{"id":76047,"date":"2020-03-30T19:42:04","date_gmt":"2020-03-30T17:42:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-kubernetes-1-18-sistemy-upravleniya-klasterom-izolirovannyh-kontejnerov"},"modified":"2020-03-30T19:42:04","modified_gmt":"2020-03-30T17:42:04","slug":"vypusk-kubernetes-1-18-sistemy-upravleniya-klasterom-izolirovannyh-kontejnerov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-kubernetes-1-18-sistemy-upravleniya-klasterom-izolirovannyh-kontejnerov","title":{"rendered":"Verze Kubernetes 1.18, syst\u00e9mu pro spr\u00e1vu cluster\u016f izolovan\u00fdch kontejner\u016f","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/blog\/2020\/03\/25\/kubernetes-1-18-release-announcement\/\">Byl zve\u0159ejn\u011bn<\/a><\/noindex> uvoln\u011bn\u00ed platformy pro orchestraci kontejner\u016f <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/\">Kubernetes 1.18<\/a><\/noindex>, kter\u00e1 umo\u017e\u0148uje \u0159\u00eddit cluster izolovan\u00fdch kontejner\u016f jako celek a poskytuje mechanismy pro nasazen\u00ed, \u00fadr\u017ebu a \u0161k\u00e1lov\u00e1n\u00ed aplikac\u00ed b\u011b\u017e\u00edc\u00edch v kontejnerech. Projekt byl p\u016fvodn\u011b vytvo\u0159en spole\u010dnost\u00ed Google, ale pot\u00e9 byl p\u0159eveden na nez\u00e1vislou platformu podporovanou organizac\u00ed Linux Foundation. Platforma je prezentov\u00e1na jako komunitn\u00ed \u0159e\u0161en\u00ed, kter\u00e9 nen\u00ed v\u00e1z\u00e1no na konkr\u00e9tn\u00ed syst\u00e9my a m\u016f\u017ee fungovat s jak\u00fdmikoli aplikacemi v jak\u00fdchkoli cloudov\u00fdch prost\u0159ed\u00edch. K\u00f3d Kubernetes je naps\u00e1n v Go a <noindex><a rel=\"nofollow\" href=\"http:\/\/github.com\/kubernetes\/kubernetes\">distribuov\u00e1no<\/a><\/noindex> pod licenc\u00ed Apache 2.0. <\/p>\n<p>poskytuje funkce pro nasazen\u00ed a spr\u00e1vu infrastruktury, jako je spr\u00e1va DNS, vyva\u017eov\u00e1n\u00ed z\u00e1t\u011b\u017ee,<br \/>\nrozlo\u017een\u00ed kontejner\u016f mezi uzly clusteru (migrov\u00e1n\u00ed kontejner\u016f v z\u00e1vislosti na zm\u011bn\u00e1ch z\u00e1t\u011b\u017ee a pot\u0159eb\u00e1ch slu\u017eeb), kontrola funk\u010dnosti na \u00farovni aplikac\u00ed, spr\u00e1va \u00fa\u010dt\u016f, aktualizace a dynamick\u00e9 \u0161k\u00e1lov\u00e1n\u00ed b\u011b\u017e\u00edc\u00edho clusteru bez jeho zastaven\u00ed. Je mo\u017en\u00e9 nasazen\u00ed skupin kontejner\u016f s prov\u00e1d\u011bn\u00edm operac\u00ed aktualizac\u00ed a vr\u00e1cen\u00ed zm\u011bn najednou pro celou skupinu, stejn\u011b jako logick\u00e9 rozd\u011blen\u00ed clusteru na \u010d\u00e1sti s odd\u011blen\u00edm zdroj\u016f. Podporov\u00e1na je dynamick\u00e1 migrace aplikac\u00ed, pro ukl\u00e1d\u00e1n\u00ed jejich dat mohou b\u00fdt pou\u017eity jak lok\u00e1ln\u00ed \u00falo\u017ei\u0161t\u011b, tak s\u00ed\u0165ov\u00e9 \u00falo\u017en\u00e9 syst\u00e9my. <\/p>\n<p>Verze Kubernetes 1.18 obsahuje 38 zm\u011bn a vylep\u0161en\u00ed, z nich\u017e 15 bylo p\u0159evedeno do stabiln\u00edho stavu a 11 do beta stavu. 12 nov\u00fdch zm\u011bn bylo navr\u017eeno v alfa stavu. P\u0159i p\u0159\u00edprav\u011b nov\u00e9 verze byly ve\u0161ker\u00e9 \u00fasil\u00ed zam\u011b\u0159eny jak na vylep\u0161en\u00ed r\u016fzn\u00fdch funkc\u00ed a stabilizaci experiment\u00e1ln\u00edch mo\u017enost\u00ed, tak na p\u0159id\u00e1n\u00ed nov\u00fdch v\u00fdvoj\u016f. Hlavn\u00ed zm\u011bny:<\/p>\n<ul>\n<li class=\"l\"> Kubectl\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/blob\/master\/keps\/sig-cli\/20190805-kubectl-debug.md\">Byla p\u0159id\u00e1na<\/a><\/noindex> Alpha verze p\u0159\u00edkazu &#171;kubectl debug&#187;, kter\u00fd usnad\u0148uje lad\u011bn\u00ed v podech spu\u0161t\u011bn\u00edm efem\u00e9rn\u00edch kontejner\u016f s n\u00e1stroji pro lad\u011bn\u00ed.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/blob\/master\/keps\/sig-cli\/20200115-kubectl-diff.md\">Byla ozn\u00e1mena stabiln\u00ed verze<\/a><\/noindex> P\u0159\u00edkaz &#171;kubectl diff&#187;, kter\u00fd umo\u017e\u0148uje zjistit, co se zm\u011bn\u00ed v clusteru, pokud se aplikuje manifest.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/kubernetes\/pull\/87077\">Byly odstran\u011bny<\/a><\/noindex> V\u0161echny gener\u00e1tory p\u0159\u00edkazu &#171;kubectl run&#187;, krom\u011b gener\u00e1toru spu\u0161t\u011bn\u00ed jednotliv\u00e9ho podu.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/kubernetes\/pull\/87580\">Zm\u011bnili jsme<\/a><\/noindex> P\u0159\u00edznak &#171;&#8212;dry-run&#187;, v z\u00e1vislosti na jeho hodnot\u011b (client, server a none) provede zku\u0161ebn\u00ed vykon\u00e1n\u00ed p\u0159\u00edkazu na stran\u011b klienta nebo serveru.\n<li class=\"l\"> K\u00f3d kubectl <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/blob\/master\/keps\/sig-cli\/kubectl-staging.md\">byl odd\u011blen<\/a><\/noindex> do samostatn\u00e9ho repozit\u00e1\u0159e. To umo\u017enilo odd\u011blit kubectl od intern\u00edch z\u00e1vislost\u00ed kubernetes a usnadnilo import k\u00f3du do extern\u00edch projekt\u016f.\n<\/ul>\n<li class=\"l\"> Ingress\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/758\">Za\u010dalo<\/a><\/noindex> zm\u011bna skupiny API pro Ingress na networking.v1beta1.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/blob\/master\/keps\/sig-network\/20190125-ingress-api-group.md\">Byly p\u0159id\u00e1ny<\/a><\/noindex> nov\u00e9 \u0159\u00e1dky:\n<ul>\n<li> pathType, co\u017e umo\u017e\u0148uje ur\u010dit zp\u016fsob, jak\u00fdm bude cesta porovn\u00e1v\u00e1na v po\u017eadavku\n<li> IngressClassName &#8212; n\u00e1hrada za anotaci kubernetes.io\/ingress.class, kter\u00e1 byla ozna\u010dena za deprecated. V tomto poli se uv\u00e1d\u00ed n\u00e1zev speci\u00e1ln\u00edho objektu IngressClass.\n<\/ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/concepts\/services-networking\/ingress\/#ingress-class\">P\u0159id\u00e1no<\/a><\/noindex> objekt IngressClass, ve kter\u00e9m se uv\u00e1d\u00ed n\u00e1zev ingresses kontrol\u00e9ru, jeho dal\u0161\u00ed parametry a znak pou\u017eit\u00ed jako v\u00fdchoz\u00ed\n<\/ul>\n<li class=\"l\"> Slu\u017eba\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/concepts\/services-networking\/service\/#application-protocol\">Bylo p\u0159id\u00e1no<\/a><\/noindex> pole AppProtocol, ve kter\u00e9m lze uv\u00e9st, jak\u00fd protokol pou\u017e\u00edv\u00e1 aplikace\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/concepts\/services-networking\/endpoint-slices\/\">Byl p\u0159eveden<\/a><\/noindex> do stavu beta a zahrnut jako v\u00fdchoz\u00ed EndpointSlicesAPI, kter\u00fd je funk\u010dn\u011bj\u0161\u00ed n\u00e1hradou za b\u011b\u017en\u00e9 Endpoints.\n<\/ul>\n<li class=\"l\"> S\u00ed\u0165\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/508\">Podpora<\/a><\/noindex> IPv6 byl p\u0159eveden do stavu beta.\n<\/ul>\n<li class=\"l\"> Trval\u00e9 disky. Byla ozna\u010dena za stabiln\u00ed n\u00e1sleduj\u00edc\u00ed funkcionalita:\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/989\">Klonov\u00e1n\u00ed PVC<\/a><\/noindex>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/features\/issues\/351\">Pou\u017eit\u00ed nes\u00ed\u0165ov\u00fdch block raw za\u0159\u00edzen\u00ed jako trval\u00fdch disk\u016f<\/a><\/noindex>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/565\">Podpora block raw za\u0159\u00edzen\u00ed v CSI<\/a><\/noindex>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/603\">P\u0159ed\u00e1n\u00ed informac\u00ed o podu, kter\u00fd po\u017eadoval p\u0159ipojen\u00ed disku, do CSI ovlada\u010de<\/a><\/noindex>\n<\/ul>\n<li class=\"l\"> Konfigurace aplikace\n<ul>\n<li class=\"l\">  Do objekt\u016f ConfigMap a Secret <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/reference\/generated\/kubernetes-api\/v1.18\/#configmap-v1-core\">bylo p\u0159id\u00e1no<\/a><\/noindex> Nov\u00e9 pole &#171;immutable&#187;. Nastaven\u00ed hodnoty pole na true zakazuje zm\u011bnu objektu.\n<\/ul>\n<li class=\"l\"> Pl\u00e1nova\u010d\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/blob\/master\/keps\/sig-scheduling\/20200114-multi-scheduling-profiles.md\">Byla p\u0159id\u00e1na<\/a><\/noindex> Mo\u017enost vytv\u00e1\u0159et dal\u0161\u00ed profily pro kube-scheduler. Pokud bylo d\u0159\u00edve nutn\u00e9 spou\u0161t\u011bt dal\u0161\u00ed samostatn\u00e9 pl\u00e1nova\u010de pro realizaci nestandardn\u00edch algoritm\u016f rozd\u011blov\u00e1n\u00ed pod\u016f, nyn\u00ed je mo\u017en\u00e9 vytvo\u0159it dal\u0161\u00ed sady nastaven\u00ed pro standardn\u00ed pl\u00e1nova\u010d a uv\u00e9st jeho n\u00e1zev ve stejn\u00e9m poli podu &#171;.spec.schedulerName&#187;. Stav &#8212; alfa.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/concepts\/configuration\/taint-and-toleration\/#taint-based-evictions\">Taint Based Eviction<\/a><\/noindex> byl ozna\u010den za stabiln\u00ed\n<\/ul>\n<li class=\"l\"> \u0160k\u00e1lov\u00e1n\u00ed\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/blob\/master\/keps\/sig-autoscaling\/20190307-configurable-scale-velocity-for-hpa.md\">Byla p\u0159id\u00e1na<\/a><\/noindex> mo\u017enost uv\u00e9st v manifestu HPA \u00farove\u0148 agresivity p\u0159i zm\u011bn\u011b po\u010dtu spu\u0161t\u011bn\u00fdch pod\u016f, tedy p\u0159i zv\u00fd\u0161en\u00ed z\u00e1t\u011b\u017ee spou\u0161t\u011bt okam\u017eit\u011b Nkr\u00e1t v\u00edce instanc\u00ed.\n<\/ul>\n<li class=\"l\"> Kubelet\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/nolancon\/website\/blob\/f4200307260ea3234540ef13ed80de325e1a7267\/content\/en\/docs\/tasks\/administer-cluster\/topology-manager.md\">Topology Manager<\/a><\/noindex> obdr\u017eel status beta. Funkce zahrnuje NUMA rozlo\u017een\u00ed, co\u017e umo\u017e\u0148uje vyhnout se degradaci v\u00fdkonu na v\u00edcena\u010delov\u00fdch syst\u00e9mech.\n<li class=\"l\"> Status beta <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/concepts\/configuration\/pod-overhead\/\">obdr\u017eela<\/a><\/noindex>  Funkce PodOverhead, kter\u00e1 umo\u017e\u0148uje v RuntimeClass specifikovat dodate\u010dn\u00e9 mno\u017estv\u00ed zdroj\u016f pot\u0159ebn\u00fdch pro spu\u0161t\u011bn\u00ed podu.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/1539\">Roz\u0161\u00ed\u0159ena<\/a><\/noindex> podpora HugePages, v alfa stavu byla p\u0159id\u00e1na izolace na \u00farovni kontejneru a podpora v\u00edce velikost\u00ed hugepages.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/kubernetes\/pull\/86282\">Odstran\u011bn<\/a><\/noindex> endpoint pro metriky \/metrics\/resource\/v1alpha1, m\u00edsto toho se pou\u017e\u00edv\u00e1 \/metrics\/resource\n<\/ul>\n<li class=\"l\"> API\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/kubernetes\/pull\/85903\">Nakonec<\/a><\/noindex> byla odstran\u011bna mo\u017enost pou\u017e\u00edvat zastaral\u00e9 API skupiny apps\/v1beta1 a extensions\/v1beta1.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/reference\/using-api\/api-concepts\/#server-side-apply\">ServerSide Apply<\/a><\/noindex> Zv\u00fd\u0161en do stavu beta2. Toto vylep\u0161en\u00ed p\u0159esouv\u00e1 manipulaci s objekty z kubectl do API serveru. Auto\u0159i vylep\u0161en\u00ed tvrd\u00ed, \u017ee to umo\u017en\u00ed opravit mnoho st\u00e1vaj\u00edc\u00edch chyb, kter\u00e9 nelze opravit v sou\u010dasn\u00e9 situaci. Tak\u00e9 p\u0159idali sekci &#171;.metadata.managedFields&#187;, ve kter\u00e9 navrhuj\u00ed uchov\u00e1vat historii zm\u011bn objektu, s ozna\u010den\u00edm kdo, kdy a co p\u0159esn\u011b zm\u011bnil.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/blob\/master\/keps\/sig-auth\/20190607-certificates-api.md\">Byl ozn\u00e1men<\/a><\/noindex> stabiln\u00ed CertificateSigningRequest API.\n<\/ul>\n<li class=\"l\"> Podpora platformy Windows.\n<ul>\n<li class=\"l\"> Pokra\u010duje v roz\u0161i\u0159ov\u00e1n\u00ed podpora Windows nodu. Byly p\u0159id\u00e1ny alfa verze:\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/1001\">Podpora CRI-Containerd<\/a><\/noindex>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/1301\">Implementace RuntimeClass<\/a><\/noindex>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/1122\">CSI proxy<\/a><\/noindex>\n<\/ul>\n<li class=\"l\"> Byla p\u0159evedena podpora\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/689\">Group Managed Service Account<\/a><\/noindex>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/issues\/1043\">RunAsUserName<\/a><\/noindex>\n<\/ul>\n<\/ul>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52635\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u043e\u0440\u043a\u0435\u0441\u0442\u0440\u043e\u0432\u043a\u0438 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432 Kubernetes 1.18, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043a\u0430\u043a \u0435\u0434\u0438\u043d\u044b\u043c \u0446\u0435\u043b\u044b\u043c \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u0442\u044c \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u043e\u043c \u0438\u0437 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432 \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0439 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b \u0434\u043b\u044f \u0440\u0430\u0437\u0432\u0451\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u044f, \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0438 \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0445 \u0432 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u0430\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. \u041f\u0440\u043e\u0435\u043a\u0442 \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u0431\u044b\u043b \u0441\u043e\u0437\u0434\u0430\u043d \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Google, \u043d\u043e \u0437\u0430\u0442\u0435\u043c \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0451\u043d \u043d\u0430 \u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u0443\u044e \u043f\u043b\u043e\u0449\u0430\u0434\u043a\u0443, \u043a\u0443\u0440\u0438\u0440\u0443\u0435\u043c\u0443\u044e \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0435\u0439 Linux Foundation. \u041f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430 \u043f\u043e\u0437\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0435 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e\u043c \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u043e\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0435, \u043d\u0435 \u043f\u0440\u0438\u0432\u044f\u0437\u0430\u043d\u043d\u043e\u0435 \u043a \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u043c 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