{"id":6277,"date":"2019-07-26T18:31:45","date_gmt":"2019-07-26T18:31:45","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=6277"},"modified":"2021-11-16T11:13:06","modified_gmt":"2021-11-16T11:13:06","slug":"working-with-kubernetes-cluster-using-kubectl-part-4-api-object-versions","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/working-with-kubernetes-cluster-using-kubectl-part-4-api-object-versions\/","title":{"rendered":"Kubernetes Commands: kubectl api-versions &#8211; Tutorials and Examples"},"content":{"rendered":"\n<p><strong>deployment.yaml<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">apiVersion: apps\/v1\nkind: Deployment\nmetadata:\n  name: hello-world\n  labels:\n    app: hello-world\nspec:\n  replicas: 4\n  selector:\n    matchLabels:\n      app: hello-world\n  template:\n    metadata:\n      labels:\n        app: hello-world\n    spec:\n      containers:\n      - name: hello-world\n        image: gcr.io\/google-samples\/hello-app:1.0\n        ports:\n        - containerPort: 8080\n<\/code><\/span><\/pre>\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-comment\">#Let's ask the API Server for the API Groups it knows about.<\/span>\nkubectl api-resources | more\n\n<span class=\"hljs-comment\">#A list of the objects available in that API Group<\/span>\nkubectl api-resources --api-group=apps\n\n<span class=\"hljs-comment\">#We can use explain to dig further into a specific API Object <\/span>\n<span class=\"hljs-comment\">#Check out KIND and VERSION, we'll see the API Group in the from group\/version <\/span>\n<span class=\"hljs-comment\">#Which is extensions\/v1beta1 and that's deprecated.<\/span>\nkubectl explain deployment | head\n\n<span class=\"hljs-comment\">#Follow the version specified in the deprecation warning. That's deprecated too!<\/span>\nkubectl explain deployment --api-version apps\/v1beta2 | head\n\n<span class=\"hljs-comment\">#Follow the version specified in THAT deprecation warning. Ah...the one we should use.<\/span>\nkubectl explain deployment --api-version apps\/v1 | head\n\n<span class=\"hljs-comment\">#Print the supported API versions on the API server again in the form group\/version.<\/span>\n<span class=\"hljs-comment\">#Here we see apps\/v1,apps\/v1beta1 and apps\/v1beta2<\/span>\nkubectl api-versions | sort | more\n\n<span class=\"hljs-comment\">#Now, we're in a transition period of where Deployments are moving from v1beta1, to v1beta2 to apps\/v1<\/span>\n<span class=\"hljs-comment\">#Deployment went GA under apps\/v1 in version 1.9, as of 1.13 it's still a work in progress.<\/span>\n<span class=\"hljs-comment\">#Follow the issue on GitHub - https:\/\/github.com\/kubernetes\/kubernetes\/issues\/43214<\/span>\nkubectl apply -f deployment.yaml\n\n<span class=\"hljs-comment\">#Our 1.13 API Server converts apiVersion to v1beta1<\/span>\n<span class=\"hljs-comment\">#let's look at a Deployment<\/span>\nkubectl get deployment hello-world -o yaml | head\n\n<span class=\"hljs-comment\">#Let's clean up after this demo<\/span>\nkubectl delete deployment hello-world<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n<div class=\"epyt-gallery\" data-currpage=\"1\" id=\"epyt_gallery_45531\"><iframe loading=\"lazy\"  id=\"_ytid_42990\"  width=\"760\" height=\"427\"  data-origwidth=\"760\" data-origheight=\"427\" src=\"https:\/\/www.youtube.com\/embed\/?enablejsapi=1&#038;autoplay=0&#038;cc_load_policy=0&#038;cc_lang_pref=&#038;iv_load_policy=1&#038;loop=0&#038;rel=1&#038;fs=1&#038;playsinline=0&#038;autohide=2&#038;theme=dark&#038;color=red&#038;controls=1&#038;disablekb=0&#038;\" class=\"__youtube_prefs__  no-lazyload\" title=\"YouTube player\"  data-epytgalleryid=\"epyt_gallery_45531\"  allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen data-no-lazy=\"1\" data-skipgform_ajax_framebjll=\"\"><\/iframe><div class=\"epyt-gallery-list\"><div>Sorry, there was a YouTube error.<\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>deployment.yaml<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[4859],"tags":[],"class_list":["post-6277","post","type-post","status-publish","format-standard","hentry","category-kubernetes"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/6277","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=6277"}],"version-history":[{"count":9,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/6277\/revisions"}],"predecessor-version":[{"id":25481,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/6277\/revisions\/25481"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=6277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=6277"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=6277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}