{"id":12459,"date":"2024-09-25T12:08:01","date_gmt":"2024-09-25T04:08:01","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=12459"},"modified":"2024-09-25T12:08:01","modified_gmt":"2024-09-25T04:08:01","slug":"%e5%89%96%e6%9e%90ebpf%e5%9c%a8%e8%99%9a%e6%8b%9f%e5%8c%96%e7%8e%af%e5%a2%83%e4%b8%ad%e7%9a%84%e6%80%a7%e8%83%bd%e4%bc%98%e5%8a%bf%e4%b8%8e%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/12459.html","title":{"rendered":"\u5256\u6790eBPF\u5728\u865a\u62df\u5316\u73af\u5883\u4e2d\u7684\u6027\u80fd\u4f18\u52bf\u4e0e\u5e94\u7528"},"content":{"rendered":"

\t\t\t\t\u5256\u6790eBPF\u5728\u865a\u62df\u5316\u73af\u5883\u4e2d\u7684\u6027\u80fd\u4f18\u52bf\u4e0e\u5e94\u7528<\/p>\n\n\n\n\n

\u5728\u5f53\u4eca\u6570\u5b57\u5316\u7684\u65f6\u4ee3\uff0c\u865a\u62df\u5316\u6280\u672f\u5df2\u7ecf\u6210\u4e3a\u4e91\u8ba1\u7b97\u548c\u6570\u636e\u4e2d\u5fc3\u7684\u6838\u5fc3\u7ec4\u6210\u90e8\u5206\u3002\u5728\u865a\u62df\u5316\u73af\u5883\u4e2d\uff0c\u9ad8\u6548\u7684\u7f51\u7edc\u6d41\u91cf\u91c7\u96c6<\/a>\u548c\u5206\u53d1\u5bf9\u4e8e\u5b9e\u73b0\u6027\u80fd\u76d1\u63a7\u3001\u5b89\u5168\u5206\u6790\u548c\u4f18\u5316\u81f3\u5173\u91cd\u8981\u3002\u4e91\u6749\u7f51\u7edc\u4f5c\u4e3a\u7f51\u7edc\u6280\u672f\u9886\u57df\u7684\u521b\u65b0\u8005\uff0c\u4e00\u76f4\u5728\u63a2\u7d22\u548c\u5e94\u7528\u5148\u8fdb\u7684\u6280\u672f\u6765\u6ee1\u8db3\u8fd9\u4e9b\u9700\u6c42\uff0c\u5176\u4e2deBPF\uff08ExtendedBerkeleyPacketFilter\uff09\u6280\u672f\u5c55\u73b0\u51fa\u4e86\u663e\u8457\u7684\u6027\u80fd\u4f18\u52bf\u548c\u5e7f\u6cdb\u7684\u5e94\u7528\u524d\u666f\u3002<\/p>\n\n\n\n

<\/p>\n\n\n\n\n

\u4e00\u3001eBPF\u6280\u672f\u7b80\u4ecb<\/p>\n\n\n\n\n

eBPF\u662f\u4e00\u79cd\u9769\u547d\u6027\u7684\u5185\u6838\u6280\u672f\uff0c\u5b83\u5141\u8bb8\u5728\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u4e2d\u8fd0\u884c\u7528\u6237\u5b9a\u4e49\u7684\u7a0b\u5e8f\u3002\u4f20\u7edf\u7684\u7f51\u7edc\u76d1\u63a7\u548c\u6570\u636e\u5305\u5904\u7406\u901a\u5e38\u4f9d\u8d56\u4e8e\u5185\u6838\u6a21\u5757\u6216\u7528\u6237\u7a7a\u95f4\u7684\u4ee3\u7406\u7a0b\u5e8f\uff0c\u4f46\u8fd9\u4e9b\u65b9\u6cd5\u5b58\u5728\u6027\u80fd\u5f00\u9500\u5927\u3001\u7075\u6d3b\u6027\u5dee\u7b49\u95ee\u9898\u3002eBPF\u5219\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u9ad8\u6548\u3001\u66f4\u7075\u6d3b\u7684\u65b9\u5f0f\u6765\u5904\u7406\u7f51\u7edc\u6570\u636e\u5305\u548c\u83b7\u53d6\u7cfb\u7edf\u4fe1\u606f\u3002<\/p>\n\n\n\n\n

eBPF\u7a0b\u5e8f\u53ef\u4ee5\u5728\u5185\u6838\u4e2d\u52a8\u6001\u52a0\u8f7d\u548c\u6267\u884c\uff0c\u80fd\u591f\u5728\u6570\u636e\u5305\u5230\u8fbe\u7f51\u7edc\u6808\u7684\u7279\u5b9a\u70b9\u65f6\u8fdb\u884c\u62e6\u622a\u548c\u5904\u7406\uff0c\u800c\u65e0\u9700\u8fdb\u884c\u5927\u91cf\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u548c\u6570\u636e\u590d\u5236\u3002\u8fd9\u4f7f\u5f97\u5b83\u80fd\u591f\u4ee5\u6781\u4f4e\u7684\u6027\u80fd\u5f00\u9500\u5b9e\u73b0\u5bf9\u7f51\u7edc\u6d41\u91cf\u7684\u5b9e\u65f6\u76d1\u6d4b\u548c\u5206\u6790\u3002<\/p>\n\n\n\n\n

\u4e8c\u3001eBPF\u5728\u865a\u62df\u5316\u73af\u5883\u4e2d\u7684\u6027\u80fd\u4f18\u52bf<\/p>\n\n\n\n\n

1.\u4f4e\u5f00\u9500\u7684\u6570\u636e\u5305\u5904\u7406<\/p>\n\n\n\n\n

\u5728\u865a\u62df\u5316\u73af\u5883\u4e2d\uff0c\u7f51\u7edc\u6d41\u91cf\u901a\u5e38\u975e\u5e38\u5e9e\u5927\u3002eBPF\u80fd\u591f\u5728\u6570\u636e\u5305\u8fdb\u5165\u5185\u6838\u7f51\u7edc\u6808\u65f6\u7acb\u5373\u8fdb\u884c\u5904\u7406\uff0c\u907f\u514d\u4e86\u5c06\u6570\u636e\u5305\u590d\u5236\u5230\u7528\u6237\u7a7a\u95f4\u6240\u5e26\u6765\u7684\u5f00\u9500\u3002\u8fd9\u4e0d\u4ec5\u63d0\u9ad8\u4e86\u5904\u7406\u901f\u5ea6\uff0c\u8fd8\u51cf\u5c11\u4e86CPU\u8d44\u6e90\u7684\u6d88\u8017\uff0c\u4ece\u800c\u4e3a\u865a\u62df\u5316\u73af\u5883\u4e2d\u7684\u5176\u4ed6\u4efb\u52a1\u7559\u51fa\u66f4\u591a\u7684\u8ba1\u7b97\u8d44\u6e90\u3002<\/p>\n\n\n\n\n

2.\u9ad8\u6548\u7684\u8fc7\u6ee4\u548c\u9009\u62e9<\/p>\n\n\n\n\n

eBPF\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u8fc7\u6ee4\u673a\u5236\uff0c\u53ef\u4ee5\u6839\u636e\u5404\u79cd\u6761\u4ef6\uff08\u5982\u6e90IP\u3001\u76ee\u7684IP\u3001\u7aef\u53e3\u53f7\u3001\u534f\u8bae\u7b49\uff09\u5bf9\u7f51\u7edc\u6d41\u91cf\u8fdb\u884c\u7cbe\u786e\u7b5b\u9009\u3002\u8fd9\u610f\u5473\u7740\u53ea\u9700\u8981\u5904\u7406\u611f\u5174\u8da3\u7684\u6d41\u91cf\uff0c\u800c\u4e0d\u662f\u5904\u7406\u6240\u6709\u7684\u6570\u636e\u5305\uff0c\u8fdb\u4e00\u6b65\u964d\u4f4e\u4e86\u7cfb\u7edf\u7684\u8d1f\u8f7d\u3002<\/p>\n\n\n\n\n

3.\u5b9e\u65f6\u6027\u80fd\u76d1\u6d4b<\/p>\n\n\n\n\n

\u865a\u62df\u5316\u73af\u5883\u4e2d\u7684\u6027\u80fd\u76d1\u6d4b\u9700\u8981\u5b9e\u65f6\u83b7\u53d6\u51c6\u786e\u7684\u6570\u636e\u3002eBPF\u53ef\u4ee5\u5b9e\u65f6\u6536\u96c6\u548c\u7edf\u8ba1\u7f51\u7edc\u76f8\u5173\u7684\u6027\u80fd\u6307\u6807\uff0c\u5982\u541e\u5410\u91cf\u3001\u5ef6\u8fdf\u3001\u4e22\u5305\u7387\u7b49\uff0c\u4e3a\u7ba1\u7406\u5458\u63d0\u4f9b\u53ca\u65f6\u7684\u6027\u80fd\u6d1e\u5bdf\uff0c\u4ee5\u4fbf\u5feb\u901f\u53d1\u73b0\u548c\u89e3\u51b3\u6f5c\u5728\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n\n

4.\u5185\u6838\u7ea7\u7684\u4f18\u5316<\/p>\n\n\n\n\n

\u7531\u4e8eeBPF\u7a0b\u5e8f\u8fd0\u884c\u5728\u5185\u6838\u4e2d\uff0c\u5b83\u4eec\u80fd\u591f\u5145\u5206\u5229\u7528\u5185\u6838\u7684\u4f18\u5316\u673a\u5236\u548c\u786c\u4ef6\u7279\u6027\uff0c\u5982\u591a\u6838\u5e76\u884c\u5904\u7406\u3001\u786c\u4ef6\u52a0\u901f\u7b49\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u9ad8\u7684\u6027\u80fd\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n\n\n\n\n

\u4e09\u3001eBPF\u5728\u865a\u62df\u5316\u73af\u5883\u4e2d\u7684\u5e94\u7528\u573a\u666f<\/p>\n\n\n\n\n

1.\u7f51\u7edc\u5b89\u5168\u76d1\u63a7<\/p>\n\n\n\n\n

\u5728\u865a\u62df\u5316\u73af\u5883\u4e2d\uff0c\u5b89\u5168\u5a01\u80c1\u65e5\u76ca\u590d\u6742\u3002eBPF\u53ef\u4ee5\u7528\u4e8e\u5b9e\u65f6\u68c0\u6d4b\u7f51\u7edc\u4e2d\u7684\u5f02\u5e38\u6d41\u91cf\u3001\u5165\u4fb5\u884c\u4e3a\u548c\u6076\u610f\u8f6f\u4ef6\u901a\u4fe1\u3002\u901a\u8fc7\u7f16\u5199\u7279\u5b9a\u7684eBPF\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u5bf9\u7f51\u7edc\u8fde\u63a5\u8fdb\u884c\u6df1\u5ea6\u5206\u6790\uff0c\u53ca\u65f6\u53d1\u73b0\u5e76\u963b\u6b62\u6f5c\u5728\u7684\u5b89\u5168\u5a01\u80c1\u3002<\/p>\n\n\n\n\n

2.\u5e94\u7528\u6027\u80fd\u7ba1\u7406<\/a><\/p>\n\n\n\n\n

\u5bf9\u4e8e\u8fd0\u884c\u5728\u865a\u62df\u5316\u73af\u5883\u4e2d\u7684\u5e94\u7528\uff0c\u4e86\u89e3\u5176\u7f51\u7edc\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002eBPF\u53ef\u4ee5\u5e2e\u52a9\u6536\u96c6\u5e94\u7528\u7684\u7f51\u7edc\u6d41\u91cf\u7279\u5f81\uff0c\u5982\u54cd\u5e94\u65f6\u95f4\u3001\u6d41\u91cf\u5206\u5e03\u7b49\uff0c\u4ece\u800c\u4e3a\u4f18\u5316\u5e94\u7528\u6027\u80fd\u63d0\u4f9b\u4f9d\u636e\u3002\u901a\u8fc7\u8bc6\u522b\u6027\u80fd\u74f6\u9888\uff0c\u7ba1\u7406\u5458\u53ef\u4ee5\u9488\u5bf9\u6027\u5730\u8fdb\u884c\u8c03\u6574\u548c\u4f18\u5316\u3002<\/p>\n\n\n\n\n

3.\u6d41\u91cf\u8c03\u5ea6\u548c\u8d1f\u8f7d\u5747\u8861<\/p>\n\n\n\n\n

\u6839\u636e\u7f51\u7edc\u6d41\u91cf\u7684\u5b9e\u65f6\u60c5\u51b5\uff0ceBPF\u53ef\u4ee5\u52a8\u6001\u5730\u8c03\u6574\u6d41\u91cf\u7684\u8def\u7531\u548c\u5206\u53d1\uff0c\u5b9e\u73b0\u66f4\u667a\u80fd\u7684\u8d1f\u8f7d\u5747\u8861\u3002\u8fd9\u6709\u52a9\u4e8e\u63d0\u9ad8\u865a\u62df\u5316\u73af\u5883\u4e2d\u8d44\u6e90\u7684\u5229\u7528\u7387\uff0c\u786e\u4fdd\u5404\u4e2a\u865a\u62df\u673a\u6216\u5bb9\u5668\u83b7\u5f97\u5747\u8861\u7684\u7f51\u7edc\u670d\u52a1\u3002<\/p>\n\n\n\n\n

4.\u6545\u969c\u6392\u67e5\u548c\u8bca\u65ad<\/p>\n\n\n\n\n

\u5f53\u7f51\u7edc\u51fa\u73b0\u6545\u969c\u65f6\uff0ceBPF\u80fd\u591f\u5feb\u901f\u6536\u96c6\u76f8\u5173\u7684\u6570\u636e\u5305\u548c\u7cfb\u7edf\u4fe1\u606f\uff0c\u5e2e\u52a9\u7ba1\u7406\u5458\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\u7684\u6839\u6e90\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u5206\u6790\u6570\u636e\u5305\u7684\u5e8f\u5217\u548c\u5185\u5bb9\uff0c\u53ef\u4ee5\u53d1\u73b0\u7f51\u7edc\u62e5\u585e\u3001\u9519\u8bef\u914d\u7f6e\u6216\u786c\u4ef6\u6545\u969c\u7b49\u95ee\u9898\u3002<\/p>\n\n\n\n\n

\u56db\u3001\u4e91\u6749\u7f51\u7edc\u4e0eeBPF\u7684\u7ed3\u5408<\/p>\n\n\n\n\n

\u4e91\u6749\u7f51\u7edc\u4f5c\u4e3a\u7f51\u7edc\u6280\u672f\u7684\u9886\u5148\u8005\uff0c\u79ef\u6781\u5c06eBPF\u6280\u672f\u878d\u5165\u5176\u89e3\u51b3\u65b9\u6848\u4e2d\uff0c\u4e3a\u5ba2\u6237\u63d0\u4f9b\u66f4\u9ad8\u6548\u3001\u66f4\u667a\u80fd\u7684\u7f51\u7edc\u6d41\u91cf\u91c7\u96c6<\/a>\u548c\u5206\u53d1\u670d\u52a1\u3002<\/p>\n\n\n\n\n

\u901a\u8fc7\u5229\u7528eBPF\u7684\u6027\u80fd\u4f18\u52bf\uff0c\u4e91\u6749\u7f51\u7edc\u80fd\u591f\u5728\u5927\u89c4\u6a21\u865a\u62df\u5316\u73af\u5883\u4e2d\u5b9e\u73b0\u9ad8\u7cbe\u5ea6\u7684\u6d41\u91cf\u76d1\u6d4b\u548c\u5206\u6790\uff0c\u4e3a\u4f01\u4e1a\u63d0\u4f9b\u5168\u9762\u7684\u7f51\u7edc\u53ef\u89c6\u5316<\/a>\u548c\u6d1e\u5bdf\u80fd\u529b\u3002\u5176\u89e3\u51b3\u65b9\u6848\u4e0d\u4ec5\u80fd\u591f\u6ee1\u8db3\u5b9e\u65f6\u6027\u80fd\u76d1\u6d4b\u7684\u9700\u6c42\uff0c\u8fd8\u80fd\u591f\u5feb\u901f\u9002\u5e94\u4e0d\u65ad\u53d8\u5316\u7684\u7f51\u7edc\u67b6\u6784\u548c\u4e1a\u52a1\u9700\u6c42\u3002<\/p>\n\n\n\n\n

\u6b64\u5916\uff0c\u4e91\u6749\u7f51\u7edc\u8fd8\u901a\u8fc7\u521b\u65b0\u7684\u7b97\u6cd5\u548c\u7b56\u7565\uff0c\u8fdb\u4e00\u6b65\u4f18\u5316\u4e86eBPF\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u51c6\u786e\u6027\uff0c\u786e\u4fdd\u5728\u590d\u6742\u7684\u865a\u62df\u5316\u73af\u5883\u4e2d\u80fd\u591f\u7a33\u5b9a\u53ef\u9760\u5730\u8fd0\u884c\u3002<\/p>\n\n\n\n\n

\u4e94\u3001\u6311\u6218\u4e0e\u5c55\u671b<\/p>\n\n\n\n\n

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