{"id":1564,"date":"2020-06-09T13:50:25","date_gmt":"2020-06-09T05:50:25","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1564"},"modified":"2020-06-09T13:50:25","modified_gmt":"2020-06-09T05:50:25","slug":"kubernetes-labels-%e5%92%8c-selectors","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1564","title":{"rendered":"Kubernetes Labels \u548c Selectors"},"content":{"rendered":"<header class=\\\"entry-header\\\">\n<h1 class=\\\"entry-title\\\">Kubernetes Labels \u548c Selectors<\/h1>\n<\/header>\n<div class=\\\"entry-content\\\">\n<div id=\\\"toc_container\\\" class=\\\"no_bullets\\\">\n<ul class=\\\"toc_list\\\">\n<li><span class=\\\"toc_number toc_depth_1\\\">1<\/span>\u00a0Motivation<\/li>\n<li><span class=\\\"toc_number toc_depth_1\\\">2<\/span>\u00a0\u8bed\u6cd5\u548c\u5b57\u7b26\u96c6<\/li>\n<li><span class=\\\"toc_number toc_depth_1\\\">3<\/span>\u00a0Labels\u9009\u62e9\u5668\n<ul>\n<li><span class=\\\"toc_number toc_depth_2\\\">3.1<\/span>\u00a0Equality-based\u00a0requirement \u57fa\u4e8e\u76f8\u7b49\u7684\u8981\u6c42<\/li>\n<li><span class=\\\"toc_number toc_depth_2\\\">3.2<\/span>\u00a0Set-based\u00a0requirement<\/li>\n<\/ul>\n<\/li>\n<li><span class=\\\"toc_number toc_depth_1\\\">4<\/span>\u00a0API\n<ul>\n<li><span class=\\\"toc_number toc_depth_2\\\">4.1<\/span>\u00a0LIST\u548cWATCH\u8fc7\u6ee4<\/li>\n<li><span class=\\\"toc_number toc_depth_2\\\">4.2<\/span>\u00a0API\u5bf9\u8c61\u4e2d\u5f15\u7528\n<ul>\n<li><span class=\\\"toc_number toc_depth_3\\\">4.2.1<\/span>\u00a0Service\u548cReplicationController<\/li>\n<li><span class=\\\"toc_number toc_depth_3\\\">4.2.2<\/span>\u00a0\u652f\u6301set-based\u8981\u6c42\u7684\u8d44\u6e90<\/li>\n<li><span class=\\\"toc_number toc_depth_3\\\">4.2.3<\/span>\u00a0Selecting sets of nodes<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<p>Labels\u5176\u5b9e\u5c31\u4e00\u5bf9 key\/value \uff0c\u88ab\u5173\u8054\u5230\u5bf9\u8c61\u4e0a\uff0c\u6807\u7b7e\u7684\u4f7f\u7528\u6211\u4eec\u503e\u5411\u4e8e\u80fd\u591f\u6807\u793a\u5bf9\u8c61\u7684\u7279\u6b8a\u7279\u70b9\uff0c\u5e76\u4e14\u5bf9\u7528\u6237\u800c\u8a00\u662f\u6709\u610f\u4e49\u7684\uff0c\u4f46\u662f\u6807\u7b7e\u5bf9\u5185\u6838\u7cfb\u7edf\u662f\u6ca1\u6709\u76f4\u63a5\u610f\u4e49\u7684\u3002\u6807\u7b7e\u53ef\u4ee5\u7528\u6765\u5212\u5206\u7279\u5b9a\u7ec4\u7684\u5bf9\u8c61\uff08\u6bd4\u5982\uff0c\u6240\u6709\u5973\u7684\uff09\uff0c\u6807\u7b7e\u53ef\u4ee5\u5728\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u7684\u65f6\u5019\u76f4\u63a5\u7ed9\u4e0e\uff0c\u4e5f\u53ef\u4ee5\u5728\u540e\u671f\u968f\u65f6\u4fee\u6539\uff0c\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u53ef\u4ee5\u62e5\u6709\u591a\u4e2a\u6807\u7b7e\uff0c\u4f46\u662f\uff0ckey\u503c\u5fc5\u987b\u662f\u552f\u4e00\u7684<\/p>\n<div>\n<pre>\\\"labels\\\": {\n  \\\"key1\\\" : \\\"value1\\\",\n  \\\"key2\\\" : \\\"value2\\\"\n}\n<\/pre>\n<\/div>\n<p>\u6211\u4eec\u6700\u7ec8\u4f1a\u7d22\u5f15\u5e76\u4e14\u53cd\u5411\u7d22\u5f15\uff08reverse-index\uff09labels\uff0c\u4ee5\u83b7\u5f97\u66f4\u9ad8\u6548\u7684\u67e5\u8be2\u548c\u76d1\u89c6\uff0c\u628a\u4ed6\u4eec\u7528\u5230UI\u6216\u8005CLI\u4e2d\u7528\u6765\u6392\u5e8f\u6216\u8005\u5206\u7ec4\u7b49\u7b49\u3002\u6211\u4eec\u4e0d\u60f3\u7528\u90a3\u4e9b\u4e0d\u5177\u6709\u6307\u8ba4\u6548\u679c\u7684label\u6765\u6c61\u67d3label\uff0c\u7279\u522b\u662f\u90a3\u4e9b\u4f53\u79ef\u8f83\u5927\u548c\u7ed3\u6784\u578b\u7684\u7684\u6570\u636e\u3002\u4e0d\u5177\u6709\u6307\u8ba4\u6548\u679c\u7684\u4fe1\u606f\u5e94\u8be5\u4f7f\u7528annotation\u6765\u8bb0\u5f55\u3002<\/p>\n<h2><span id=\\\"Motivation\\\">Motivation<\/span><\/h2>\n<p>Labels\u53ef\u4ee5\u8ba9\u7528\u6237\u5c06\u4ed6\u4eec\u81ea\u5df1\u7684\u6709\u7ec4\u7ec7\u76ee\u7684\u7684\u7ed3\u6784\u4ee5\u4e00\u79cd\u677e\u8026\u5408\u7684\u65b9\u5f0f\u5e94\u7528\u5230\u7cfb\u7edf\u7684\u5bf9\u8c61\u4e0a\uff0c\u4e14\u4e0d\u9700\u8981\u5ba2\u6237\u7aef\u5b58\u653e\u8fd9\u4e9b\u5bf9\u5e94\u5173\u7cfb\uff08mappings\uff09\u3002<br \/>\n\u670d\u52a1\u90e8\u7f72\u548c\u6279\u5904\u7406\u7ba1\u9053\u901a\u5e38\u662f\u591a\u7ef4\u7684\u5b9e\u4f53\uff08\u4f8b\u5982\u591a\u4e2a\u5206\u533a\u6216\u8005\u90e8\u7f72\uff0c\u591a\u4e2a\u53d1\u5e03\u8f68\u9053\uff0c\u591a\u5c42\uff0c\u6bcf\u5c42\u591a\u5fae\u670d\u52a1\uff09\u3002\u7ba1\u7406\u901a\u5e38\u9700\u8981\u8de8\u8d8a\u5f0f\u7684\u5207\u5272\u64cd\u4f5c\uff0c\u8fd9\u4f1a\u6253\u7834\u6709\u4e25\u683c\u5c42\u7ea7\u5c55\u793a\u5173\u7cfb\u7684\u5c01\u88c5\uff0c\u7279\u522b\u5bf9\u90a3\u4e9b\u662f\u7531\u57fa\u7840\u8bbe\u65bd\u800c\u975e\u7528\u6237\u51b3\u5b9a\u7684\u5f88\u6b7b\u677f\u7684\u5c42\u7ea7\u5173\u7cfb\u3002<br \/>\n\u793a\u4f8b\u6807\u7b7e\uff1a<\/p>\n<ul>\n<li>\\&#8221;release\\&#8221; : \\&#8221;stable\\&#8221;\uff0c\u00a0\\&#8221;release\\&#8221; : \\&#8221;canary\\&#8221;<\/li>\n<li>\\&#8221;environment\\&#8221; : \\&#8221;dev\\&#8221;\uff0c\\&#8221;environment\\&#8221; : \\&#8221;qa\\&#8221;\uff0c\\&#8221;environment\\&#8221; : \\&#8221;production\\&#8221;<\/li>\n<li>\\&#8221;tier\\&#8221; : \\&#8221;frontend\\&#8221;\uff0c\\&#8221;tier\\&#8221; : \\&#8221;backend\\&#8221;\uff0c\\&#8221;tier\\&#8221; : \\&#8221;cache\\&#8221;<\/li>\n<li>\\&#8221;partition\\&#8221; : \\&#8221;customerA\\&#8221;\uff0c\u00a0\\&#8221;partition\\&#8221; : \\&#8221;customerB\\&#8221;<\/li>\n<li>\\&#8221;track\\&#8221; : \\&#8221;daily\\&#8221;\uff0c\u00a0\\&#8221;track\\&#8221; : \\&#8221;weekly\\&#8221;<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u53ea\u662f\u5e38\u7528Labels\u7684\u4f8b\u5b50\uff0c\u4f60\u53ef\u4ee5\u6309\u81ea\u5df1\u4e60\u60ef\u6765\u5b9a\u4e49\uff0c\u9700\u8981\u6ce8\u610f\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u7684\u6807\u7b7ekey\u5177\u6709\u552f\u4e00\u6027\u3002<\/p>\n<h2 id=\\\"syntax-and-character-set\\\"><span id=\\\"i\\\">\u8bed\u6cd5\u548c\u5b57\u7b26\u96c6<\/span><\/h2>\n<p>Label\u5176\u5b9e\u662f\u4e00\u5bf9 key\/value\u3002\u6709\u6548\u7684\u6807\u7b7e\u952e\u6709\u4e24\u4e2a\u6bb5\uff1a\u53ef\u9009\u7684\u524d\u7f00\u548c\u540d\u79f0\uff0c\u7528\u659c\u6760\uff08\/\uff09\u5206\u9694\uff0c\u540d\u79f0\u6bb5\u662f\u5fc5\u9700\u7684\uff0c\u6700\u591a63\u4e2a\u5b57\u7b26\uff0c\u4ee5[a-z0-9A-Z]\u5e26\u6709\u865a\u7ebf\uff08-\uff09\u3001\u4e0b\u5212\u7ebf\uff08_\uff09\u3001\u70b9\uff08.\uff09\u548c\u5f00\u5934\u548c\u7ed3\u5c3e\u5fc5\u987b\u662f\u5b57\u6bcd\u6216\u6570\u5b57\uff08\u90fd\u662f\u5b57\u7b26\u4e32\u5f62\u5f0f\uff09\u7684\u5f62\u5f0f\u7ec4\u6210\u3002\u524d\u7f00\u662f\u53ef\u9009\u7684\u3002\u5982\u679c\u6307\u5b9a\u4e86\u524d\u7f00\uff0c\u90a3\u4e48\u5fc5\u987b\u662fDNS\u5b50\u57df\uff1a\u4e00\u7cfb\u5217\u7684DNSlabel\u901a\u8fc7\u201d.\u201d\u6765\u5212\u5206\uff0c\u4e0d\u8d85\u8fc7253\u4e2a\u5b57\u7b26\uff0c\u4ee5\u659c\u6760\uff08\/\uff09\u7ed3\u5c3e\u3002\u5982\u679c\u524d\u7f00\u88ab\u7701\u7565\u4e86\uff0c\u8fd9\u4e2aLabel\u7684key\u88ab\u5047\u5b9a\u4e3a\u5bf9\u7528\u6237\u79c1\u6709\u7684\u3002\u81ea\u52a8\u5316\u7cfb\u7edf\u7ec4\u4ef6\u6709\uff08\u4f8b\u5982kube-scheduler\uff0ckube-controller-manager\uff0ckube-apiserver\uff0ckubectl\uff0c\u6216\u5176\u4ed6\u7b2c\u4e09\u65b9\u81ea\u52a8\u5316\uff09\uff0c\u8fd9\u4e9b\u6dfb\u52a0\u6807\u7b7e\u7ec8\u7aef\u7528\u6237\u5bf9\u8c61\u90fd\u5fc5\u987b\u6307\u5b9a\u4e00\u4e2a\u524d\u7f00\u3002Kuberentes.io \u524d\u7f00\u662f\u4e3aKubernetes \u5185\u6838\u90e8\u5206\u4fdd\u7559\u7684\u3002<br \/>\n\u6709\u6548\u7684\u6807\u7b7e\u503c\u6700\u957f\u4e3a63\u4e2a\u5b57\u7b26\u3002\u8981\u4e48\u4e3a\u7a7a\uff0c\u8981\u4e48\u4f7f\u7528[a-z0-9A-Z]\u5e26\u6709\u865a\u7ebf\uff08-\uff09\u3001\u4e0b\u5212\u7ebf\uff08_\uff09\u3001\u70b9\uff08.\uff09\u548c\u5f00\u5934\u548c\u7ed3\u5c3e\u5fc5\u987b\u662f\u5b57\u6bcd\u6216\u6570\u5b57\uff08\u90fd\u662f\u5b57\u7b26\u4e32\u5f62\u5f0f\uff09\u7684\u5f62\u5f0f\u7ec4\u6210\u3002<\/p>\n<h2 id=\\\"label-selectors\\\"><span id=\\\"Labels\\\">Labels\u9009\u62e9\u5668<\/span><\/h2>\n<p>\u4e0eName\u548cUID\u00a0\u4e0d\u540c\uff0c\u6807\u7b7e\u4e0d\u9700\u8981\u6709\u552f\u4e00\u6027\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u6211\u4eec\u671f\u671b\u8bb8\u591a\u5bf9\u8c61\u5177\u6709\u76f8\u540c\u7684\u6807\u7b7e\u3002<br \/>\n\u901a\u8fc7\u6807\u7b7e\u9009\u62e9\u5668\uff08Labels Selectors\uff09\uff0c\u5ba2\u6237\u7aef\/\u7528\u6237 \u80fd\u65b9\u4fbf\u8fa8\u8bc6\u51fa\u4e00\u7ec4\u5bf9\u8c61\u3002\u6807\u7b7e\u9009\u62e9\u5668\u662fkubernetes\u4e2d\u6838\u5fc3\u7684\u7ec4\u6210\u90e8\u5206\u3002<br \/>\nAPI\u76ee\u524d\u652f\u6301\u4e24\u79cd\u9009\u62e9\u5668\uff1aequality-based\uff08\u57fa\u4e8e\u5e73\u7b49\uff09\u548cset-based\uff08\u57fa\u4e8e\u96c6\u5408\uff09\u7684\u3002\u6807\u7b7e\u9009\u62e9\u5668\u53ef\u4ee5\u7531\u9017\u53f7\u5206\u9694\u7684\u591a\u4e2arequirements\u00a0\u7ec4\u6210\u3002\u5728\u591a\u91cd\u9700\u6c42\u7684\u60c5\u51b5\u4e0b\uff0c\u5fc5\u987b\u6ee1\u8db3\u6240\u6709\u8981\u6c42\uff0c\u56e0\u6b64\u9017\u53f7\u5206\u9694\u7b26\u4f5c\u4e3aAND\u903b\u8f91\u8fd0\u7b97\u7b26\u3002<br \/>\n\u4e00\u4e2a\u4e3a\u7a7a\u7684\u6807\u7b7e\u9009\u62e9\u5668\uff08\u5373\u67090\u4e2a\u5fc5\u987b\u6761\u4ef6\u7684\u9009\u62e9\u5668\uff09\u4f1a\u9009\u62e9\u96c6\u5408\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u3002<br \/>\n\u4e00\u4e2anull\u578b\u6807\u7b7e\u9009\u62e9\u5668\uff08\u4ec5\u5bf9\u4e8e\u53ef\u9009\u7684\u9009\u62e9\u5668\u5b57\u6bb5\u624d\u53ef\u80fd\uff09\u4e0d\u4f1a\u8fd4\u56de\u4efb\u4f55\u5bf9\u8c61\u3002<br \/>\n\u6ce8\u610f\uff1a\u4e24\u4e2a\u63a7\u5236\u5668\u7684\u6807\u7b7e\u9009\u62e9\u5668\u4e0d\u80fd\u5728\u547d\u540d\u7a7a\u95f4\u4e2d\u91cd\u53e0\u3002<\/p>\n<h3 id=\\\"equality-based-requirement\\\"><span id=\\\"Equality-basedrequirement\\\">Equality-based\u00a0requirement \u57fa\u4e8e\u76f8\u7b49\u7684\u8981\u6c42<\/span><\/h3>\n<p>\u57fa\u4e8e\u76f8\u7b49\u7684\u6216\u8005\u4e0d\u76f8\u7b49\u7684\u6761\u4ef6\u5141\u8bb8\u7528\u6807\u7b7e\u7684keys\u548cvalues\u8fdb\u884c\u8fc7\u6ee4\u3002\u5339\u914d\u7684\u5bf9\u8c61\u5fc5\u987b\u6ee1\u8db3\u6240\u6709\u6307\u5b9a\u7684\u6807\u7b7e\u7ea6\u675f\uff0c\u5c3d\u7ba1\u4ed6\u4eec\u53ef\u80fd\u4e5f\u6709\u989d\u5916\u7684\u6807\u7b7e\u3002\u6709\u4e09\u79cd\u8fd0\u7b97\u7b26\u662f\u5141\u8bb8\u7684\uff0c\u201c=\u201d\uff0c\u201c==\u201d\u548c\u201c!=\u201d\u3002\u524d\u4e24\u79cd\u4ee3\u8868\u76f8\u7b49\u6027\uff08\u4ed6\u4eec\u662f\u540c\u4e49\u8fd0\u7b97\u7b26\uff09\uff0c\u540e\u4e00\u79cd\u4ee3\u8868\u975e\u76f8\u7b49\u6027\u3002\u4f8b\u5982\uff1a<\/p>\n<div>\n<pre>environment = production\ntier != frontend<\/pre>\n<\/div>\n<p>\u7b2c\u4e00\u4e2a\u9009\u62e9\u6240\u6709key\u7b49\u4e8e environment \u503c\u4e3a production \u7684\u8d44\u6e90\u3002\u540e\u4e00\u79cd\u9009\u62e9\u6240\u6709key\u4e3a tier \u503c\u4e0d\u7b49\u4e8e frontend \u7684\u8d44\u6e90\uff0c\u548c\u90a3\u4e9b\u6ca1\u6709key\u4e3a tier \u7684label\u7684\u8d44\u6e90\u3002\u8981\u8fc7\u6ee4\u6240\u6709\u5904\u4e8e production \u4f46\u4e0d\u662f frontend \u7684\u8d44\u6e90\uff0c\u53ef\u4ee5\u4f7f\u7528\u9017\u53f7\u64cd\u4f5c\u7b26\uff0c<\/p>\n<pre>frontend\uff1aenvironment=production,tier!=frontend<\/pre>\n<h3 id=\\\"set-based-requirement\\\"><span id=\\\"Set-basedrequirement\\\">Set-based\u00a0requirement<\/span><\/h3>\n<p>Set-based\u00a0\u7684\u6807\u7b7e\u6761\u4ef6\u5141\u8bb8\u7528\u4e00\u7ec4value\u6765\u8fc7\u6ee4key\u3002\u652f\u6301\u4e09\u79cd\u64cd\u4f5c\u7b26: in \uff0c notin \u548c exists(\u4ec5\u9488\u5bf9\u4e8ekey\u7b26\u53f7) \u3002\u4f8b\u5982\uff1a<\/p>\n<div>\n<pre>environment in (production, qa)\ntier notin (frontend, backend)\npartition\n!partition\n<\/pre>\n<\/div>\n<p>\u7b2c\u4e00\u4e2a\u4f8b\u5b50\uff0c\u9009\u62e9\u6240\u6709key\u7b49\u4e8e environment \uff0c\u4e14value\u7b49\u4e8e production \u6216\u8005 qa \u7684\u8d44\u6e90\u3002 \u7b2c\u4e8c\u4e2a\u4f8b\u5b50\uff0c\u9009\u62e9\u6240\u6709key\u7b49\u4e8e tier \u4e14\u503c\u662f\u9664\u4e86 frontend \u548c backend \u4e4b\u5916\u7684\u8d44\u6e90\uff0c\u548c\u90a3\u4e9b\u6ca1\u6709\u6807\u7b7e\u7684key\u662f tier \u7684\u8d44\u6e90\u3002 \u7b2c\u4e09\u4e2a\u4f8b\u5b50\uff0c\u9009\u62e9\u6240\u6709\u6709\u4e00\u4e2a\u6807\u7b7e\u7684key\u4e3apartition\u7684\u8d44\u6e90\uff1bvalue\u662f\u4ec0\u4e48\u4e0d\u4f1a\u88ab\u68c0\u67e5\u3002 \u7b2c\u56db\u4e2a\u4f8b\u5b50\uff0c\u9009\u62e9\u6240\u6709\u7684\u6ca1\u6709lable\u7684key\u540d\u4e3a partition \u7684\u8d44\u6e90\uff1bvalue\u662f\u4ec0\u4e48\u4e0d\u4f1a\u88ab\u68c0\u67e5\u3002<br \/>\n\u7c7b\u4f3c\u7684\uff0c\u9017\u53f7\u64cd\u4f5c\u7b26\u76f8\u5f53\u4e8e\u4e00\u4e2aAND\u64cd\u4f5c\u7b26\u3002\u56e0\u800c\u8981\u4f7f\u7528\u4e00\u4e2a partition \u952e\uff08\u4e0d\u7ba1value\u662f\u4ec0\u4e48\uff09\uff0c\u5e76\u4e14 environment \u4e0d\u662f qa \u8fc7\u6ee4\u8d44\u6e90\u53ef\u4ee5\u7528 partition,environment notin (qa) \u3002<br \/>\nSet-based\u00a0\u7684\u9009\u62e9\u5668\u662f\u4e00\u4e2a\u76f8\u7b49\u6027\u7684\u5bbd\u6cdb\u7684\u5f62\u5f0f\uff0c\u56e0\u4e3a environment=production \u76f8\u5f53\u4e8eenvironment in (production) \uff0c\u4e0e != and notin \u7c7b\u4f3c\u3002<br \/>\nSet-based\u7684\u6761\u4ef6\u53ef\u4ee5\u4e0eEquality-based\u7684\u6761\u4ef6\u7ed3\u5408\u3002\u4f8b\u5982\uff0c partition in (customerA,customerB),environment!=qa \u3002<\/p>\n<h2 id=\\\"api\\\"><span id=\\\"API\\\">API<\/span><\/h2>\n<h3 id=\\\"list-and-watch-filtering\\\"><span id=\\\"LISTWATCH\\\">LIST\u548cWATCH\u8fc7\u6ee4<\/span><\/h3>\n<p>LIST\u548cWATCH\u64cd\u4f5c\u53ef\u4ee5\u6307\u5b9a\u6807\u7b7e\u9009\u62e9\u5668\u6765\u8fc7\u6ee4\u4f7f\u7528\u67e5\u8be2\u53c2\u6570\u8fd4\u56de\u7684\u5bf9\u8c61\u96c6\u3002\u8fd9\u4e24\u4e2a\u8981\u6c42\u90fd\u662f\u5141\u8bb8\u7684\uff08\u5728\u8fd9\u91cc\u7ed9\u51fa\uff0c\u5b83\u4eec\u4f1a\u51fa\u73b0\u5728URL\u67e5\u8be2\u5b57\u7b26\u4e32\u4e2d\uff09\uff1a<br \/>\nLIST\u548cWATCH\u64cd\u4f5c\uff0c\u53ef\u4ee5\u4f7f\u7528query\u53c2\u6570\u6765\u6307\u5b9alabel\u9009\u62e9\u5668\u6765\u8fc7\u6ee4\u8fd4\u56de\u5bf9\u8c61\u7684\u96c6\u5408\u3002\u4e24\u79cd\u6761\u4ef6\u90fd\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<ul>\n<li>Set-based\u7684\u8981\u6c42\uff1a?labelSelector=environment%3Dproduction,tier%3Dfrontend<\/li>\n<li>Equality-based\u7684\u8981\u6c42\uff1a?labelSelector=environment+in+%28production%2Cqa%29%2Ctier+in+%28frontend%29<\/li>\n<\/ul>\n<p>\u4e24\u4e2a\u6807\u7b7e\u9009\u62e9\u5668\u6837\u5f0f\u90fd\u53ef\u7528\u4e8e\u901a\u8fc7REST\u5ba2\u6237\u7aef\u5217\u51fa\u6216\u89c2\u770b\u8d44\u6e90\u3002\u4f8b\u5982\uff0capiserver\u4f7f\u7528kubectl\u548c\u4f7f\u7528\u57fa\u4e8e\u5e73\u7b49\u7684\u4eba\u53ef\u4ee5\u5199\uff1a<br \/>\n\u4e24\u79cd\u6807\u7b7e\u9009\u62e9\u5668\u6837\u5f0f\uff0c\u90fd\u53ef\u4ee5\u901a\u8fc7REST\u5ba2\u6237\u7aef\u6765list\u6216watch\u8d44\u6e90\u3002\u6bd4\u5982\u4f7f\u7528 kubectl \u6765\u9488\u5bf9 apiserver \uff0c\u5e76\u4e14\u4f7f\u7528Equality-based\u7684\u6761\u4ef6\uff0c\u53ef\u4ee5\u7528\uff1a<\/p>\n<div>\n<pre>$ kubectl get pods -l environment=production,tier=frontend\n<\/pre>\n<\/div>\n<p>\u6216\u4f7f\u7528Set-based\u00a0\u8981\u6c42\uff1a<\/p>\n<div>\n<pre>$ kubectl get pods -l \\'environment in (production),tier in (frontend)\\'\n<\/pre>\n<\/div>\n<p>\u5982\u5df2\u7ecf\u63d0\u5230\u7684Set-based\u8981\u6c42\u66f4\u5177\u8868\u73b0\u529b\u3002\u4f8b\u5982\uff0c\u5b83\u4eec\u53ef\u4ee5\u5bf9value\u6267\u884cOR\u8fd0\u7b97\uff1a<\/p>\n<div>\n<pre>$ kubectl get pods -l \\'environment in (production, qa)\\'\n<\/pre>\n<\/div>\n<p>\u6216\u8005\u901a\u8fc7exists\u64cd\u4f5c\u7b26\u8fdb\u884c\u5426\u5b9a\u9650\u5236\u5339\u914d\uff1a<\/p>\n<div>\n<pre>$ kubectl get pods -l \\'environment,environment notin (frontend)\\'\n<\/pre>\n<\/div>\n<h3 id=\\\"set-references-in-api-objects\\\"><span id=\\\"API-2\\\">API\u5bf9\u8c61\u4e2d\u5f15\u7528<\/span><\/h3>\n<p>\u4e00\u4e9bKubernetes\u5bf9\u8c61\uff0c\u4f8b\u5982services\u548creplicationcontrollers\uff0c\u4e5f\u4f7f\u7528\u6807\u7b7e\u9009\u62e9\u5668\u6765\u6307\u5b9a\u5176\u4ed6\u8d44\u6e90\u7684\u96c6\u5408\uff0c\u5982pod\u3002<\/p>\n<h4><span id=\\\"ServiceReplicationController\\\">Service\u548cReplicationController<\/span><\/h4>\n<p>\u4e00\u4e2aservice\u9488\u5bf9\u7684pods\u7684\u96c6\u5408\u662f\u7528\u6807\u7b7e\u9009\u62e9\u5668\u6765\u5b9a\u4e49\u7684\u3002\u7c7b\u4f3c\u7684\uff0c\u4e00\u4e2areplicationcontroller\u7ba1\u7406\u7684pods\u7684\u7fa4\u4f53\u4e5f\u662f\u7528\u6807\u7b7e\u9009\u62e9\u5668\u6765\u5b9a\u4e49\u7684\u3002<br \/>\n\u5bf9\u4e8e\u8fd9\u4e24\u79cd\u5bf9\u8c61\u7684Label\u9009\u62e9\u5668\u662f\u7528map\u5b9a\u4e49\u5728json\u6216\u8005yaml\u6587\u4ef6\u4e2d\u7684\uff0c\u5e76\u4e14\u53ea\u652f\u6301Equality-based\u7684\u6761\u4ef6\uff1a<\/p>\n<div>\n<pre>\\\"selector\\\": {\n    \\\"component\\\" : \\\"redis\\\",\n}\n<\/pre>\n<\/div>\n<p>\u8981\u4e48<\/p>\n<div>\n<pre>selector:\n    component: redis\n<\/pre>\n<\/div>\n<p>\u6b64\u9009\u62e9\u5668\uff08\u5206\u522b\u4e3ajson\u6216yaml\u683c\u5f0f\uff09\u7b49\u540c\u4e8ecomponent=redis\u6216component in (redis)\u3002<\/p>\n<h4><span id=\\\"set-based\\\">\u652f\u6301set-based\u8981\u6c42\u7684\u8d44\u6e90<\/span><\/h4>\n<p>Job\uff0cDeployment\uff0cReplica Set\uff0c\u548cDaemon Set\uff0c\u652f\u6301set-based\u8981\u6c42\u3002<\/p>\n<div>\n<pre>selector:\n  matchLabels:\n    component: redis\n  matchExpressions:\n    - {key: tier, operator: In, values: [cache]}\n    - {key: environment, operator: NotIn, values: [dev]}<\/pre>\n<\/div>\n<p>matchLabels \u662f\u4e00\u4e2a{key,value}\u7684\u6620\u5c04\u3002\u4e00\u4e2a\u5355\u72ec\u7684 {key,value} \u76f8\u5f53\u4e8e matchExpressions \u7684\u4e00\u4e2a\u5143\u7d20\uff0c\u5b83\u7684key\u5b57\u6bb5\u662f\u201dkey\u201d,\u64cd\u4f5c\u7b26\u662f In \uff0c\u5e76\u4e14value\u6570\u7ec4value\u5305\u542b\u201dvalue\u201d\u3002 matchExpressions \u662f\u4e00\u4e2apod\u7684\u9009\u62e9\u5668\u6761\u4ef6\u7684list\u00a0\u3002\u6709\u6548\u8fd0\u7b97\u7b26\u5305\u542bIn, NotIn, Exists, \u548cDoesNotExist\u3002\u5728In\u548cNotIn\u7684\u60c5\u51b5\u4e0b\uff0cvalue\u7684\u7ec4\u5fc5\u987b\u4e0d\u80fd\u4e3a\u7a7a\u3002\u6240\u6709\u7684\u6761\u4ef6\uff0c\u5305\u542b matchLabels andmatchExpressions \u4e2d\u7684\uff0c\u4f1a\u7528AND\u7b26\u53f7\u8fde\u63a5\uff0c\u4ed6\u4eec\u5fc5\u987b\u90fd\u88ab\u6ee1\u8db3\u4ee5\u5b8c\u6210\u5339\u914d\u3002\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Kubernetes Labels \u548c Selectors 1\u00a0Motivation 2\u00a0\u8bed\u6cd5\u548c\u5b57\u7b26\u96c6 3\u00a0L &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1564\"> <span class=\"screen-reader-text\">Kubernetes Labels \u548c Selectors<\/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":"Kubernetes Labels \u548c Selectors 1\u00a0Motivation 2\u00a0\u8bed\u6cd5\u548c\u5b57\u7b26\u96c6 3\u00a0L&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1564"}],"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=1564"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1564\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1564"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}