{"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\/pl\/blog\/administrirovanie\/obzor-vozmozhnostej-kubespray-otlichie-originalnoj-versii-i-nashego-forka","title":{"rendered":"\u00abPrzegl\u0105d mo\u017cliwo\u015bci Kubespray\u00bb: R\u00f3\u017cnica mi\u0119dzy oryginaln\u0105 wersj\u0105 a naszym forkiem","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>23 wrze\u015bnia 20:00 CEST Sergey Bondariew poprowadzi darmowy webinar \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\">Przegl\u0105d mo\u017cliwo\u015bci Kubespray<\/a><\/noindex>\u201d, w kt\u00f3rym opowie, jak przygotowuje si\u0119 kubespray, aby dzia\u0142a\u0142 szybko, efektywnie i niezawodnie.<\/p>\n<p><\/p>\n<p>Sergey Bondariew om\u00f3wi r\u00f3\u017cnice mi\u0119dzy oryginaln\u0105 wersj\u0105 a naszym forkiem:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"\u00abPrzegl\u0105d mo\u017cliwo\u015bci Kubespray\u00bb: R\u00f3\u017cnica mi\u0119dzy oryginaln\u0105 wersj\u0105 a naszym forkiem\" 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>R\u00f3\u017cnica mi\u0119dzy oryginaln\u0105 wersj\u0105 a naszym forkiem. <\/p>\n<p><\/p>\n<p>Ci, kt\u00f3rzy ju\u017c spotkali si\u0119 z kubespray, pewnie teraz si\u0119 zastanawiaj\u0105, dlaczego przeciwstawiam kubeadm kubespray, skoro kubespray s\u0142u\u017cy do tworzenia klastr\u00f3w, a na pierwszy rzut oka wygl\u0105da jak skrypt do instalacji pakiet\u00f3w i automatyzacji uruchamiania.<\/p>\n<p><\/p>\n<p>Ale tak nie zawsze by\u0142o, pierwotnie kubespray instalowa\u0142 wszystkie komponenty samodzielnie:<\/p>\n<p><\/p>\n<ul>\n<li>tworzy\u0142 klaster etcd;<\/li>\n<li>instalowa\u0142 kubelety, generowa\u0142 certyfikaty, konfiguracje i tokeny dost\u0119pu dla statycznych pod\u00f3w kontrolera oraz innych komponent\u00f3w pomocniczych;<\/li>\n<li>tworzy\u0142 konta serwisowe dla w\u0119z\u0142\u00f3w roboczych i \u0142\u0105czy\u0142 je z klastrem.<\/li>\n<\/ul>\n<p><\/p>\n<p>Jednak w poprzednim roku zrezygnowali z tej funkcjonalno\u015bci, zostawiaj\u0105c jedynie kubeadm. Kt\u00f3ry w tamtym czasie nie by\u0142 najlepszy. By\u0142o mi przykro, wi\u0119c stworzy\u0142em m\u00f3j fork, w kt\u00f3rym zachowa\u0142em klasyczny tryb instalacji, a teraz utrzymuj\u0119 ten fork w aktualnym stanie, cherry-pickuj\u0105c commity z oryginalnego kubespray do siebie. Po drodze dostosowuj\u0105c klasyczny tryb do nowych zmian.<\/p>\n<p><\/p>\n<p>W rezultacie r\u00f3\u017cnica mi\u0119dzy klastrami utworzonymi przez m\u00f3j fork a oryginalnym to kube-proxy i czas wa\u017cno\u015bci certyfikat\u00f3w.<\/p>\n<p><\/p>\n<p>W moim forku wszystko pozosta\u0142o tak, jak by\u0142o wcze\u015bniej \u2014 kube-proxy uruchamia si\u0119 jako statyczny pod, certyfikaty s\u0105 wydawane na 100 lat.<\/p>\n<p><\/p>\n<p>W Kubeadm kube-proxy uruchamia si\u0119 jako daemonset, a certyfikaty s\u0105 wydawane na 1 rok i musz\u0105 by\u0107 okresowo odnawiane. Kubeadm w ko\u0144cu nauczy\u0142 si\u0119 to robi\u0107 jednym poleceniem.<\/p>\n<p><\/p>\n<p>R\u00f3\u017cnica jest niewielka, i obecnie u\u017cywamy obu wariant\u00f3w.<\/p>\n<p><\/p>\n<p>Cechy (niedogodno\u015bci) przy przemys\u0142owej eksploatacji:<\/p>\n<p><\/p>\n<p>Scenariusz jest uniwersalny, wi\u0119c nie jest zbyt szybki. W\u0142asny mo\u017cna znacznie przyspieszy\u0107, eliminuj\u0105c kontrole i uruchamiaj\u0105c si\u0119 z gotowego obrazu.<\/p>\n<p><\/p>\n<p>Scenariusz jest skomplikowany, s\u0105 nielogiczne miejsca, ci\u0119\u017ckie dziedzictwo legacy. Instalacja dodatkowych kontroler\u00f3w i oprogramowania przez Kubespraja \u2014 dobra do nauki i test\u00f3w. W produkcji poleganie na Kubespraju nie jest najlepszym pomys\u0142em, a aktualizacja oprogramowania realizowana jest metod\u0105 \"zabi\u0142-zrobi\u0142 nowy\" \u2014 co oznacza przerw\u0119 w serwisie.<\/p>\n<p><\/p>\n<p>Mo\u017cna dodawa\u0107 tylko w\u0119z\u0142y robocze, z masterami s\u0105 pewne niuanse z certyfikatami, a scenariusz nie pokrywa wszystkich potencjalnych problem\u00f3w, kt\u00f3re mog\u0105 wyst\u0105pi\u0107.<\/p>\n<p><\/p>\n<p>Na przyk\u0142ad mia\u0142em problem z kubeadm, gdy pada\u0142 w momencie dodawania drugiego i trzeciego mastera, a po tym Kubespray wykonywa\u0142 kubeadm reset na w\u0119\u017ale i pr\u00f3bowa\u0142 doda\u0107 mastera jeszcze raz.<\/p>\n<p><\/p>\n<p>Problem by\u0142 w tym, \u017ce w momencie awarii drugi instancja etcd zd\u0105\u017cy\u0142 si\u0119 zarejestrowa\u0107, wi\u0119c po jego usuni\u0119ciu po resecie otrzymali\u015bmy koszmar - klaster etcd z dw\u00f3ch w\u0119z\u0142\u00f3w, z kt\u00f3rych jeden zosta\u0142 usuni\u0119ty, a drugi ju\u017c nie akceptuje klient\u00f3w. W rezultacie klaster umar\u0142, nie zd\u0105\u017caj\u0105c si\u0119 narodzi\u0107.<\/p>\n<p><\/p>\n<p>Open source taki, jaki jest.<\/p>\n<p><\/p>\n<p>Wszystko to i wiele wi\u0119cej na bezp\u0142atnym webinarze \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\">Przegl\u0105d mo\u017cliwo\u015bci Kubespray<\/a><\/noindex>23 wrze\u015bnia o 20:00 czasu moskiewskiego. <\/p>\n<p><\/p>\n<p>Do\u0142\u0105cz!<\/p>\n<p>\u0179r\u00f3d\u0142o: <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 5.0.1.1 - 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\" 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