{"id":89143,"date":"2020-07-19T07:42:22","date_gmt":"2020-07-19T05:42:22","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/avtogeneracziya-sekretov-v-helm"},"modified":"2020-07-19T07:42:22","modified_gmt":"2020-07-19T05:42:22","slug":"avtogeneracziya-sekretov-v-helm","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/administrirovanie\/avtogeneracziya-sekretov-v-helm","title":{"rendered":"Autogeneriranje tajni u Helmu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Autogeneriranje tajni u Helmu\" src=\"\/wp-content\/uploads\/2020\/07\/e2ba6ab1bf5b50c7cfcbf62d56ff15da.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Komanda <noindex><a rel=\"nofollow\" href=\"https:\/\/mcs.mail.ru\/containers\/\">Kubernetes aaS od Mail.ru<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/workfloplus\/reusing-auto-generated-helm-secrets-a7426403d4bb\">prevela kratku bilje\u0161ku<\/a><\/noindex> o tome kako automatski generirati tajne Helm prilikom a\u017euriranja. U nastavku slijedi tekst autora \u010dlanka \u2014 tehni\u010dkog direktora Intoware, tvrtke koja razvija SaaS rje\u0161enja. <\/p>\n<p>Kontejneri su super. Isprva sam bio protivnik kontejnera (sram me priznati), ali sada potpuno podr\u017eavam kori\u0161tenje te tehnologije. Ako ovo \u010ditate, nadam se da ste uspje\u0161no plovili morima Dockera, prepoznali prednosti Kubernetesa i olak\u0161ali si \u017eivot s Helm-om.<\/p>\n<p>Ipak, neke stvari su o\u010dito slo\u017eenije nego \u0161to bi trebale biti.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nKako automatski generirati tajne prilikom a\u017euriranja?<\/p>\n<p>Tajna Kubernetesa je resurs koji sadr\u017ei parove klju\u010d\/vrijednost koje \u017eelite koristiti u svom kodu. To mogu biti veze za bazu podataka, lozinke za e-po\u0161tu i sli\u010dno. Kori\u0161tenjem tajni stvarate jasno razdvajanje izme\u0111u koda i postavki, \u0161to omogu\u0107uje jednostavno prilago\u0111avanje razli\u010ditih implementacija bez promjene osnovne kodne baze.<\/p>\n<p>\u010cesta situacija je kada dva modula trebaju komunicirati putem zajedni\u010dkog klju\u010da. Nitko izvan klastera ne bi trebao znati taj klju\u010d, jer je namijenjen komunikaciji \"od jednog do drugog\" unutar klastera.<\/p>\n<h2>Kreiranje tajni<\/h2>\n<p>\nObi\u010dno, da biste kreirali tajnu u Helmu, trebate:<\/p>\n<ul>\n<li>opisati tajnu u datoteci vrijednosti;<\/li>\n<li>prepisati je tijekom deploya;<\/li>\n<li>pozvati je unutar deploya\/podra;<\/li>\n<li>\u2026 profit!<\/li>\n<\/ul>\n<p>\nObi\u010dno to izgleda otprilike ovako:<\/p>\n<pre><code class=\"plaintext\">apiVersion: v1\nkind: Secret\nmetadata:\n  name: my-super-awesome-api-key\ntype: Opaque\nstringData:\n  apiKey: {{ .Values.MyApiKeySecret | quote }}\n<\/code><\/pre>\n<p>\n<i>Jednostavna tajna Kubernetesa, koriste\u0107i vrijednosti iz values.yml<\/i><\/p>\n<p>Ali, pretpostavimo da ne \u017eelite navesti svoju tajnu u datoteci vrijednosti.<\/p>\n<p>Postoji mnogo opcija kada implementacija zahtijeva zajedni\u010dki klju\u010d, koji se mora generirati tijekom instalacije.<\/p>\n<p>U gornjem primjeru komunikacije izme\u0111u modula nije po\u017eeljno dijeliti tajnu izvan implementacije. Stoga je vrlo po\u017eeljno da Helm ima mehanizme za automatsko kreiranje tajne bez potrebe za izravnim navo\u0111enjem.<\/p>\n<h2>Hookovi<\/h2>\n<p>\nHookovi omogu\u0107uju pokretanje koda na odre\u0111enim mjestima tijekom procesa instalacije. Mogu\u0107e je da postoji zadatak konfiguracije koji treba izvr\u0161iti nakon prve instalacije, ili mo\u017eda trebate izvr\u0161iti \u010di\u0161\u0107enje prije bilo koje nadogradnje.<\/p>\n<p>Za rje\u0161avanje na\u0161eg problema s dodavanjem klju\u010da, koji se generira tijekom instalacije, predinstalacijski hookovi su savr\u0161eni. Ali postoji jedan problem: ne mo\u017eete automatski generirati tajnu jednom prilikom nadogradnje. Hookovi \u0107e raditi pri svakoj nadogradnji.<\/p>\n<p>Ako ste generirali svoju tajnu, a va\u0161a prva instalacija jo\u0161 nije obavljena, tada prestanite \u010ditati, predinstalacijski hook \u0107e biti savr\u0161en za vas.<\/p>\n<p>No ako je tajna dio nadogradnje (mo\u017eda nove funkcionalnosti koja nije postojala tijekom instalacije), onda je \u017ealosno \u0161to nije mogu\u0107e stvoriti predinstalacijski hook koji \u0107e raditi samo jedanput.<\/p>\n<h2>Funkcije<\/h2>\n<p>\nHelmove funkcije omogu\u0107uju dodavanje raznih elemenata skripti u skripte za implementaciju.<\/p>\n<pre><code class=\"plaintext\">apiVersion: v1\nkind: Secret\nmetadata:\n  name: my-super-awesome-api-key\ntype: Opaque\nstringData:\n  apiKey: {{ uuidv4 | quote }} #Generirajte novi UUID i citirajte ga\n<\/code><\/pre>\n<p>\nU ovom primjeru prikazano je da \u0107e vrijednost tajne apiKey biti novi UUID, generiran tijekom instalacije.<\/p>\n<p>Helm uklju\u010duje stvarno opse\u017enu knji\u017enicu funkcija, koja koristi nevjerojatne GO predlo\u0161ke i Sprig knji\u017enicu funkcija za izradu prilago\u0111enih implementacija.<\/p>\n<h3>Funkcija Lookup<\/h3>\n<p>\nU Helmu 3.1 dodana je <noindex><a rel=\"nofollow\" href=\"https:\/\/helm.sh\/docs\/chart_template_guide\/functions_and_pipelines\/\">funkcija Lookup<\/a><\/noindex>, koja omogu\u0107uje upit postoje\u0107eg deploya i:<\/p>\n<ul>\n<li>provjeru postojanja resursa;<\/li>\n<li>vratiti vrijednost postoje\u0107eg resursa za daljnju upotrebu.<\/li>\n<\/ul>\n<p>\nKori\u0161tenjem obje ove mogu\u0107nosti mo\u017eemo stvoriti jednokratnu dinami\u010dki generiranu tajnu!<\/p>\n<pre><code class=\"plaintext\"># 1. \u0417\u0430\u043f\u0440\u043e\u0441\u0438\u0442\u044c \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0435\u043a\u0440\u0435\u0442\u0430 \u0438 \u0432\u0435\u0440\u043d\u0443\u0442\u044c \u0432 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 $secret\n{{- $secret := (lookup &quot;v1&quot; &quot;Secret&quot; .Release.Namespace &quot;some-awesome-secret&quot; -}}\napiVersion: v1\nkind: Secret\nmetadata:\n  name: some-awesome-secret\ntype: Opaque\n\n# 2. \u0415\u0441\u043b\u0438 \u0441\u0435\u043a\u0440\u0435\u0442 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442, \u0432\u0437\u044f\u0442\u044c \u0435\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043a\u0430\u043a apiKey (\u0441\u0435\u043a\u0440\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 Base64, \u0442\u0430\u043a \u0447\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435 \u043a\u043b\u044e\u0447 &quot;data&quot;)\n{{ if $secret -}}\ndata:\n  apiKey: {{ $secret.data.apiKey }}\n\n# 3. \u0415\u0441\u043b\u0438 \u0441\u0435\u043a\u0440\u0435\u0442 \u043d\u0435 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u2014 \u0441\u043e\u0437\u0434\u0430\u0442\u044c \u0435\u0433\u043e (\u0432 \u044d\u0442\u043e\u0442 \u0440\u0430\u0437 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435 &quot;stringData&quot;, \u0442\u0430\u043a \u043a\u0430\u043a \u0431\u0443\u0434\u0435\u0442 \u043e\u0431\u044b\u0447\u043d\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435)!\n{{ else -}}\nstringData:\n  apiKey: {{ uuidv4 | quote }}\n{{ end }}\n<\/code><\/pre>\n<p>\nSvaki put kada se nova nadogradnja primijeni na poslu\u017eitelj, Helm \u0107e ili generirati novu vrijednost tajne (ako tajne jo\u0161 nema), ili ponovo upotrijebiti postoje\u0107u vrijednost.<\/p>\n<p>Sretno!<\/p>\n<p><strong>\u0160to jo\u0161 pro\u010ditati o temi<\/strong>:<\/p>\n<ol>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/mcs.mail.ru\/blog\/tri-urovnya-avtomasshtabirovaniya-v-kubernetes-kak-ikh-effektivno-ispolzovat\">Tri razine automatskog skaliranja u Kubernetesu i kako ih u\u010dinkovito koristiti<\/a><\/noindex>.<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/mailru\/blog\/490362\/\">Kubernetes u duhu piratstva s predlo\u0161kom za implementaciju<\/a><\/noindex>.<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/tele.click\/k8s_mail\">Na\u0161 kanal Oko Kubernetesa na Telegramu<\/a><\/noindex>.<\/li>\n<\/ol>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/mailru\/blog\/507376\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u0430\u043d\u0434\u0430 Kubernetes aaS \u043e\u0442 Mail.ru \u043f\u0435\u0440\u0435\u0432\u0435\u043b\u0430 \u043a\u043e\u0440\u043e\u0442\u043a\u0443\u044e \u0437\u0430\u043c\u0435\u0442\u043a\u0443 \u043e \u0442\u043e\u043c, \u043a\u0430\u043a \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0441\u0435\u043a\u0440\u0435\u0442\u044b Helm \u043f\u0440\u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438. \u0414\u0430\u043b\u0435\u0435 \u0442\u0435\u043a\u0441\u0442 \u043e\u0442 \u0430\u0432\u0442\u043e\u0440\u0430 \u0441\u0442\u0430\u0442\u044c\u0438 \u2014 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0434\u0438\u0440\u0435\u043a\u0442\u043e\u0440\u0430 Intoware, \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438-\u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430 SaaS-\u0440\u0435\u0448\u0435\u043d\u0438\u0439. \u041a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u044b \u2014 \u044d\u0442\u043e \u043a\u0440\u0443\u0442\u043e. \u0421\u043d\u0430\u0447\u0430\u043b\u0430 \u044f \u0431\u044b\u043b \u043f\u0440\u043e\u0442\u0438\u0432\u043d\u0438\u043a\u043e\u043c \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432 (\u0441\u0442\u044b\u0434\u043d\u043e \u043f\u0440\u0438\u0437\u043d\u0430\u0442\u044c\u0441\u044f), \u043d\u043e \u0442\u0435\u043f\u0435\u0440\u044c \u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u044d\u0442\u043e\u0439 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438. \u0415\u0441\u043b\u0438 \u0432\u044b \u0447\u0438\u0442\u0430\u0435\u0442\u0435 \u044d\u0442\u043e, \u0442\u043e, \u043d\u0430\u0434\u0435\u044e\u0441\u044c, \u0443\u0441\u043f\u0435\u0448\u043d\u043e \u043f\u043b\u0430\u0432\u0430\u043b\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":89144,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-89143","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=\"\u041a\u043e\u043c\u0430\u043d\u0434\u0430\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/hr\/blog\/administrirovanie\/avtogeneracziya-sekretov-v-helm\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"hr_HR\" \/>\n\t\t<meta 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