{"id":38369,"date":"2019-10-31T22:23:18","date_gmt":"2019-10-31T19:23:18","guid":{"rendered":"https:\/\/prohoster.info\/blog\/anons-veb-interfejsa-kubernetes-web-view-i-kratkij-obzor-drugih-web-ui-dlya-kubernetes\/"},"modified":"2019-10-31T22:23:18","modified_gmt":"2019-10-31T19:23:18","slug":"anons-veb-interfejsa-kubernetes-web-view-i-kratkij-obzor-drugih-web-ui-dlya-kubernetes","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/anons-veb-interfejsa-kubernetes-web-view-i-kratkij-obzor-drugih-web-ui-dlya-kubernetes","title":{"rendered":"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><i><b>Pozn. p\u0159ek.<\/b>: Autorem p\u016fvodn\u00edho materi\u00e1lu je Henning Jacobs ze spole\u010dnosti Zalando. Vytvo\u0159il nov\u00e9 webov\u00e9 rozhran\u00ed pro pr\u00e1ci s Kubernetes, kter\u00e9 je ozna\u010dov\u00e1no jako \u201ekubectl pro web\u201c. Pro\u010d se objevil tento nov\u00fd open source projekt a jak\u00e9 krit\u00e9ria nesplnily ji\u017e existuj\u00edc\u00ed \u0159e\u0161en\u00ed \u2013 \u010dt\u011bte v jeho \u010dl\u00e1nku.<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/82abbfbfaeb30adb000b749cc97809e3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV t\u00e9to publikaci se zab\u00fdv\u00e1m r\u016fzn\u00fdmi open source webov\u00fdmi rozhran\u00edmi Kubernetes, p\u0159edkl\u00e1d\u00e1m sv\u00e9 po\u017eadavky na univerz\u00e1ln\u00ed UI a vysv\u011btluji, pro\u010d jsem je vyvinul <noindex><a rel=\"nofollow\" href=\"https:\/\/codeberg.org\/hjacobs\/kube-web-view\/\">. Autor tohoto \u010dl\u00e1nku a samotn\u00e9ho n\u00e1stroje \u2014 Henning Jacobs ze spole\u010dnosti Zalando \u2014 jej vymezil jako \u201ekubectl pro web\u201c. Cht\u011bl vytvo\u0159it n\u00e1stroj s pohodln\u00fdmi funkcemi pro interakci v r\u00e1mci technick\u00e9 podpory (nap\u0159\u00edklad rychle uk\u00e1zat probl\u00e9m prost\u0159ednictv\u00edm webov\u00e9ho odkazu) a pro reakci na incidenty a hled\u00e1n\u00ed probl\u00e9m\u016f ve v\u00edce klastrech sou\u010dasn\u011b. Jeho d\u00edlo se st\u00e1le vyv\u00edj\u00ed (p\u0159edev\u0161\u00edm d\u00edky samotn\u00e9mu autorovi).<\/a><\/noindex> \u2013 rozhran\u00ed, jeho\u017e c\u00edlem je usnadnit podporu a odstra\u0148ov\u00e1n\u00ed chyb simult\u00e1nn\u011b ve v\u00edce clusterech.<\/p>\n<h2>Pou\u017eit\u00ed<\/h2>\n<p>\nVe spole\u010dnosti Zalando obsluhujeme velk\u00e9 mno\u017estv\u00ed u\u017eivatel\u016f Kubernetes (900+) a cluster\u016f (100+). Existuje n\u011bkolik typick\u00fdch sc\u00e9n\u00e1\u0159\u016f pou\u017eit\u00ed, kdy by velmi pomohlo specializovan\u00e9 webov\u00e9 n\u00e1stroje:<\/p>\n<ol>\n<li> komunikace s kolegy v r\u00e1mci podpory;<\/li>\n<li> reakce na incidenty a vy\u0161et\u0159ov\u00e1n\u00ed jejich p\u0159\u00ed\u010din.<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Podpora<\/h3>\n<p>\nZ m\u00e9 zku\u0161enosti komunikace v r\u00e1mci podpory \u010dasto vypad\u00e1 takto:<\/p>\n<p><i>\u2013 Pomozte, na\u0161e slu\u017eba XYZ nen\u00ed dostupn\u00e1!<br \/>\n\u2013 Co vid\u00edte, kdy\u017e provedete <code>kubectl describe ingress ...<\/code>?<\/i><\/p>\n<p>Nebo n\u011bco podobn\u00e9ho pro CRD:<\/p>\n<p><i>\u2013 M\u00e1m n\u011bjak\u00fd probl\u00e9m se slu\u017ebou identifikace\u2026<br \/>\n\u2013 A co ukazuje p\u0159\u00edkaz <code>kubectl describe platformcredentialsset ...<\/code>?<\/i><\/p>\n<p>Takov\u00e1 komunikace obvykle spo\u010d\u00edv\u00e1 v zad\u00e1v\u00e1n\u00ed r\u016fzn\u00fdch variant p\u0159\u00edkazu <code>kubectl<\/code> s c\u00edlem zjistit probl\u00e9m. V d\u016fsledku toho ob\u011b strany rozhovoru mus\u00ed neust\u00e1le p\u0159ep\u00ednat mezi termin\u00e1lem a webov\u00fdm chatem, nav\u00edc pozoruj\u00ed r\u016fznou situaci.<\/p>\n<p>Proto bych cht\u011bl, aby webov\u00e9 rozhran\u00ed pro Kubernetes umo\u017enilo n\u00e1sleduj\u00edc\u00ed:<\/p>\n<ul>\n<li> u\u017eivatel\u00e9 by mohli <b>sd\u00edlet odkazy<\/b> a vid\u011bt tot\u00e9\u017e;<\/li>\n<li> pom\u00e1halo by <b>vyhnout se lidsk\u00fdm chyb\u00e1m<\/b> v podpo\u0159e: nap\u0159\u00edklad p\u0159ihl\u00e1\u0161en\u00ed do \u0161patn\u00e9ho clusteru v p\u0159\u00edkazov\u00e9m \u0159\u00e1dku, p\u0159eklepy v CLI p\u0159\u00edkazech atd.;<\/li>\n<li> umo\u017e\u0148ovalo by <b>generovat vlastn\u00ed pohledy<\/b> pro zas\u00edl\u00e1n\u00ed koleg\u016fm, tedy p\u0159id\u00e1vat sloupce s etiketami, zobrazovat r\u016fzn\u00e9 typy zdroj\u016f na jedn\u00e9 str\u00e1nce;<\/li>\n<li> v ide\u00e1ln\u00edm p\u0159\u00edpad\u011b by tento webov\u00fd n\u00e1stroj m\u011bl umo\u017e\u0148ovat vytv\u00e1\u0159en\u00ed <b>\u201ehlubok\u00fdch\u201c odkaz\u016f na konkr\u00e9tn\u00ed \u010d\u00e1sti YAML<\/b> (nap\u0159\u00edklad ukazovat na chybn\u00e9 parametry, kter\u00e9 zp\u016fsobuj\u00ed selh\u00e1n\u00ed).<\/li>\n<\/ul>\n<p><\/p>\n<h3>Reakce na incidenty a anal\u00fdza<\/h3>\n<p>\nReakce na incidenty v infrastruktu\u0159e vy\u017eaduje situational awareness, schopnost hodnotit dopady a hledat vzory v klastrech. N\u011bkter\u00e9 p\u0159\u00edklady z re\u00e1ln\u00e9ho \u017eivota:<\/p>\n<ul>\n<li> kritick\u00fd produk\u010dn\u00ed servis m\u00e1 probl\u00e9my a mus\u00edte <b>naj\u00edt v\u0161echny Kubernetes zdroje podle n\u00e1zvu ve v\u0161ech klastrech<\/b>, abyste odstranili z\u00e1vady;<\/li>\n<li> uzly za\u010d\u00ednaj\u00ed padat p\u0159i \u0161k\u00e1lov\u00e1n\u00ed a mus\u00edte <b>naj\u00edt v\u0161echny pod'y se statusem \u201ePending\u201c ve v\u0161ech clusterech<\/b>, abyste posoudili rozsah probl\u00e9mu;<\/li>\n<li> n\u011bkte\u0159\u00ed u\u017eivatel\u00e9 hl\u00e1s\u00ed probl\u00e9m s DaemonSet nasazen\u00fdm ve v\u0161ech klastrech a je t\u0159eba zjistit, <b>zda m\u00e1 probl\u00e9m celoplo\u0161nou povahu<\/b>.<\/li>\n<\/ul>\n<p>\nMoje standardn\u00ed \u0159e\u0161en\u00ed v takov\u00fdch p\u0159\u00edpadech je n\u011bco jako <code>for i in $clusters; do kubectl ...; done<\/code>. Samoz\u0159ejm\u011b je mo\u017en\u00e9 vyvinout n\u00e1stroj, kter\u00fd poskytuje podobn\u00e9 mo\u017enosti.<\/p>\n<h2>Existuj\u00edc\u00ed webov\u00e9 rozhran\u00ed Kubernetes<\/h2>\n<p>\nSv\u011bt open source webov\u00fdch rozhran\u00ed pro Kubernetes nen\u00ed p\u0159\u00edli\u0161 velk\u00fd*, tak\u017ee jsem se pokusil shrom\u00e1\u017edit dal\u0161\u00ed informace pomoc\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/try_except_\/status\/1153543128365850625\">Twitter<\/a><\/noindex>:<\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/75c26a70ec886700db2a81b57d672538.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<i>* Moje vysv\u011btlen\u00ed omezen\u00e9ho po\u010dtu webov\u00fdch rozhran\u00ed pro Kubernetes: cloudov\u00e9 slu\u017eby a dodavatel\u00e9 Kubernetes obvykle nab\u00edzej\u00ed sv\u00e9 vlastn\u00ed frontendov\u00e9 aplikace, tak\u017ee trh pro \u201edobr\u00e1\u201c voln\u00e1 Kubernetes UI je relativn\u011b mal\u00fd.<\/i><\/p>\n<p>D\u00edky tweetu jsem se dozv\u011bd\u011bl o <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/herbrandson\/k8dash\">K8Dash<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/smpio\/kubernator\">Kubernator<\/a><\/noindex> a <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/vmware\/octant\">Octant<\/a><\/noindex>. Pod\u00edvejme se na n\u011b a dal\u0161\u00ed existuj\u00edc\u00ed open source \u0159e\u0161en\u00ed a pokusme se pochopit, co p\u0159edstavuj\u00ed.<\/p>\n<h2>K8Dash<\/h2>\n<p>\n<i>\u201eK8Dash je nejjednodu\u0161\u0161\u00ed zp\u016fsob, jak spravovat Kubernetes cluster.\u201c<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/112e362486a294a1a39706fc32124889.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/herbrandson\/k8dash\">K8Dash<\/a><\/noindex> vypad\u00e1 docela dob\u0159e a rychle funguje, ale m\u00e1 n\u011bkolik nedostatk\u016f pro v\u00fd\u0161e uveden\u00e9 sc\u00e9n\u00e1\u0159e pou\u017eit\u00ed:<\/p>\n<ul>\n<li> Funguje pouze v r\u00e1mci jednoho clusteru.<\/li>\n<li> T\u0159\u00edd\u011bn\u00ed a filtrov\u00e1n\u00ed je mo\u017en\u00e9, ale nem\u00e1 trval\u00e9 odkazy.<\/li>\n<li> Chyb\u00ed podpora Custom Resource Definitions (CRDs).<\/li>\n<\/ul>\n<p><\/p>\n<h2>Kubernator<\/h2>\n<p>\n<i>\u201eKubernator je alternativn\u00ed UI pro Kubernetes. Na rozd\u00edl od vysoce \u00farov\u0148ov\u00e9ho panelu Kubernetes Dashboard poskytuje n\u00edzko\u00farov\u0148ovou kontrolu a skv\u011bl\u00fd p\u0159ehled v\u0161ech objekt\u016f v clusteru s mo\u017enost\u00ed vytv\u00e1\u0159et nov\u00e9, upravovat je a \u0159e\u0161it konflikty. Jako pln\u011b klientsk\u00e1 aplikace (jako kubectl) nevy\u017eaduje \u017e\u00e1dn\u00fd backend krom\u011b samotn\u00e9ho API serveru Kubernetes a zohled\u0148uje pravidla p\u0159\u00edstupu k clusteru.\u201c<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/230115c88206d57443067a5b44ee9f31.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTo je docela p\u0159esn\u00fd popis <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/smpio\/kubernator\">Kubern\u00e1tor<\/a><\/noindex>. Bohu\u017eel mu chyb\u00ed n\u011bkter\u00e9 funkce:<\/p>\n<ul>\n<li> Obsluhuje pouze jeden cluster.<\/li>\n<li> Nen\u00ed k dispozici zobrazen\u00ed v seznamu (tj. nelze vypsat v\u0161echny pod'y se statusem \u201ePending\u201c).<\/li>\n<\/ul>\n<p><\/p>\n<h2>Kubernetes Dashboard<\/h2>\n<p>\n<i>\u201eKubernetes Dashboard je univerz\u00e1ln\u00ed webov\u00e9 rozhran\u00ed pro clustery Kubernetes. Umo\u017e\u0148uje u\u017eivatel\u016fm spravovat aplikace b\u011b\u017e\u00edc\u00ed v clusteru a odstra\u0148ovat jejich pot\u00ed\u017ee, stejn\u011b jako spravovat samotn\u00fd cluster.\u201c<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/10b37d00ed4c6cbb05a0eb9069a4371f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nBohu\u017eel, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/dashboard\">Kubernetes Dashboard<\/a><\/noindex> nen\u00ed p\u0159\u00edli\u0161 u\u017eite\u010dn\u00fd pro m\u00e9 \u010dinnosti v oblasti podpory a reakce na incidenty, proto\u017ee v n\u011bm:<\/p>\n<ul>\n<li> nen\u00ed trval\u00fdch odkaz\u016f, nap\u0159\u00edklad kdy\u017e filtruj\u00ed prost\u0159edky nebo m\u011bn\u00ed po\u0159ad\u00ed t\u0159\u00edd\u011bn\u00ed;<\/li>\n<li> nen\u00ed jednoduch\u00fd zp\u016fsob, jak filtrovat podle stavu \u2014 nap\u0159\u00edklad zobrazit v\u0161echny pod'y se statusem \u201ePending\u201c;<\/li>\n<li> podporov\u00e1n je pouze jeden cluster;<\/li>\n<li> nepodporuj\u00ed se CRD (tato funkce je ve v\u00fdvoji);<\/li>\n<li> neexistuj\u00ed \u017e\u00e1dn\u00e9 vlastn\u00ed sloupce (nap\u0159\u00edklad sloupce s \u0161t\u00edtky typu <code>kubectl -L<\/code>).<\/li>\n<\/ul>\n<p><\/p>\n<h2>Kubernetes Operational View (kube-ops-view)<\/h2>\n<p>\n<i>\u201eSyst\u00e9mov\u00fd panel pro monitorov\u00e1n\u00ed prostoru cluster\u016f K8s.\u201c<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/0d63fcce4d54fbf5b40b15ad195e8ba7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/hjacobs\/kube-ops-view\">Kubernetes Operational View<\/a><\/noindex> zcela jin\u00fd p\u0159\u00edstup: tento n\u00e1stroj pouze zobrazuje uzly clustera a pod'y pomoc\u00ed WebGL, bez jak\u00fdchkoli textov\u00fdch podrobnost\u00ed objekt\u016f. Je skv\u011bl\u00fd pro rychl\u00fd p\u0159ehled stavu clustera (\u201epod'y padaj\u00ed?\u201c)*, ale nen\u00ed vhodn\u00fd pro v\u00fd\u0161e popsan\u00e9 p\u0159\u00edpady pou\u017eit\u00ed v podpo\u0159e a reakci na incidenty.<\/p>\n<p><i>* <b>Pozn. p\u0159ek.<\/b>: V tomto ohledu v\u00e1s m\u016f\u017ee tak\u00e9 zaj\u00edmat n\u00e1\u0161 plugin <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/flant\/grafana-statusmap\">grafana-statusmap<\/a><\/noindex>, o kter\u00e9m jsme psali podrobn\u011bji v <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/flant\/blog\/423851\/\">tomto \u010dl\u00e1nku<\/a><\/noindex>.<\/i><\/p>\n<h2>Kubernetes Resource Report (kube-resource-report)<\/h2>\n<p>\n<i>\u201eShroma\u017e\u010fujte \u00fadaje o po\u017eadavc\u00edch na zdroje pod'\u016f a clustera Kubernetes, porovn\u00e1vejte je s vyu\u017eit\u00edm zdroj\u016f a generujte statick\u00fd HTML\u201c.<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/11e64094ca3fb317959ab03ec7c07e0d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/hjacobs\/kube-resource-report\/\">Kubernetes Resource Report<\/a><\/noindex> vytv\u00e1\u0159\u00ed statick\u00e9 HTML zpr\u00e1vy o vyu\u017e\u00edv\u00e1n\u00ed prost\u0159edk\u016f a rozd\u011blen\u00ed n\u00e1klad\u016f mezi t\u00fdmy\/aplikacemi v clusterech. Zpr\u00e1va je do ur\u010dit\u00e9ho stupn\u011b u\u017eite\u010dn\u00e1 pro podporu a reakci na incidenty, proto\u017ee umo\u017e\u0148uje rychleji naj\u00edt cluster, ve kter\u00e9m je aplikace nasazena.<\/p>\n<p><i><b>Pozn. p\u0159ek.<\/b>: P\u0159i pohledu na \u00fadaje o rozd\u011blen\u00ed prost\u0159edk\u016f a jejich n\u00e1kladech u cloudov\u00fdch poskytovatel\u016f m\u016f\u017ee b\u00fdt tak\u00e9 u\u017eite\u010dn\u00fd servis a n\u00e1stroj <noindex><a rel=\"nofollow\" href=\"https:\/\/kubecost.com\/\">Kubecost<\/a><\/noindex>, jeho\u017e p\u0159ehled jsme <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/flant\/blog\/466659\/\">ned\u00e1vno publikovali<\/a><\/noindex>.<\/i><\/p>\n<h2>Octant<\/h2>\n<p>\n<i>\u201eRoz\u0161i\u0159iteln\u00e1 webov\u00e1 platforma pro v\u00fdvoj\u00e1\u0159e, navr\u017een\u00e1 tak, aby poskytovala lep\u0161\u00ed porozum\u011bn\u00ed slo\u017eitosti cluster\u016f Kubernetes.\u201c<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/0f949ec05a6b403e7093ee38648eb493.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/vmware\/octant\">Octant<\/a><\/noindex>, vytvo\u0159en\u00fd ve VMware, je nov\u00fd produkt, o kter\u00e9m jsem se dozv\u011bd\u011bl pom\u011brn\u011b ned\u00e1vno. Umo\u017e\u0148uje pohodln\u011b prozkoum\u00e1vat klastr na lok\u00e1ln\u00edm stroji (existuj\u00ed dokonce vizualizace), nicm\u00e9n\u011b se do ur\u010dit\u00e9 m\u00edry dot\u00fdk\u00e1 problematiky podpory a reakce na incidenty. Nev\u00fdhody Octantu:<\/p>\n<ul>\n<li> Nen\u00ed vyhled\u00e1v\u00e1n\u00ed v klastra.<\/li>\n<li> Funguje pouze na lok\u00e1ln\u00edm stroji (nen\u00ed nasazov\u00e1n v klastru).<\/li>\n<li> Nen\u00ed mo\u017en\u00e9 t\u0159\u00eddit\/filterovat objekty (podporov\u00e1n je pouze selektor \u0161t\u00edtk\u016f).<\/li>\n<li> Nelze zad\u00e1vat vlastn\u00ed sloupce.<\/li>\n<li> Nelze zobrazit seznam objekt\u016f podle prostor\u016f jmen.<\/li>\n<\/ul>\n<p>\nM\u011bl jsem tak\u00e9 probl\u00e9my s stabilitou Octantu v klastra Zalando: na n\u011bkter\u00fdch CRD <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/vmware\/octant\/issues\/72\">se zhroutil.<\/a><\/noindex>.<\/p>\n<h2>P\u0159edstavuji Kubernetes Web View<\/h2>\n<p>\n<i>\"kubectl pro web.\"<\/i><\/p>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/e7b0eb0650de76516bbe05305b9dea9b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nPo anal\u00fdze dostupn\u00fdch rozhran\u00ed pro Kubernetes jsem se rozhodl vytvo\u0159it nov\u00e9: <noindex><a rel=\"nofollow\" href=\"https:\/\/codeberg.org\/hjacobs\/kube-web-view\/\">. Autor tohoto \u010dl\u00e1nku a samotn\u00e9ho n\u00e1stroje \u2014 Henning Jacobs ze spole\u010dnosti Zalando \u2014 jej vymezil jako \u201ekubectl pro web\u201c. Cht\u011bl vytvo\u0159it n\u00e1stroj s pohodln\u00fdmi funkcemi pro interakci v r\u00e1mci technick\u00e9 podpory (nap\u0159\u00edklad rychle uk\u00e1zat probl\u00e9m prost\u0159ednictv\u00edm webov\u00e9ho odkazu) a pro reakci na incidenty a hled\u00e1n\u00ed probl\u00e9m\u016f ve v\u00edce klastrech sou\u010dasn\u011b. Jeho d\u00edlo se st\u00e1le vyv\u00edj\u00ed (p\u0159edev\u0161\u00edm d\u00edky samotn\u00e9mu autorovi).<\/a><\/noindex>. V\u017edy\u0165 v podstat\u011b pot\u0159ebuji ve\u0161kerou s\u00edlu <code>kubectl<\/code> ve webu, a to konkr\u00e9tn\u011b:<\/p>\n<ul>\n<li> dostupnost v\u0161ech (jen ke \u010dten\u00ed) operac\u00ed, kter\u00e9 u\u017eivatel\u00e9 preferuj\u00ed pou\u017e\u00edvat v kubectl;<\/li>\n<li> v\u0161echny URL by m\u011bly b\u00fdt trval\u00e9 a p\u0159edstavovat str\u00e1nku v origin\u00e1ln\u00edm zn\u011bn\u00ed, aby si je kolegov\u00e9 mohli vym\u011b\u0148ovat a pou\u017e\u00edvat v jin\u00fdch n\u00e1stroj\u00edch;<\/li>\n<li> podpora v\u0161ech objekt\u016f Kubernetes, co\u017e umo\u017en\u00ed \u0159e\u0161it jak\u00fdkoli typ probl\u00e9mu;<\/li>\n<li> seznamy zdroj\u016f by m\u011bly b\u00fdt stahovateln\u00e9 pro dal\u0161\u00ed pr\u00e1ci (v elektronick\u00fdch tabulk\u00e1ch, CLI n\u00e1stroj\u00edch jako <code>grep<\/code>) a ulo\u017een\u00ed (nap\u0159\u00edklad pro postmortemy);<\/li>\n<li> podpora v\u00fdb\u011bru zdroj\u016f podle \u0161t\u00edtk\u016f (podobn\u011b jako <code>kubectl get .. -l<\/code>);<\/li>\n<li> mo\u017enost vytv\u00e1\u0159et kombinovan\u00e9 seznamy r\u016fzn\u00fdch typ\u016f zdroj\u016f (podobn\u011b jako <code>kubectl get all<\/code>) pro z\u00edsk\u00e1n\u00ed celkov\u00e9ho opera\u010dn\u00edho obrazu mezi kolegy (nap\u0159\u00edklad p\u0159i reakci na incident);<\/li>\n<li> mo\u017enost p\u0159id\u00e1vat p\u0159izp\u016fsoben\u00e9 \"inteligentn\u00ed\" hlubok\u00e9 odkazy na dal\u0161\u00ed n\u00e1stroje, jako jsou monitorovac\u00ed panely, loggery, registry aplikac\u00ed atd. pro usnadn\u011bn\u00ed hled\u00e1n\u00ed\/odstra\u0148ov\u00e1n\u00ed chyb a reakci na incidenty;<\/li>\n<li> frontend by m\u011bl b\u00fdt co nejjednodu\u0161\u0161\u00ed (\u010dist\u00fd HTML), aby se p\u0159ede\u0161lo n\u00e1hodn\u00fdm probl\u00e9m\u016fm, nap\u0159\u00edklad zaseknut\u00e9mu JavaScriptu;<\/li>\n<li> podpora mnoha klastr\u016f pro zjednodu\u0161en\u00ed interakce p\u0159i vzd\u00e1len\u00e9m poradenstv\u00ed (nap\u0159\u00edklad zapamatov\u00e1n\u00ed pouze jednoho URL);<\/li>\n<li> pokud mo\u017eno by se m\u011bl zjednodu\u0161it situativn\u00ed rozbor (nap\u0159\u00edklad se odkazy na sta\u017een\u00ed zdroj\u016f ze v\u0161ech klastr\u016f\/prostor\u016f jmen);<\/li>\n<li> dal\u0161\u00ed funkce pro vytv\u00e1\u0159en\u00ed flexibiln\u00edch odkaz\u016f a zv\u00fdrazn\u011bn\u00ed textov\u00fdch informac\u00ed, nap\u0159\u00edklad pro ozna\u010den\u00ed konkr\u00e9tn\u00ed \u010d\u00e1sti v popisu zdroje (\u0159\u00e1dku v YAML);<\/li>\n<li> mo\u017enost p\u0159izp\u016fsoben\u00ed specifick\u00fdm po\u017eadavk\u016fm z\u00e1kazn\u00edka, nap\u0159\u00edklad umo\u017en\u011bn\u00ed vytv\u00e1\u0159en\u00ed speci\u00e1ln\u00edch \u0161ablon zobrazen\u00ed pro CRD, vlastn\u00edch tabulkov\u00fdch zobrazen\u00ed, \u00fapravy CSS styl\u016f;<\/li>\n<li> n\u00e1stroje pro dal\u0161\u00ed studium v p\u0159\u00edkazov\u00e9m \u0159\u00e1dku (nap\u0159\u00edklad ukazuj\u00edc\u00ed kompletn\u00ed p\u0159\u00edkazy <code>kubectl<\/code>, p\u0159ipraven\u00e9 k zkop\u00edrov\u00e1n\u00ed);<\/li>\n<\/ul>\n<p>\nMimo \u00fakoly \u0159e\u0161en\u00e9 v Kubernetes Web View <i>(non-goals)<\/i> z\u016fst\u00e1vaj\u00ed:<\/p>\n<ul>\n<li> abstrahov\u00e1n\u00ed objekt\u016f Kubernetes;<\/li>\n<li> spr\u00e1va aplikac\u00ed (nap\u0159\u00edklad spr\u00e1va deployment\u016f, Helm chart\u016f atd.);<\/li>\n<li> operace z\u00e1pisu (mus\u00ed b\u00fdt prov\u00e1d\u011bny prost\u0159ednictv\u00edm bezpe\u010dn\u00e9ho n\u00e1stroje CI\/CD a\/nebo GitOps);<\/li>\n<li> hezk\u00e9 rozhran\u00ed (JavaScript, motivy atd.);<\/li>\n<li> vizualizace (viz <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/hjacobs\/kube-ops-view\">kube-ops-view<\/a><\/noindex>);<\/li>\n<li> anal\u00fdzu n\u00e1klad\u016f (viz <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/hjacobs\/kube-resource-report\/\">kube-resource-report<\/a><\/noindex>).<\/li>\n<\/ul>\n<p>\nJak Kubernetes Web View pom\u00e1h\u00e1 p\u0159i podpo\u0159e a reakci na incidenty?<\/p>\n<h3>Podpora<\/h3>\n<p><\/p>\n<ul>\n<li> <b>V\u0161echny odkazy jsou trval\u00e9<\/b>, co\u017e usnad\u0148uje sd\u00edlen\u00ed informac\u00ed s kolegy.<\/li>\n<li> Je mo\u017en\u00e9 vytv\u00e1\u0159et <b>sv\u00e1 zobrazen\u00ed<\/b>, nap\u0159\u00edklad vypsat v\u0161echny Deploymenty a Pod'y s ur\u010ditou etiketou ve dvou konkr\u00e9tn\u00edch clusterech (n\u011bkolik n\u00e1zv\u016f cluster\u016f a typ\u016f zdroj\u016f lze zadat v odkazu, odd\u011blen\u00fdch \u010d\u00e1rkami).<\/li>\n<li> M\u016f\u017eete odkazovat na <b>ur\u010dit\u00e9 \u0159\u00e1dky v YAML souboru<\/b> objektu, kter\u00fd ukazuje na potenci\u00e1ln\u00ed probl\u00e9my ve specifikaci objektu.<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/9e0b3ab31181f8d93323c413d9185888.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Hled\u00e1n\u00ed v clusterech v Kubernetes Web View<\/i><\/p>\n<h3>Reakce na incidenty<\/h3>\n<p><\/p>\n<ul>\n<li> <b>Glob\u00e1ln\u00ed hled\u00e1n\u00ed<\/b> <i>(global search)<\/i> umo\u017e\u0148uje hledat objekty ve v\u0161ech clusterech.<\/li>\n<li> <b>Zobrazen\u00ed jako seznamy<\/b> mohou zobrazit v\u0161echny objekty s ur\u010dit\u00fdm stavem\/sloupcem ve v\u0161ech clusterech (nap\u0159\u00edklad pot\u0159ebujeme naj\u00edt v\u0161echny pod'y se statusem \u201ePending\u201c).<\/li>\n<li> <b>Seznamy objekt\u016f lze st\u00e1hnout<\/b> ve form\u00e1tu hodnot odd\u011blen\u00fdch tabul\u00e1tory (TSV) pro n\u00e1slednou anal\u00fdzu.<\/li>\n<li> <noindex><a rel=\"nofollow\" href=\"https:\/\/kube-web-view.readthedocs.io\/en\/latest\/customization.html#external-links\">P\u0159izp\u016fsobiteln\u00e9 extern\u00ed odkazy<\/a><\/noindex> umo\u017e\u0148uj\u00ed p\u0159ep\u00ednat na odpov\u00eddaj\u00edc\u00ed panely sledov\u00e1n\u00ed a dal\u0161\u00ed n\u00e1stroje.<\/li>\n<\/ul>\n<p><img decoding=\"async\" alt=\"Ozn\u00e1men\u00ed o webov\u00e9m rozhran\u00ed Kubernetes Web View (a stru\u010dn\u00fd p\u0159ehled dal\u0161\u00edch webov\u00fdch UI pro Kubernetes)\" src=\"\/wp-content\/uploads\/2019\/09\/ac275aa6b234988f40a2d0cde2ac4870.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Kubernetes Web View: seznam pod'\u016f se statusem \u201ePending\u201c ve v\u0161ech clusterech<\/i><\/p>\n<p>Pokud chcete vyzkou\u0161et Kubernetes Web View, doporu\u010duji se sezn\u00e1mit s <noindex><a rel=\"nofollow\" href=\"https:\/\/kube-web-view.readthedocs.io\/\">dokumentac\u00ed<\/a><\/noindex> nebo se pod\u00edvat na <noindex><a rel=\"nofollow\" href=\"https:\/\/kube-web-view.demo.j-serv.de\/\">\u017eivou demo verzi<\/a><\/noindex>.<\/p>\n<p>Ur\u010dit\u011b by mohl b\u00fdt u\u017eivatelsk\u00fd rozhran\u00ed lep\u0161\u00ed, ale zat\u00edm je Kubernetes Web View n\u00e1strojem pro \"pokro\u010dil\u00e9 u\u017eivatele\", kte\u0159\u00ed se neboj\u00ed ru\u010dn\u011b manipulovat s URL cestami, pokud je to pot\u0159eba. Pokud m\u00e1te jak\u00e9koli p\u0159ipom\u00ednky\/dopln\u011bn\u00ed\/p\u0159\u00e1n\u00ed, pros\u00edm, kontaktujte <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/try_except_\">m\u011b na Twitteru<\/a><\/noindex>!<\/p>\n<p>Tento \u010dl\u00e1nek je kr\u00e1tk\u00fdm vypr\u00e1v\u011bn\u00edm o p\u0159edpokladech, kter\u00e9 vedly ke vzniku Kubernetes Web View. N\u00e1sledovat budou dal\u0161\u00ed! <i>(<b>Pozn. p\u0159ek.<\/b>: O\u010dek\u00e1vejte je <noindex><a rel=\"nofollow\" href=\"https:\/\/srcco.de\/\">na blogu autora<\/a><\/noindex>.)<\/i><\/p>\n<h2>P.S. od p\u0159ekladatele<\/h2>\n<p>\nP\u0159e\u010dt\u011bte si tak\u00e9 n\u00e1\u0161 blog:<\/p>\n<ul>\n<li> \u00ab<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/flant\/blog\/426985\/\">kubebox a dal\u0161\u00ed konzolov\u00e9 shellov\u00e9 aplikace pro Kubernetes<\/a><\/noindex>\u00bb;<\/li>\n<li> \u00ab<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/flant\/blog\/462707\/\">N\u00e1stroje pro v\u00fdvoj\u00e1\u0159e aplikac\u00ed b\u011b\u017e\u00edc\u00edch v Kubernetes<\/a><\/noindex>\u00bb;<\/li>\n<li> \u00ab<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/flant\/news\/t\/467433\/\">Objevila se konzolov\u00e1 utilita kubelive pro interaktivn\u00ed pr\u00e1ci s Kubernetes<\/a><\/noindex>\u00bb;<\/li>\n<li> \u00ab<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/flant\/blog\/330198\/\">U\u017eite\u010dn\u00e9 n\u00e1stroje p\u0159i pr\u00e1ci s Kubernetes<\/a><\/noindex>\u00bb.<\/li>\n<\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/flant\/blog\/468041\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0438\u043c. \u043f\u0435\u0440\u0435\u0432.: \u0410\u0432\u0442\u043e\u0440 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0430 \u2014 Henning Jacobs \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Zalando. \u041e\u043d \u0441\u043e\u0437\u0434\u0430\u043b \u043d\u043e\u0432\u044b\u0439 \u0432\u0435\u0431-\u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 Kubernetes, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043e\u0437\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u00abkubectl \u0434\u043b\u044f \u0432\u0435\u0431\u0430\u00bb. \u041f\u043e\u0447\u0435\u043c\u0443 \u043d\u043e\u0432\u044b\u0439 Open Source-\u043f\u0440\u043e\u0435\u043a\u0442 \u043f\u043e\u044f\u0432\u0438\u043b\u0441\u044f \u0438 \u043a\u0430\u043a\u0438\u043c \u043a\u0440\u0438\u0442\u0435\u0440\u0438\u044f\u043c \u043d\u0435 \u0443\u0434\u043e\u0432\u043b\u0435\u0442\u0432\u043e\u0440\u0438\u043b\u0438 \u0443\u0436\u0435 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u2014 \u0447\u0438\u0442\u0430\u0439\u0442\u0435 \u0432 \u0435\u0433\u043e \u0441\u0442\u0430\u0442\u044c\u0435. \u0412 \u044d\u0442\u043e\u0439 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438 \u044f \u0440\u0430\u0441\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u044e \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0435 \u0432\u0435\u0431-\u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u044b Kubernetes \u0441 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u043c \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u043c \u043a\u043e\u0434\u043e\u043c, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":28800,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-38369","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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