{"id":94812,"date":"2020-09-22T07:42:40","date_gmt":"2020-09-22T05:42:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/obzor-vozmozhnostej-kubespray-otlichie-originalnoj-versii-i-nashego-forka"},"modified":"2020-09-22T07:42:40","modified_gmt":"2020-09-22T05:42:40","slug":"obzor-vozmozhnostej-kubespray-otlichie-originalnoj-versii-i-nashego-forka","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/obzor-vozmozhnostej-kubespray-otlichie-originalnoj-versii-i-nashego-forka","title":{"rendered":"\u201ePreh\u013ead mo\u017enost\u00ed Kubespray\u201c: Rozdiel medzi origin\u00e1lnou verziou a na\u0161\u00edm fork-om","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>23. septembra o 20.00 MSK, Sergej Bondarjev povedie bezplatn\u00fd webin\u00e1r \u201e<noindex><a rel=\"nofollow\" href=\"https:\/\/slurm.io\/webinar-kubespray-overview?utm_source=habr&amp;utm_medium=promo&amp;utm_campaign=webinar_kubsprey_23-09-2020&amp;utm_content=post_17-09-2020&amp;utm_term=dzygovbrodskiy\">Preh\u013ead mo\u017enost\u00ed Kubespray<\/a><\/noindex>\u201c, kde vysvetl\u00ed, ako pripravuj\u00fa kubespray, aby to bolo r\u00fdchle, efekt\u00edvne a odoln\u00e9 vo\u010di zlyhaniu.<\/p>\n<p><\/p>\n<p>Sergej Bondarjev objasn\u00ed rozdiel medzi origin\u00e1lnou verziou a na\u0161\u00edm fork:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"\u201ePreh\u013ead mo\u017enost\u00ed Kubespray\u201c: Rozdiel medzi origin\u00e1lnou verziou a na\u0161\u00edm fork-om\" src=\"\/wp-content\/uploads\/2020\/09\/f45b10f9a5a7c360906ad58e9e643a08.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>Rozdiel medzi origin\u00e1lnou verziou a na\u0161\u00edm fork. <\/p>\n<p><\/p>\n<p>T\u00ed, ktor\u00ed sa u\u017e s kubespray stretli, sa asi teraz zam\u00fd\u0161\u013eaj\u00fa, pre\u010do protire\u010d\u00edm kubeadm kubesprayu, ve\u010f kubespray na vytvorenie klastru skuto\u010dne vy\u017eaduje kubeadm, a na prv\u00fd poh\u013ead to vyzer\u00e1 ako skript na in\u0161tal\u00e1ciu bal\u00edkov a automatizovan\u00e9 spustenie.<\/p>\n<p><\/p>\n<p>Ale tak to v\u017edy nebolo, p\u00f4vodne kubespray in\u0161taloval v\u0161etky komponenty s\u00e1m:<\/p>\n<p><\/p>\n<ul>\n<li>zhroma\u017e\u010foval klaster etcd;<\/li>\n<li>in\u0161taloval kubelet, generoval certifik\u00e1ty, konfigur\u00e1cie a pr\u00edstupov\u00e9 tokeny pre statick\u00e9 pody kontroln\u00e9ho pl\u00e1\u0161\u0165a a \u010fal\u0161\u00edch servisn\u00fdch komponentov;<\/li>\n<li>vytv\u00e1ral servisn\u00e9 \u00fa\u010dty pre pracovn\u00e9 uzly a prip\u00e1jal ich do klastru.<\/li>\n<\/ul>\n<p><\/p>\n<p>Ale predminul\u00fd rok tento funk\u010dn\u00fd prvok odstr\u00e1nili, pri\u010dom zostal len kubeadm, ktor\u00fd vtedy nebol ve\u013emi dobr\u00fd. Bolo mi to \u013e\u00fato, a tak som vytvoril svoj fork, v ktorom som zachoval klasick\u00fd re\u017eim in\u0161tal\u00e1cie, a vlastne ho teraz udr\u017eiavam aktu\u00e1lny, cherry-pickuj\u00fac commity z origin\u00e1lneho kubespray pre seba. Z\u00e1rove\u0148 doladujem klasick\u00fd re\u017eim pod\u013ea nov\u00fdch zmien.<\/p>\n<p><\/p>\n<p>Nakoniec, rozdiel medzi klastrami, vytvoren\u00fdmi moj\u00edm forkom a origin\u00e1lom, je kube-proxy a doby platnosti certifik\u00e1tov.<\/p>\n<p><\/p>\n<p>V mojom forku zostalo v\u0161etko, ako to bolo predt\u00fdm \u2014 kube-proxy sa sp\u00fa\u0161\u0165a ako statick\u00fd pod, certifik\u00e1ty s\u00fa vystaven\u00e9 na 100 rokov.<\/p>\n<p><\/p>\n<p>V Kubeadm sa kube-proxy sp\u00fa\u0161\u0165a ako daemonset a certifik\u00e1ty s\u00fa vystaven\u00e9 na 1 rok, a musia sa pravidelne predl\u017eova\u0165. Kubeadm sa kone\u010dne nau\u010dil to robi\u0165 jedn\u00fdm pr\u00edkazom.<\/p>\n<p><\/p>\n<p>Rozdiel je mal\u00fd, a dnes pou\u017e\u00edvame oba varianty.<\/p>\n<p><\/p>\n<p>Vlastnosti (nedostatky) pri priemyseln\u00fdch aplik\u00e1ci\u00e1ch:<\/p>\n<p><\/p>\n<p>Scen\u00e1r je univerz\u00e1lny, preto nie je ve\u013emi r\u00fdchly. Vlastn\u00fd projekt mo\u017eno v\u00fdrazne ur\u00fdchli\u0165, ak sa odstr\u00e1nia kontroly a spust\u00ed sa z hotov\u00e9ho obrazu.<\/p>\n<p><\/p>\n<p>Scen\u00e1r je zlo\u017eit\u00fd, s\u00fa tam nelogick\u00e9 miesta, \u0165a\u017ek\u00e9 dedi\u010dstvo legacy. In\u0161tal\u00e1cia dodato\u010dn\u00fdch kontrol\u00e9rov a softv\u00e9ru prostredn\u00edctvom kubespraya \u2014 je dobr\u00e1 na \u0161kolenie a testovanie. V produk\u010dnej prev\u00e1dzke z\u00e1visie\u0165 od kubespraya nie je ve\u013emi rozumn\u00fd n\u00e1pad, plus aktualiz\u00e1cia softv\u00e9ru je realizovan\u00e1 met\u00f3dou \"zabil-urobil nov\u00fd\" \u2014 znamen\u00e1 to preru\u0161enie v obslu\u017enom servise.<\/p>\n<p><\/p>\n<p>M\u00f4\u017ee prid\u00e1va\u0165 len pracovn\u00e9 uzly, s master uzlami s\u00fa ur\u010dit\u00e9 nuansy oh\u013eadom certifik\u00e1tov, a sc\u00e9nar nepracuje so v\u0161etk\u00fdmi mo\u017en\u00fdmi probl\u00e9mami, ktor\u00e9 m\u00f4\u017eu vznikn\u00fa\u0165.<\/p>\n<p><\/p>\n<p>Napr\u00edklad, mala som probl\u00e9m s kubeadm, ke\u010f zlyhal v okamihu prid\u00e1vania druh\u00e9ho a tretieho mastera, a po tom kubespray vykonal kubeadm reset na uzle a pok\u00fasil sa prida\u0165 master znova.<\/p>\n<p><\/p>\n<p>Probl\u00e9m bol v\u0161ak v tom, \u017ee k okamihu zlyhania sa u\u017e druh\u00fd in\u0161tanc etctd stihol registrova\u0165, a ke\u010f\u017ee bol tie\u017e odstr\u00e1nen\u00fd po resete, dostali sme no\u010dn\u00fa moru \u2014 etcd klaster z dvoch uzlov, z ktor\u00fdch jeden bol odstr\u00e1nen\u00fd a druh\u00fd u\u017e nep prij\u00edma klientov. Nakoniec klaster zomrel, ani sa nenarodil.<\/p>\n<p><\/p>\n<p>Opensource tak, ako je.<\/p>\n<p><\/p>\n<p>To v\u0161etko a ove\u013ea viac na bezplatnom webin\u00e1ri \u201e<noindex><a rel=\"nofollow\" href=\"https:\/\/slurm.io\/webinar-kubespray-overview?utm_source=habr&amp;utm_medium=promo&amp;utm_campaign=webinar_kubsprey_23-09-2020&amp;utm_content=post_17-09-2020&amp;utm_term=dzygovbrodskiy\">Preh\u013ead mo\u017enost\u00ed Kubespray<\/a><\/noindex>\u201c 23. septembra o 20.00 MSK. <\/p>\n<p><\/p>\n<p>Pridajte sa!<\/p>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/519890\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>23 \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044f 20.00 \u041c\u0421\u041a \u0421\u0435\u0440\u0433\u0435\u0439 \u0411\u043e\u043d\u0434\u0430\u0440\u0435\u0432 \u043f\u0440\u043e\u0432\u0435\u0434\u0451\u0442 \u0431\u0435\u0441\u043f\u043b\u0430\u0442\u043d\u044b\u0439 \u0432\u0435\u0431\u0438\u043d\u0430\u0440 \u00ab\u041e\u0431\u0437\u043e\u0440 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439 Kubespray\u00bb, \u0433\u0434\u0435 \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0435\u0442, \u043a\u0430\u043a \u0433\u043e\u0442\u043e\u0432\u044f\u0442 kubespray, \u0447\u0442\u043e\u0431\u044b \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u043e\u0441\u044c \u0431\u044b\u0441\u0442\u0440\u043e, \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e \u0438 \u043e\u0442\u043a\u0430\u0437\u043e\u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u043e. \u0421\u0435\u0440\u0433\u0435\u0439 \u0411\u043e\u043d\u0434\u0430\u0440\u0435\u0432 \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0435\u0442 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0438 \u043d\u0430\u0448\u0435\u0433\u043e \u0444\u043e\u0440\u043a\u0430: \u041e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0438 \u043d\u0430\u0448\u0435\u0433\u043e \u0444\u043e\u0440\u043a\u0430. \u0422\u0435, \u043a\u0442\u043e \u0441 \u043a\u0443\u0431\u0441\u043f\u0440\u0435\u0435\u043c \u0443\u0436\u0435 \u0441\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u043b\u0441\u044f, \u043d\u0430\u0432\u0435\u0440\u043d\u043e\u0435 \u0441\u0435\u0439\u0447\u0430\u0441 \u043d\u0435\u0434\u043e\u0443\u043c\u0435\u0432\u0430\u044e\u0442, \u043f\u043e\u0447\u0435\u043c\u0443 \u044f kubeadm \u043f\u0440\u043e\u0442\u0438\u0432\u043e\u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e \u043a\u0443\u0431\u0441\u043f\u0440\u0435\u044e, \u0432\u0435\u0434\u044c \u043a\u0443\u0431\u0441\u043f\u0440\u0435\u0439 \u0434\u043b\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":94813,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-94812","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"23 \u0441\u0435\u043d\u0442\u044f\u0431\u0440\u044f 20.00 \u041c\u0421\u041a \u0421\u0435\u0440\u0433\u0435\u0439 \u0411\u043e\u043d\u0434\u0430\u0440\u0435\u0432 \u043f\u0440\u043e\u0432\u0435\u0434\u0451\u0442 \u0431\u0435\u0441\u043f\u043b\u0430\u0442\u043d\u044b\u0439 \u0432\u0435\u0431\u0438\u043d\u0430\u0440 \u00ab\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link 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