Sawubona Habr!
Ngemuva kwamaholide onyaka omusha, sethule kabusha ifu elivikela inhlekelele elisuselwe kumasayithi amabili. Namuhla sizokutshela ukuthi isebenza kanjani futhi sibonise ukuthi kwenzekani emshinini we-virtual weklayenti lapho izici ngazinye zeqoqo zihluleka futhi yonke isayithi iphahlazeka (i-spoiler - konke kuhamba kahle nabo).
Isistimu yesitoreji samafu evikela izinhlekelele kusayithi le-OST.
Yini ngaphakathi
Ngaphansi kwe-hood, iqoqo linamaseva e-Cisco UCS ane-VMware ESXi hypervisor, izinhlelo ezimbili zokugcina ze-INFINIDAT InfiniBox F2240, okokusebenza kwenethiwekhi ye-Cisco Nexus, kanye namaswishi e-Brocade SAN. Iqoqo lihlukaniswe izizinda ezimbili - i-OST ne-NORD, okungukuthi isikhungo sedatha ngasinye sinesethi efanayo yezinto zokusebenza. Empeleni, lokhu yikho okwenza kube yizinhlekelele.
Ngaphakathi kwesayithi elilodwa, izinto eziyinhloko nazo ziyimpinda (ababungazi, amaswishi e-SAN, inethiwekhi).
Lezi zingosi zombili zixhunywe imizila ye-fiber optic ezinikele, nayo igodliwe.
Amagama ambalwa mayelana nezinhlelo zokugcina. Sakhe inguqulo yokuqala yefu elivikela inhlekelele ku-NetApp. Lapha sikhethe i-INFINIDAT, futhi yingakho:
- Inketho yokuphindaphinda esebenzayo. Ivumela umshini we-virtual ukuthi uhlale usebenza ngisho noma eyodwa yesistimu yokugcina yehluleka ngokuphelele. Ngizokutshela kabanzi mayelana nokuphindaphinda kamuva.
- Izilawuli ezintathu zamadiski zokwandisa ukubekezelela iphutha lesistimu. Ngokuvamile kukhona ezimbili.
- Isixazululo esilungile. Sithole i-rack ehlanganiswe ngaphambilini edinga nje ukuxhumeka kunethiwekhi futhi ilungiselelwe.
- Ukwesekwa kwezobuchwepheshe okunakekile. Onjiniyela be-INFINIDAT bahlala behlaziya amalogi nemicimbi yesistimu yesitoreji, bafake izinguqulo ezintsha ze-firmware, futhi basize ngokulungiselela.
Nazi ezinye izithombe kusuka ekukhipheni:
Isebenza kanjani
Ifu selivele liyawabekezelela amaphutha ngaphakathi kwalo. Ivikela iklayenti ekuhlulekeni kwehadiwe eyodwa kanye nesofthiwe. Ukumelana nezinhlekelele kuzosiza ukuvikela ekuhlulekeni okukhulu ngaphakathi kwesayithi elilodwa: isibonelo, ukwehluleka kwesistimu yokugcina (noma iqoqo le-SDS, okwenzeka kaningi 🙂), amaphutha amakhulu kunethiwekhi yesitoreji, njll. Yebo, futhi okubaluleke kakhulu: ifu elinjalo lilondoloza lapho isayithi lonke lingafinyeleleki ngenxa yomlilo, ukucima, ukuthathwa kwe-raider, noma ukuhlala ngaphandle.
Kuzo zonke lezi zimo, imishini ebonakalayo yeklayenti iyaqhubeka nokusebenza, yingakho.
Idizayini yeqoqo yakhelwe ngendlela yokuthi noma yimuphi umsingathi we-ESXi onemishini ebonakalayo yeklayenti akwazi ukufinyelela noma yiziphi izinhlelo zokugcina ezimbili. Uma isistimu yesitoreji kusayithi ye-OST ihluleka, imishini ebonakalayo izoqhubeka nokusebenza: ababungazi esebenza kubo bazofinyelela isistimu yokugcina ku-NORD ukuze uthole idatha.
Yile ndlela umdwebo wokuxhumeka ku-cluster ubukeka ngayo.
Lokhu kungenzeka ngenxa yokuthi Isixhumanisi se-Inter-Switch simisiwe phakathi kwezindwangu ze-SAN zalezi zindawo ezimbili: inkinobho ye-Fabric A OST SAN ixhunywe kuswishi ye-Fabric A NORD SAN, futhi ngokufanayo namaswishi e-Fabric B SAN.
Nokho, ukuze zonke lezi zinkimbinkimbi zamafekthri e-SAN zibe nomqondo, Ukuphindaphinda Okusebenzayo kumiswa phakathi kwezinhlelo ezimbili zokugcina: ulwazi cishe lubhalwa ngasikhathi sinye kumasistimu okulondoloza asendaweni nakude, i-RPO = 0. Kuvela ukuthi idatha yasekuqaleni igcinwa ohlelweni olulodwa lwesitoreji, futhi i-replica yayo igcinwa kwenye. Idatha iphindwaphindwa ezingeni lamavolumu okugcina, futhi idatha ye-VM (amadiski ayo, ifayela lokumisa, ifayela lokushintshwa, njll.) igcinwa kuwo.
Umsingathi we-ESXi ubona ivolumu eyinhloko kanye nesifaniso sayo njengedivayisi yediski eyodwa (Idivayisi Yesitoreji). Kunezindlela ezingama-24 ukusuka kumsingathi we-ESXi kuya kudivayisi yediski ngayinye:
Izindlela eziyi-12 ziyixhuma ohlelweni lwendawo lokugcina (izindlela ezifanele), kanye ne-12 esele ohlelweni lwesitoreji esikude (izindlela ezingezona ezifanele). Esimeni esijwayelekile, i-ESXi ifinyelela idatha ohlelweni lwendawo yokugcina isebenzisa izindlela “ezilungile”. Uma le sistimu yokugcina ihluleka, i-ESXi ilahlekelwa izindlela ezifanele futhi ishintshela kwethi “ezingezona ezifanele”. Yilokhu okubukeka kumdwebo.
Uhlelo lweqoqo lokuvikela inhlekelele.
Wonke amanethiwekhi amaklayenti axhunywe kuzo zombili izingosi ngendwangu yenethiwekhi evamile. Isayithi ngalinye lisebenzisa i-Provider Edge (PE), lapho amanethiwekhi eklayenti anqanyulwa khona. Ama-PE ahlanganiswe abe yiqoqo elivamile. Uma i-PE ihluleka endaweni eyodwa, yonke ithrafikhi iqondiswa kabusha kusayithi lesibili. Ngenxa yalokhu, imishini ebonakalayo evela kusayithi eshiywe ngaphandle kwe-PE ihlala ifinyeleleka kunethiwekhi kuklayenti.
Manje ake sibone ukuthi kuzokwenzekani ngemishini ebonakalayo yeklayenti phakathi nokwehluleka okuhlukahlukene. Ake siqale ngezinketho ezilula kakhulu futhi sigcine ngokubi kakhulu - ukwehluleka kwesayithi lonke. Ezibonelweni, inkundla eyinhloko izoba i-OST, futhi iplathifomu yokusekelayo, ene-replicas yedatha, izoba yi-NORD.
Kwenzekani emshinini we-virtual weklayenti uma...
Isixhumanisi sokuphindaphinda siyehluleka. Ukuphindaphinda phakathi kwamasistimu okugcina amasayithi amabili kuyama.
I-ESXi izosebenza kuphela ngamadivayisi asendaweni ediski (ngezindlela ezifanele).
Imishini ebonakalayo iyaqhubeka nokusebenza.
I-ISL (Inter-Switch Link) iyaphuka. Icala alinakwenzeka. Ngaphandle kwalapho i-excavator ehlanyayo imba imizila embalwa yokubona ngesikhathi esisodwa, ehamba emizileni ezimele futhi ilethwa kumasayithi ngokufaka okuhlukile. Kodwa noma kunjalo. Kulokhu, ababungazi be-ESXi balahlekelwa uhhafu wezindlela futhi bangafinyelela kuphela izinhlelo zabo zokugcina zendawo. Izifaniso ziyaqoqwa, kodwa ababungazi ngeke bakwazi ukufinyelela kuzo.
Imishini ebonakalayo isebenza ngokujwayelekile.
Iswishi ye-SAN ihluleka kwenye yamasayithi. Ababungazi be-ESXi balahlekelwa ezinye zezindlela eziya ohlelweni lwesitoreji. Kulesi simo, abasingathi kusayithi lapho ukushintsha kwehlulekile bazosebenza kuphela nge-HBA yabo eyodwa.
Imishini ebonakalayo iyaqhubeka nokusebenza ngokujwayelekile.
Wonke amaswishi e-SAN kwenye yamasayithi ayahluleka. Ake sithi inhlekelele enjalo yenzeke esizeni se-OST. Kulokhu, abasingathi be-ESXi kule sayithi bazolahlekelwa yizo zonke izindlela eziya kumadivayisi wabo wediski. Indlela evamile ye-VMware vSphere HA iyaqala ukusebenza: izoqala kabusha yonke imishini ebonakalayo yesayithi le-OST e-NORD esikhathini esiphezulu samasekhondi angu-140.
Imishini ebonakalayo esebenza kubasingathi besayithi be-NORD isebenza ngokujwayelekile.
Umsingathi we-ESXi wehluleka endaweni eyodwa. Lapha indlela ye-vSphere HA isebenza futhi: imishini ebonakalayo evela kumsingathi ohlulekile iqalwa kabusha kwabanye ababungazi - kusayithi elifanayo noma elikude. Isikhathi sokuqala kabusha komshini singafika kuminithi elingu-1.
Uma bonke abasingathi be-ESXi kusayithi le-OST behluleka, azikho izinketho: ama-VM aqalwa kabusha kwenye. Isikhathi sokuqala kabusha siyefana.
Isistimu yokugcina ihluleka endaweni eyodwa. Ake sithi isistimu yokugcina ihluleka kusayithi le-OST. Bese abasingathi be-ESXi besayithi le-OST bashintshela ekusebenzeni nezifanekiselo zesitoreji e-NORD. Ngemva kokuthi uhlelo lokulondoloza oluhlulekile lubuyela kusevisi, ukuphindaphinda okuphoqelelwe kuzokwenzeka futhi abasingathi be-ESXi OST bazoqala futhi ukufinyelela kusistimu yokugcina indawo.
Imishini ebonakalayo ibisebenza ngokujwayelekile sonke lesi sikhathi.
Enye yamasayithi ayiphumelelanga. Kulokhu, yonke imishini ebonakalayo izoqalwa kabusha esizeni sokulondoloza ngomshini we-vSphere HA. Isikhathi sokuqalisa kabusha i-VM amasekhondi angu-140. Kulokhu, zonke izilungiselelo zenethiwekhi zomshini we-virtual zizogcinwa, futhi iklayenti lihlala lifinyeleleka kunethiwekhi.
Ukuqinisekisa ukuthi ukuqalisa kabusha kwemishini esizeni sokusekelayo kuhamba kahle, isayithi ngalinye ligcwele ingxenye kuphela. Ingxenye yesibili iyinqolobane uma yonke imishini ebonakalayo isuka endaweni yesibili, eyonakele.
Ifu elimelana nezinhlekelele elisekelwe ezikhungweni zedatha ezimbili livikela ekuhlulekeni okunjalo.
Le njabulo ayishibhile, ngoba, ngaphezu kwezinsiza eziyinhloko, indawo yokugcina iyadingeka esizeni sesibili. Ngakho-ke, izinsizakalo ezibucayi zebhizinisi zibekwe kulelo fu, isikhathi eside esidala ukulahlekelwa okukhulu kwezezimali nesithunzi, noma uma isistimu yolwazi ingaphansi kwezidingo zokumelana nezinhlekelele ezivela kubalawuli noma imithetho yenkampani yangaphakathi.
Imithombo:
Source: www.habr.com