{"id":951,"date":"2021-07-13T21:29:25","date_gmt":"2021-07-13T13:29:25","guid":{"rendered":"https:\/\/www.myway5.com\/?p=951"},"modified":"2023-07-05T10:07:06","modified_gmt":"2023-07-05T02:07:06","slug":"kube-proxy-iptables","status":"publish","type":"post","link":"https:\/\/www.myway5.com\/index.php\/2021\/07\/13\/kube-proxy-iptables\/","title":{"rendered":"kube-proxy iptables \u6d41\u91cf\u5904\u7406\u6d41\u7a0b"},"content":{"rendered":"<p>kube-proxy \u5728 iptables \u6a21\u5f0f\u4e0b\uff0c\u4e3b\u8981\u662f\u901a\u8fc7\u4f7f\u7528 iptables \u63d0\u4f9b\u4ece service \u5230 pod \u7684\u8bbf\u95ee\u3002\u4e3b\u8981\u4f5c\u7528\u5728\u4e24\u4e2a\u8868\u4e0a\uff1a<\/p>\n<ul>\n<li>NAT\uff1a\u8bbf\u95ee service \u65f6\uff0c\u9700\u8981 DNAT \u5230 pod IP \u4e0a<\/li>\n<li>Filter: \u5bf9\u6d41\u91cf\u505a\u8fc7\u6ee4\uff0c\u6bd4\u5982\u5982\u679c\u4e00\u4e2a service \u6ca1\u6709 endpoints\uff0c\u5c31\u76f4\u63a5 REJECT \u6389\u8bbf\u95ee cluster IP \u7684\u6d41\u91cf\u7b49\u3002<\/li>\n<\/ul>\n<p>NAT \u4e3b\u8981\u4f5c\u7528\u5728\u4e09\u4e2a\u5173\u952e\u70b9\uff1a<\/p>\n<ul>\n<li>PREROUTING: \u5728\u8fd9\u91cc\u4e3a\u8fdb\u5165 node \u6d41\u91cf\u8fdb\u884c\u5904\u7406\uff0c\u5982\u679c\u662f\u8bbf\u95ee service\uff0c\u5219\u9009\u62e9\u4e00\u4e2a\u540e\u7aef pod DNAT\uff0c\u5e76\u5728\u6d41\u91cf\u4e0a\u505a\u6807\u8bb0<\/li>\n<li>OUTPUT: \u5728\u8fd9\u91cc\u4e3a\u4ece\u672c\u673a\u8fdb\u7a0b\u51fa\u6765\u7684\u6d41\u91cf\u8fdb\u884c\u5904\u7406\uff0c\u5982\u679c\u662f\u8bbf\u95ee service\uff0c\u5219\u9009\u62e9\u4e00\u4e2a\u540e\u7aef pod DNAT\uff0c\u5e76\u5728\u6d41\u91cf\u4e0a\u505a\u6807\u8bb0\u3002<\/li>\n<li>POSTROUTING: \u4e3a\u505a\u4e86\u6807\u8bb0\u7684\u6d41\u91cf\u505a MASQUERADE\uff0cMASQUIERADE \u53ef\u4ee5\u7406\u89e3\u4e3a\u52a0\u5f3a\u7248\u7684 SNAT\uff0c\u4f1a\u81ea\u52a8\u6839\u636e\u51fa\u53bb\u7684\u7f51\u5361\u9009\u62e9 src IP\u3002<\/li>\n<\/ul>\n<p>Filter \u4e3b\u8981\u4f5c\u7528\u5728\u4e09\u4e2a\u70b9\uff1a<\/p>\n<ul>\n<li>INPUT: \u53d1\u5f80\u672c\u673a\u7684\u6d41\u91cf<\/li>\n<li>FORWARD: \u8f6c\u53d1\u5230\u5176\u4ed6 host \u7684\u6d41\u91cf<\/li>\n<li>OUTPUT: \u4ece\u672c\u673a\u8fdb\u7a0b\u51fa\u53bb\u7684\u6d41\u91cf<\/li>\n<\/ul>\n<p>\u5206\u6790 kube-proxy iptables \u65f6\uff0c\u4e3b\u8981\u5c31\u662f\u4ece\u4e0a\u8ff0\u7684\u51e0\u4e2a\u70b9\u53bb\u770b\uff0ciptables \u89c4\u5219\u672c\u8eab\u6bd4\u8f83\u67af\u71e5\uff0c\u6ca1\u6709\u592a\u591a\u53ef\u8bf4\u7684\u3002\u4e0b\u9762\u662f\u6574\u7406\u7684 kube-proxy \u4f7f\u7528 iptables \u7684\u6d41\u91cf\u5904\u7406\u6d41\u7a0b\u3002\u53ef\u4ee5\u7528\u6765\u4f5c\u53c2\u8003\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2021\/07\/iptables-flow.jpg\" alt=\"kube-proxy-iptables\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>kube-proxy \u5728 iptables \u6a21\u5f0f\u4e0b\uff0c\u4e3b\u8981\u662f\u901a\u8fc7\u4f7f\u7528 iptables \u63d0\u4f9b\u4ece service  &hellip; <a href=\"https:\/\/www.myway5.com\/index.php\/2021\/07\/13\/kube-proxy-iptables\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">kube-proxy iptables \u6d41\u91cf\u5904\u7406\u6d41\u7a0b<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[89,3],"tags":[],"class_list":["post-951","post","type-post","status-publish","format-standard","hentry","category-k8s","category-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - 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