{"id":1609,"date":"2020-06-10T17:10:06","date_gmt":"2020-06-10T09:10:06","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1609"},"modified":"2020-06-10T17:10:06","modified_gmt":"2020-06-10T09:10:06","slug":"horizontal-pod-autoscaling","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1609","title":{"rendered":"Horizontal Pod Autoscaling"},"content":{"rendered":"<p>\u81ea\u52a8\u6c34\u5e73\u4f38\u7f29\uff0c\u662f\u6307\u8fd0\u884c\u5728k8s\u4e0a\u7684\u5e94\u7528\u8d1f\u8f7d(POD)\uff0c\u53ef\u4ee5\u6839\u636e\u8d44\u6e90\u4f7f\u7528\u7387\u8fdb\u884c\u81ea\u52a8\u6269\u5bb9\u3001\u7f29\u5bb9\uff1b\u6211\u4eec\u77e5\u9053\u5e94\u7528\u7684\u8d44\u6e90\u4f7f\u7528\u7387\u901a\u5e38\u90fd\u6709\u9ad8\u5cf0\u548c\u4f4e\u8c37\uff0c\u6240\u4ee5k8s\u7684<code>HPA<\/code>\u7279\u6027\u5e94\u8fd0\u800c\u751f\uff1b\u5b83\u4e5f\u662f\u6700\u80fd\u4f53\u73b0\u533a\u522b\u4e8e\u4f20\u7edf\u8fd0\u7ef4\u7684\u4f18\u52bf\u4e4b\u4e00\uff0c\u4e0d\u4ec5\u80fd\u591f\u5f39\u6027\u4f38\u7f29\uff0c\u800c\u4e14\u5b8c\u5168\u81ea\u52a8\u5316\uff01<br \/>\n\u6839\u636e CPU \u4f7f\u7528\u7387\u6216\u81ea\u5b9a\u4e49 metrics \u81ea\u52a8\u6269\u5c55 Pod \u6570\u91cf\uff08\u652f\u6301 replication controller\u3001deployment\uff09\uff1bk8s1.6\u7248\u672c\u4e4b\u524d\u662f\u901a\u8fc7kubelet\u6765\u83b7\u53d6\u76d1\u63a7\u6307\u6807\uff0c1.6\u7248\u672c\u4e4b\u540e\u662f\u901a\u8fc7api server\u3001heapster\u6216\u8005kube-aggregator\u6765\u83b7\u53d6\u76d1\u63a7\u6307\u6807\u3002<\/p>\n<h3><a id=\\\"user-content-metrics\u652f\u6301\\\" class=\\\"anchor\\\" href=\\\"https:\/\/github.com\/easzlab\/kubeasz\/blob\/master\/docs\/guide\/hpa.md#metrics%E6%94%AF%E6%8C%81\\\" aria-hidden=\\\"true\\\"><\/a>Metrics\u652f\u6301<\/h3>\n<p>\u6839\u636e\u4e0d\u540c\u7248\u672c\u7684API\u4e2d\uff0cHPA autoscale\u65f6\u9760\u4ee5\u4e0b\u6307\u6807\u6765\u5224\u65ad\u8d44\u6e90\u4f7f\u7528\u7387\uff1a<\/p>\n<ul>\n<li>autoscaling\/v1: CPU<\/li>\n<li>autoscaling\/v2alpha1\n<ul>\n<li>\u5185\u5b58<\/li>\n<li>\u81ea\u5b9a\u4e49metrics<\/li>\n<li>\u591ametrics\u7ec4\u5408: \u6839\u636e\u6bcf\u4e2ametric\u7684\u503c\u8ba1\u7b97\u51fascale\u7684\u503c\uff0c\u5e76\u5c06\u6700\u5927\u7684\u90a3\u4e2a\u503c\u4f5c\u4e3a\u6269\u5bb9\u7684\u6700\u7ec8\u7ed3\u679c<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3><a id=\\\"user-content-\u57fa\u7840\u793a\u4f8b\\\" class=\\\"anchor\\\" href=\\\"https:\/\/github.com\/easzlab\/kubeasz\/blob\/master\/docs\/guide\/hpa.md#%E5%9F%BA%E7%A1%80%E7%A4%BA%E4%BE%8B\\\" aria-hidden=\\\"true\\\"><\/a>\u57fa\u7840\u793a\u4f8b<\/h3>\n<p>\u6d4b\u8bd5\u73af\u5883\u57fa\u4e8ek8s 1.8 \u548c 1.9<br \/>\n\u4f7f\u7528<code>autoscaling\/v1<\/code>\u00a0\u7248\u672cAPI\uff0c<br \/>\n<strong>\u6ce8\u610f\u786e\u4fdd<\/strong><code>k8s<\/code>\u00a0\u96c6\u7fa4\u63d2\u4ef6<code>kubedns<\/code>\u00a0\u548c\u00a0<code>heapster<\/code>\u00a0\u5de5\u4f5c\u6b63\u5e38\u3002<\/p>\n<div class=\\\"highlight highlight-source-shell\\\">\n<pre><span class=\\\"pl-c\\\"># \u521b\u5efadeploy\u548cservice<\/span>\n$ kubectl run php-apache --image=pilchard\/hpa-example --requests=cpu=200m --expose --port=80\n<span class=\\\"pl-c\\\"># \u521b\u5efaautoscaler<\/span>\n$ kubectl autoscale deploy php-apache --cpu-percent=50 --min=1 --max=10\n<span class=\\\"pl-c\\\"># \u7b49\u5f853~5\u5206\u949f\u67e5\u770bhpa\u72b6\u6001<\/span>\n$ kubectl get hpa php-apache\nNAME         REFERENCE               TARGETS    MINPODS   MAXPODS   REPLICAS   AGE\nphp-apache   Deployment\/php-apache   0% \/ 50%   1         10        1          3m\n<span class=\\\"pl-c\\\"># \u589e\u52a0\u8d1f\u8f7d<\/span>\n$ kubectl run --rm -it load-generator --image=busybox \/bin\/sh\nHit enter <span class=\\\"pl-k\\\">for<\/span> <span class=\\\"pl-c1\\\">command<\/span> prompt\n$ <span class=\\\"pl-k\\\">while<\/span> <span class=\\\"pl-c1\\\">true<\/span><span class=\\\"pl-k\\\">;<\/span> <span class=\\\"pl-k\\\">do<\/span> wget -q -O- http:\/\/php-apache<span class=\\\"pl-k\\\">;<\/span> <span class=\\\"pl-k\\\">done<\/span><span class=\\\"pl-k\\\">;<\/span>\n<span class=\\\"pl-c\\\"># \u7b49\u5f85\u7ea65\u5206\u949f\u67e5\u770bhpa\u663e\u793a\u8d1f\u8f7d\u589e\u52a0\uff0c\u4e14\u526f\u672c\u6570\u76ee\u589e\u52a0\u4e3a4<\/span>\n$ kubectl get hpa php-apache\nNAME         REFERENCE               TARGETS      MINPODS   MAXPODS   REPLICAS   AGE\nphp-apache   Deployment\/php-apache   430% \/ 50%   1         10        4          4m\n<span class=\\\"pl-c\\\"># \u6ce8\u610fk8s\u4e3a\u4e86\u907f\u514d\u9891\u7e41\u589e\u5220pod\uff0c\u5bf9\u526f\u672c\u7684\u589e\u52a0\u901f\u5ea6\u6709\u9650\u5236<\/span>\n<span class=\\\"pl-c\\\"># \u5b9e\u9a8c\u8fc7\u7a0b\u53ef\u4ee5\u770b\u5230\u526f\u672c\u6570\u76ee\u4ece1\u52304\u52308\u523010\uff0c\u5927\u6982\u90fd\u9700\u89814~5\u5206\u949f\u7684\u7f13\u51b2\u671f<\/span>\n$ kubectl get hpa php-apache\nNAME         REFERENCE               TARGETS     MINPODS   MAXPODS   REPLICAS   AGE\nphp-apache   Deployment\/php-apache   86% \/ 50%   1         10        8          9m\n$ kubectl get hpa php-apache\nNAME         REFERENCE               TARGETS     MINPODS   MAXPODS   REPLICAS   AGE\nphp-apache   Deployment\/php-apache   52% \/ 50%   1         10        10         12m\n<span class=\\\"pl-c\\\"># \u6e05\u9664\u8d1f\u8f7d\uff0cCTRL+C \u7ed3\u675f\u4e0a\u8ff0\u5faa\u73af\u7a0b\u5e8f\uff0c\u7a0d\u540e\u526f\u672c\u6570\u76ee\u53d8\u56de1<\/span>\n$ kubectl get hpa php-apache\nNAME         REFERENCE               TARGETS    MINPODS   MAXPODS   REPLICAS   AGE\nphp-apache   Deployment\/php-apache   0% \/ 50%   1         10        1          17m<\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u81ea\u52a8\u6c34\u5e73\u4f38\u7f29\uff0c\u662f\u6307\u8fd0\u884c\u5728k8s\u4e0a\u7684\u5e94\u7528\u8d1f\u8f7d(POD)\uff0c\u53ef\u4ee5\u6839\u636e\u8d44\u6e90\u4f7f\u7528\u7387\u8fdb\u884c\u81ea\u52a8\u6269\u5bb9\u3001\u7f29\u5bb9\uff1b\u6211\u4eec\u77e5\u9053\u5e94\u7528\u7684\u8d44\u6e90 &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1609\"> <span class=\"screen-reader-text\">Horizontal Pod Autoscaling<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[104,123],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"\u81ea\u52a8\u6c34\u5e73\u4f38\u7f29\uff0c\u662f\u6307\u8fd0\u884c\u5728k8s\u4e0a\u7684\u5e94\u7528\u8d1f\u8f7d(POD)\uff0c\u53ef\u4ee5\u6839\u636e\u8d44\u6e90\u4f7f\u7528\u7387\u8fdb\u884c\u81ea\u52a8\u6269\u5bb9\u3001\u7f29\u5bb9\uff1b\u6211\u4eec\u77e5\u9053\u5e94\u7528\u7684\u8d44\u6e90&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1609"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1609"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1609\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1609"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1609"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}