruajtjes lokal, duke p\u00ebrdorur \"rrug\u00ebt optimale\". N\u00eb rast se ky sistem d\u00ebshtoi, ESXi humbet rrug\u00ebt optimale dhe kalon n\u00eb \"rrug\u00ebt jo optimale\". K\u00ebshtu duket n\u00eb skem\u00eb.<\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/e2b61eb8b9db4b882a6d20c0abf9fc4e.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Skema e klasterit t\u00eb q\u00ebndruesh\u00ebm ndaj katastrofave.<\/i><\/p>\n<p>T\u00eb gjitha rrjetet e klient\u00ebve jan\u00eb t\u00eb lidhura me t\u00eb dy lokacionet p\u00ebrmes nj\u00eb fabrik\u00eb rrjeti t\u00eb p\u00ebrbashk\u00ebt. N\u00eb \u00e7do lokacion funksionon Provider Edge (PE), ku mbarojn\u00eb rrjetet e klient\u00ebve. PE jan\u00eb t\u00eb lidhura n\u00eb nj\u00eb klaster t\u00eb p\u00ebrbashk\u00ebt. N\u00eb rast t\u00eb d\u00ebshtimit t\u00eb PE n\u00eb nj\u00eb lokacion, e gjith\u00eb trafiku ridrejtohet n\u00eb lokacionin e dyt\u00eb. Fal\u00eb k\u00ebsaj, makinat virtuale nga lokacioni q\u00eb ka humbur PE mbeten t\u00eb aksesueshme n\u00eb rrjet p\u00ebr klientin. <\/p>\n<p>Tani le t\u00eb shikojm\u00eb se \u00e7far\u00eb do t\u00eb ndodh\u00eb me makinat virtuale t\u00eb klientit n\u00eb rastet e ndryshme t\u00eb d\u00ebshtimeve. Le t\u00eb fillojm\u00eb me variantet m\u00eb t\u00eb lehta dhe t\u00eb p\u00ebrfundojm\u00eb me d\u00ebshtimin m\u00eb serioz \u2013 d\u00ebshtimin e t\u00ebr\u00eb lokacionit. N\u00eb shembuj, lokacioni kryesor do t\u00eb jet\u00eb OST, dhe lokacioni rezerv\u00eb, me replikat e t\u00eb dh\u00ebnave, do t\u00eb jet\u00eb NORD.<\/p>\n<h3>\u00c7far\u00eb ndodh me makin\u00ebn virtuale t\u00eb klientit, n\u00ebse\u2026 <\/h3>\n<p>\n<b>D\u00ebshtimi i Replication Link.<\/b> Replikimi midis sistemeve t\u00eb ruajtjes n\u00eb t\u00eb dy lokacionet nd\u00ebrpritet.<br \/>\nESXi do t\u00eb punoj\u00eb vet\u00ebm me pajisjet e diskut lokale (p\u00ebrmes rrug\u00ebve optimale). <br \/>\nMakinat virtuale vazhdojn\u00eb t\u00eb funksionojn\u00eb.<\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/c15c34e54cb456011f3155b30cbe1063.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Ka nj\u00eb nd\u00ebrprerje ISL (Inter-Switch Link).<\/b> Nj\u00eb rast i paevendt\u00eb. Ndryshe nga ndonj\u00eb ekskavator i \u00e7mendur q\u00eb mund t\u00eb shkat\u00ebrroj\u00eb disa linja optike q\u00eb kalojn\u00eb n\u00eb rrug\u00eb t\u00eb pavarura dhe jan\u00eb t\u00eb lidhura me vendet p\u00ebrmes hyrjeve t\u00eb ndryshme. Megjithat\u00eb. N\u00eb k\u00ebt\u00eb rast, hostet ESXi humbin gjysm\u00ebn e rrug\u00ebve dhe mund t\u00eb ken\u00eb qasje vet\u00ebm n\u00eb SAN-t\u00eb e tyre lokale. Replikat krijohen, por hostet nuk mund t'i aksesojn\u00eb ato. <\/p>\n<p>Makinat virtuale punojn\u00eb normalisht.<\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/c6c1b8b4972cd90cdb639fffe623bc1d.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>D\u00ebshtimi i switch-it SAN n\u00eb nj\u00eb nga vendet.<\/b> Hostet ESXi humbin nj\u00eb pjes\u00eb t\u00eb rrug\u00ebve drejt SAN-it. N\u00eb k\u00ebt\u00eb rast, hostet n\u00eb vendin ku ka ndodhur d\u00ebshtimi i switch-it, do t\u00eb punojn\u00eb vet\u00ebm p\u00ebrmes nj\u00eb HBA t\u00eb vet. <\/p>\n<p>Makinat virtuale vazhdojn\u00eb t\u00eb punojn\u00eb normalisht.<\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/3325765d426751e8717af20f7f122b90.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>T\u00eb gjitha switch-et SAN d\u00ebshtojn\u00eb n\u00eb nj\u00eb nga vendet.<\/b> Le t\u00eb themi, ndodhi nj\u00eb e keqe n\u00eb vendin OST. N\u00eb k\u00ebt\u00eb rast, hostet ESXi n\u00eb k\u00ebt\u00eb vend do t\u00eb humbin t\u00eb gjitha rrug\u00ebt drejt pajisjeve t\u00eb tyre disk. Mekanizmi standard i VMware vSphere HA hyn n\u00eb funksion: ai do t\u00eb ri-ngrej\u00eb t\u00eb gjitha makinat virtuale n\u00eb vendin OST n\u00eb NORD brenda 140 sekondave maksimalisht. <\/p>\n<p>Makinat virtuale q\u00eb punojn\u00eb n\u00eb hostet e vendit NORD, punojn\u00eb normalisht.<\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/c7a129691cd4d6c161e165fd55607206.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Nj\u00eb host ESXi d\u00ebshtojn\u00eb n\u00eb nj\u00eb vend. <\/b>K\u00ebtu gjithashtu aktivizohet mekanizmi vSphere HA: makinat virtuale nga hosti q\u00eb ka d\u00ebshtuar ri-ngrihen n\u00eb hostet e tjera - n\u00eb t\u00eb nj\u00ebjtin apo n\u00eb nj\u00eb vend t\u00eb larg\u00ebt. Koha p\u00ebr ri-ngritjen e makines virtuale \u00ebsht\u00eb deri n\u00eb 1 minut\u00eb. <\/p>\n<p>N\u00ebse t\u00eb gjitha hostet ESXi n\u00eb vendin OST d\u00ebshtojn\u00eb, at\u00ebher\u00eb nuk ka mund\u00ebsi tjet\u00ebr: VM-t\u00eb ri-ngrihen n\u00eb nj\u00eb tjet\u00ebr. Koha e ri-ngritjes \u00ebsht\u00eb e nj\u00ebjt\u00eb. <\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/c00fb5078e0c4df1461187d8896670a4.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>D\u00ebshtimi i SAN-it n\u00eb nj\u00eb vend.<\/b> Le t\u00eb themi, d\u00ebshtoi SAN-i n\u00eb vendin OST. N\u00eb k\u00ebt\u00eb rast, hostet ESXi t\u00eb vendit OST kalojn\u00eb n\u00eb pun\u00ebn me replikat e SAN-it n\u00eb NORD. Pas p\u00ebrmir\u00ebsimit t\u00eb SAN-it t\u00eb d\u00ebshtuar do t\u00eb ndodh\u00eb nj\u00eb replikim i detyruar, dhe hostet ESXi OST do t\u00eb fillojn\u00eb p\u00ebrs\u00ebri t\u00eb ken\u00eb qasje n\u00eb SAN-in lokal. <\/p>\n<p>Makinat virtuale gjat\u00eb gjith\u00eb k\u00ebsaj kohe punojn\u00eb normalisht.<\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/87f7e1d012886d963f020768864154a7.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Nj\u00eb nga vendet d\u00ebshtojn\u00eb.<\/b> N\u00eb k\u00ebt\u00eb rast, t\u00eb gjitha makinat virtuale do t\u00eb ri-ngrihen n\u00eb vendin rezerv\u00eb p\u00ebrmes mekanizmit vSphere HA. Koha e ri-ngritjes s\u00eb VM \u00ebsht\u00eb 140 sekonda. Gjat\u00eb k\u00ebsaj, t\u00eb gjitha cil\u00ebsimet rrjetore t\u00eb makin\u00ebs virtuale do t\u00eb ruhen, dhe ajo do t\u00eb mbetet e qasshme p\u00ebr klientin p\u00ebrmes rrjetit.<\/p>\n<p>P\u00ebr t\u00eb siguruar q\u00eb ri-ngritja e makinave n\u00eb vendin rezerv\u00eb t\u00eb kaloj\u00eb pa probleme, \u00e7do vend \u00ebsht\u00eb i mbushur vet\u00ebm gjysm\u00eb. Gjysma tjet\u00ebr \u00ebsht\u00eb rezerv\u00eb p\u00ebr rastin e kalimit t\u00eb t\u00eb gjitha makinave virtuale nga vendi t\u00eb dyt\u00eb, i d\u00ebmtuar.<\/p>\n<p><img decoding=\"async\" alt=\"Reagimi i katastrofave n\u00eb cloud: si funksionon\" src=\"\/wp-content\/uploads\/2020\/01\/62cad7aaf5043f6879dc4a6cbb7b35bb.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPik\u00ebrisht nga k\u00ebto d\u00ebshtime e mbron Cloud-i i q\u00ebndruesh\u00ebm ndaj katastrofave n\u00eb baz\u00eb t\u00eb dy qendrave t\u00eb t\u00eb dh\u00ebnave. <\/p>\n<p>Kjo \u00ebsht\u00eb nj\u00eb k\u00ebnaq\u00ebsi e kushtueshme, pasi p\u00ebrve\u00e7 burimeve kryesore, k\u00ebrkohet nj\u00eb rezerv\u00eb n\u00eb vendin e dyt\u00eb. Prandaj, kjo lloj cloud-i vendoset p\u00ebr sh\u00ebrbime kritike p\u00ebr biznesin, ku ndalimi i gjat\u00eb sjell humbje t\u00eb m\u00ebdha financiare dhe reputacionale, ose kur sistemi informativ ka k\u00ebrkesa p\u00ebr q\u00ebndrueshm\u00ebri ndaj katastrofave nga rregullator\u00ebt ose rregulloret e brendshme t\u00eb kompanis\u00eb.<\/p>\n<p><b>Burimet:<\/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>Burimi: <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! 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