{"id":90699,"date":"2020-08-05T01:42:12","date_gmt":"2020-08-04T23:42:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/canary-deployment-v-kubernetes-3-istio"},"modified":"2020-08-05T01:42:12","modified_gmt":"2020-08-04T23:42:12","slug":"canary-deployment-v-kubernetes-3-istio","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/canary-deployment-v-kubernetes-3-istio","title":{"rendered":"Canary Deployment v Kubernetes #3: Istio","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<h3 id=\"ispolzovanie-istiokiali-dlya-zapuska-i-vizualizacii-canary-deploya\">Pou\u017eit\u00ed Istio+Kiali k prov\u00e1d\u011bn\u00ed a vizualizaci Canary nasazen\u00ed<\/h3>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/2eeaaaeaa565700d7a8f6f72c5638d4e.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h4 id=\"stati-etogo-cikla\">\u010cl\u00e1nky t\u00e9to s\u00e9rie<\/h4>\n<p><\/p>\n<ol>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/en\/company\/nixys\/blog\/512766\/\">Canary Deployment v Kubernetes #1: Gitlab CI<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/en\/company\/nixys\/blog\/513118\/\">Canary Deployment v Kubernetes #2: Argo Rollouts<\/a><\/noindex><\/li>\n<li>(tento \u010dl\u00e1nek)<\/li>\n<li>Canary Deployment pomoc\u00ed Jenkins-X Istio Flagger<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3 id=\"canary-deployment\">Canary Deployment<\/h3>\n<p><\/p>\n<p>Douf\u00e1me, \u017ee jste si p\u0159e\u010detli <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/en\/company\/nixys\/blog\/512766\/\">prvn\u00ed \u010d\u00e1st<\/a><\/noindex>, kde jsme stru\u010dn\u011b vysv\u011btlili, co jsou Canary deployments, a uk\u00e1zali, jak je realizovat pomoc\u00ed standardn\u00edch prost\u0159edk\u016f Kubernetes.<\/p>\n<p><\/p>\n<h3 id=\"istio\">Istio<\/h3>\n<p><\/p>\n<p>A p\u0159edpokl\u00e1d\u00e1me, \u017ee p\u0159i \u010dten\u00ed tohoto \u010dl\u00e1nku ji\u017e v\u00edte, co je Istio. Pokud ne, m\u016f\u017eete si o n\u011bm p\u0159e\u010d\u00edst <noindex><a rel=\"nofollow\" href=\"https:\/\/itnext.io\/kubernetes-istio-simply-visually-explained-58a7d158b83f?source=friends_link&amp;sk=378ed718d2d6cfd09e6d23c7616cba81\">zde<\/a><\/noindex>.<\/p>\n<p><\/p>\n<h3 id=\"prilozhenie-dlya-testov\">Aplikace pro testov\u00e1n\u00ed<\/h3>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/4c1e7d1644411cecaf52433b98219bb4.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Ka\u017ed\u00fd pod obsahuje dva kontejnery: na\u0161i aplikaci a istio-proxy.<\/p>\n<p><\/p>\n<p>Pou\u017eijeme jednoduchou testovac\u00ed aplikaci s pody frontend-nginx a backend na pythonu. Pod s nginx bude prost\u011b p\u0159esm\u011brov\u00e1vat ka\u017ed\u00fd po\u017eadavek na pod s backendem a fungovat jako proxy. Podrobnosti lze nal\u00e9zt v n\u00e1sleduj\u00edc\u00edch yaml:<\/p>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/wuestkamp\/k8s-deployment-example-istio-canary-infrastructure\/blob\/master\/i\/k8s\/frontend.yaml\">frontend.yaml<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/wuestkamp\/k8s-deployment-example-istio-canary-infrastructure\/blob\/master\/i\/k8s\/backend.yaml\">backend.yaml<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/wuestkamp\/k8s-deployment-example-istio-canary-infrastructure\/blob\/master\/i\/k8s\/istio.yaml\">istio.yaml<\/a><\/noindex><\/li>\n<\/ul>\n<p><\/p>\n<h4 id=\"zapusk-testovogo-prilozheniya-samostoyatelno\">Spu\u0161t\u011bn\u00ed testovac\u00ed aplikace samostatn\u011b<\/h4>\n<p><\/p>\n<p>Pokud chcete n\u00e1sledovat m\u016fj p\u0159\u00edklad a pou\u017e\u00edt tuto testovac\u00ed aplikaci samostatn\u011b, pod\u00edvejte se na <noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/wuestkamp\/k8s-deployment-example-istio-canary-infrastructure\/blob\/master\/README.md\">readme projektu<\/a><\/noindex>.<\/p>\n<p><\/p>\n<h3 id=\"nachalnyy-deployment\">Po\u010d\u00e1te\u010dn\u00ed nasazen\u00ed<\/h3>\n<p><\/p>\n<p>P\u0159i spu\u0161t\u011bn\u00ed prvn\u00edho nasazen\u00ed vid\u00edme, \u017ee pody na\u0161\u00ed aplikace maj\u00ed pouze dva kontejnery, to znamen\u00e1, \u017ee Istio sidecar se zat\u00edm pouze zav\u00e1d\u00ed:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/5e1340c271845973cf932cc291d98972.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<p>A tak\u00e9 vid\u00edme Istio Gateway Loadbalancer v namespace <code>istio-system<\/code>:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/24549496f038bd61d1288b122c66e6ea.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h4 id=\"sozdanie-trafika\">Vytvo\u0159en\u00ed provozu<\/h4>\n<p><\/p>\n<p>Pou\u017eijeme n\u00e1sleduj\u00edc\u00ed IP, abychom vygenerovali provoz, kter\u00fd bude p\u0159ijat frontend pody a p\u0159esm\u011brov\u00e1n na backend pody:<\/p>\n<p><\/p>\n<p><code>while true; do curl -s --resolve 'frontend.istio-test:80:35.242.202.152' frontend.istio-test; sleep 0.1; done<\/code><\/p>\n<p><\/p>\n<p>Tak\u00e9 p\u0159id\u00e1me <code>frontend.istio-test<\/code> do na\u0161eho hosts souboru.<\/p>\n<p><\/p>\n<h4 id=\"prosmotr-mesh-cherez-kiali\">Zobrazen\u00ed Mesh p\u0159es Kiali<\/h4>\n<p><\/p>\n<p>Nainstalovali jsme testovac\u00ed aplikaci a Istio spole\u010dn\u011b s Tracing, Grafana, Prometheus a Kiali (v\u00edce viz <noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/wuestkamp\/k8s-deployment-example-istio-canary-infrastructure\/blob\/master\/README.md\">readme projektu<\/a><\/noindex>). Tud\u00ed\u017e m\u016f\u017eeme pou\u017e\u00edvat Kiali p\u0159es:<\/p>\n<p><\/p>\n<p><code>istioctl dashboard kiali # admin:admin<\/code><\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/3e925a977aedcde3912d46dcc1f47713.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Kiali vizualizuje aktu\u00e1ln\u00ed provoz p\u0159es Mesh<\/p>\n<p><\/p>\n<p>Jak vid\u00edme, 100% provozu sm\u011b\u0159uje na frontendovou slu\u017ebu, pot\u00e9 na pod frontend s label v1, proto\u017ee pou\u017e\u00edv\u00e1me jednoduch\u00fd nginx-proxy, kter\u00fd p\u0159esm\u011brov\u00e1v\u00e1 po\u017eadavky na backendovou slu\u017ebu, kter\u00e1 je op\u011bt p\u0159esm\u011brov\u00e1v\u00e1 na backend pody s label v1.<\/p>\n<p><\/p>\n<p>Kiali skv\u011ble funguje spolu s Istio a poskytuje hotov\u00e9 \u0159e\u0161en\u00ed pro vizualizaci Mesh. To je prost\u011b skv\u011bl\u00e9.<\/p>\n<p><\/p>\n<h3 id=\"canary-deployment-1\">Canary Deployment<\/h3>\n<p><\/p>\n<p>N\u00e1\u0161 backend ji\u017e m\u00e1 dv\u011b k8s nasazen\u00ed, jedno pro v1 a jedno pro v2. Te\u010f mus\u00edme \u0159\u00edct Istio, aby p\u0159esm\u011brovalo ur\u010dit\u00fd procentn\u00ed pod\u00edl po\u017eadavk\u016f na v2. <\/p>\n<p><\/p>\n<h3 id=\"shag-1-10\">Krok 1: 10%<\/h3>\n<p><\/p>\n<p>A v\u0161echno, co pot\u0159ebujeme ud\u011blat, je upravit v\u00e1hu VirtualService v <noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/wuestkamp\/k8s-deployment-example-istio-canary-infrastructure\/blob\/master\/i\/k8s\/istio.yaml\">istio.yaml<\/a><\/noindex>:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">apiVersion: networking.istio.io\/v1alpha3\nkind: VirtualService\nmetadata:\n  name: backend\n  namespace: default\nspec:\n  gateways: []\n  hosts:\n  - \"backend.default.svc.cluster.local\"\n  http:\n  - match:\n    - {}\n    route:\n    - destination:\n        host: backend.default.svc.cluster.local\n        subset: v1\n        port:\n          number: 80\n      weight: 90\n    - destination:\n        host: backend.default.svc.cluster.local\n        subset: v2\n        port:\n          number: 80\n      weight: 10<\/code><\/pre>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/5cf97856676873f5f3cba08b15964c18.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<p>Vid\u00edme, \u017ee 10 % po\u017eadavk\u016f je p\u0159esm\u011brov\u00e1no na v2.<\/p>\n<p><\/p>\n<h4 id=\"shag-2-50\">Krok 2: 50 %<\/h4>\n<p><\/p>\n<p>A te\u010f sta\u010d\u00ed jen zv\u00fd\u0161it toto \u010d\u00edslo na 50 %:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">apiVersion: networking.istio.io\/v1alpha3\nkind: VirtualService\nmetadata:\n  name: backend\n  namespace: default\nspec:\n...\n    - destination:\n        host: backend.default.svc.cluster.local\n        subset: v1\n        port:\n          number: 80\n      weight: 50\n    - destination:\n        host: backend.default.svc.cluster.local\n        subset: v2\n        port:\n          number: 80\n      weight: 50<\/code><\/pre>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/c6b425b935e756a8b7ed72051db78763.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3 id=\"shag-3-100\">Krok 3: 100 %<\/h3>\n<p><\/p>\n<p>Nyn\u00ed m\u016f\u017ee b\u00fdt nasazen\u00ed Canary pova\u017eov\u00e1no za dokon\u010den\u00e9 a ve\u0161ker\u00fd provoz je p\u0159esm\u011brov\u00e1n na v2:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/bb028dc47f0799dc9371ce89ae64f805.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3 id=\"testirovanie-canary-vruchnuyu\">Manu\u00e1ln\u00ed testov\u00e1n\u00ed Canary<\/h3>\n<p><\/p>\n<p>P\u0159edstavme si, \u017ee nyn\u00ed pos\u00edl\u00e1me na backend v2 10 % v\u0161ech po\u017eadavk\u016f. Co kdy\u017e chceme ru\u010dn\u011b otestovat v2, abychom se ujistili, \u017ee v\u0161echno funguje tak, jak o\u010dek\u00e1v\u00e1me?<\/p>\n<p><\/p>\n<p>M\u016f\u017eeme p\u0159idat speci\u00e1ln\u00ed odpov\u00eddaj\u00edc\u00ed pravidlo zalo\u017een\u00e9 na HTTP hlavi\u010dk\u00e1ch:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">apiVersion: networking.istio.io\/v1alpha3\nkind: VirtualService\nmetadata:\n  name: backend\n  namespace: default\nspec:\n  gateways: []\n  hosts:\n  - \"backend.default.svc.cluster.local\"\n  http:\n  - match:\n    - headers:\n        canary:\n          exact: \"canary-tester\"\n    route:\n    - destination:\n        host: backend.default.svc.cluster.local\n        subset: v2\n        port:\n          number: 80\n      weight: 100\n  - match:\n    - {}\n    route:\n    - destination:\n        host: backend.default.svc.cluster.local\n        subset: v1\n        port:\n          number: 80\n      weight: 90\n    - destination:\n        host: backend.default.svc.cluster.local\n        subset: v2\n        port:\n          number: 80\n      weight: 10<\/code><\/pre>\n<p><\/p>\n<p>Nyn\u00ed pomoc\u00ed curl m\u016f\u017eeme donutit po\u017e\u00e1dat o v2 zasl\u00e1n\u00edm hlavi\u010dky:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/eaf26cae21c403944110b5d7705e1ebc.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<p>Po\u017eadavky bez hlavi\u010dky budou st\u00e1le \u0159\u00edzeny vzorcem 1\/10:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/8cb0cf5832dd935ba5c4649856ac9005.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h4 id=\"canary-dlya-dvuh-zavisimyh-versiy\">Canary pro dv\u011b z\u00e1visl\u00e9 verze<\/h4>\n<p><\/p>\n<p>Nyn\u00ed se pod\u00edv\u00e1me na p\u0159\u00edpad, kdy m\u00e1me verzi v2 jak pro frontend, tak pro backend. U obou jsme uvedli, \u017ee 10 % provozu by m\u011blo sm\u011b\u0159ovat k v2:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/4b5de3f82cb960102164034b7b6b100a.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<p>Vid\u00edme, \u017ee frontend v1 a v2 oba p\u0159esm\u011brov\u00e1vaj\u00ed provoz v pom\u011bru 1\/10 na backend v1 a v2.<\/p>\n<p><\/p>\n<p>A co kdybychom pot\u0159ebovali p\u0159esm\u011brov\u00e1vat provoz z frontend-v2 pouze na backend-v2, proto\u017ee nen\u00ed kompatibiln\u00ed s v1? K tomu nastav\u00edme pom\u011br 1\/10 pro frontend, kter\u00fd \u0159\u00edd\u00ed, jak\u00fd provoz se dost\u00e1v\u00e1 na backend-v2 pomoc\u00ed shody podle <code>sourceLabels<\/code> :<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">apiVersion: networking.istio.io\/v1alpha3\nkind: VirtualService\nmetadata:\n  name: backend\n  namespace: default\nspec:\n  gateways: []\n  hosts:\n  - \"backend.default.svc.cluster.local\"\n  http:\n...\n  - match:\n    - sourceLabels:\n        app: frontend\n        version: v2\n    route:\n    - destination:\n        host: backend.default.svc.cluster.local\n        subset: v2\n        port:\n          number: 80\n      weight: 100<\/code><\/pre>\n<p><\/p>\n<p>V\u00fdsledkem je to, co pot\u0159ebujeme:<\/p>\n<p>\n<img decoding=\"async\" alt=\"Canary Deployment v Kubernetes #3: Istio\" src=\"\/wp-content\/uploads\/2020\/08\/43739627279a9af11885e602a3e96390.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3 id=\"otlichiya-ot-ruchnogo-canary-podhoda\">Rozd\u00edly oproti ru\u010dn\u00edmu p\u0159\u00edstupu Canary<\/h3>\n<p><\/p>\n<p>V <em>prvn\u00ed \u010d\u00e1sti<\/em> Canary deployment jsme prov\u00e1d\u011bli ru\u010dn\u011b, tak\u00e9 s vyu\u017eit\u00edm dvou nasazen\u00ed k8s. Tam jsme spravovali pom\u011br po\u017eadavk\u016f, m\u011bn\u011bn\u00edm po\u010dtu replik. Tento p\u0159\u00edstup funguje, ale m\u00e1 v\u00e1\u017en\u00e9 nev\u00fdhody.<\/p>\n<p><\/p>\n<p>Istio umo\u017e\u0148uje definovat pom\u011br po\u017eadavk\u016f nez\u00e1visle na po\u010dtu replik. To znamen\u00e1, \u017ee m\u016f\u017eeme nap\u0159\u00edklad pou\u017e\u00edt HPA (Horizontal Pod Autoscalers \u2014 horizont\u00e1ln\u00ed \u0161k\u00e1lov\u00e1n\u00ed pod\u016f) a nen\u00ed t\u0159eba ho nastavovat podle aktu\u00e1ln\u00edho stavu Canary nasazen\u00ed.<\/p>\n<p><\/p>\n<h3 id=\"itog\">V\u00fdsledek<\/h3>\n<p><\/p>\n<p>Istio funguje skv\u011ble a pou\u017e\u00edv\u00e1n\u00ed jeho spolu s Kiali n\u00e1m poskytuje velmi silnou kombinaci. Dal\u0161\u00ed, co m\u011b zaj\u00edm\u00e1, je kombinace Spinnakeru s Istio pro automatizaci a Canary anal\u00fdzu.<\/p>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/nixys\/blog\/513578\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 Istio+Kiali \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0438 \u0432\u0438\u0437\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 Canary \u0434\u0435\u043f\u043b\u043e\u044f \u0421\u0442\u0430\u0442\u044c\u0438 \u044d\u0442\u043e\u0433\u043e \u0446\u0438\u043a\u043b\u0430 Canary Deployment \u0432 Kubernetes #1: Gitlab CI Canary Deployment \u0432 Kubernetes #2: Argo Rollouts (\u044d\u0442\u0430 \u0441\u0442\u0430\u0442\u044c\u044f) Canary Deployment \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f Jenkins-X Istio Flagger Canary Deployment \u041d\u0430\u0434\u0435\u0435\u043c\u0441\u044f, \u0447\u0442\u043e \u0432\u044b \u0447\u0438\u0442\u0430\u043b\u0438 \u043f\u0435\u0440\u0432\u0443\u044e \u0447\u0430\u0441\u0442\u044c, \u0433\u0434\u0435 \u043c\u044b \u043a\u0440\u0430\u0442\u043a\u043e \u043e\u0431\u044a\u044f\u0441\u043d\u044f\u043b\u0438 \u0447\u0442\u043e \u0442\u0430\u043a\u043e\u0435 Canary deployments \u0438 \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u043b\u0438 \u043a\u0430\u043a \u0435\u0433\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":90700,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-90699","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 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 Istio+Kiali \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0438 \u0432\u0438\u0437\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 Canary \u0434\u0435\u043f\u043b\u043e\u044f\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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