{"id":32379,"date":"2019-10-31T21:46:42","date_gmt":"2019-10-31T18:46:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/dump-conference-grep-backend-devops\/"},"modified":"2019-10-31T21:46:42","modified_gmt":"2019-10-31T18:46:42","slug":"dump-conference-grep-backend-devops","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/dump-conference-grep-backend-devops","title":{"rendered":"DUMP konference | grep \u2018backend|devops\u2019","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Minul\u00fd t\u00fdden jsem se z\u00fa\u010dastnil IT konference DUMP (https:\/\/dump-ekb.ru\/) v Jekat\u011brinburgu a chci se pod\u011blit o to, o \u010dem se hovo\u0159ilo v sekc\u00edch Backend a DevOps, a zda stoj\u00ed za pozornost region\u00e1ln\u00ed IT konference.<\/p>\n<p><img decoding=\"async\" alt=\"DUMP konference | grep \u2018backend|devops\u2019\" src=\"\/wp-content\/uploads\/2019\/04\/41f20967837a55f879bad17ce62d5040.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Nikolai Sverchkov z Evil Martians o Serverless<\/i><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Co se vlastn\u011b d\u011blo?<\/h2>\n<p>\nCelkem na konferenci prob\u011bhlo 8 sekc\u00ed: Backend, Frontend, Mobiln\u00ed, Testov\u00e1n\u00ed a QA, DevOps, Design, V\u011bda a Management.<\/p>\n<p>Nejv\u011bt\u0161\u00ed s\u00e1ly byly mimochodem ve V\u011bd\u011b a Managementu )) Ka\u017ed\u00fd pro p\u0159ibli\u017en\u011b 350 lid\u00ed. Backend a Frontend byly jen o n\u011bco men\u0161\u00ed. Salonek DevOps byl nejmen\u0161\u00ed, ale velmi aktivn\u00ed.<\/p>\n<p>Poslouchal jsem p\u0159edn\u00e1\u0161ky v sekc\u00edch DevOps a Backend a trochu jsem si popov\u00eddal s p\u0159edn\u00e1\u0161ej\u00edc\u00edmi. Chci se pod\u011blit o prob\u00edran\u00e1 t\u00e9mata a ud\u011blat p\u0159ehled t\u011bchto sekc\u00ed na konferenci.<\/p>\n<p>V sekc\u00edch DevOps a Backend vystoupili z\u00e1stupci SKB-Kontur, DataArt, Evil Martians, webov\u00e9 studio Flag z Jekat\u011brinburgu, Miro (RealTimeBoard). T\u00e9mata se t\u00fdkala CI\/CD, pr\u00e1ce se slu\u017ebami fronty, logov\u00e1n\u00ed, dob\u0159e byly probr\u00e1ny t\u00e9mata Serverless a pr\u00e1ce s PostgreSQL v Go.<\/p>\n<p>D\u00e1le byly p\u0159edn\u00e1\u0161ky od Avito, Tinkoff, Yandex, Jetstyle, Megafon a banky Ak Bars, ale ty jsem fyzicky nestihl (videonahr\u00e1vky a slajdy p\u0159edn\u00e1\u0161ek je\u0161t\u011b nejsou dostupn\u00e9, slibuj\u00ed je zve\u0159ejnit b\u011bhem 2 t\u00fddn\u016f na dump-ekb.ru).<\/p>\n<h2>Sekce DevOps<\/h2>\n<p>\nCo m\u011b p\u0159ekvapilo \u2014 sekce prob\u00edhala v nejmen\u0161\u00edm s\u00e1le, asi pro 50 lid\u00ed. Lid\u00e9 st\u00e1li i v uli\u010dk\u00e1ch \ud83d\ude42 \u0158eknu o p\u0159edn\u00e1\u0161k\u00e1ch, kter\u00e9 jsem stihl poslechnout.<\/p>\n<h4>Elastik o v\u00e1ze petabajtu<\/h4>\n<p>\nSekce za\u010dala p\u0159edn\u00e1\u0161kou Vladim\u00edra Lila (SKB-Kontur) o Elasticsearch v Konturu. Maj\u00ed dost velk\u00fd a zat\u00ed\u017een\u00fd Elastik (~800 TB dat, ~1.3 petabajt v\u010detn\u011b redundancy). Elasticsearch pro v\u0161echny slu\u017eby Konturu je jednotn\u00fd, skl\u00e1d\u00e1 se ze 2 cluster\u016f (z 7 a 9 server\u016f), a je natolik d\u016fle\u017eit\u00fd, \u017ee v Konturu je speci\u00e1ln\u00ed in\u017een\u00fdr pro Elasticsearch (vlastn\u011b s\u00e1m Vladimir).<\/p>\n<p>Vladimir se tak\u00e9 pod\u011blil o n\u00e1zory na v\u00fdhody Elasticsearch a probl\u00e9my, kter\u00e9 zp\u016fsobuje.<\/p>\n<p>V\u00fdhody:<\/p>\n<ul>\n<li>V\u0161echny logy na jednom m\u00edst\u011b, snadn\u00fd p\u0159\u00edstup k nim<\/li>\n<li>Ukl\u00e1d\u00e1n\u00ed log\u016f po dobu jednoho roku a jejich snadn\u00e1 anal\u00fdza<\/li>\n<li>Vysok\u00e1 rychlost pr\u00e1ce s logy<\/li>\n<li>Skv\u011bl\u00e1 vizualizace dat \u201eout of the box\u201c<\/li>\n<\/ul>\n<p>\nProbl\u00e9my:<\/p>\n<ul>\n<li>broker zpr\u00e1v \u2014 must have (u Konturu ji hraje roli Kafka)<\/li>\n<li>zvl\u00e1\u0161tnosti pr\u00e1ce s Elasticsearch Curator (periodicky vytv\u00e1\u0159en\u00e1 vysok\u00e1 z\u00e1t\u011b\u017e z pravideln\u00fdch \u00fakol\u016f v Curator)<\/li>\n<li>\u017e\u00e1dn\u00e1 vestav\u011bn\u00e1 autorizace (pouze za samostatn\u00e9, pom\u011brn\u011b velk\u00e9 pen\u00edze, nebo jako open-source pluginy r\u016fzn\u00e9 \u00farovn\u011b p\u0159ipravenosti na produkci)<\/li>\n<\/ul>\n<p>\nO Open Distro for Elasticsearch byly pouze pozitivn\u00ed recenze \ud83d\ude42 Stejn\u00fd probl\u00e9m s autorizac\u00ed byl vy\u0159e\u0161en.<\/p>\n<p><b class=\"spoiler_title\">Odkud petabajt?<\/b>Jejich uzly se skl\u00e1daj\u00ed ze server\u016f s 12*8 Tb SATA + 2*2 Tb SSD. Studen\u00e9 \u00falo\u017ei\u0161t\u011b na SATA, SSD pouze pro horkou mezipam\u011b\u0165 (hot storage).<br \/>\n7+9 server\u016f, (7 + 9) * 12 * 8 = 1536 Tb.<br \/>\n\u010c\u00e1st m\u00edsta je v rezerv\u011b, vy\u010dlen\u011bn\u00e1 na redundantnost apod.<br \/>\nDo Elasticsearch se odes\u00edlaj\u00ed logy z p\u0159ibli\u017en\u011b 90 aplikac\u00ed, v\u010detn\u011b v\u0161ech slu\u017eeb reportingu Kontura, Elba atd.<\/p>\n<h4>Specifika v\u00fdvoje na Serverless<\/h4>\n<p>\nDal\u0161\u00ed prezentace Ruslana Serkina z DataArt o Serverless.<\/p>\n<p>Ruslan hovo\u0159il o tom, co v\u00fdvoj s p\u0159\u00edstupem Serverless v\u016fbec je a jak\u00e9 jsou jeho rysy.<\/p>\n<p>Serverless je p\u0159\u00edstup k v\u00fdvoji, p\u0159i kter\u00e9m se v\u00fdvoj\u00e1\u0159i nijak nedot\u00fdkaj\u00ed infrastruktury. P\u0159\u00edklad \u2014 AWS Lambda Serverless, Kubeless.io (Serverless uvnit\u0159 Kubernetes), Google Cloud Functions.<\/p>\n<p>Ide\u00e1ln\u00ed Serverless aplikace je prost\u011b funkce, kter\u00e1 pos\u00edl\u00e1 po\u017eadavek Serverless poskytovateli prost\u0159ednictv\u00edm speci\u00e1ln\u00edho API Gateway. Ide\u00e1ln\u00ed mikroslu\u017eba, p\u0159i\u010dem\u017e v AWS Lambda je podporov\u00e1no velk\u00e9 mno\u017estv\u00ed modern\u00edch programovac\u00edch jazyk\u016f. N\u00e1klady na \u00fadr\u017ebu a nasazen\u00ed infrastruktury se st\u00e1vaj\u00ed nulov\u00fdmi v p\u0159\u00edpad\u011b cloudov\u00fdch poskytovatel\u016f, podpora mal\u00fdch aplikac\u00ed bude tak\u00e9 velmi levn\u00e1 (AWS Lambda \u2014 0,2 $ \/ 1 milion jednoduch\u00fdch po\u017eadavk\u016f).<\/p>\n<p>\u0160k\u00e1lovatelnost takov\u00e9ho syst\u00e9mu je prakticky ide\u00e1ln\u00ed \u2014 cloudov\u00fd poskytovatel se o to star\u00e1 s\u00e1m, Kubeless se automaticky \u0161k\u00e1luje uvnit\u0159 clusteru Kubernetes.<\/p>\n<p>Existuj\u00ed nev\u00fdhody:<\/p>\n<ul>\n<li>v\u00fdvoj velk\u00fdch aplikac\u00ed se st\u00e1v\u00e1 slo\u017eit\u011bj\u0161\u00edm<\/li>\n<li>existuj\u00ed probl\u00e9my s profilov\u00e1n\u00edm aplikac\u00ed (m\u00e1te k dispozici pouze logy, ale ne profilaci ve zn\u00e1m\u00e9m smyslu)<\/li>\n<li>neexistuje verzov\u00e1n\u00ed<\/li>\n<\/ul>\n<p>\n\u0158eknu up\u0159\u00edmn\u011b, o Serverless jsem sly\u0161el u\u017e p\u0159ed n\u011bkolika lety, ale v\u0161echny ty roky jsem nech\u00e1pal, jak jej spr\u00e1vn\u011b aplikovat. Po prezentaci Ruslana se m\u00e9 pochopen\u00ed objevilo a po prezentaci Nikolaje Sver\u010dkov (Evil Martians) z Backend sekce se upevnilo. U\u017e jsem nemusel litovat, \u017ee jsem na konferenci \u0161el \ud83d\ude42<\/p>\n<h4>CI pro chud\u00e9, nebo m\u00e1 smysl ps\u00e1t vlastn\u00ed CI pro webovou studio<\/h4>\n<p>\nMikhail Radionov, vedouc\u00ed webov\u00e9 studia Flag z Jekat\u011brinburgu, hovo\u0159il o vlastn\u00edm CI\/CD.<\/p>\n<p>Jeho studio pro\u0161lo cestou od 'ru\u010dn\u00edho CI\/CD' (p\u0159ihl\u00e1sil se na server p\u0159es SSH, provedl git pull, opakovat 100kr\u00e1t denn\u011b) k Jenkins a k vlastn\u00edmu n\u00e1stroji umo\u017e\u0148uj\u00edc\u00edmu kontrolovat k\u00f3d a prov\u00e1d\u011bt releasy s n\u00e1zvem Pullkins.<\/p>\n<p>Pro\u010d t\u011b Jenkins nezaujal? Ned\u00e1val dostatek flexibility a byl p\u0159\u00edli\u0161 slo\u017eit\u00fd na p\u0159izp\u016fsoben\u00ed.<\/p>\n<p>\u201eFlag\u201c vyv\u00edj\u00ed na Laravel (PHP framework). P\u0159i v\u00fdvoji CI\/CD serveru vyu\u017eil Michail s kolegy zabudovan\u00e9 mechanismy Laravel nazvan\u00e9 Telescope a Envoy. V\u00fdsledkem je server na PHP, kter\u00fd zpracov\u00e1v\u00e1 p\u0159\u00edchoz\u00ed webhook po\u017eadavky, um\u00ed prov\u00e1d\u011bt build frontend\u016f a backend\u016f, nasazovat na r\u016fzn\u00e9 servery a reportovat do Slacku.<\/p>\n<p>Aby bylo mo\u017en\u00e9 prov\u00e1d\u011bt blue\/green deploy a m\u00edt jednotn\u00e1 nastaven\u00ed v dev-stage-prod prost\u0159ed\u00edch, p\u0159e\u0161li na Docker. V\u00fdhody z\u016fstaly stejn\u00e9, p\u0159ibyly mo\u017enosti homogenizace prost\u0159ed\u00ed a bezprobl\u00e9mov\u00e9ho nasazen\u00ed, a p\u0159ibylo tak\u00e9 pot\u0159eba se Docker nau\u010dit pro jeho spr\u00e1vnou pr\u00e1ci.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/michaelradionov\/pullkins\">Projekt je na Githubu<\/a><\/noindex><\/p>\n<h4>Jak jsme sn\u00ed\u017eili po\u010det rollback\u016f serverov\u00fdch release na 99%<\/h4>\n<p>\nPosledn\u00ed prezentaci v sekci Devops vedl Viktor Jerem\u010denko, Lead DevOps engineer ve Miro.com (b\u00fdval\u00e9m RealTimeBoard).<\/p>\n<p>Z\u00e1kladem RealTimeBoard, hlavn\u00edho produktu t\u00fdmu Miro, je monolitn\u00ed aplikace na Jav\u011b. Sestaven\u00ed, testov\u00e1n\u00ed a nasazen\u00ed bez v\u00fdpadk\u016f je n\u00e1ro\u010dn\u00fd \u00fakol. D\u016fle\u017eit\u00e9 je prov\u00e9st nasazen\u00ed takov\u00e9 verze k\u00f3du, aby nebylo nutn\u00e9 revertovat (t\u011b\u017ek\u00fd monolit).<\/p>\n<p>Na cest\u011b k vybudov\u00e1n\u00ed syst\u00e9mu, kter\u00fd to umo\u017e\u0148uje, Miro pro\u0161lo procesem zahrnuj\u00edc\u00edm pr\u00e1ci na architektu\u0159e, pou\u017e\u00edvan\u00fdch n\u00e1stroj\u00edch (Atlassian Bamboo, Ansible atd.) a pr\u00e1ci na struktu\u0159e t\u00fdm\u016f (maj\u00ed nyn\u00ed vyhrazen\u00fd DevOps t\u00fdm a mnoho jednotliv\u00fdch Scrum t\u00fdm\u016f slo\u017een\u00fdch z v\u00fdvoj\u00e1\u0159\u016f r\u016fzn\u00fdch profil\u016f).<\/p>\n<p>Cesta byla obt\u00ed\u017en\u00e1 a trnit\u00e1, a Viktor se pod\u011blil o nahromad\u011bn\u00e9 bolesti a z\u00e1rove\u0148 neuhasil optimismus.<\/p>\n<p><img decoding=\"async\" alt=\"DUMP konference | grep \u2018backend|devops\u2019\" src=\"\/wp-content\/uploads\/2019\/04\/ba6b7fe73d6a5f6bd3c5a372137aaac3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Vyhr\u00e1l knihu za ot\u00e1zky<\/i><\/p>\n<h2>Backend sekce<\/h2>\n<p>\nStihl jsem 2 prezentace \u2014 od Nikolaje Sver\u010dkova (Evil Martians) o Serverless a od Grigorije Ko\u0161eleva (spole\u010dnost Kontur) o telemetrii.<\/p>\n<h4>Serverless pro oby\u010dejn\u00e9 smrteln\u00edky<\/h4>\n<p>\nPokud Ruslan Sirkin hovo\u0159il o tom, co je Serverless, Nikolaj uk\u00e1zal jednoduch\u00e9 aplikace vyu\u017e\u00edvaj\u00edc\u00ed Serverless a popsal detaily, kter\u00e9 ovliv\u0148uj\u00ed n\u00e1klady a rychlost fungov\u00e1n\u00ed aplikac\u00ed v AWS Lambda.<\/p>\n<p>Zaj\u00edmav\u00fd detail: minim\u00e1ln\u011b placen\u00fd prvek \u2014 128 MB pam\u011bti a 100 ms CPU, stoj\u00ed 0,000000208 $. P\u0159itom 1 milion podobn\u00fdch po\u017eadavk\u016f m\u011bs\u00ed\u010dn\u011b je zdarma.<\/p>\n<p>N\u011bkter\u00e9 funkce u Nikolaje \u010dasto p\u0159ekra\u010dovaly limit 100 ms (hlavn\u00ed aplikace byla naps\u00e1na v Ruby), tak\u017ee p\u0159episov\u00e1n\u00ed na Go p\u0159ineslo skv\u011blou \u00fasporu.<\/p>\n<h4>Vostok Hercules \u2014 ud\u011blejte telemetrii skv\u011blou znovu!<\/h4>\n<p>\nPosledn\u00ed prezentace sekce Backend od Grigorije Ko\u0161elevu (firma Kontur) o telemetrii. Telemetrie jsou logy, metriky, trasov\u00e1n\u00ed aplikac\u00ed.<\/p>\n<p>Kontur k tomu pou\u017e\u00edv\u00e1 vlastn\u00ed n\u00e1stroje, kter\u00e9 jsou zve\u0159ejn\u011bny na Githubu. N\u00e1stroj z prezentace \u2014 Hercules, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/vostok\/hercules\">github.com\/vostok\/hercules<\/a><\/noindex>, se pou\u017e\u00edv\u00e1 pro doru\u010dov\u00e1n\u00ed telemetrick\u00fdch dat.<\/p>\n<p>V prezentaci Vladimira Lily v sekci Devops bylo zkoum\u00e1no ukl\u00e1d\u00e1n\u00ed a zpracov\u00e1n\u00ed log\u016f v Elasticsearch, ale je tu tak\u00e9 \u00fakol doru\u010dit logy z mnoha tis\u00edc\u016f za\u0159\u00edzen\u00ed a aplikac\u00ed, a ten vy\u0159e\u0161ily n\u00e1stroje jako Vostok Hercules.<\/p>\n<p>Kontur pro\u0161el zn\u00e1mou cestou \u2014 od RabbitMQ k Apache Kafka, ale nen\u00ed to tak jednoduch\u00e9 )) Museli do sch\u00e9matu p\u0159idat Zookeeper, Cassandru a Graphite. Informace z t\u00e9to prezentace neodhal\u00edm pln\u011b (nen\u00ed to moje specializace), pokud v\u00e1s zaj\u00edm\u00e1 \u2014 m\u016f\u017eete si po\u010dkat na slajdy a video na webu konference.<\/p>\n<h2>Jak to srovnat s jin\u00fdmi konferencemi?<\/h2>\n<p>\nNemohu srovnat s konferencemi v Moskv\u011b a SPb, mohu srovnat s jin\u00fdmi akcemi na Uralu a s 404fest v Sam\u00e1\u0159e.<\/p>\n<p>DAMP se kon\u00e1 v 8 sekc\u00edch, co\u017e je rekord pro uralsk\u00e9 konference. Velmi velk\u00e9 sekce Science a Management, co\u017e je tak\u00e9 neobvykl\u00e9. Publikum v Jekat\u011brinburgu je dost strukturovan\u00e9 \u2014 ve m\u011bst\u011b jsou velk\u00e9 v\u00fdvojov\u00e9 odbory Jandexu, Konturu, Tinkoffa, co\u017e m\u00e1 vliv i na prezentace.<\/p>\n<p>Dal\u0161\u00ed zaj\u00edmav\u00fd moment \u2014 mnoho firem m\u00e1 hned 3\u20134 p\u0159edn\u00e1\u0161ej\u00edc\u00ed na konferenci (tak to bylo u Konturu, Evil Martians, Tinkoffa). Mnoz\u00ed z nich byli sponzo\u0159i, ale prezentace byly na \u00farovni s ostatn\u00edmi, to nejsou reklamn\u00ed prezentace.<\/p>\n<p>J\u00edt nebo nej\u00edt? Pokud \u017eijete na Uralu nebo pobl\u00ed\u017e, m\u00e1te mo\u017enost a zaj\u00edmaj\u00ed v\u00e1s t\u00e9mata \u2014 ano, samoz\u0159ejm\u011b. Pokud uva\u017eujete o del\u0161\u00ed cest\u011b \u2014 mrknul bych se na t\u00e9mata prezentac\u00ed a videa z p\u0159edchoz\u00edch let. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/user\/videoitpeople\/videos\">www.youtube.com\/user\/videoitpeople\/videos<\/a><\/noindex> a ud\u011blal rozhodnut\u00ed.<br \/>\nDal\u0161\u00ed plus konferenc\u00ed v regionech obvykle je \u2014 snadno se po p\u0159edn\u00e1\u0161k\u00e1ch spoj\u00edte se speakerem, proto\u017ee uchaze\u010d\u016f o takovou komunikaci je m\u00e9n\u011b.<\/p>\n<p><img decoding=\"async\" alt=\"DUMP konference | grep \u2018backend|devops\u2019\" src=\"\/wp-content\/uploads\/2019\/04\/0b60db17e153e0720a763e9f5faa6544.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nD\u011bkuji DAMPu a Jekat\u011brinburgu! )<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/449440\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0430 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u043d\u0435\u0434\u0435\u043b\u0435 \u044f \u0441\u0445\u043e\u0434\u0438\u043b \u043d\u0430 IT \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u044e DUMP (https:\/\/dump-ekb.ru\/) \u0432 \u0415\u043a\u0430\u0442\u0435\u0440\u0438\u043d\u0431\u0443\u0440\u0433\u0435 \u0438 \u0445\u043e\u0447\u0443 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u0442\u044c, \u043e \u0447\u0435\u043c \u0448\u043b\u0430 \u0440\u0435\u0447\u044c \u0432 \u0441\u0435\u043a\u0446\u0438\u044f\u0445 Backend \u0438 Devops, \u0438 \u0441\u0442\u043e\u044f\u0442 \u043b\u0438 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u044f \u0440\u0435\u0433\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 IT 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