{"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\/et\/blog\/administrirovanie\/slyorm-sre-sploshnoj-eksperiment-c-ekspertami-iz-booking-com-i-google-com","title":{"rendered":"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Meie meeskond armastab katsetada. Iga SLRM ei ole staatiliselt korduv eelneva, vaid kogemuse anal\u00fc\u00fcs ja \u00fcleminek heast paremale. Kuid <noindex><a rel=\"nofollow\" href=\"https:\/\/slurm.io\/sre\">SLRM SRE<\/a><\/noindex> otsustasime rakendada t\u00e4iesti uut formaati \u2014 luua osalejatele tingimused, mis on v\u00f5imalikult l\u00e4hedased \"lahingutingimustele\". <\/p>\n<p><\/p>\n<p>Kui l\u00fchidalt kirjeldada, millega me intensiivselt tegelesime: \"Ehitatame, l\u00f5hkume, parandame,<br \/>\nuurime.\" SRE-l pole teoorias suurt v\u00e4\u00e4rtust \u2014 ainult praktika, reaalsed lahendused, reaalsed probleemid. <\/p>\n<p><\/p>\n<p>Osalejad jagati meeskondadesse, et elav v\u00f5istlusvaim ei laseks kedagi uinuda ega \"Angry Birdsi\" iPhone'is k\u00e4ivitada Dmitri Anatoljevit\u0161i eeskujul. <\/p>\n<p><\/p>\n<p>Probleeme, vigu, bug'e ja \u00fclesandeid tagas osalejatele neli mentorit. Ivan Kruglov, Booking.com-i peamine arendaja (Holland). Ben Tyler, Booking.com-i peamine arendaja (USA). Eduard Medvedev, Tungsten Labs-i CTO (Saksamaa). Evgeni Varavva, Google'i mitmekesine arendaja (San Francisco).<\/p>\n<p><\/p>\n<p>Ja osalejad on jagatud meeskondadesse \u2014 ja v\u00f5istlevad omavahel. Kas see ei ole huvitav? <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/ebfaccd92a805f1dff89a20938e5dece.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Ivan, Ben, Eduard ja Evgeni vaatavad heatahtliku Lenini pilguga vaeseid SLRM SRE osalejaid enne v\u00f5istluse algust.<\/em><\/p>\n<p><\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex>Nii et \u00fclesanne: <\/p>\n<p><\/p>\n<p><strong>\u041c\u044b \u043d\u0430\u0448, \u043c\u044b \u043d\u043e\u0432\u044b\u0439 \u043c\u0438\u0440 \u043f\u043e\u0441\u0442\u0440\u043e\u0438\u043c&#8230;<\/strong><\/p>\n<p><\/p>\n<p>On olemas piletite kogumise veebisait. \u00d5nnetuste stsenaariume kirjutavad mentorid ette t\u00f6\u00f6tatud plaani kohaselt (kuigi keegi ei v\u00e4lista erilisi ja kavalate improviseerimist), saidi t\u00f6\u00f6kindlust kirjeldatakse erinevate m\u00f5\u00f5dikute j\u00e4rgi. Probleemid v\u00f5ivad olla v\u00e4ga erinevad: \u00abMoulin Rouge\u00bb teatri piletid ei laadi andmebaasi; filmide ja etenduste plakatid laaditakse andmebaasi enam kui 10 sekundi jooksul; \u00fche filmiga seotud kirjeldus hangub; 0,1% tellimustest j\u00f5uab juba reserveeritud kohtadele; perioodiliselt kukub makses\u00fcsteem minutiks-kaks \u00e4ra. Ja palju-palju-palju ebameeldivat, mis v\u00f5ib tabada SRE Sl\u00ebrm osalist tema t\u00f5elisel t\u00f6\u00f6l. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/65b1acafbfa8a39fec6dfc40c16d594e.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Me oleme valmis k\u00f5ikide v\u00e4ljakutsetega toime tulema\u2026 ja k\u00f5igiga.<\/em><\/p>\n<p><\/p>\n<p>Meie paljuda teid h\u00e4sti teenindav veebisait koosneb mitmest mikroteenusest. Selle \u00fclesanne on koguda andmeid seansside, hindade ja vaba kohtade kohta k\u00f5ikides kinodes, see kuvab filmide eelvaateid, v\u00f5imaldab valida kino, seansi, saali ja kohta, broneerida ja maksta pileteid. \u00dches\u00f5naga, k\u00f5ik, millest vaataja vaid unistada oskab. Ainult et kasutaja ei aimagi, milline titaanlik v\u00f5itlus stabiilsuse ja saidi kergesti k\u00e4tte saamise nimel toimub selle sees. <\/p>\n<p><\/p>\n<p>Intensiivkursuse jaoks koostasime saidile SLO, SLI, SLA n\u00e4itajad, t\u00f6\u00f6tasime v\u00e4lja arhitektuuri ja infrastruktuuri, juurutame saidi, seadistasime j\u00e4lgimise ja h\u00e4irete s\u00fcsteemi. Ja l\u00e4ks lahti. <\/p>\n<p>\n<b class=\"spoiler_title\">SLO, SLI, SLA<\/b><\/p>\n<blockquote><p>SLI \u2014 teenuse taseme indikaatorid. SLO \u2014 teenuse taseme eesm\u00e4rgid. SLA \u2014 teenuse taseme lepingud. <\/p>\n<p>SLA \u2014 ITILi metoodika termin, mis t\u00e4histab ametlikku lepingut teenuse tellija ja selle pakkuja vahel, mis sisaldab teenuse kirjeldust, osapoolte \u00f5igusi ja kohustusi ning mis on k\u00f5ige t\u00e4htsam, kokku lepitud kvaliteeditase, millega seda teenust osutatakse.<\/p>\n<p>SLO \u2014 see teenus taseme eesm\u00e4rk: sihttase v\u00f5i vahemik teenuse taseme v\u00e4\u00e4rtuste jaoks, mida m\u00f5\u00f5detakse SLI kaudu. Tavaline SLO v\u00e4\u00e4rtus on \"SLI \u2264 sihttase\" v\u00f5i \"madalam piir \u2264 SLI \u2264 \u00fclemine piir\". <\/p>\n<p>SLI on teenuse taseme n\u00e4itaja \u2014 hoolikalt m\u00e4\u00e4ratletud kvantitatiivne m\u00f5\u00f5dik \u00fche teenuse taseme aspekti kohta. Enamiku teenuste puhul peetakse peamiseks SLI-ks p\u00e4ringu latentsust \u2014 kui kaua kulub vastuse saamiseks. Teised levinud SLI-d h\u00f5lmavad vigade m\u00e4\u00e4ra, mis sageli v\u00e4ljendatakse k\u00f5igi saadud p\u00e4ringute osakaaluna, ja s\u00fcsteemi l\u00e4bilaskev\u00f5imet, mida m\u00f5\u00f5detakse tavaliselt p\u00e4ringutes sekundis.<\/p><\/blockquote>\n<p><\/p>\n<p><strong>\u041f\u0435\u0440\u0432\u044b\u043c \u0434\u0435\u043b\u043e\u043c \u043c\u044b \u0441\u043b\u043e\u043c\u0430\u0435\u043c \u0441\u0430\u043c\u043e\u043b\u0451\u0442\u044b, \u043d\u0443 \u0430 \u0434\u0435\u0432\u0443\u0448\u0435\u043a, \u0430 \u0434\u0435\u0432\u0443\u0448\u0435\u043a \u043f\u043e\u0442\u043e\u043c&#8230;<\/strong><\/p>\n<p><\/p>\n<p>Sisemised ja v\u00e4lised tegurid hakkasid esimesest hetkest SLO-d \"rikkuma\". K\u00f5ik kukkus administraatorite kaela \u2014 nii arendajate vead, infrastruktuuri t\u00f5rked, k\u00fclastajate vool kui ka DDoS-r\u00fcnnakud. K\u00f5ik see halvendab SLO-d. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/b40305470369f0a40692214fa9f68f2c.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\"- Kallid osalejad, mul on hea meel teid r\u00f5\u00f5mustada, k\u00f5igepealt kukub teil... k\u00f5ik!\"<\/em><\/p>\n<p><\/p>\n<p>Esitluste k\u00e4igus arutati vastupidavust, vigade eelarvet, testimise praktikat, katkestuste ja operatiivkoormuse juhtimist.<\/p>\n<p><\/p>\n<p><strong>\u041d\u0435 \u043a\u043e\u0447\u0435\u0433\u0430\u0440\u044b \u043c\u044b, \u043d\u0435 \u043f\u043b\u043e\u0442\u043d\u0438\u043a\u0438&#8230;<\/strong><\/p>\n<p><\/p>\n<p>Siin hakkasid osalejad parandama \u2014 peamine on m\u00f5ista, millest alustada. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/c55d8d81dd6c945e399c82e23708fc62.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u201e- Jumal k\u00fcll, ma pole kunagi n\u00e4inud, et see nii katki l\u00e4heks, sellises seisus ja sellises asendis!\u201d<\/em><\/p>\n<p><\/p>\n<p>Nii et toimus \u00f5nnetus. Makseteenuste s\u00fcsteem kukkus alla. Kuidas tegutseda, et taastada funktsionaalsus v\u00f5imalikult kiiresti?<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/821795a5de152b7500c1b8a7bf08321d.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Eksperdid vaatavad osalejatele heldelt ja valmistavad j\u00e4rgmise \u00fcllatuse.<\/em><\/p>\n<p><\/p>\n<p>Iga meeskond korraldab grupi t\u00f6\u00f6d \u00f5nnetuse likvideerimiseks \u2014 kaasatakse kolleege, teavitatakse huvitatud osalisi (stakeholders). Samuti m\u00e4\u00e4ratakse prioriteedid. Nii harjutasid osalejad t\u00f6\u00f6tama surve all \u00e4\u00e4rmiselt piiratud ajatingimustes.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/db5502dcf79f693895027d7185f37e79.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u201e- Mis see hirmsa asi on?!\u201c<\/em><\/p>\n<p><\/p>\n<p><strong>Hingeti s\u00fcgavalt\u2026 ja l\u00f5petati harjutus.<\/strong><\/p>\n<p><\/p>\n<p>Koos esinejatega uuriti p\u00e4rast iga lahendatud probleemi ja ajutiselt stabiliseeritud veebisaiti SRE meeskond s\u00fcndmusi. Probleemide anal\u00fc\u00fcsimine oli p\u00f5hjalik \u2013 tekkep\u00f5hjused ja lahendamine. P\u00e4rast seda, nii meeskondlikult kui kollektiivselt, tehti otsus nende edasise ennetamise osas: kuidas paremini j\u00e4lgida, kuidas \u00f5igesti muuta arhitektuuri, kuidas kohandada arendus- ja t\u00f6\u00f6korraldust, kuidas reguleerida protseduure. Esinejad demonstreerisid post-mortem'i praktikate l\u00e4biviimist. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/0574ff085c8d9c73c6ea84b52735cac1.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>\u201e- Kes veel tahab piinlemist! \u2014 Mina!\u201d<\/em><\/p>\n<p><\/p>\n<p>Elektroonilisel tahvlil fikseeriti rangelt ja selgelt meeskondade edusammud. <\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/033f5c167a26252b223d9ce172ced901.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Esikohtade eest \u2013 preemia sidusr\u00fchmadelt.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sle\u0259rm SRE. Pidev eksperimenteerimine ekspertidega Booking.com ja Google.com.\" src=\"\/wp-content\/uploads\/2020\/02\/9f0e0272bcbfc4f93ea4d83a520eed37.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Allikas: <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. 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