{"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\/sk\/blog\/administrirovanie\/dump-conference-grep-backend-devops","title":{"rendered":"DUMP conference | grep \u2018backend|devops\u2019","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Minul\u00fd t\u00fd\u017ede\u0148 som nav\u0161t\u00edvil IT konferenciu DUMP (https:\/\/dump-ekb.ru\/) v Jekaterinburgu a chcem sa podeli\u0165 o to, o \u010dom sa hovorilo na sekci\u00e1ch Backend a Devops, a \u010di stoja za to region\u00e1lne IT konferencie.<\/p>\n<p><img decoding=\"async\" alt=\"DUMP conference | grep \u2018backend|devops\u2019\" src=\"\/wp-content\/uploads\/2019\/04\/41f20967837a55f879bad17ce62d5040.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Nikolaj Sver\u010dkov z Evil Martians o Serverless<\/i><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>O \u010dom tam vlastne bolo?<\/h2>\n<p>\nNa konferencii bolo celkovo 8 sekci\u00ed: Backend, Frontend, Mobile, Testovanie a QA, Devops, Dizajn, Veda a Management.<\/p>\n<p>Najv\u00e4\u010d\u0161ie s\u00e1ly, mimochodom, mali Veda a Management, ka\u017ed\u00e1 pre pribli\u017ene 350 \u013eud\u00ed. Backend a Frontend boli len o nie\u010do men\u0161ie. S\u00e1la Devops bola najmen\u0161ia, ale ve\u013emi akt\u00edvna.<\/p>\n<p>Po\u010d\u00faval som predn\u00e1\u0161ky v sekci\u00e1ch Devops a Backend a trochu som sa porozpr\u00e1val s predn\u00e1\u0161ate\u013emi. Chcem sa podeli\u0165 o t\u00e9mach, ktor\u00e9 boli rozobrat\u00e9, a zhodnoti\u0165 tieto sekcie na konferencii.<\/p>\n<p>V sekci\u00e1ch Devops a Backend vyst\u00fapili z\u00e1stupcovia SKB-Kontur, DataArt, Evil Martians, jekaterinbursk\u00e9ho webov\u00e9ho \u0161t\u00fadia Flag, Miro (RealTimeBoard). T\u00e9my sa t\u00fdkali CI\/CD, pr\u00e1ce so slu\u017ebami frontov, logovania, dobre boli rozobrat\u00e9 t\u00e9my Serverless a pr\u00e1ca s PostgreSQL v Go.<\/p>\n<p>Boli tie\u017e predn\u00e1\u0161ky od Avito, Tinkoff, Yandex, Jetstyle, Megafon, banky Ak Bars, ale fyzicky som sa ich nemohol z\u00fa\u010dastni\u0165 (videoz\u00e1znamy a slajdy predn\u00e1\u0161ok zatia\u013e nie s\u00fa dostupn\u00e9, s\u013eubuj\u00fa ich zverejni\u0165 do dvoch t\u00fd\u017ed\u0148ov na dump-ekb.ru).<\/p>\n<h2>Sekcia Devops<\/h2>\n<p>\n\u010co ma prekvapilo \u2014 sekcia prebiehala v najmen\u0161ej s\u00e1le, s pribli\u017ene 50 miestami. \u013dudia st\u00e1li aj na chodb\u00e1ch \ud83d\ude42 Podel\u00edm sa o predn\u00e1\u0161ky, ktor\u00e9 som stihol po\u010du\u0165.<\/p>\n<h4>Elastick\u00fd v\u00e1\u017eiaci petabajt<\/h4>\n<p>\nSekcia za\u010dala predn\u00e1\u0161kou Vladimira Lila (SKB-Kontur) o Elasticsearch v Konture. Maj\u00fa dos\u0165 ve\u013ek\u00fd a pre\u0165a\u017een\u00fd Elasticsearch (~800 TB \u00fadajov, ~1.3 petabajt s pr\u00edrastkom). Elasticsearch pre v\u0161etky slu\u017eby Kontra je jedine\u010dn\u00fd, pozost\u00e1va z dvoch klastrov (z 7 a 9 serverov) a je natolik d\u00f4le\u017eit\u00fd, \u017ee v Kontru maj\u00fa \u0161peci\u00e1lneho in\u017einiera pre Elasticsearch (vlastne, Vladimira).<\/p>\n<p>Vladimir sa tie\u017e podelil o my\u0161lienky o pr\u00ednose Elasticsearch a probl\u00e9moch, ktor\u00e9 sp\u00f4sobuje.<\/p>\n<p>Pr\u00ednosy:<\/p>\n<ul>\n<li>V\u0161etky logy na jednom mieste, jednoduch\u00fd pr\u00edstup k nim<\/li>\n<li>Ukladanie logov na rok a ich jednoduch\u00e1 anal\u00fdza<\/li>\n<li>Vysok\u00e1 r\u00fdchlos\u0165 pr\u00e1ce s logmi<\/li>\n<li>Skvel\u00e1 vizualiz\u00e1cia \u00fadajov 'z krabice'<\/li>\n<\/ul>\n<p>\nProbl\u00e9my:<\/p>\n<ul>\n<li>Broker spr\u00e1v \u2014 must have (v Kontru t\u00fato \u00falohu pln\u00ed Kafka)<\/li>\n<li>\u0161pecifik\u00e1 pr\u00e1ce s Elasticsearch Curator (pravidelne sa vytv\u00e1ra vysok\u00e9 za\u0165a\u017eenie z pravideln\u00fdch \u00faloh v Curator)<\/li>\n<li>nie je integrovan\u00e1 autoriz\u00e1cia (iba za samostatn\u00e9, dos\u0165 vysok\u00e9 peniaze, alebo ako open source pluginy r\u00f4znej \u00farovne pripravenosti na produkciu)<\/li>\n<\/ul>\n<p>\nO Open Distro for Elasticsearch boli len pozit\u00edvne recenzie \ud83d\ude42 Rovnako je tam vyrie\u0161en\u00e1 ot\u00e1zka autoriz\u00e1cie.<\/p>\n<p><b class=\"spoiler_title\">Odkia\u013e petabajt?<\/b>Ich uzly pozost\u00e1vaj\u00fa zo serverov s 12*8 Tb SATA + 2*2 Tb SSD. Studen\u00e9 \u00falo\u017eisko na SATA, SSD len pre hor\u00facu cache (hot storage).<br \/>\n7+9 serverov, (7 + 9) * 12 * 8 = 1536 Tb.<br \/>\n\u010cas\u0165 miesta je v rezervne, vyhraden\u00e9 na redundantnos\u0165 a pod.<br \/>\nDo Elasticsearch sa odosielaj\u00fa logy z pribli\u017ene 90 aplik\u00e1ci\u00ed, vr\u00e1tane v\u0161etk\u00fdch reportovac\u00edch slu\u017eieb Kont\u00faru, Elba a pod.<\/p>\n<h4>Vlastnosti v\u00fdvoja na Serverless<\/h4>\n<p>\n\u010ealej nasledovala prezent\u00e1cia Ruslana Sergeyina z DataArt o Serverless.<\/p>\n<p>Ruslan hovoril o tom, \u010do je v\u00fdvoj s pr\u00edstupom Serverless a ak\u00e9 s\u00fa jeho vlastnosti.<\/p>\n<p>Serverless je pr\u00edstup k v\u00fdvoju, pri ktorom sa v\u00fdvoj\u00e1ri nijak\u00fdm sp\u00f4sobom nedot\u00fdkaj\u00fa infra\u0161trukt\u00fary. Pr\u00edklady \u2014 AWS Lambda Serverless, Kubeless.io (Serverless v r\u00e1mci Kubernetes), Google Cloud Functions.<\/p>\n<p>Ide\u00e1lna Serverless aplik\u00e1cia je iba funkcia, ktor\u00e1 posiela po\u017eiadavku Serverless poskytovate\u013eovi cez \u0161peci\u00e1lny API Gateway. Ide\u00e1lny mikroslu\u017eba, pri\u010dom v r\u00e1mci AWS Lambda je podporovan\u00e1 ve\u013ek\u00e1 \u0161k\u00e1la modern\u00fdch programovac\u00edch jazykov. N\u00e1klady na podporu a nasadenie infra\u0161trukt\u00fary sa st\u00e1vaj\u00fa nulov\u00fdmi v pr\u00edpade cloudov\u00fdch poskytovate\u013eov, podpora mal\u00fdch aplik\u00e1ci\u00ed bude tie\u017e ve\u013emi lacn\u00e1 (AWS Lambda \u2014 0.2$ \/ 1 mili\u00f3n jednoduch\u00fdch po\u017eiadaviek).<\/p>\n<p>\u0160k\u00e1lovate\u013enos\u0165 tak\u00e9hoto syst\u00e9mu je prakticky ide\u00e1lna \u2014 cloudov\u00fd poskytovate\u013e sa o to postar\u00e1 s\u00e1m, Kubeless sa automaticky prisp\u00f4sobuje v r\u00e1mci klastra Kubernetes.<\/p>\n<p>Existuj\u00fa nedostatky:<\/p>\n<ul>\n<li>v\u00fdvoj ve\u013ek\u00fdch aplik\u00e1ci\u00ed sa st\u00e1va n\u00e1ro\u010dnej\u0161\u00edm<\/li>\n<li>existuj\u00fa \u0165a\u017ekosti s profilovan\u00edm aplik\u00e1ci\u00ed (s\u00fa v\u00e1m k dispoz\u00edcii len logy, ale nie profilovanie v obvyklom zmysle)<\/li>\n<li>ch\u00fdba verzionovanie<\/li>\n<\/ul>\n<p>\nPoviem \u00faprimne, o Serverless som po\u010dul u\u017e pred nieko\u013ek\u00fdmi rokmi, ale v\u0161etky tie roky som nevedel, ako ho spr\u00e1vne aplikova\u0165. Po prezent\u00e1cii Ruslana som za\u010dal ch\u00e1pa\u0165, a po predn\u00e1\u0161ke Nikolaja Sver\u010dkovu (Evil Martians) z backendovej sekcie som si to upevnil. U\u017e som ne\u0161iel na konferenciu zbyto\u010dne \ud83d\ude42<\/p>\n<h4>CI pre chudobn\u00fdch, alebo m\u00e1 zmysel p\u00edsa\u0165 vlastn\u00fd CI pre webov\u00fa \u0161t\u00fadiu<\/h4>\n<p>\nMikhail Radionov, ved\u00faci webovej \u0161t\u00fadie Flag z Jekaterinburgu, hovoril o vlastnom CI\/CD.<\/p>\n<p>Jeho \u0161t\u00fadia pre\u0161la cestou od \u201emanu\u00e1lneho CI\/CD\u201c (prihlasoval sa na server cez SSH, vykonal git pull, opakoval 100-kr\u00e1t za de\u0148) k Jenkins a vlastn\u00e9mu n\u00e1stroju, ktor\u00fd umo\u017e\u0148uje kontrolova\u0165 k\u00f3d a vykon\u00e1va\u0165 releasy pod n\u00e1zvom Pullkins.<\/p>\n<p>Pre\u010do Jenkins nesedel? Ned\u00e1val dostatok flexibility a bol pr\u00edli\u0161 zlo\u017eit\u00fd na prisp\u00f4sobenie.<\/p>\n<p>\u201eFlag\u201c vyv\u00edja na Laraveli (PHP framework). Pri v\u00fdvoji CI\/CD servera vyu\u017eil Michal so svojimi kolegami vstavan\u00e9 mechanizmy Laravelu s n\u00e1zvami Telescope a Envoy. V\u00fdsledkom je server na PHP (v\u0161imnite si), ktor\u00fd spracov\u00e1va prich\u00e1dzaj\u00face webhook po\u017eiadavky, dok\u00e1\u017ee vykon\u00e1va\u0165 zostavenia frontend a backend, deployova\u0165 na r\u00f4zne servery a reportova\u0165 na Slack.<\/p>\n<p>\u010ealej pre mo\u017enos\u0165 vykon\u00e1va\u0165 blue\/green deploy a ma\u0165 jednotn\u00e9 nastavenia v dev-stage-prod prostrediach pre\u0161li na Docker. V\u00fdhody zostali rovnak\u00e9, pridali sa mo\u017enosti homogeniz\u00e1cie prostredia a bezprobl\u00e9mov\u00e9ho deployovania, a pribudla potreba \u0161tudova\u0165 Docker pre spr\u00e1vnu pr\u00e1cu s n\u00edm.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/michaelradionov\/pullkins\">Projekt je na Githube.<\/a><\/noindex><\/p>\n<h4>Ako sme zn\u00ed\u017eili po\u010det rollbackov serverov\u00fdch release-ov o 99%.<\/h4>\n<p>\nPosledn\u00fa predn\u00e1\u0161ku v sekcii Devops mal Viktor Jerem\u010denko, ved\u00faci devops in\u017einier v Miro.com (b\u00fdval\u00fd RealTimeBoard).<\/p>\n<p>V z\u00e1klade RealTimeBoard, hlavn\u00e9ho produktu t\u00edmu Miro, je monolitn\u00e1 aplik\u00e1cia na Jave. Zostavova\u0165, testova\u0165 a deployova\u0165 ju bez prestojov je n\u00e1ro\u010dn\u00e1 \u00faloha. Rovnako je d\u00f4le\u017eit\u00e9 vykon\u00e1va\u0165 deploy takej verzie k\u00f3du, ktor\u00fa netreba rollbackova\u0165 (predsa len je to \u0165a\u017ek\u00fd monolit).<\/p>\n<p>Na ceste k vybudovaniu syst\u00e9mu, ktor\u00fd to umo\u017e\u0148uje, Miro pre\u0161lo cestou, ktor\u00e1 zah\u0155\u0148ala pr\u00e1cu na architekt\u00fare, pou\u017e\u00edvan\u00fdch n\u00e1strojoch (Atlassian Bamboo, Ansible, a pod.) a pr\u00e1cu na budovan\u00ed t\u00edmov (ich ich teraz m\u00e1 vy\u010dlenen\u00fd devops t\u00edm + ve\u013ea samostatn\u00fdch Scrum t\u00edmov z r\u00f4znych profilov v\u00fdvoj\u00e1rov).<\/p>\n<p>Cesta bola \u0165a\u017ek\u00e1 a trnist\u00e1, a Viktor sa podelil o nakopen\u00fa boles\u0165 a nepretr\u017eit\u00fd optimizmus.<\/p>\n<p><img decoding=\"async\" alt=\"DUMP conference | grep \u2018backend|devops\u2019\" src=\"\/wp-content\/uploads\/2019\/04\/ba6b7fe73d6a5f6bd3c5a372137aaac3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Vyhral knihu za ot\u00e1zky.<\/i><\/p>\n<h2>Backend sekcia.<\/h2>\n<p>\nStihol som 2 predn\u00e1\u0161ky \u2014 od Nikolaja Sver\u010dkov\u00e9ho (Evil Martians), tie\u017e o Serverless, a od Grigorija Ko\u0161e\u013eova (spolo\u010dnos\u0165 Kontur) o telemetrii.<\/p>\n<h4>Serverless pre oby\u010dajn\u00fdch smrte\u013en\u00edkov.<\/h4>\n<p>\nAk Ruslan Sirkin hovoril o tom, \u010do je Serverless, Nikolaj uk\u00e1zal jednoduch\u00e9 aplik\u00e1cie vyu\u017e\u00edvaj\u00face Serverless a porozpr\u00e1val o detailoch, ktor\u00e9 ovplyv\u0148uj\u00fa cenu a r\u00fdchlos\u0165 fungovania aplik\u00e1ci\u00ed v AWS Lambda.<\/p>\n<p>Zauj\u00edmav\u00fd detail: minim\u00e1lny \u00fa\u010dtovan\u00fd prvok \u2014 128 Mb pam\u00e4te a 100 ms CPU, stoj\u00ed 0,000000208$. Pri tom 1 mili\u00f3n tak\u00fdchto po\u017eiadaviek mesa\u010dne je zadarmo.<\/p>\n<p>Niektor\u00e9 funkcie Nikolaja \u010dasto prekra\u010dovali limit 100 ms (hlavn\u00e1 aplik\u00e1cia bola nap\u00edsan\u00e1 v Ruby), tak\u017ee prepisovanie na Go prinieslo v\u00fdborn\u00e9 \u00faspory.<\/p>\n<h4>Vostok Hercules \u2014 urobte telemetriu op\u00e4\u0165 skvelou!<\/h4>\n<p>\nPosledn\u00e1 spr\u00e1va sekcie Backend od Grigorija Ko\u0161elevu (firma Kontur) o telemetrii. Telemetria s\u00fa logy, metriky, trasovania aplik\u00e1ci\u00ed.<\/p>\n<p>Kontur na to pou\u017e\u00edva vlastn\u00e9 n\u00e1stroje, zverejnen\u00e9 na Github. N\u00e1stroj z prezent\u00e1cie \u2014 Hercules, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/vostok\/hercules\">github.com\/vostok\/hercules<\/a><\/noindex>, sa pou\u017e\u00edva na doru\u010dovanie telemetrick\u00fdch d\u00e1t.<\/p>\n<p>Vo vyst\u00fapen\u00ed Vladimira Lilu v sekcii Devops bola predmetom diskusie skladovanie a spracovanie logov v Elasticsearch, ale existuje aj \u00faloha doru\u010di\u0165 logy z mnoh\u00fdch tis\u00edcok zariaden\u00ed a aplik\u00e1ci\u00ed, na \u010do s\u00fa ur\u010den\u00e9 n\u00e1stroje typu Vostok Hercules.<\/p>\n<p>Kontur pre\u0161iel zn\u00e1mych cestou \u2014 od RabbitMQ k Apache Kafka, ale nie je to tak\u00e9 jednoduch\u00e9 )) Museli do sch\u00e9my prida\u0165 Zookeeper, Cassandru a Graphite. Inform\u00e1cie z tejto prezent\u00e1cie kompletn\u00e9 neprezrad\u00edm (nie je to moja \u0161pecializ\u00e1cia), ak v\u00e1s zauj\u00edma \u2014 m\u00f4\u017eete po\u010dka\u0165 na slajdy a video na str\u00e1nke konferencie.<\/p>\n<h2>Ako sa to porovn\u00e1va s in\u00fdmi konferenciami?<\/h2>\n<p>\nNem\u00f4\u017eem porovn\u00e1va\u0165 s konferenciami v Moskve a SPb, m\u00f4\u017eem porovna\u0165 s in\u00fdmi podujatiami na Urale a s 404fest v Samare.<\/p>\n<p>DAMP sa kon\u00e1 v 8 sekci\u00e1ch, \u010do je rekord pre uralsk\u00e9 konferencie. Ve\u013emi ve\u013ek\u00e9 sekcie Science a Mana\u017ement, to je tie\u017e nezvy\u010dajn\u00e9. Publiko v Jekaterinburgu je dos\u0165 \u0161trukt\u00farovan\u00e9 \u2014 v meste s\u00fa ve\u013ek\u00e9 v\u00fdvojov\u00e9 oddelenia Yandex, Kontur, Tinkoff, to sa prejavuje aj na prezent\u00e1ci\u00e1ch.<\/p>\n<p>E\u0161te jeden zauj\u00edmav\u00fd moment \u2014 mnoh\u00e9 firmy maj\u00fa hne\u010f 3-4 predn\u00e1\u0161aj\u00facich na konferencii (tak to bolo u Konturu, Evil Martians, Tinkoff). Mnoh\u00e9 z nich boli sponzormi, ale prezent\u00e1cie boli na rovnakej \u00farovni ako ostatn\u00e9, to neboli reklamn\u00e9 vyst\u00fapenia.<\/p>\n<p>\u00cds\u0165 alebo ne\u00eds\u0165? Ak \u017eijete na Urale alebo v bl\u00edzkosti, m\u00e1te mo\u017enos\u0165 a t\u00e9my s\u00fa v\u00e1m zauj\u00edmav\u00e9 \u2014 \u00e1no, samozrejme. Ak uva\u017eujete o dlh\u0161ej ceste \u2014 pozrel by som si t\u00e9my predn\u00e1\u0161ok a vide\u00e1 vyst\u00fapen\u00ed z predch\u00e1dzaj\u00facich rokov. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/user\/videoitpeople\/videos\">www.youtube.com\/user\/videoitpeople\/videos<\/a><\/noindex> a prij\u00edmal rozhodnutie.<br \/>\nE\u0161te jeden plus konferenci\u00ed v regi\u00f3noch, zvy\u010dajne \u2014 \u013eahko sa m\u00f4\u017eete porozpr\u00e1va\u0165 so predn\u00e1\u0161aj\u00facim po prezent\u00e1ci\u00e1ch, jednoducho je menej uch\u00e1dza\u010dov o tak\u00e9to stretnutia.<\/p>\n<p><img decoding=\"async\" alt=\"DUMP conference | grep \u2018backend|devops\u2019\" src=\"\/wp-content\/uploads\/2019\/04\/0b60db17e153e0720a763e9f5faa6544.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n\u010eakujem DAMP-u a Jekaterinburgu! )<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 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438. \u041d\u0438\u043a\u043e\u043b\u0430\u0439 \u0421\u0432\u0435\u0440\u0447\u043a\u043e\u0432 \u0438\u0437 Evil Martians \u043e Serverless \u0427\u0442\u043e \u0442\u0430\u043c \u0431\u044b\u043b\u043e \u0432\u043e\u043e\u0431\u0449\u0435? \u0412\u0441\u0435\u0433\u043e \u043d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 \u0431\u044b\u043b\u043e 8 \u0441\u0435\u043a\u0446\u0438\u0439: Backend, Frontend, Mobile, \u0422\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0438 QA, Devops, 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