{"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\/no\/blog\/administrirovanie\/slyorm-sre-sploshnoj-eksperiment-c-ekspertami-iz-booking-com-i-google-com","title":{"rendered":"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Teamet v\u00e5rt elsker eksperimenter. Hver Sl\u00f8rm er ikke et statisk gjentakelse av tidligere, men en forst\u00e5else av erfaringer og en overgang fra det gode til det bedre. Men med <noindex><a rel=\"nofollow\" href=\"https:\/\/slurm.io\/sre\">Sl\u00f8rm SRE<\/a><\/noindex> har vi bestemt oss for \u00e5 bruke et helt nytt format \u2013 \u00e5 gi deltakerne forhold som er s\u00e5 n\u00e6r \u00abkrigsforhold\u00bb som mulig. <\/p>\n<p><\/p>\n<p>Kort sagt om hva vi gjorde p\u00e5 intensivkurset: \u00abVi bygger, \u00f8delegger, fikser,<br \/>\nl\u00e6rer\u00bb. SRE har lite verdi i ren teori \u2013 det er kun praksis, reelle l\u00f8sninger og virkelige problemer som teller. <\/p>\n<p><\/p>\n<p>Deltakerne ble delt inn i lag for at den livlige konkurranse\u00e5nden ikke skulle la noen sovne eller begynne \u00e5 spille \u00abAngry Birds\u00bb p\u00e5 iPhone som eksempelvis Dmitrij Anatoljevitsj. <\/p>\n<p><\/p>\n<p>Problemer, bugs, og oppgaver ble gitt til deltakerne av fire mentorer. Ivan Kruglov, Principal Developer hos Booking.com (Nederland). Ben Tyler, Principal Developer hos Booking.com (USA). Eduard Medvedev, CTO hos Tungsten Labs (Tyskland). Evgenij Varavva, allsidig utvikler hos Google (San Francisco).<\/p>\n<p><\/p>\n<p>Og deltakerne er delt inn i lag \u2013 og konkurrerer med hverandre. Interessant? <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/ebfaccd92a805f1dff89a20938e5dece.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Ivan, Ben, Eduard og Evgenij ser med et vennlig Lenin-lignende blikk p\u00e5 de stakkars deltakerne f\u00f8r Sl\u00f8rm SRE-konkurransen begynner.<\/em><\/p>\n<p><\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex>S\u00e5 oppgaven er: <\/p>\n<p><\/p>\n<p><strong>Vi v\u00e5rt, vi skal bygge en ny verden\u2026<\/strong><\/p>\n<p><\/p>\n<p>Det finnes en nettsted-aggregator for kinobilletter. Hendelsene blir funnet p\u00e5 av mentorene i et n\u00f8ye utarbeidet manus (selv om ingen utelukker spesielt uts\u00f8kt og utspekulert improvisasjon), og nettstedets funksjonalitet beskrives med ulike metrikker. Problemene kan v\u00e6re mange og varierte: billetter til teateret \u00abMoulin Rouge\u00bb laster ikke inn i databasen; poster for filmer og forestillinger laster inn i databasen p\u00e5 mer enn 10 sekunder; beskrivelsen av en enkelt film henger; 0,1% av bestillingene havner allerede p\u00e5 reserverte plasser; betalingssystemet faller fra i ett minutt eller to. Og alt det ubehagelige som kan ramme deltakerne i Sl\u00f8rm SRE i deres virkelige arbeid. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/65b1acafbfa8a39fec6dfc40c16d594e.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Vi er klare til \u00e5 takle alt\u2026 og alle.<\/em><\/p>\n<p><\/p>\n<p>V\u00e5r utsatte nettside best\u00e5r av flere mikrotjenester. Dens oppgave er \u00e5 aggregere data om visninger, priser og tilgjengelige seter fra alle kinoer, vise filmannonser, la brukeren velge kino, visning, sal og sete, samt \u00e5 reservere og betale for billetter. I grunn er det alt en seer kan dr\u00f8mme om. Men brukeren aner ikke om den titanske kampen for stabilitet og tilgjengelighet som foreg\u00e5r internt. <\/p>\n<p><\/p>\n<p>For nettsiden under intensivprogrammet har vi dannet SLO-, SLI- og SLA-m\u00e5l, utviklet arkitektur og infrastruktur, deployert nettstedet, satt opp overv\u00e5kning og varsling. Og s\u00e5 begynte det. <\/p>\n<p>\n<b class=\"spoiler_title\">SLO, SLI, SLA<\/b><\/p>\n<blockquote><p>SLI er tjenesteniv\u00e5indikatorer. SLO er tjenesteniv\u00e5m\u00e5l. SLA er tjenesteniv\u00e5avtaler. <\/p>\n<p>SLA er en term fra ITIL-metodikk, som betegner en formell avtale mellom tjenestemottakeren og tjenesteleverand\u00f8ren, som inneholder en beskrivelse av tjenesten, rettigheter og plikter for partene, og viktigst av alt, den avtalte kvaliteten p\u00e5 tjenesten som tilbys.<\/p>\n<p>SLO er m\u00e5let for tjenesteniv\u00e5: et m\u00e5lverdi eller et spenn av verdier for tjenesteniv\u00e5et, som m\u00e5les gjennom SLI. Den normale verdien for SLO er \u00abSLI \u2264 m\u00e5lverdi\u00bb eller \u00abnedre grense \u2264 SLI \u2264 \u00f8vre grense\u00bb. <\/p>\n<p>SLI er en indikator for tjenesteniv\u00e5 - en n\u00f8ye definert kvantitativ m\u00e5ling av ett aspekt ved det leverte tjenesteniv\u00e5et. For de fleste tjenester er den viktigste SLI responstid - hvor lang tid det tar \u00e5 returnere et svar p\u00e5 en foresp\u00f8rsel. Andre vanlige SLI inkluderer feilmengde, ofte uttrykt som andelen av alle mottatte foresp\u00f8rselene, og systemets gjennomstr\u00f8mning, vanligvis m\u00e5lt i foresp\u00f8rslene per sekund.<\/p><\/blockquote>\n<p><\/p>\n<p><strong>F\u00f8rst skal vi bryte flyene, og s\u00e5 jentene, jentene etterp\u00e5\u2026<\/strong><\/p>\n<p><\/p>\n<p>Interne og eksterne faktorer begynte \u00e5 \u00ab\u00f8delegge\u00bb SLO fra de f\u00f8rste minuttene. Alt mulig ble kastet over hodene p\u00e5 administratorene - b\u00e5de utviklerfeil, infrastrukturfeil, \u00f8kt trafikk og DDoS-angrep. Alt som forverrer SLO. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/b40305470369f0a40692214fa9f68f2c.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u00ab- Kj\u00e6re deltakere, jeg har gleden av \u00e5 meddele, det f\u00f8rste som skjer er at dere mister... alt!\u00bb<\/em><\/p>\n<p><\/p>\n<p>Underveis diskuterte foredragsholderne robusthet, fe budget, testpraksis, h\u00e5ndtering av avbrudd og operasjonell belastning.<\/p>\n<p><\/p>\n<p><strong>Vi er ikke fyrb\u00f8tere, ikke snekkere\u2026<\/strong><\/p>\n<p><\/p>\n<p>Her begynte deltakerne \u00e5 fikse \u2014 det viktigste er \u00e5 forst\u00e5 hva man skal ta tak i f\u00f8rst. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/c55d8d81dd6c945e399c82e23708fc62.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u00ab- Herregud, jeg har aldri sett noe s\u00e5nt bryte sammen, i en s\u00e5nn tilstand og i en s\u00e5nn stilling!\u00bb<\/em><\/p>\n<p><\/p>\n<p>S\u00e5, en ulykke har skjedd. Betalingsbehandlingssystemet har krasjet. Hva skal man gj\u00f8re for \u00e5 gjenopprette funksjonaliteten s\u00e5 raskt som mulig?<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/821795a5de152b7500c1b8a7bf08321d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Ekspertene kaster et vennlig blikk p\u00e5 deltakerne og forbereder en ny utfordring.<\/em><\/p>\n<p><\/p>\n<p>Hver gruppe organiserer arbeidet med \u00e5 eliminere ulykken \u2014 involverer kolleger, informerer interessenter. Samtidig settes prioriteringer. Slik trente deltakerne p\u00e5 \u00e5 jobbe under press i uhyre begrenset tid.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/db5502dcf79f693895027d7185f37e79.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u00ab- Hva i all verden er dette for noe?!\u00bb<\/em><\/p>\n<p><\/p>\n<p><strong>De trakk pusten ... og fullf\u00f8rte \u00f8velsen.<\/strong><\/p>\n<p><\/p>\n<p>Sammen med foredragsholderne etter hvert l\u00f8st problem og midlertidig stabilisert nettsted, studerte teamene hendelsene fra SREs perspektiv. De analyserte detaljert problemene \u2014 \u00e5rsakene og prosessen for \u00e5 l\u00f8se dem. Deretter, b\u00e5de som lag og kollektivt, tok de beslutninger om videreforebygging: hvordan forbedre overv\u00e5kingen, hvordan endre arkitekturen fornuftig, hvordan justere tiln\u00e6rmingen til utvikling og drift, og hvordan korrigere regelverkene. Foredragsholderne viste hvordan en post-mortem gjennomf\u00f8res. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/0574ff085c8d9c73c6ea84b52735cac1.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u00ab- Hvem vil ha mer lidelse! \u2014 Jeg!\u00bb<\/em><\/p>\n<p><\/p>\n<p>P\u00e5 det elektroniske tavlen ble lagenes fremgang strengt og tydelig registrert. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/033f5c167a26252b223d9ce172ced901.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>For f\u00f8rsteplassene \u2014 premie fra interessentene.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sleurm SRE. En hel eksperiment med eksperter fra Booking.com og Google.com\" src=\"\/wp-content\/uploads\/2020\/02\/9f0e0272bcbfc4f93ea4d83a520eed37.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Kilde: <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\/no\/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=\"nn_NO\" \/>\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\/no\/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\u00f8rem SRE. 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