{"id":35774,"date":"2025-03-19T10:36:05","date_gmt":"2025-03-19T02:36:05","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=35774"},"modified":"2025-03-19T10:36:05","modified_gmt":"2025-03-19T02:36:05","slug":"ebpf%e5%a6%82%e4%bd%95%e5%b8%ae%e5%8a%a9%e5%bc%80%e5%8f%91%e8%80%85%e5%ae%9e%e7%8e%b0%e9%ab%98%e6%95%88%e7%9a%84%e7%b3%bb%e7%bb%9f%e9%9a%94%e7%a6%bb%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/35774.html","title":{"rendered":"eBPF\u5982\u4f55\u5e2e\u52a9\u5f00\u53d1\u8005\u5b9e\u73b0\u9ad8\u6548\u7684\u7cfb\u7edf\u9694\u79bb\uff1f"},"content":{"rendered":"<p style=\"text-align: center;\">\n<p><img decoding=\"async\" src=\"https:\/\/www.yunshan.net\/blog\/wp-content\/uploads\/2025\/03\/4GLW4nJ98.jpg\" alt=\"eBPF\u5982\u4f55\u5e2e\u52a9\u5f00\u53d1\u8005\u5b9e\u73b0\u9ad8\u6548\u7684\u7cfb\u7edf\u9694\u79bb\uff1f\" ><\/p>\n<\/p>\n<p>\u5728\u4e91\u539f\u751f\u4e0e\u5fae\u670d\u52a1\u67b6\u6784\u5e2d\u5377\u6280\u672f\u9886\u57df\u7684\u4eca\u5929\uff0c&rdquo;\u9694\u79bb&rdquo;\u5df2\u6210\u4e3a\u6784\u5efa\u53ef\u9760\u7cfb\u7edf\u7684\u6838\u5fc3\u547d\u9898\u3002\u4ece\u5bb9\u5668\u8fd0\u884c\u65f6\u5230\u670d\u52a1\u7f51\u683c\uff0c\u5f00\u53d1\u56e2\u961f\u4e0d\u65ad\u5728\u5b89\u5168\u8fb9\u754c\u4e0e\u6027\u80fd\u635f\u8017\u4e4b\u95f4\u5bfb\u627e\u5e73\u8861\u70b9\u3002\u4f20\u7edf\u65b9\u6848\u5f80\u5f80\u9677\u5165\u4e24\u96be\u56f0\u5883\u2014\u2014\u8981\u4e48\u627f\u53d7\u9ad8\u6602\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u4ee3\u4ef7\uff0c\u8981\u4e48\u5728\u5b89\u5168\u6027\u4e0a\u505a\u51fa\u59a5\u534f\u3002<strong><a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\u6280\u672f\u7684\u51fa\u73b0\uff0c\u6b63\u5728\u7528\u9769\u547d\u6027\u7684\u5185\u6838\u53ef\u7f16\u7a0b\u80fd\u529b\u91cd\u65b0\u5b9a\u4e49\u7cfb\u7edf\u9694\u79bb\u7684\u5b9e\u8df5\u8303\u5f0f<\/strong>\u3002\u8fd9\u9879\u8d77\u6e90\u4e8e\u4f2f\u514b\u5229\u5305\u8fc7\u6ee4\u673a\u5236\u7684\u6280\u672f\uff0c\u901a\u8fc7\u5728\u5185\u6838\u865a\u62df\u673a\u4e2d\u5b89\u5168\u5730\u6267\u884c\u7528\u6237\u5b9a\u4e49\u7a0b\u5e8f\uff0c\u4f7f\u5f97\u5f00\u53d1\u8005\u80fd\u591f\u5728\u65e0\u9700\u4fee\u6539\u5185\u6838\u6e90\u7801\u7684\u524d\u63d0\u4e0b\uff0c\u5b9e\u73b0\u5bf9\u7cfb\u7edf\u884c\u4e3a\u7684\u7ec6\u7c92\u5ea6\u89c2\u6d4b\u4e0e\u63a7\u5236\u3002<\/p>\n<h3 id=\"\u4e00-\u4f20\u7edf\u9694\u79bb\u65b9\u6848\u7684\u6280\u672f\u74f6\u9888\">\u4e00\u3001\u4f20\u7edf\u9694\u79bb\u65b9\u6848\u7684\u6280\u672f\u74f6\u9888<\/h3>\n<p>\u4f20\u7edf\u7cfb\u7edf\u9694\u79bb\u4e3b\u8981\u4f9d\u8d56\u547d\u540d\u7a7a\u95f4\u3001cgroups\u7b49\u673a\u5236\u6784\u5efa\u8d44\u6e90\u8fb9\u754c\u3002\u8fd9\u4e9b\u65b9\u6848\u867d\u7136\u6709\u6548\uff0c\u4f46\u5728\u52a8\u6001\u76d1\u63a7\u548c\u5b9e\u65f6\u54cd\u5e94\u5c42\u9762\u5b58\u5728\u663e\u8457\u77ed\u677f\u3002\u4f8b\u5982\uff0c\u5bb9\u5668\u9003\u9038\u653b\u51fb\u53d1\u751f\u65f6\uff0c\u5e38\u89c4\u65b9\u6848\u5f80\u5f80\u9700\u8981\u7b49\u5f85\u5b89\u5168\u5ba1\u8ba1\u5b8c\u6210\u624d\u80fd\u54cd\u5e94\uff0c\u800c\u6b64\u65f6\u6076\u610f\u8fdb\u7a0b\u53ef\u80fd\u5df2\u7a81\u7834\u9694\u79bb\u8fb9\u754c\u3002\u66f4\u68d8\u624b\u7684\u662f\uff0c<strong>\u591a\u5c42\u865a\u62df\u5316\u5e26\u6765\u7684\u6027\u80fd\u8870\u51cf<\/strong>\u5728\u9ad8\u538b\u573a\u666f\u4e0b\u5c24\u4e3a\u660e\u663e\uff0c\u67d0\u77e5\u540d\u4e91\u670d\u52a1\u5546\u7684\u6d4b\u8bd5\u6570\u636e\u663e\u793a\uff0c\u4f20\u7edf\u5bb9\u5668\u7f51\u7edc\u5728\u5fae\u7a81\u53d1\u6d41\u91cf\u4e0b\u4f1a\u4ea7\u751f\u9ad8\u8fbe30%\u7684\u5ef6\u8fdf\u6ce2\u52a8\u3002<\/p>\n<h3 id=\"\u4e8c-ebpf\u7684\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u4f18\u52bf\">\u4e8c\u3001<a href=\"https:\/\/www.yunshan.net\/\"   target=\"_blank\" style=\"color:blue\">eBPF<\/a>\u7684\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u4f18\u52bf<\/h3>\n<p>eBPF\u901a\u8fc7\u9a8c\u8bc1\u5668\uff08Verifier\uff09\u4fdd\u969c\u7a0b\u5e8f\u5b89\u5168\u6027\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u5728\u5185\u6838\u7a7a\u95f4\u76f4\u63a5\u90e8\u7f72\u5904\u7406\u903b\u8f91\u3002\u8fd9\u610f\u5473\u7740\uff1a<\/p>\n<ol>\n<li><strong>\u96f6\u62f7\u8d1d\u6570\u636e\u8bbf\u95ee<\/strong>\uff1a\u76f4\u63a5\u8bfb\u53d6\u5185\u6838\u6570\u636e\u7ed3\u6784\uff0c\u907f\u514d\u4e86\u7528\u6237\u6001-\u5185\u6838\u6001\u7684\u6570\u636e\u590d\u5236\u5f00\u9500\n<\/li>\n<li><strong>\u4e8b\u4ef6\u9a71\u52a8\u67b6\u6784<\/strong>\uff1a\u901a\u8fc7\u6302\u94a9\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u534f\u8bae\u6808\u7b49\u5173\u952e\u8282\u70b9\uff0c\u5b9e\u73b0\u5b9e\u65f6\u62e6\u622a\n<\/li>\n<li><strong>\u52a8\u6001\u7b56\u7565\u66f4\u65b0<\/strong>\uff1a\u65e0\u9700\u91cd\u542f\u670d\u52a1\u5373\u53ef\u90e8\u7f72\u65b0\u7684\u5b89\u5168\u89c4\u5219\u6216\u6d41\u91cf\u63a7\u5236\u7b56\u7565\n<\/li>\n<\/ol>\n<p>\u5728\u7cfb\u7edf\u9694\u79bb\u573a\u666f\u4e2d\uff0c\u8fd9\u4e9b\u7279\u6027\u8f6c\u5316\u4e3a\u4e09\u5927\u6838\u5fc3\u80fd\u529b\uff1a<strong>\u5b9e\u65f6\u884c\u4e3a\u76d1\u63a7<\/strong>\u3001<strong>\u7cbe\u786e\u8d44\u6e90\u7ea6\u675f<\/strong>\u548c<strong>\u52a8\u6001\u7b56\u7565\u6267\u884c<\/strong>\u3002\u67d0\u5934\u90e8\u91d1\u878d\u79d1\u6280\u516c\u53f8\u7684\u5b9e\u8df5\u8868\u660e\uff0c\u901a\u8fc7eBPF\u5b9e\u73b0\u7684\u7f51\u7edc\u7b56\u7565\u6267\u884c\u5ef6\u8fdf\u4ece\u4f20\u7edf\u7684\u6beb\u79d2\u7ea7\u964d\u81f3\u5fae\u79d2\u7ea7\u3002<\/p>\n<h3 id=\"\u4e09-\u9ad8\u6548\u9694\u79bb\u7684\u5b9e\u8df5\u8def\u5f84\">\u4e09\u3001\u9ad8\u6548\u9694\u79bb\u7684\u5b9e\u8df5\u8def\u5f84<\/h3>\n<h4 id=\"3-1-\u7f51\u7edc\u6d41\u91cf\u9694\u79bb\">3.1 \u7f51\u7edc\u6d41\u91cf\u9694\u79bb<\/h4>\n<p>eBPF\u7684XDP\uff08eXpress Data Path\uff09\u6280\u672f\u53ef\u5728\u7f51\u5361\u9a71\u52a8\u5c42\u5904\u7406\u6570\u636e\u5305\uff0c\u4f7f\u5f97\u7f51\u7edc\u7b56\u7565\u6267\u884c\u70b9\u524d\u79fb\u5230\u6700\u65e9\u5904\u7406\u9636\u6bb5\u3002\u8457\u540d\u5f00\u6e90\u9879\u76eeCilium\u6b63\u662f\u57fa\u4e8e\u6b64\u5b9e\u73b0\u4e86<strong>L7\u7f51\u7edc\u7b56\u7565<\/strong>\uff0c\u76f8\u8f83\u4e8e\u4f20\u7edfiptables\u65b9\u6848\uff0c\u5176\u89c4\u5219\u5339\u914d\u901f\u5ea6\u63d0\u5347\u8d85\u8fc710\u500d\u3002\u8fd9\u79cd\u6df1\u5ea6\u96c6\u6210\u5230\u5185\u6838\u7f51\u7edc\u6808\u7684\u80fd\u529b\uff0c\u4f7f\u5f97\u5373\u4f7f\u9762\u5bf9\u6bcf\u79d2\u767e\u4e07\u7ea7\u7684\u6570\u636e\u5305\u5904\u7406\uff0c\u4ecd\u80fd\u4fdd\u8bc1\u786e\u5b9a\u7684\u5ef6\u8fdf\u8868\u73b0\u3002<\/p>\n<h4 id=\"3-2-\u7cfb\u7edf\u8c03\u7528\u62e6\u622a\">3.2 \u7cfb\u7edf\u8c03\u7528\u62e6\u622a<\/h4>\n<p>\u901a\u8fc7\u6302\u94a9\u5173\u952e\u7cfb\u7edf\u8c03\u7528\uff08\u5982open\u3001execve\uff09\uff0ceBPF\u7a0b\u5e8f\u53ef\u4ee5\u6784\u5efa\u7ec6\u7c92\u5ea6\u7684\u8fdb\u7a0b\u6c99\u7bb1\u3002\u4f8b\u5982\uff0c\u9650\u5236\u67d0\u4e2a\u5bb9\u5668\u53ea\u80fd\u8bbf\u95ee\u7279\u5b9a\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u6216\u963b\u6b62\u975e\u5e38\u89c4\u7684\/proc\u6587\u4ef6\u7cfb\u7edf\u8bbf\u95ee\u3002<strong>Falco\u5b89\u5168\u9879\u76ee<\/strong>\u6b63\u662f\u5229\u7528\u8fd9\u79cd\u673a\u5236\uff0c\u5b9e\u73b0\u4e86\u5bb9\u5668\u8fd0\u884c\u65f6\u884c\u4e3a\u7684\u5b9e\u65f6\u76d1\u63a7\uff0c\u5176\u68c0\u6d4b\u5230\u53ef\u7591\u884c\u4e3a\u7684\u5e73\u5747\u54cd\u5e94\u65f6\u95f4\u7f29\u77ed\u81f3200\u5fae\u79d2\u4ee5\u5185\u3002<\/p>\n<h4 id=\"3-3-\u8d44\u6e90\u8bbf\u95ee\u63a7\u5236\">3.3 \u8d44\u6e90\u8bbf\u95ee\u63a7\u5236<\/h4>\n<p>eBPF\u7684cgroup\u5173\u8054\u529f\u80fd\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u5c06\u7a0b\u5e8f\u9644\u52a0\u5230\u7279\u5b9a\u63a7\u5236\u7ec4\u3002\u8fd9\u610f\u5473\u7740\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u5bb9\u5668\u6216\u8fdb\u7a0b\u5b9a\u4e49\u4e13\u5c5e\u7684\uff1a<\/p>\n<ul>\n<li>\u5185\u5b58\u8bbf\u95ee\u767d\u540d\u5355\n<\/li>\n<li>\u8bbe\u5907\u64cd\u4f5c\u6743\u9650\n<\/li>\n<li>CPU\u8c03\u5ea6\u7b56\u7565\n<\/li>\n<\/ul>\n<p>\u5728\u67d0\u81ea\u52a8\u9a7e\u9a76\u7cfb\u7edf\u7684\u538b\u529b\u6d4b\u8bd5\u4e2d\uff0c\u57fa\u4e8eeBPF\u7684\u8d44\u6e90\u914d\u989d\u7cfb\u7edf\u6210\u529f\u5c06CPU\u4e89\u62a2\u5bfc\u81f4\u7684\u5ef6\u8fdf\u6296\u52a8\u63a7\u5236\u5728\u00b12%\u4ee5\u5185\uff0c\u76f8\u6bd4\u4f20\u7edfcgroups\u65b9\u6848\u63d0\u5347\u8fbe40%\u3002<\/p>\n<h3 id=\"\u56db-\u5178\u578b\u5e94\u7528\u573a\u666f\u89e3\u6790\">\u56db\u3001\u5178\u578b\u5e94\u7528\u573a\u666f\u89e3\u6790<\/h3>\n<h4 id=\"4-1-\u96f6\u4fe1\u4efb\u7f51\u7edc\u67b6\u6784\">4.1 \u96f6\u4fe1\u4efb\u7f51\u7edc\u67b6\u6784<\/h4>\n<p>\u67d0\u8de8\u56fd\u4f01\u4e1a\u91c7\u7528eBPF\u91cd\u5199\u5176\u670d\u52a1\u7f51\u683c\u7684\u6570\u636e\u5e73\u9762\uff0c\u5b9e\u73b0\u4e86<strong>\u57fa\u4e8e\u8eab\u4efd\u7684\u5fae\u670d\u52a1\u901a\u4fe1<\/strong>\u3002\u901a\u8fc7\u5728\u5185\u6838\u5c42\u9762\u5bf9\u6bcf\u4e2a\u6570\u636e\u5305\u8fdb\u884cmTLS\u9a8c\u8bc1\u548c\u670d\u52a1\u8eab\u4efd\u7ed1\u5b9a\uff0c\u5c06\u4f20\u7edf\u65b9\u6848\u4e2d15%\u7684\u6027\u80fd\u635f\u8017\u964d\u4f4e\u52303%\u4ee5\u4e0b\uff0c\u540c\u65f6\u5c06\u7b56\u7565\u8fdd\u89c4\u68c0\u6d4b\u7387\u63d0\u5347\u81f399.9%\u3002<\/p>\n<h4 id=\"4-2-\u5b89\u5168\u5bb9\u5668\u8fd0\u884c\u65f6\">4.2 \u5b89\u5168\u5bb9\u5668\u8fd0\u884c\u65f6<\/h4>\n<p>\u7ed3\u5408eBPF\u7684Linux\u5b89\u5168\u6a21\u5757\uff08LSM\uff09\u6302\u94a9\u70b9\uff0cRuntime Security\u65b9\u6848\u53ef\u4ee5\uff1a<\/p>\n<ul>\n<li>\u52a8\u6001\u751f\u6210\u8fdb\u7a0b\u884c\u4e3a\u57fa\u7ebf\n<\/li>\n<li>\u5b9e\u65f6\u963b\u65ad\u5f02\u5e38\u7cfb\u7edf\u8c03\u7528\u94fe\n<\/li>\n<li>\u8bb0\u5f55\u5b8c\u6574\u53d6\u8bc1\u65f6\u95f4\u7ebf\n<\/li>\n<\/ul>\n<p>\u8fd9\u79cd\u6df1\u5ea6\u9632\u5fa1\u673a\u5236\u4f7f\u5f97\u67d0\u77e5\u540d\u5bb9\u5668\u5e73\u53f0\u7684\u6f0f\u6d1e\u5229\u7528\u5c1d\u8bd5\u62e6\u622a\u7387\u4ece78%\u63d0\u5347\u81f396%\uff0c\u800c\u6027\u80fd\u5f00\u9500\u4ec5\u589e\u52a01.2%\u3002<\/p>\n<h4 id=\"4-3-\u6df7\u5408\u4e91\u6d41\u91cf\u7ba1\u63a7\">4.3 \u6df7\u5408\u4e91\u6d41\u91cf\u7ba1\u63a7<\/h4>\n<p>\u5728\u8de8\u4e91\u7f51\u7edc\u573a\u666f\u4e2d\uff0ceBPF\u7684TC\uff08Traffic Control\uff09\u7a0b\u5e8f\u80fd\u591f\u5b9e\u73b0\u667a\u80fd\u6d41\u91cf\u5f15\u5bfc\u3002\u67d0\u89c6\u9891\u6d41\u5a92\u4f53\u5e73\u53f0\u901a\u8fc7\u90e8\u7f72eBPF\u7a0b\u5e8f\u96c6\uff0c\u572810Gbps\u7f51\u7edc\u73af\u5883\u4e0b\u5b9e\u73b0\u4e86\uff1a<\/p>\n<ul>\n<li>\u8de8AZ\u6d41\u91cf\u81ea\u52a8\u4f18\u5316\n<\/li>\n<li>DDoS\u653b\u51fb\u6d41\u91cf\u8bc6\u522b\u4e0e\u6e05\u6d17\n<\/li>\n<li>\u534f\u8bae\u7ea7QoS\u4fdd\u969c\n<\/li>\n<\/ul>\n<p>\u5176\u7f51\u7edc\u8fd0\u7ef4\u56e2\u961f\u53cd\u9988\uff0c\u6545\u969c\u6392\u67e5\u65f6\u95f4\u4ece\u5e73\u574745\u5206\u949f\u7f29\u77ed\u81f38\u5206\u949f\uff0cSLA\u8fbe\u6807\u7387\u63d0\u5347\u81f399.99%\u3002<\/p>\n<h3 id=\"\u4e94-\u6027\u80fd\u4f18\u5316\u5b9e\u8df5\">\u4e94\u3001\u6027\u80fd\u4f18\u5316\u5b9e\u8df5<\/h3>\n<p>\u867d\u7136eBPF\u672c\u8eab\u5177\u6709\u9ad8\u6027\u80fd\u7279\u6027\uff0c\u4f46\u5728\u5927\u89c4\u6a21\u90e8\u7f72\u65f6\u4ecd\u9700\u6ce8\u610f\uff1a<\/p>\n<ol>\n<li><strong>\u7a0b\u5e8f\u590d\u6742\u5ea6\u63a7\u5236<\/strong>\uff1a\u9a8c\u8bc1\u5668\u5bf9\u6307\u4ee4\u6570\u548c\u5faa\u73af\u7ed3\u6784\u7684\u9650\u5236\n<\/li>\n<li><strong>\u5171\u4eab\u5185\u5b58\u4f18\u5316<\/strong>\uff1a\u5408\u7406\u4f7f\u7528BPF_MAP_TYPE_PERCPU_HASH\u7b49\u6570\u636e\u7ed3\u6784\n<\/li>\n<li><strong>\u4e8b\u4ef6\u805a\u5408\u7b56\u7565<\/strong>\uff1a\u901a\u8fc7\u73af\u5f62\u7f13\u51b2\u533a\uff08ring 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