{"id":56260,"date":"2020-02-08T00:00:00","date_gmt":"2020-02-07T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/slyorm-sre-sploshnoj-eksperiment-c-ekspertami-iz-booking-com-i-google-com"},"modified":"2020-02-18T14:04:30","modified_gmt":"2020-02-18T11:04:30","slug":"slyorm-sre-sploshnoj-eksperiment-c-ekspertami-iz-booking-com-i-google-com","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/slyorm-sre-sploshnoj-eksperiment-c-ekspertami-iz-booking-com-i-google-com","title":{"rendered":"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Na\u0161a ekipa rada eksperimentira. Svaki SLRM nije stati\u010dko ponavljanje prethodnog, ve\u0107 promi\u0161ljanje iskustva i prelazak od dobrog ka boljem. No sa <noindex><a rel=\"nofollow\" href=\"https:\/\/slurm.io\/sre\">SLRM-om SRE<\/a><\/noindex> odlu\u010dili smo primeniti potpuno novi format \u2014 pru\u017eiti u\u010desnicima uslove \u0161to bli\u017ee \"borbenim\". <\/p>\n<p><\/p>\n<p>Ako bih ukratko opisao \u010dime smo se bavili tokom intenziva: \"Gradimo, uni\u0161tavamo, popravljamo,<br \/>\nistra\u017eujemo.\" SRE malo vredi u goloj teoreiji \u2014 samo praksa, stvarna re\u0161enja, stvarni problemi. <\/p>\n<p><\/p>\n<p>U\u010desnici su podeljeni u timove kako bi \u017eivahni takmi\u010darski duh spre\u010dio svakoga da zaspi ili pokrene \"Angry Birds\" na iPhone-u kao Dmitrij Anatoljevi\u010d. <\/p>\n<p><\/p>\n<p>Problemi, gre\u0161ke, bagovi i zadaci obezbe\u0111ivali su u\u010desnicima \u010detiri mentora. Ivan Kruglov, Principal Developer u Booking.com (Nizozemska). Ben Tyler, Principal Developer u Booking.com (Sjedinjene Ameri\u010dke Dr\u017eave). Eduard Medvedev, CTO u Tungsten Labs (Nema\u010dka). Evgenij Varavva, vi\u0161estruki programer u Google-u (San Francisko).<\/p>\n<p><\/p>\n<p>A u\u010desnici su podeljeni u timove \u2014 i takmi\u010de se jedni protiv drugih. Zanimljivo? <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/ebfaccd92a805f1dff89a20938e5dece.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Ivan, Ben, Eduard i Evgenij s dobrim LENIN-ovim znakom gledaju jadne u\u010desnike SLRM SRE pre po\u010detka takmi\u010denja.<\/em><\/p>\n<p><\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex>Dakle, zadatak: <\/p>\n<p><\/p>\n<p><strong>Mi bomo, mi bomo zgradili nov svet\u2026<\/strong><\/p>\n<p><\/p>\n<p>Postoji sajt-aggregator karata za bioskop. Incidente smi\u0161ljaju mentori prema unapred pripremljenom scenariju (iako niko ne isklju\u010duje posebno sofisticiranu i podlu improvizaciju), funkcionalnost sajta opisuje se raznim metrikama. Problemi mogu biti raznoliki: karte za pozori\u0161te \"Moulin Rouge\" se ne u\u010ditavaju u bazu; posteri filmova i predstava u\u010ditavaju se u bazu du\u017ee od 10 sekundi; opis pojedinog filma se zamrzava; 0,1% narud\u017ebina dolazi ve\u0107 na rezervisana mesta; povremeno se sistem za obradu pla\u0107anja isklju\u010di na minut-dva. I mnogo, mnogo, mnogo neprijatnosti koje mogu zadesiti u\u010desnika SLRM SRE na njegovom stvarnom poslu. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/65b1acafbfa8a39fec6dfc40c16d594e.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Spremni smo da se nosimo sa svim\u2026 i sa svima.<\/em><\/p>\n<p><\/p>\n<p>Na\u0161a te\u0161ko pogo\u0111ena stranica sastoji se od nekoliko mikrosluzbi. Njen zadatak je agregacija podataka o projekcijama, cenama i slobodnim mestima iz svih bioskopa; prikazuje najave filmova, omogu\u0107ava izbor bioskopa, projekcije, sale i mesta, kao i rezervaciju i pla\u0107anje karata. Sve ono o \u010demu gledaoci mogu samo da sanjaju. Samo \u0161to korisnik ni ne sluti kakva titanska borba za stabilnost i dostupnost stranice se vodi unutra. <\/p>\n<p><\/p>\n<p>Za stranicu na intenzivu formirali smo indikatore SLO, SLI, SLA, razvili arhitekturu i infrastrukturu, implementirali stranicu, postavili monitoring i alerte. I krenulo je. <\/p>\n<p>\n<b class=\"spoiler_title\">SLO, SLI, SLA<\/b><\/p>\n<blockquote><p>SLI \u2014 indikatori nivoa usluge. SLO \u2014 ciljevi nivoa usluge. SLA \u2014 ugovori o nivou usluge. <\/p>\n<p>SLA \u2014 termin iz ITIL metodologije, koji ozna\u010dava formalni ugovor izme\u0111u korisnika usluge i njenog pru\u017eaoca, koji sadr\u017ei opis usluge, prava i obaveze strana, i, \u0161to je najva\u017enije, dogovoreni nivo kvaliteta pru\u017eanja te usluge.<\/p>\n<p>SLO je cilj nivoa usluge: ciljana vrednost ili opseg vrednosti za nivo usluge, koji se meri SLI-om. Normalna vrednost za SLO je \"SLI \u2264 ciljana vrednost\" ili \"donja granica \u2264 SLI \u2264 gornja granica\". <\/p>\n<p>SLI je indikator nivoa usluge \u2014 pa\u017eljivo definisana kvantitativna mera jednog od aspekata pru\u017eenog nivoa usluge. Za ve\u0107inu usluga, klju\u010dni SLI je latencija zahteva \u2014 koliko vremena je potrebno da se vrati odgovor na zahtev. Druge ra\u0161irene SLI uklju\u010duju stopu gre\u0161aka, \u010desto izra\u017eenu kao udeo svih primljenih zahteva, i propusnost sistema, obi\u010dno merenu u zahtevima po sekundi.<\/p><\/blockquote>\n<p><\/p>\n<p><strong>Prvo bomo razbili letala, dekleta pa, dekleta potem\u2026<\/strong><\/p>\n<p><\/p>\n<p>Unutra\u0161nji i spolja\u0161nji faktori su od prvih minuta po\u010deli da 'kvare' SLO. Na administratore su se sru\u010dile sve \u2014 i gre\u0161ke programera, i kvarovi infrastrukture, i nagli porast posetilaca, i DDoS napadi. Sve ono \u0161to pogor\u0161ava SLO. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/b40305470369f0a40692214fa9f68f2c.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\"- Dragi u\u010desnici, \u017eurim vas obradovati, prvo vam pada\u2026 sve!\"<\/em><\/p>\n<p><\/p>\n<p>Tokom doga\u0111aja predava\u010di su obradili otpornost, bud\u017eet gre\u0161aka, praksu testiranja, upravljanje prekidima i operativnim optere\u0107enjem.<\/p>\n<p><\/p>\n<p><strong>Nismo dimni\u010darji, nismo mizarji\u2026<\/strong><\/p>\n<p><\/p>\n<p>Tuk so udele\u017eenci za\u010deli popravljati - pomembno je razumeti, kaj je treba najprej narediti. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/c55d8d81dd6c945e399c82e23708fc62.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u00ab- Gospod, nikoli nisem videl, da bi se to pokvarilo tako, v tak\u0161ni obliki in v takem polo\u017eaju!\u00bb<\/em><\/p>\n<p><\/p>\n<p>Torej, pri\u0161lo je do nesre\u010de. Pla\u010dilna storitev je padla. Kako ravnati, da hitro obnovimo delovanje?<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/821795a5de152b7500c1b8a7bf08321d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Strokovnjaki z ljubeznijo opazujejo udele\u017eence, ko pripravljajo naslednjo past.<\/em><\/p>\n<p><\/p>\n<p>Vsaka ekipa organizira delo skupine za odpravo nesre\u010de - vklju\u010duje sodelavce, obve\u0161\u010da zainteresirane strani (stakeholders). Tako tudi postavljajo prioritete. Tako so se udele\u017eenci u\u010dili delati pod pritiskom v izjemno omejenem \u010dasu.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/db5502dcf79f693895027d7185f37e79.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u00ab- Kaj za vraga se je zgodilo?!\u00bb<\/em><\/p>\n<p><\/p>\n<p><strong>Zavzdihnili so... in kon\u010dali vajo.<\/strong><\/p>\n<p><\/p>\n<p>Skupaj s predavatelji po vsakem re\u0161enem problemu in za\u010dasno stabilizirani spletni strani so ekipe preu\u010devale incidente z vidika SRE. Podrobno so analizirali te\u017eave - vzroke nastanka, pot odprave. Po tem so tako ekipno kot kolektivno sprejeli odlo\u010ditve o njihovem nadaljnjem prepre\u010devanju: kako izbolj\u0161ati spremljanje, kako ustrezno spremeniti arhitekturo, kako prilagoditi pristop k razvoju in delovanju, kako popraviti regulative. Predavatelji so pokazali prakso izvajanja post-mortem. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/0574ff085c8d9c73c6ea84b52735cac1.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u00ab- Kdo si \u0161e \u017eeli muka! - Jaz!\u00bb<\/em><\/p>\n<p><\/p>\n<p>Na elektronskem tablo so strogo in jasno bele\u017eili uspehe ekip. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/033f5c167a26252b223d9ce172ced901.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Za prva mesta - nagrada od zainteresiranih strani.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Slerm SRE. Neprekinjen eksperiment s strokovnjaki iz Booking.com in Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/9f0e0272bcbfc4f93ea4d83a520eed37.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/487110\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0430\u0448\u0430 \u043a\u043e\u043c\u0430\u043d\u0434\u0430 \u043b\u044e\u0431\u0438\u0442 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u044b. \u041a\u0430\u0436\u0434\u044b\u0439 \u0421\u043b\u0451\u0440\u043c \u2014 \u044d\u0442\u043e \u043d\u0435 \u0441\u0442\u0430\u0442\u0438\u0447\u043d\u043e\u0435 \u043f\u043e\u0432\u0442\u043e\u0440\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0445, \u0430 \u043e\u0441\u043c\u044b\u0441\u043b\u0435\u043d\u0438\u0435 \u043e\u043f\u044b\u0442\u0430 \u0438 \u043f\u0435\u0440\u0435\u0445\u043e\u0434 \u043e\u0442 \u0445\u043e\u0440\u043e\u0448\u0435\u0433\u043e \u043a \u043b\u0443\u0447\u0448\u0435\u043c\u0443. \u041d\u043e \u0441\u043e \u0421\u043b\u0451\u0440\u043c\u043e\u043c SRE \u043c\u044b \u0440\u0435\u0448\u0438\u043b\u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u0438\u0442\u044c \u0430\u0431\u0441\u043e\u043b\u044e\u0442\u043d\u043e \u043d\u043e\u0432\u044b\u0439 \u0444\u043e\u0440\u043c\u0430\u0442 \u2014 \u0434\u0430\u0442\u044c \u0443\u0447\u0430\u0441\u0442\u043d\u0438\u043a\u0430\u043c \u0443\u0441\u043b\u043e\u0432\u0438\u044f, \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e \u043f\u0440\u0438\u0431\u043b\u0438\u0436\u0451\u043d\u043d\u044b\u0435 \u043a \u00ab\u0431\u043e\u0435\u0432\u044b\u043c\u00bb. \u0415\u0441\u043b\u0438 \u043a\u0440\u0430\u0442\u043a\u043e \u043e\u0431\u0440\u0438\u0441\u043e\u0432\u0430\u0442\u044c, \u0447\u0435\u043c \u043c\u044b \u0437\u0430\u043d\u0438\u043c\u0430\u043b\u0438\u0441\u044c \u043d\u0430 \u0438\u043d\u0442\u0435\u043d\u0441\u0438\u0432\u0435: \u00ab\u0421\u0442\u0440\u043e\u0438\u043c, \u043b\u043e\u043c\u0430\u0435\u043c, \u0447\u0438\u043d\u0438\u043c, \u0438\u0437\u0443\u0447\u0430\u0435\u043c\u00bb. SRE \u043c\u0430\u043b\u043e \u0447\u0435\u0433\u043e \u0441\u0442\u043e\u0438\u0442 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-56260","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0430\u0448\u0430 \u043a\u043e\u043c\u0430\u043d\u0434\u0430 \u043b\u044e\u0431\u0438\u0442 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u044b. \u041a\u0430\u0436\u0434\u044b\u0439 \u0421\u043b\u0451\u0440\u043c \u2014 \u044d\u0442\u043e \u043d\u0435 \u0441\u0442\u0430\u0442\u0438\u0447\u043d\u043e\u0435 \u043f\u043e\u0432\u0442\u043e\u0440\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0445, \u0430 \u043e\u0441\u043c\u044b\u0441\u043b\u0435\u043d\u0438\u0435 \u043e\u043f\u044b\u0442\u0430 \u0438 \u043f\u0435\u0440\u0435\u0445\u043e\u0434 \u043e\u0442 \u0445\u043e\u0440\u043e\u0448\u0435\u0433\u043e \u043a \u043b\u0443\u0447\u0448\u0435\u043c\u0443.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/slyorm-sre-sploshnoj-eksperiment-c-ekspertami-iz-booking-com-i-google-com\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.5\" \/>\n\t\t<meta property=\"og:locale\" content=\"sl_SI\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0421\u043b\u0451\u0440\u043c SRE. \u0421\u043f\u043b\u043e\u0448\u043d\u043e\u0439 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442 c \u044d\u043a\u0441\u043f\u0435\u0440\u0442\u0430\u043c\u0438 \u0438\u0437 Booking.com \u0438 Google.com | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041d\u0430\u0448\u0430 \u043a\u043e\u043c\u0430\u043d\u0434\u0430 \u043b\u044e\u0431\u0438\u0442 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u044b. \u041a\u0430\u0436\u0434\u044b\u0439 \u0421\u043b\u0451\u0440\u043c \u2014 \u044d\u0442\u043e \u043d\u0435 \u0441\u0442\u0430\u0442\u0438\u0447\u043d\u043e\u0435 \u043f\u043e\u0432\u0442\u043e\u0440\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0445, \u0430 \u043e\u0441\u043c\u044b\u0441\u043b\u0435\u043d\u0438\u0435 \u043e\u043f\u044b\u0442\u0430 \u0438 \u043f\u0435\u0440\u0435\u0445\u043e\u0434 \u043e\u0442 \u0445\u043e\u0440\u043e\u0448\u0435\u0433\u043e \u043a \u043b\u0443\u0447\u0448\u0435\u043c\u0443.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/slyorm-sre-sploshnoj-eksperiment-c-ekspertami-iz-booking-com-i-google-com\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2020-02-07T21:00:00+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2020-02-18T11:04:30+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Sl\u00ebrm SRE. 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