{"id":31642,"date":"2019-10-31T21:42:19","date_gmt":"2019-10-31T18:42:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/planirovanie-infrastruktury-dlya-ustanovki-zimbra-collaboration-suite\/"},"modified":"2019-10-31T21:42:19","modified_gmt":"2019-10-31T18:42:19","slug":"planirovanie-infrastruktury-dlya-ustanovki-zimbra-collaboration-suite","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/administrirovanie\/planirovanie-infrastruktury-dlya-ustanovki-zimbra-collaboration-suite","title":{"rendered":"Planiranje infrastrukture za instalaciju Zimbra Collaboration Suite","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Implementacija svakog IT rje\u0161enja u poduze\u0107u po\u010dinje projektiranjem. U ovoj fazi IT menad\u017eer mora izra\u010dunati broj poslu\u017eitelja i njihove karakteristike kako bi s jedne strane bilo dovoljno resursa za sve korisnike, a s druge strane kako bi omjer cijene i kvalitete tih poslu\u017eitelja bio optimalan, a tro\u0161kovi izrade ra\u010dunalne infrastrukture za novi informacijski sustav ne probili ozbiljnu rupu u IT bud\u017eetu poduze\u0107a. Razjasnimo kako pravilno projektirati infrastrukturu za implementaciju Zimbra Collaboration Suite-a u poduze\u0107u.<\/p>\n

\"Planiranje<\/a><\/noindex><\/p>\n

Osnovna zna\u010dajka Zimbre u usporedbi s drugim rje\u0161enjima je ta da se kod ZCS-a rijetko odvaja procesorska snaga ili RAM kao \"usko grlo\". Glavno ograni\u010denje obi\u010dno postaje brzina ulaza i izlaza tvrdog diska te stoga treba posvetiti posebnu pa\u017enju pohranama podataka. Minimalni zahtjevi za Zimbru u proizvodnom okru\u017eenju uklju\u010duju 4-jezgreni 64-bitni procesor s brzinom od 2 gigaherca, 10 gigabajta za sistemske datoteke i logove, te najmanje 8 gigabajta RAM-a. Obi\u010dno su takve karakteristike dovoljne za brzu obradu poslu\u017eitelja. No \u0161to u\u010diniti ako trebate implementirati Zimbru za 10 tisu\u0107a korisnika? Koje poslu\u017eitelje i kako ih treba implementirati u tom slu\u010daju?<\/p>\n

Zapo\u010dnimo s tim da infrastruktura za 10 tisu\u0107a korisnika mora biti multiserverna. Multiserverna infrastruktura s jedne strane omogu\u0107uje da Zimbra bude skalabilna, dok s druge strane osigurava brzu obradu informacijskog sustava \u010dak i pri velikom broju korisnika. Obi\u010dno je prili\u010dno te\u0161ko predvidjeti koliko \u0107e korisnika poslu\u017eitelj Zimbra kvalitetno opslu\u017eiti, jer mnogo toga ovisi o intenzitetu njihove upotrebe kalendara i elektroni\u010dke po\u0161te, kao i o kori\u0161tenom protokolu. Iz tog razloga, za ovaj primjer implementirat \u0107emo 4 po\u0161tanska skladi\u0161ta. U slu\u010daju nedostatka ili ozbiljnog vi\u0161ka kapaciteta, mogu\u0107e je isklju\u010diti ili dodati jo\u0161 jedan.<\/p>\n

Dakle, prilikom projektiranja infrastrukture za 10.000 ljudi, bit \u0107e potrebno kreirati LDAP, MTA i Proxy servere te 4 po\u0161tanska spremi\u0161ta. Napomenimo da se LDAP, MTA i Proxy serveri mogu napraviti virtualnima. To \u0107e smanjiti tro\u0161kove za serversku opremu i olak\u0161ati rezerviranje i oporavak podataka, ali s druge strane, u slu\u010daju kvara fizi\u010dkog servera, riskirate da ostanete bez MTA, LDAP i Proxy. Zato treba pa\u017eljivo razmotriti izbor izme\u0111u fizi\u010dkih i virtualnih servera, ovisno o tome koliko vremena zastoja si mo\u017eete priu\u0161titi u slu\u010daju nu\u017ede. Po\u0161tanska spremi\u0161ta je najbolje smjestiti na fizi\u010dke servere, jer \u0107e se na njima odvijati najve\u0107i broj zapisnih ciklusa koji ograni\u010davaju brzinu Zimbre, a ve\u0107i broj kanala za prijenos podataka zna\u010dajno \u0107e pove\u0107ati performanse Zimbre. <\/p>\n

U na\u010delu, nakon kreiranja poslu\u017eitelja<\/a> LDAP, MTA, Proxy, mre\u017enih spremi\u0161ta i njihovog udru\u017eivanja u jedinstvenu infrastrukturu, Zimbra Collaboration Suite za 10.000 korisnika spremna je za stavljanje u rad. Shema rada takve konfiguracije bit \u0107e prili\u010dno jednostavna: <\/p>\n

\"Planiranje
\n
\nNa shemi su prikazani glavni \u010dvorovi sustava i tokovi podataka koji \u0107e kru\u017eiti izme\u0111u njih. Pri takvoj konfiguraciji infrastruktura ne\u0107e biti za\u0161ti\u0107ena od gubitka podataka, zastoja povezanog s kvarom bilo kojeg od servera itd. Pogledajmo kako se mo\u017ee za\u0161tititi vlastita infrastruktura od ovih problema.<\/p>\n

Glavna metoda je hardverska redundancija. Dodatni \u010dvorovi MTA i Proxy mogu, u slu\u010daju kvara glavnih servera, privremeno preuzeti ulogu glavnih servera. Dupliciranje \u010dvorova kriti\u010dne infrastrukture gotovo uvijek je izvrsna ideja, ali nije uvijek izvedivo u \u017eeljenom opsegu. Dobar primjer je rezervacija servera na kojima se pohranjuje po\u0161ta. Trenutno Zimbra Collaboration Suite Open-Source Edition ne podr\u017eava stvaranje dupliciranih spremi\u0161ta, pa u slu\u010daju kvara jednog od tih servera ne mo\u017ee se izbje\u0107i zastoj, a kako bi se smanjilo vrijeme zastoja uzrokovano kvarom po\u0161tanskog spremi\u0161ta, IT menad\u017eer mo\u017ee implementirati rezervnu kopiju na drugom. serveru<\/a>. <\/p>\n

Budu\u0107i da Zimbra OSE nema ugra\u0111eni sustav za izradu sigurnosnih kopija, trebat \u0107e nam Zextras Backup, koji podr\u017eava izradu sigurnosnih kopija u stvarnom vremenu, kao i vanjski skladi\u0161ni prostor. S obzirom na to da Zextras Backup, prilikom izrade punih i inkrementalnih sigurnosnih kopija, sprema sve podatke u mapu \/opt\/zimbra\/backup, bilo bi razborito montirati vanjski, mre\u017eni ili \u010dak cloud skladi\u0161ni prostor u tu mapu kako bismo u slu\u010daju pada jednog od poslu\u017eitelja imali fizi\u010dki ure\u0111aj s aktualnom sigurnosnom kopijom na dan nu\u017ede. Mo\u017ee se ponovno pokrenuti na rezervnom fizi\u010dkom poslu\u017eitelju, virtualnoj ma\u0161ini ili u oblaku. Dobra ideja bi bila i postavljanje MTA-a sa spam filtrima ispred poslu\u017eitelja s Zimbra Proxy-jem kako bi se smanjila koli\u010dina ne\u017eeljenog prometa koji dolazi na poslu\u017eitelj.<\/p>\n

Na kraju, za\u0161ti\u0107ena infrastruktura Zimbra izgledat \u0107e otprilike ovako:<\/p>\n

\"Planiranje
\n
\nS ovom konfiguracijom, infrastruktura Zimbra ne samo da \u0107e mo\u0107i pru\u017eiti kvalitetne usluge za 10.000 korisnika, ve\u0107 \u0107e tako\u0111er omogu\u0107iti brzo rje\u0161avanje posljedica u slu\u010daju hitnih situacija.
\n
Izvor: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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