{"id":75891,"date":"2020-03-29T01:43:45","date_gmt":"2020-03-28T23:43:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/vernite-mne-moj-monolit"},"modified":"2020-03-29T01:43:45","modified_gmt":"2020-03-28T23:43:45","slug":"vernite-mne-moj-monolit","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/vernite-mne-moj-monolit","title":{"rendered":"Vrni mi moj monolit","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Zdi se, da je vrhunec zanimanja za mikrostoritve mimo. \u017de ne beremo ve\u010d objav 'Kako sem svoj monolit preselil v 150 storitev' ve\u010dkrat na teden. Zdaj pogosteje sli\u0161im razumne misli: 'Ne sovra\u017eim monolita, preprosto mi je mar za u\u010dinkovitost.' Predvsem smo opazili nekaj migracij iz mikrostoritev nazaj k monolitu.<\/a><\/noindex>Ko prehajate iz enega velikega aplikacije na ve\u010d manj\u0161ih storitev, se boste morali spopasti z ve\u010d novimi problemi. Na\u0161tejmo jih \u010dim bolj na kratko.
\n<\/a><\/noindex><\/p>\n

Namestitev: od osnovne kemije do kvantne mehanike<\/h1>\n

\nNastavitev osnovne baze podatkov in aplikacije s procesom v ozadju je bila precej jasen proces. Objavim readme na Githubu \u2013 in pogosto v eni uri, najve\u010d v dveh, vse deluje in za\u010dnem nov projekt. Dodajanje in zagon kode, vsaj v za\u010detnem okolju, poteka na prvi dan. Ampak, \u010de se podamo v mikrostoritve, se \u010das za\u010detnega zagona eksponentno pove\u010da. Da, zdaj imamo Docker z orkestracijo in klaster K8, vendar je vse to za za\u010detnega programerja precej zapleteno. Za mnoge junijore je to breme, ki je resni\u010dno odve\u010dna kompleksnost.<\/p>\n

Sistem ni enostavno razumeti.<\/h1>\n

\nMalo se ustavimo pri na\u0161em junijoru. Pri monolitnih aplikacijah je bilo v primeru napake enostavno slediti in takoj preiti na odpravljanje napak. Zdaj imamo storitev, ki komunicira z drugo storitvijo, ki postavi nekaj v vrsto na sporo\u010dilni vod, ki obdeluje drugo storitev \u2013 in tukaj nastane napaka. Vse te dele moramo sestaviti skupaj, da na koncu ugotovimo, da storitev A deluje v razli\u010dici 11, medtem ko storitev E \u017ee \u010daka na razli\u010dico 12. To se mo\u010dno razlikuje od mojega standardnega konsolidiranega dnevnika: treba je uporabiti interaktivni terminal\/debbuger, da gremo skozi proces korak za korakom. Odpravljanje napak in razumevanje sta po esencialnosti postala te\u017eja.<\/p>\n

\u010ce ne moremo odpraviti napak, jih bomo morda testirali.<\/h1>\n

\nNeprekinjena integracija i neprekinjena razvojna praksa postaju sve uobi\u010dajenije. Ve\u0107ina novih aplikacija koje vidim automatski generi\u0161e i pokre\u0107e testove sa svakim novim izdanjem i zahtevaju da se testovi pro\u0111u i pregledaju pre nego \u0161to se registruju. To su odli\u010dni procesi od kojih ne treba odustati, predstavljaju veliki pomak za mnoge kompanije. No, sada, da bi stvarno proverio uslugu, moram da pokrenem punu radnu verziju svoje aplikacije. Se\u0107ate li se onog novog in\u017eenjera sa K8 klasterom od 150 usluga? Pa, sada \u0107emo pou\u010diti na\u0161 CI sistem kako da podigne sve te sisteme da bismo proverili da li sve zaista funkcioni\u0161e. Verovatno je to previ\u0161e napora, pa \u0107emo jednostavno izolovano testirati svaku komponentu: siguran sam da su na\u0161e specifikacije dovoljno dobre, API su \u010disti, a usluga koja ne radi je izolovana i ne\u0107e uticati na ostale.<\/p>\n

Svaki kompromis ima svoje opravdanje. Zar ne?<\/h1>\n

\nPostoji mnogo razloga za prelazak na mikroservise. Video sam da se to radi radi ve\u0107e fleksibilnosti, za skaliranje timova, zbog performansi i da se obezbedi bolja otpornosti. Ali u stvarnosti, ulo\u017eili smo decenije u alate i prakse razvoja monolita koje se i dalje razvijaju. Radim sa profesionalcima u raznim tehnologijama. Obi\u010dno govorimo o skaliranju, jer se suo\u010davaju sa ograni\u010denjima jednog \u010dvora baze podataka Postgres. Ve\u0107ina razgovora je o skaliranju BDM-a<\/a><\/noindex>.<\/p>\n

Ali uvek me zanima da saznam o njihovoj arhitekturi. U kojoj fazi su prelaska na mikroservise. Zanimljivo je posmatrati kako sve vi\u0161e in\u017eenjera ka\u017ee da su zadovoljni svojim monolitnim aplikacijama. Mnogim mikroservisi \u0107e doneti koristi, a dobit \u0107e nadvladati prepreke na putu migracije. No, li\u010dno, molim vas, dajte mi moj monolitni ure\u0111aj, mesto na pla\u017ei - i potpuno sam sre\u0107an.
\n
Izvor: habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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