{"id":79546,"date":"2020-04-28T07:42:04","date_gmt":"2020-04-28T05:42:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/moj-opyt-i-sovety-po-sdache-ekzamena-certified-kubernetes-application-developer-ckad"},"modified":"2020-04-28T07:42:04","modified_gmt":"2020-04-28T05:42:04","slug":"moj-opyt-i-sovety-po-sdache-ekzamena-certified-kubernetes-application-developer-ckad","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/moj-opyt-i-sovety-po-sdache-ekzamena-certified-kubernetes-application-developer-ckad","title":{"rendered":"Minu kogemus ja soovitused Certified Kubernetes Application Developer (CKAD) eksami sooritamiseks","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Minu kogemus ja soovitused Certified Kubernetes Application Developer (CKAD) eksami sooritamiseks\" src=\"\/wp-content\/uploads\/2020\/04\/f13cb68bc221b3208ed0af093706df03.png\" style=\"display:block;margin: 0 auto;\" \/>Hiljuti sooritasin \u00fchitulemuse eksami Certified Kubernetes Application Developer (CKAD) ja sain sertifikaadi. T\u00e4na tahan r\u00e4\u00e4kida sertifitseerimisprotsessist ja sellest, kuidas ma selleks ette valmistusin. See oli minu jaoks huvitav kogemus eksami sooritamiseks veebis eksamivalvuri range j\u00e4relevaate all. Siin ei ole v\u00e4\u00e4rtuslikku tehnilist teavet, artikkel on puhtalt narratiivne. Samuti ei olnud mul suurt tausta Kubernetesega t\u00f6\u00f6tamisel ja ma ei valmistanud end kolleegidega ette, \u00f5ppisin ja treenisin \u00fcksi oma vabast ajast.<\/p>\n<p>Olen veebiarenduse valdkonnas veel piisavalt uus, kuid m\u00f5istsin kohe, et ilma v\u00e4hemalt elementaarsete Docker ja K8s teadmisteta kaugele ei j\u00f5ua. Kursuse l\u00e4bimine ja sellise eksami ettevalmistamine tundusid mulle heaks sissejuhatuseks konteinerite maailma ja nende orkestreerimisse.<\/p>\n<p>Kui sa ikka veel arvad, et Kubernetes on liiga keeruline ja see ei ole sinu jaoks, siis vaata edasi.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Mis see on?<\/h3>\n<p>\nCloud Native Computing Foundationilt (CNCF) on olemas kaks t\u00fc\u00fcpi Kubernetes sertifitseerimist:<\/p>\n<ul>\n<li>Kuberneetsi rakenduste sertifitseeritud arendaja (CKAD) \u2014 testib oskust projekteerida, luua, seadistada ja avaldada pilvep\u00f5hiseid rakendusi Kubernetese jaoks. Eksam kestab 2 tundi, sisaldab 19 \u00fclesannet ja sooritusl\u00e4vi on 66%. N\u00f5utakse \u00fcsna pinnapealseid teadmisi p\u00f5hielementidest. Hind $300.<\/li>\n<li>Kuberneetsi administraatori sertifitseeritud (CKA) \u2014 testib oskusi, teadmisi ja p\u00e4devust Kubernetese administraatori \u00fclesannete t\u00e4itmisel. Eksam kestab 3 tundi, sisaldab 24 \u00fclesannet ja sooritusl\u00e4vi on 74%. N\u00f5utakse s\u00fcgavamate teadmist s\u00fcsteemide ehitamisest ja seadistamisest. Hind on samuti $300.<\/li>\n<\/ul>\n<p>\nCKAD ja CKA sertifitseerimisprogrammid on v\u00e4lja t\u00f6\u00f6tanud Cloud Native Computing Foundation, et laiendada Kubernetese \u00f6kos\u00fcsteemi standardiseeritud koolituse ja sertifitseerimise kaudu. See sihtasutus loodi Google'i ja Linux Foundationi koost\u00f6\u00f6s, kellele Kubernetes kunagi algse tehnoloogilise panusena anti ning keda toetavad sellised ettev\u00f5tted nagu Microsoft, Apple, Facebook, Cisco, Intel, Red Hat ja paljud teised (c) Wiki. <\/p>\n<p><i>L\u00fchidalt \u00f6eldes, need on eksamid 'peamisest organisatsioonist' Kubernetese alal. Muidugi on olemas ka sertifikaate teistelt firmadelt.<\/i><\/p>\n<h3>Miks?<\/h3>\n<p>\nT\u00f5en\u00e4oliselt on see kogu selle idee k\u00f5ige vastuolulisem punkt. Ma ei soovi arendada vaidlust sertifikaatide vajalikkuse \u00fcle, tahan lihtsalt uskuda, et sellise sertifikaadi olemasolu m\u00f5jutab positiivselt minu turuv\u00e4\u00e4rtust. K\u00f5ik on subjektiivne \u2014 kunagi ei tea, mis t\u00e4pselt v\u00f5ib olla murdepunkt, mis aitab t\u00f6\u00f6le saada.<\/p>\n<p><i>PS: uut t\u00f6\u00f6d ma ei otsi, praegu sobib k\u00f5ik\u2026 no, v\u00e4lja arvatud m\u00f5te kolida kuhugi Ameerikasse.<\/i><\/p>\n<h3>Ettevalmistus<\/h3>\n<p>\nCKAD testis on 19 k\u00fcsimust, mis on jaotatud teemade kaupa j\u00e4rgnevatesse osadesse:<\/p>\n<ul>\n<li>13% \u2013 P\u00f5him\u00f5tted <\/li>\n<li>18% \u2013 Konfiguratsioon<\/li>\n<li>10% \u2013 Mitme konteineriga podid<\/li>\n<li>18% \u2013 J\u00e4lgimine<\/li>\n<li>20% \u2013 Podide kujundamine<\/li>\n<li>13% \u2013 Teenused ja v\u00f5rgu\u00fchendus <\/li>\n<li>8% \u2013 Oleku p\u00fcsivus<\/li>\n<\/ul>\n<p>\nUdemy platvormil on lihtsalt imeline kursus \u00fche indiaanlase Mumshad Mannambethi poolt (lingi panen artikli l\u00f5ppu). T\u00f5eliselt kvaliteetne materjal v\u00e4ikese tasu eest. Eriti tore on see, et kursuse k\u00e4igus pakutakse v\u00f5imalust teha praktilisi harjutusi testkeskkonnas, seel\u00e4bi arendate oskust t\u00f6\u00f6tada konsoolis.<\/p>\n<p>L\u00e4bisin kogu kursuse ja tegin \u00e4ra k\u00f5ik praktilised harjutused (loomulikult ei p\u00e4\u00e4senud ma vastuste pealt vaatamisest), ning vahetult enne eksamit vaatasin veel kord k\u00f5ik loengud \u00fcle kiirusel, mis oli kordades suurem, ja tegin uuesti kaks viimast proovieksamit (mock exams). See v\u00f5ttis mul umbes kuu aega rahulikus tempos. Seda materjali oli mul t\u00e4iesti piisavalt, et usaldusv\u00e4\u00e4rselt eksami sooritada, tulemuseks 91%. \u00dches \u00fclesandes tegin kusagil vea (NodePort ei t\u00f6\u00f6tanud), ja m\u00f5nest minutist j\u00e4i puudu, et l\u00f5petada veel \u00fche \u00fclesanne, kus tuli kasutada ConfigMap'i failist, kuigi lahendust ma teadsin.<\/p>\n<h3>Kuidas eksam toimub<\/h3>\n<p>\nEksam toimub brauseris, kaasatud on veebikaamera ja jagatud ekraan. Eksamireeglid n\u00f5uavad, et toas ei oleks k\u00f5rvalisi inimesi. Ma sooritasin eksami ajateljel, mil riigis kehtestati juba isoleerimisre\u017eiim, seega oli minu jaoks oluline leida vaikne ajavahemik, et naine ei siseneks tuppa v\u00f5i laps ei kisaks. Valisin s\u00fcgava \u00f6\u00f6, \u00f5nneks on ajavalik igas maitses saadaval.<\/p>\n<p>Eksami alguses k\u00fcsib eksamineerija, et n\u00e4itaksite oma esmase isikut t\u00f5endava dokumendi, mis sisaldab fotot ja nime (ladina t\u00e4hestikus) \u2014 mul oli selleks v\u00e4lispass, ning p\u00f6\u00f6rake veebikaamera lauale ja tuppa, et veenduda, et seal ei ole k\u00f5rvalisi esemeid.<\/p>\n<p>Eksami ajal on lubatud hoida avatud veel \u00fcks brauseri sakk m\u00f5ne ressursiga: \u200b<noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/\">https:\/\/kubernetes.io\/docs\/<\/a><\/noindex>\u200b, \u200b<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kubernetes\/\">https:\/\/github.com\/kubernetes\/<\/a><\/noindex>\u200b v\u00f5i <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/blog\/\">https:\/\/kubernetes.io\/blog\/<\/a><\/noindex>\u200b. Mul oli selleks dokumentatsioon, mis oli t\u00e4iesti piisav.<\/p>\n<p>Peamises aknas on lisaks \u00fclesannete tekstile, terminalile ja chat-examineerijaga veel m\u00e4rkmike aken, kuhu saab kopeerida olulisi nimesid v\u00f5i k\u00e4sklusi \u2014 paar korda tuli seda kasutada.<\/p>\n<h3>N\u00f5uanded<\/h3>\n<p><\/p>\n<ol>\n<li>Kasutage aliase, et aega s\u00e4\u00e4sta. Siin on, mida mina kasutasin:\n<pre><code class=\"bash\">export ns=default # muutuja nimesse\nalias ku='kubectl' # l\u00fchendame p\u00f5hik\u00e4sku\nalias kun='ku -n=$ns' # kubectl + nimeserver\nalias kudr='kun --dry-run -o=yaml' # v\u00e4ga vajalikud lipud, et genereerida yaml kirjeldus objekti jaoks<\/code><\/pre>\n<\/li>\n<li>Meenutage lipu kombinatsioone k\u00e4sklusele <b>run<\/b>, et kiiresti genereerida yaml erinevate objektide jaoks \u2014 pod\/deploy\/job\/cronjob (kuigi ei pea neid k\u00f5iki p\u00e4he \u00f5ppima, piisab, kui vaatate abi koos lipuga) <b>-h<\/b>):\n<pre><code class=\"bash\">kudr run pod1 --image=nginx --restart=Never &gt; pod1.yaml\nkudr run deploy1 --image=nginx &gt; deploy1.yaml\nkudr run job1 --image=nginx --restart=OnFailure &gt; job1.yaml\nkudr run cronjob1 --image=nginx --restart=OnFailure --schedule=\"*\/1 * * * * \" &gt; cronjob1.yaml<\/code><\/pre>\n<\/li>\n<li>Kasutage l\u00fchendatud ressursinimesid:\n<pre><code class=\"bash\">ku get ns # asemel namespaces\nku get deploy # asemel deployments\nku get pv # asemel persistentvolumes\nku get pvc # asemel persistentvolumeclaims\nku get svc # asemel services\n# jne, t\u00e4ieliku nimekirja saad vaadata k\u00e4suga:\nkubectl api-resources<\/code><\/pre>\n<\/li>\n<li>Jagage oma aega \u00f5igesti, \u00e4rge j\u00e4\u00e4ge kinni \u00fchele asjale, vahetage k\u00fcsimusi ja minge edasi. Alguses arvasin, et l\u00f5petan \u00fclesanded v\u00e4ga kiiresti ja l\u00f5petan eksami varem, kuid l\u00f5puks ei j\u00f5udnud kahe \u00fclesande l\u00f5pule viia. Tegelikult on eksamile m\u00e4\u00e4ratud aeg napilt ning k\u00f5ik 2 tundi m\u00f6\u00f6duvad pinges.<\/li>\n<li>\u00c4rge unustage konteksti vahetada \u2014 igas \u00fclesandes on antud k\u00e4sk vahetuse tegemiseks, et t\u00f6\u00f6tada soovitud klastris. <br \/>\nJ\u00e4lgige ka n\u00e4\u00e4msp\u00e4\u00e4si. Selle jaoks kasutasin veel \u00fcht n\u00e4puharjutust:<\/p>\n<pre><code class=\"bash\">alias kun='echo namespace=$ns &amp;&amp; ku -n=$ns' # iga k\u00e4su t\u00e4itmisel kuvati esimeses reas minu praegune n\u00e4\u00e4msp\u00e4is<\/code><\/pre>\n<\/li>\n<li>\u00c4rge kiirustage sertifitseerimise eest tasuma, oodake sooduskuponge. Kursuse autor saadab sageli e-postiga 20-30% allahindluse sooduskoodid.<\/li>\n<li>\u00d5ppige l\u00f5puks vim'i kasutama \ud83d\ude42<\/li>\n<\/ol>\n<p><\/p>\n<h3>Lingid:<\/h3>\n<p><\/p>\n<ol>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.cncf.io\/certification\/ckad\/\">www.cncf.io\/certification\/ckad<\/a><\/noindex> \u2014 see on tegelikult sertifitseerimise leht<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.udemy.com\/course\/certified-kubernetes-application-developer\/\">www.udemy.com\/course\/certified-kubernetes-application-developer<\/a><\/noindex> \u2014 v\u00e4ga hea kursus ettevalmistamiseks, k\u00f5ik on selge ja illustreeritud<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/lucassha\/CKAD-resources\">github.com\/lucassha\/CKAD-resources<\/a><\/noindex> \u2014 kasulikud lingid ja m\u00e4rkmed eksami kohta<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/flant\/blog\/425683\/\">habr.com\/ru\/company\/flant\/blog\/425683<\/a><\/noindex> \u2014 kolleegide jagatud lugu Habr'st keerulisema CKA eksami sooritamisest<\/li>\n<\/ol>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/499182\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0432\u0441\u0435\u043c \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u044f \u0443\u0441\u043f\u0435\u0448\u043d\u043e \u0441\u0434\u0430\u043b \u044d\u043a\u0437\u0430\u043c\u0435\u043d Certified Kubernetes Application Developer (CKAD) \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u043b \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u0445\u043e\u0447\u0443 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u0442\u044c \u043e \u0441\u0430\u043c\u043e\u0439 \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440\u0435 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0438 \u043e \u0442\u043e\u043c, \u043a\u0430\u043a \u044f \u043a \u043d\u0435\u0439 \u0433\u043e\u0442\u043e\u0432\u0438\u043b\u0441\u044f. \u0414\u043b\u044f \u043c\u0435\u043d\u044f \u044d\u0442\u043e \u0431\u044b\u043b \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b\u0439 \u043e\u043f\u044b\u0442 \u0441\u0434\u0430\u0447\u0438 \u044d\u043a\u0437\u0430\u043c\u0435\u043d\u0430 \u043e\u043d\u043b\u0430\u0439\u043d \u043f\u043e\u0434 \u043f\u0440\u0438\u0441\u0442\u0430\u043b\u044c\u043d\u044b\u043c \u043d\u0430\u0431\u043b\u044e\u0434\u0435\u043d\u0438\u0435\u043c \u044d\u043a\u0437\u0430\u043c\u0435\u043d\u0430\u0442\u043e\u0440\u0430. \u0422\u0443\u0442 \u043d\u0435 \u0431\u0443\u0434\u0435\u0442 \u0446\u0435\u043d\u043d\u043e\u0439 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438, \u0441\u0442\u0430\u0442\u044c\u044f \u0438\u043c\u0435\u0435\u0442 \u0441\u0443\u0433\u0443\u0431\u043e \u043f\u043e\u0432\u0435\u0441\u0442\u0432\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440. \u0422\u0430\u043a\u0436\u0435 \u0443 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":79547,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-79546","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u043e\u0432\u0441\u0435\u043c \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u044f 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