{"id":90272,"date":"2020-07-30T13:42:02","date_gmt":"2020-07-30T11:42:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/canary-deployment-v-kubernetes-1-gitlab-ci"},"modified":"2020-07-30T13:42:02","modified_gmt":"2020-07-30T11:42:02","slug":"canary-deployment-v-kubernetes-1-gitlab-ci","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/canary-deployment-v-kubernetes-1-gitlab-ci","title":{"rendered":"Canary juurutamine Kuberneteses #1: Gitlab CI","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<h4 id=\"my-budem-ispolzovat-gitlab-ci-i-ruchnoy-gitops-dlya-vnedreniya-i-ispolzovaniya-canary-deploya-v-kubernetes\">Kasutame Gitlab CI ja k\u00e4sitsi GitOps'i, et rakendada ja kasutada Canary-deployd Kubernetesis.<\/h4>\n<p>\n<img decoding=\"async\" alt=\"Canary juurutamine Kuberneteses #1: Gitlab CI\" src=\"\/wp-content\/uploads\/2020\/07\/03a53dec150529deb3438efaeaa8a1bd.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h4 id=\"stati-iz-etogo-cikla\">Selle artikli seeria:<\/h4>\n<p><\/p>\n<ul>\n<li>(see artikkel)<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/en\/company\/nixys\/blog\/513118\/\">Canary Deployment ArgoCI abil<\/a><\/noindex><\/li>\n<li>Canary Deployment Istio abil<\/li>\n<li>Canary Deployment Jenkins-X Istio Flagger abil<\/li>\n<\/ul>\n<p><\/p>\n<p>Canary-deployd teeme k\u00e4sitsi l\u00e4bi GitOps'i ja Kubernetes'i peamiste ressursside loomise\/muutmise. <strong>See artikkel on suunatud peamiselt<\/strong> selle tutvustamiseks, kuidas Kuberneteses Canary-deploy toimib, kuna on olemas t\u00f5husamad automaatimise viisid, mida k\u00e4sitleme j\u00e4rgmistes artiklites.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Canary juurutamine Kuberneteses #1: Gitlab CI\" src=\"\/wp-content\/uploads\/2020\/07\/d5127cf7dcec695bd8872b1704eb7e90.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.norberteder.com\/canary-deployment\/\">https:\/\/www.norberteder.com\/canary-deployment\/<\/a><\/noindex><\/p>\n<p><\/p>\n<h3 id=\"canary-deployment\">Canary juurutamine<\/h3>\n<p><\/p>\n<p>Canary-strateegia puhul rakendatakse uuendused esmalt ainult osa kasutajatele. J\u00e4lgimise, logiandmete, k\u00e4sitsi testimise v\u00f5i teiste tagasiside kanalite kaudu testitakse v\u00e4ljaanne enne selle rakendamist k\u00f5igile kasutajatele.<\/p>\n<p><\/p>\n<h3 id=\"kubernetes-deployment-rolling-update\">Kubernetes Deployment (rolling update)<\/h3>\n<p><\/p>\n<p>Kubernetes Deployment'i vaikestrateegia on rolling-update, kus k\u00e4ivitatakse kindel arv pod'e uute piltide versioonidega. Kui need loodi probleemideta, l\u00f5petatakse vanade piltide pod'id ja uued pod'id luuakse paralleelselt.<\/p>\n<p><\/p>\n<h3 id=\"gitops\">GitOps<\/h3>\n<p><\/p>\n<p>Kasutame GitOps'i selles n\u00e4ites, kuna me:<\/p>\n<p><\/p>\n<ul>\n<li>kasutame Git'i kui ainsat t\u00f5e allikat.<\/li>\n<li>kasutame Git Operations'i ehitamiseks ja juurutamiseks (v\u00e4lja arvatud git tag\/merge, pole muid k\u00e4ske vajalik)<\/li>\n<\/ul>\n<p><\/p>\n<h3 id=\"primer\">N\u00e4ide<\/h3>\n<p><\/p>\n<p>L\u00e4hme head praktikat \u2014 omame \u00fchte hoidlat rakenduste koodi jaoks ja \u00fchte infrastruktuuri jaoks.<\/p>\n<p><\/p>\n<h4 id=\"repozitoriy-dlya-prilozheniy\">Rakenduste hoidla<\/h4>\n<p><\/p>\n<p>See on v\u00e4ga lihtne API Python+Flask'il, mis tagastab vastuse JSON-vormingus. Me ehitame paketi l\u00e4bi GitlabCI ja viime tulemuse Gitlabi registrisse. Registris on meil kaks erinevat versiooni v\u00e4ljalaskest:<\/p>\n<p><\/p>\n<ul>\n<li><code>wuestkamp\/k8s-deployment-example-app:v1<\/code><\/li>\n<li><code>wuestkamp\/k8s-deployment-example-app:v2<\/code><\/li>\n<\/ul>\n<p><\/p>\n<p>Ainus erinevus nende vahel on muutus tagastatud JSON-failis. Kasutame seda rakendust maksimaalselt lihtsa visualiseerimise jaoks, et n\u00e4ha, millega versiooniga me suhtleme.<\/p>\n<p><\/p>\n<h4 id=\"infrastrukturnyy-repozitoriy\">Infrastruktuuri register<\/h4>\n<p><\/p>\n<p>Selles hoidlas viime juurutamise l\u00e4bi GitlabCI Kubernetesesse, <code>.gitlab-ci.yml<\/code> see n\u00e4eb v\u00e4lja j\u00e4rgmine:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">image: traherom\/kustomize-docker\n\nbefore_script:\n   - printenv\n   - kubectl version\n\nstages:\n - deploy\n\ndeploy test:\n   stage: deploy\n   before_script:\n     - echo $KUBECONFIG\n   script:\n     - kubectl get all\n     - kubectl apply -f i\/k8s\n\n   only:\n     - master\n<\/code><\/pre>\n<p><\/p>\n<p>Selle k\u00e4ivitamiseks iseseisvalt vajate klastrit, v\u00f5ite kasutada Gcloudi:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">gcloud container clusters create canary --num-nodes 3 --zone europe-west3-b\n\ngcloud compute firewall-rules create incoming-80 --allow tcp:80<\/code><\/pre>\n<p><\/p>\n<p>Te peate tegema forki <noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/wuestkamp\/k8s-deployment-example-canary-infrastructure\">https:\/\/gitlab.com\/wuestkamp\/k8s-deployment-example-canary-infrastructure<\/a><\/noindex> ja looma muutuja <code>KUBECONFIG<\/code> GitlabCI-s, mis sisaldab konfiguraatiot juurdep\u00e4\u00e4su jaoks <code>kubectl<\/code> teie klastrile.<\/p>\n<p><\/p>\n<p>Kuidas saada klastrile (Gcloud) autentimist saate lugeda <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/faun\/manually-connect-to-your-kubernetes-cluster-from-the-outside-d852346a7f0a\">siit<\/a><\/noindex>.<\/p>\n<p><\/p>\n<h4 id=\"infrastrukturnyy-yaml\">Infrastruktuuri Yaml<\/h4>\n<p><\/p>\n<p>Meie infrastruktuuri hoidlas on meil teenus:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">apiVersion: v1\nkind: Service\nmetadata:\n labels:\n   id: app\n name: app\nspec:\n ports:\n - port: 80\n   protocol: TCP\n   targetPort: 5000\n selector:\n   id: app\n type: LoadBalancer<\/code><\/pre>\n<p><\/p>\n<p>Ja juurutamine failis <code>deploy.yaml<\/code>:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">apiVersion: apps\/v1\nkind: Deployment\nmetadata:\n name: app\nspec:\n replicas: 10\n selector:\n   matchLabels:\n     id: app\n     type: main\n template:\n   metadata:\n     labels:\n       id: app\n       type: main\n   spec:\n     containers:\n     - image: registry.gitlab.com\/wuestkamp\/k8s-deployment-example-app:v1\n       name: app\n       resources:\n         limits:\n           cpu: 100m\n           memory: 100Mi<\/code><\/pre>\n<p><\/p>\n<p>Ja teine deployment on <code>deploy-canary.yaml<\/code>:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">kind: Deployment\nmetadata:\n name: app-canary\nspec:\n replicas: 0\n selector:\n   matchLabels:\n     id: app\n     type: canary\n template:\n   metadata:\n     labels:\n       id: app\n       type: canary\n   spec:\n     containers:\n     - image: registry.gitlab.com\/wuestkamp\/k8s-deployment-example-app:v2\n       name: app\n       resources:\n         limits:\n           cpu: 100m\n           memory: 100Mi<\/code><\/pre>\n<p><\/p>\n<p>Pange t\u00e4hele, et app-deploy'il ei ole praegu m\u00e4\u00e4ratud replikate arvu.<\/p>\n<p><\/p>\n<h4 id=\"vypolnenie-nachalnogo-deploya\">Algse deploy k\u00e4itamine<\/h4>\n<p><\/p>\n<p>Algse deployment'i k\u00e4ivitamiseks saate k\u00e4sitsi k\u00e4ivitada GitlabCI toru peaharus. P\u00e4rast seda <code>kubectl<\/code> see peaks v\u00e4ljundama j\u00e4rgmist:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary juurutamine Kuberneteses #1: Gitlab CI\" src=\"\/wp-content\/uploads\/2020\/07\/e8ea95fe6c3925f46f6430ce2293063c.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<p>N\u00e4eme <code>app<\/code> deployment't 10 replikaga ja app-canary't 0. Samuti on olemas LoadBalancer, mille kaudu saame p\u00f6\u00f6rduda <code>curl<\/code> External IP kaudu:<\/p>\n<p><\/p>\n<p><code>while true; do curl -s 35.198.149.232 | grep label; sleep 0.1; done<\/code><\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary juurutamine Kuberneteses #1: Gitlab CI\" src=\"\/wp-content\/uploads\/2020\/07\/06e6928002532dbe03b65356964110c7.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<p>N\u00e4eme, et meie testrakendus tagastab ainult \"v1\".<\/p>\n<p><\/p>\n<h3 id=\"vypolnenie-canary-deploya\">Canary deployment'i teostamine<\/h3>\n<p><\/p>\n<h4 id=\"shag-1-vypustit-novuyu-versiyu-dlya-chasti-polzovateley\">Samm 1: vabasta uus versioon osale kasutajatele<\/h4>\n<p><\/p>\n<p>Oleme m\u00e4\u00e4ranud replikate arvu 1 failis deploy-canary.yaml ja uus versioonipilt:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">t\u00fc\u00fcp: Deployment\nmetainfo:\n nimi: app-canary\nspetsifikatsioon:\n replikad: 1\n valija:\n   vasteSildid:\n     id: app\n     t\u00fc\u00fcp: canary\n mall:\n   metainfo:\n     sildid:\n       id: app\n       t\u00fc\u00fcp: canary\n   spetsifikatsioon:\n     konteinerid:\n     - pilt: registry.gitlab.com\/wuestkamp\/k8s-deployment-example-app:v2\n       nimi: app\n       ressursid:\n         piirangud:\n           cpu: 100m\n           m\u00e4lu: 100Mi<\/code><\/pre>\n<p><\/p>\n<p>Failis <code>deploy.yaml<\/code> me oleme muutnud replikate arvu 9-ks:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">t\u00fc\u00fcp: Deployment\nmetainfo:\n nimi: app\nspetsifikatsioon:\n replikad: 9\n valija:\n   vasteSildid:\n     id: app\n...<\/code><\/pre>\n<p><\/p>\n<p>Me viime need muudatused hoidlasse, kust k\u00e4ivitatakse deploy (GitlabCI kaudu) ja n\u00e4eme l\u00f5puks:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary juurutamine Kuberneteses #1: Gitlab CI\" src=\"\/wp-content\/uploads\/2020\/07\/b639716b31e41e8eac573fd365ad6780.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<p>Meie teenus osutab m\u00f5lemale deploy-le, kuna m\u00f5lemal on id-aplikaator. Kuberneetilises s\u00fcsteemis toimiva juhusliku jaotuse t\u00f5ttu peaksime n\u00e4gema erinevaid vastuseid umbes 10% p\u00e4ringutest:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary juurutamine Kuberneteses #1: Gitlab CI\" src=\"\/wp-content\/uploads\/2020\/07\/d1177207ebd8952fd1994ed0ebdda6a3.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<p>Meie rakenduse praegune olek (GitOps, mis on saadud Gitist kui ainus t\u00f5eallikas) on kahe aktiivse replikaga deployment - iga versiooni jaoks \u00fcks.<\/p>\n<p><\/p>\n<p>~10% kasutajatest tutvuvad uue versiooniga ja testivad seda tahtmatult. On aeg kontrollida logides ja monitooringu andmetes vigu probleemide leidmiseks.<\/p>\n<p><\/p>\n<h4 id=\"shag-2-vypustit-novuyu-versiyu-dlya-vseh-polzovateley\">Samm 2: vabastada uus versioon k\u00f5igile kasutajatele<\/h4>\n<p><\/p>\n<p>Oleme otsustanud, et k\u00f5ik l\u00e4ks h\u00e4sti ja n\u00fc\u00fcd peame uue versiooni k\u00f5igile kasutajatele installima. Selleks uuendame lihtsalt <code>deploy.yaml<\/code> seadmise uus versioon ja replikate arv on 10. V <code>deploy-canary.yaml<\/code> seame replikate arvu tagasi 0. P\u00e4rast juurutamist on tulemus j\u00e4rgmine:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary juurutamine Kuberneteses #1: Gitlab CI\" src=\"\/wp-content\/uploads\/2020\/07\/a31aafe96a09c6d2651b2bf7add4dd29.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3 id=\"podvodya-itog\">Kokkuv\u00f5tteks<\/h3>\n<p><\/p>\n<p>Minu jaoks aitab k\u00e4sitsi juurutamine m\u00f5ista, kui lihtsalt seda saab k8si abil seadistada. Kuna Kubernetes v\u00f5imaldab k\u00f5ike uuendada API kaudu, saab neid samme automatiseerida skriptide abil.<\/p>\n<p><\/p>\n<p>Veel \u00fcks asi, mida tuleb ellu viia \u2014 on testija sisenemispunkt (LoadBalancer v\u00f5i Ingressi kaudu), mille kaudu saab juurde p\u00e4\u00e4seda ainult uuele versioonile. Seda v\u00f5ib kasutada k\u00e4sitsi vaatamiseks.<\/p>\n<p><\/p>\n<p>J\u00e4rgmistes artiklites uurime muid automatiseeritud lahendusi, mis rakendavad enamikku meie tehtust.<\/p>\n<p><\/p>\n<h2 id=\"takzhe-chitayte-drugie-stati-v-nashem-bloge\">Vaata ka teisi artikleid meie blogis:<\/h2>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nixys\/blog\/468779\/\">Milleks viis ClickHouse'i migreerimine ilma autentsioonita ClickHouse'iga autentsiooniga<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nixys\/blog\/473578\/\">D\u00fcnaamiliste moodulite koostamine Nginxile<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nixys\/news\/t\/502658\/\">nxs-build-tools'i uuendamine \u2014 abi deb ja rpm pakettide koostamisel<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nixys\/blog\/473014\/\">Sissejuhatus Hashicorp Consul's Kubernetes volitusele<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nixys\/blog\/504762\/\">Millega pidime silmitsi seisma Csync2 utiliidi kasutamisel<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nixys\/blog\/347526\/\">Telegrami bot Redmine'ile. Kuidas elu endale ja teistele lihtsamaks teha<\/a><\/noindex><\/li>\n<\/ul>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nixys\/blog\/512766\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041c\u044b \u0431\u0443\u0434\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c Gitlab CI \u0438 \u0440\u0443\u0447\u043d\u043e\u0439 GitOps \u0434\u043b\u044f \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u044f \u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f Canary-\u0434\u0435\u043f\u043b\u043e\u044f \u0432 Kubernetes \u0421\u0442\u0430\u0442\u044c\u0438 \u0438\u0437 \u044d\u0442\u043e\u0433\u043e \u0446\u0438\u043a\u043b\u0430: (\u044d\u0442\u0430 \u0441\u0442\u0430\u0442\u044c\u044f) Canary Deployment \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 ArgoCI Canary Deployment 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