{"id":38312,"date":"2019-10-31T22:22:55","date_gmt":"2019-10-31T19:22:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/prostoj-i-bezopasnyj-sposob-avtomatizatsii-kanareechnyh-deploev-s-pomoshhyu-helm\/"},"modified":"2019-10-31T22:22:55","modified_gmt":"2019-10-31T19:22:55","slug":"prostoj-i-bezopasnyj-sposob-avtomatizatsii-kanareechnyh-deploev-s-pomoshhyu-helm","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/administrirovanie\/prostoj-i-bezopasnyj-sposob-avtomatizatsii-kanareechnyh-deploev-s-pomoshhyu-helm","title":{"rendered":"Ett enkelt och s\u00e4kert s\u00e4tt att automatisera kanardeploys med Helm","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Ett enkelt och s\u00e4kert s\u00e4tt att automatisera kanardeploys med Helm\" src=\"\/wp-content\/uploads\/2019\/09\/255c7f20fb17c079b8a59ced9c092088.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nEn kanariedeplyering \u00e4r en mycket effektiv metod f\u00f6r att testa ny kod p\u00e5 en delm\u00e4ngd av anv\u00e4ndarna. Den minskar betydligt den trafikbelastning som kan orsaka problem under distributionen, eftersom den endast sker inom en specifik undergrupp. Denna anteckning handlar om hur man organiserar en s\u00e5dan deployment med hj\u00e4lp av Kubernetes och automatisering. <i>Det f\u00f6ruts\u00e4tts att du har en viss kunskap om Helm och Kubernetes-resurser.<\/i>. <br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Ett enkelt och s\u00e4kert s\u00e4tt att automatisera kanardeploys med Helm\" src=\"\/wp-content\/uploads\/2019\/09\/e8501460ddbfe797d036a399680032c1.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nEn enkel kanariedeplyering i Kubernetes omfattar tv\u00e5 nyckelresurser: sj\u00e4lva tj\u00e4nsten och verktyget f\u00f6r distribution. Kanariedeplyeringen fungerar via en tj\u00e4nst som interagerar med tv\u00e5 olika resurser som hanterar trafikuppdateringen. En av dessa resurser kommer att hantera den 'kanariegula' versionen, medan den andra kommer att hantera den stabila versionen. I denna situation kan vi reglera m\u00e4ngden kanariegula versioner f\u00f6r att minska m\u00e4ngden trafik som beh\u00f6ver hanteras. Om du till exempel f\u00f6redrar att anv\u00e4nda Yaml, kommer det att se ut i Kubernetes s\u00e5 h\u00e4r: <\/p>\n<pre><code class=\"xml\">kind: Deployment\nmetadata:\n  name: app-canary\n  labels:\n    app: app\nspec:\n  replicas: 1\n  ...\n    image: myapp:canary\n---\nkind: Deployment\nmetadata:\n  name: app\n  labels:\n    app: app\nspec:\n  replicas: 5\n  ...\n    image: myapp:stable\n---\nkind: Service\nselector:\n  app: app # Selektorn kommer att dirigera trafik till b\u00e5da distributionerna.<\/code><\/pre>\n<p>\nDet \u00e4r \u00e4nnu enklare att f\u00f6rest\u00e4lla sig ett s\u00e5dant alternativ med kubectl, och i <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\/docs\/concepts\/cluster-administration\/manage-deployment\/#canary-deployments\">dokumentationen f\u00f6r Kubernetes<\/a><\/noindex> finns faktiskt en fullst\u00e4ndig handledning f\u00f6r detta scenario. Men den centrala fr\u00e5gan i detta inl\u00e4gg handlar om hur vi planerar att automatisera denna process med hj\u00e4lp av Helm. <\/p>\n<h3>Automatisering av kanariedeplyering <\/h3>\n<p>\nF\u00f6rst och fr\u00e4mst beh\u00f6ver vi ett Helm-diagram som redan inkluderar de resurser vi diskuterade ovan. Det ska se ut ungef\u00e4r s\u00e5 h\u00e4r:<\/p>\n<pre><code class=\"xml\">~\\\/charts\\\/app\n\u251c\u2500\u2500 Chart.yaml\n\u251c\u2500\u2500 README.md\n\u251c\u2500\u2500 templates\n\u2502   \u251c\u2500\u2500 NOTES.txt\n\u2502   \u251c\u2500\u2500 _helpers.tpl\n\u2502   \u251c\u2500\u2500 deployment.yaml\n\u2502   \u2514\u2500\u2500 service.yaml\n\u2514\u2500\u2500 values.yaml<\/code><\/pre>\n<p>\nGrunden f\u00f6r Helm-konceptet \u00e4r hantering av flera versioner av distributioner. Stabil version \u00e4r v\u00e5r huvudstabila gren av projektets kod. Men med hj\u00e4lp av Helm kan vi distribuera en kanarief\u00f6rdelning med v\u00e5r experimentella kod. Det viktigaste \u00e4r att bevara trafikfl\u00f6det mellan den stabila versionen och kanarief\u00f6rdelningen. Vi kommer att hantera allt detta med en speciell selektor:<\/p>\n<pre><code class=\"xml\">selector:\n  app.kubernetes.io\\\/name: myapp<\/code><\/pre>\n<p>\nV\u00e5ra b\u00e5de \"kanarief\u00e5gel\"- och stabila distribueringsresurser kommer att ange denna tagg p\u00e5 modulerna. Om allt konfigureras korrekt, kommer vi under distributionen av v\u00e5r kanarif\u00e5gelversion av Helm-diagrammet att se att trafiken dirigeras till de nyligen distribuerade modulerna. Den stabila versionen av detta kommando kommer att se ut s\u00e5 h\u00e4r: <\/p>\n<pre><code class=\"xml\">helm upgrade\n  --install myapp \n  --namespace default \n  --set app.name=myapp       # G\u00e5r in i app.kubernetes.io\/name\n  --set app.version=v1       # G\u00e5r in i app.kubernetes.io\/version\n  --set image.tag=stable \n  --set replicaCount=5<\/code><\/pre>\n<p>\nNu ska vi kontrollera v\u00e5r kanarif\u00e5gelrelease. F\u00f6r att distribuera kanarif\u00e5gelversionen m\u00e5ste vi t\u00e4nka p\u00e5 tv\u00e5 saker. Namnet p\u00e5 release m\u00e5ste skilja sig s\u00e5 att vi inte uppdaterar den nuvarande stabila versionen. Version och tagg m\u00e5ste ocks\u00e5 vara olika s\u00e5 att vi kan distribuera annan kod och avg\u00f6ra skillnaderna genom resursens taggar. <\/p>\n<pre><code class=\"xml\">helm upgrade\n  --install myapp-canary \n  --namespace default \n  --set app.name=myapp       # G\u00e5r in i app.kubernetes.io\/name\n  --set app.version=v2       # G\u00e5r in i app.kubernetes.io\/version\n  --set image.tag=canary \n  --set replicaCount=1<\/code><\/pre>\n<p>\nS\u00e5, det \u00e4r allt! Om du pingar tj\u00e4nsten kan du se att kanarif\u00e5geluppdateringen dirigerar trafiken endast en del av tiden. <\/p>\n<p>\nOm du letar efter automatiseringsverktyg f\u00f6r distribueringsprocessen som inkluderar den beskrivna logiken, ta en titt p\u00e5 <noindex><a rel=\"nofollow\" href=\"https:\/\/deliverybot.github.io\/\">Deliverybot<\/a><\/noindex> och p\u00e5 <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/deliverybot\/helm\">automatiseringsverktyg f\u00f6r Helm p\u00e5 GitHub<\/a><\/noindex>. Helm-diagrammen som anv\u00e4nds f\u00f6r att implementera den ovan beskrivna metoden finns p\u00e5 Github, <noindex><a rel=\"nofollow\" href=\"http:\/\/github.com\/deliverybot\/helm\/charts\">h\u00e4r<\/a><\/noindex>. Generellt var detta en teoretisk \u00f6versikt \u00f6ver hur man implementerar automatisering av kanarif\u00e5gelversioner i praktiken, med specifika koncept och exempel.<br \/>\n<br \/>K\u00e4lla: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/itsumma\/blog\/468013\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u0430\u043d\u0430\u0440\u0435\u0435\u0447\u043d\u044b\u0439 \u0434\u0435\u043f\u043b\u043e\u0439 \u2014 \u044d\u0442\u043e \u043e\u0447\u0435\u043d\u044c \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u044b\u0439 \u0441\u043f\u043e\u0441\u043e\u0431 \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043d\u043e\u0432\u043e\u0433\u043e \u043a\u043e\u0434\u0430 \u043d\u0430 \u043a\u0430\u043a\u043e\u043c-\u0442\u043e \u043f\u043e\u0434\u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439. \u041e\u043d \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0441\u043d\u0438\u0436\u0430\u0435\u0442 \u0442\u0440\u0430\u0444\u0438\u043a-\u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0443, \u0441 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043c\u043e\u0433\u0443\u0442 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u0443\u0442\u044c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0440\u0430\u0437\u0432\u0435\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u044f, \u0442\u0430\u043a \u043a\u0430\u043a \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442 \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u0445 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0439 \u043f\u043e\u0434\u0433\u0440\u0443\u043f\u043f\u044b. \u042d\u0442\u0430 \u0437\u0430\u043c\u0435\u0442\u043a\u0430 \u043f\u043e\u0441\u0432\u044f\u0449\u0435\u043d\u0430 \u0442\u043e\u043c\u0443, \u043a\u0430\u043a \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0439 \u0434\u0435\u043f\u043b\u043e\u0439 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430\u043c\u0438 Kubernetes \u0438 \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0437\u0430\u0446\u0438\u0438 \u0434\u0435\u043f\u043b\u043e\u044f. \u041f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u0432\u044b \u043a\u043e\u0435-\u0447\u0442\u043e \u0437\u043d\u0430\u0435\u0442\u0435 \u043e Helm \u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":28760,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-38312","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\u0430\u043d\u0430\u0440\u0435\u0435\u0447\u043d\u044b\u0439.\" \/>\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\/sv\/blog\/administrirovanie\/prostoj-i-bezopasnyj-sposob-avtomatizatsii-kanareechnyh-deploev-s-pomoshhyu-helm\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta 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