{"id":31725,"date":"2024-11-26T10:31:41","date_gmt":"2024-11-26T02:31:41","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=22869"},"modified":"2024-11-26T10:31:41","modified_gmt":"2024-11-26T02:31:41","slug":"ebpf%ef%bc%9a%e4%bc%98%e5%8c%96%e5%ba%94%e7%94%a8%e6%80%a7%e8%83%bd%e7%9a%84%e9%ad%94%e6%b3%95%e9%92%a5%e5%8c%99","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/31725.html","title":{"rendered":"eBPF\uff1a\u4f18\u5316\u5e94\u7528\u6027\u80fd\u7684\u9b54\u6cd5\u94a5\u5319"},"content":{"rendered":"

\t\t\t\t\u5728\u5f53\u4eca\u6570\u5b57\u5316\u65f6\u4ee3\uff0c\u5e94\u7528\u6027\u80fd\u7684\u4f18\u5316\u5df2\u6210\u4e3a\u4f01\u4e1a\u63d0\u5347\u7ade\u4e89\u529b\u7684\u91cd\u8981\u624b\u6bb5\u3002\u65e0\u8bba\u662f\u4e91\u8ba1\u7b97\u3001\u5927\u6570\u636e\u5904\u7406\uff0c\u8fd8\u662f\u5fae\u670d\u52a1\u67b6\u6784\uff0c\u9ad8\u6548\u7684\u5e94\u7528\u6027\u80fd\u90fd\u662f\u786e\u4fdd\u7528\u6237\u4f53\u9a8c\u548c\u4e1a\u52a1\u8fde\u7eed\u6027\u7684\u5173\u952e\u3002\u8fd1\u5e74\u6765\uff0ceBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09\u4f5c\u4e3a\u4e00\u79cd\u65b0\u5174\u7684\u6280\u672f\uff0c\u9010\u6e10\u6210\u4e3a\u4f18\u5316\u5e94\u7528\u6027\u80fd\u7684\u9b54\u6cd5\u94a5\u5319\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8eBPF<\/a>\u7684\u539f\u7406\u3001\u5e94\u7528\u573a\u666f\u53ca\u5176\u5728\u6027\u80fd\u4f18\u5316\u4e2d\u7684\u72ec\u7279\u4f18\u52bf\u3002<\/p>\n\n\n\n\n

eBPF\u7684\u57fa\u672c\u6982\u5ff5<\/h3>\n\n\n\n\n

eBPF\u8d77\u6e90\u4e8e\u4f20\u7edf\u7684BPF\uff08Berkeley Packet Filter\uff09\uff0c\u6700\u521d\u7528\u4e8e\u7f51\u7edc\u6570\u636e\u5305\u7684\u8fc7\u6ee4\u3002\u968f\u7740\u6280\u672f\u7684\u53d1\u5c55\uff0ceBPF\u88ab\u6269\u5c55\u4e3a\u4e00\u79cd\u901a\u7528\u7684\u6267\u884c\u5f15\u64ce\uff0c\u80fd\u591f\u5728\u5185\u6838\u4e2d\u8fd0\u884c\u7528\u6237\u5b9a\u4e49\u7684\u7a0b\u5e8f\uff0c\u800c\u65e0\u9700\u4fee\u6539\u5185\u6838\u4ee3\u7801\u3002eBPF\u7a0b\u5e8f\u901a\u8fc7\u4e00\u79cd\u9ad8\u6548\u7684\u865a\u62df\u673a\u5728\u5185\u6838\u4e2d\u6267\u884c\uff0c\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u548c\u76d1\u63a7\u80fd\u529b\u3002<\/p>\n\n\n\n\n\n\n\n\n

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

eBPF\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n\n\n\n\n

eBPF\u7684\u6838\u5fc3\u673a\u5236\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n\n

    \n\n\n
  1. eBPF\u7a0b\u5e8f<\/strong>\uff1a\u7528\u6237\u7f16\u5199\u7684eBPF\u7a0b\u5e8f\u901a\u5e38\u4ee5C\u8bed\u8a00\u7f16\u5199\uff0c\u7136\u540e\u901a\u8fc7eBPF\u7f16\u8bd1\u5668\u8f6c\u6362\u4e3aeBPF\u6307\u4ee4\u96c6\u3002<\/li>\n\n\n\n\n
  2. eBPF\u865a\u62df\u673a<\/strong>\uff1a\u5185\u6838\u4e2d\u7684eBPF\u865a\u62df\u673a\u8d1f\u8d23\u6267\u884c\u8fd9\u4e9beBPF\u7a0b\u5e8f\u3002\u865a\u62df\u673a\u5bf9\u7a0b\u5e8f\u8fdb\u884c\u4e25\u683c\u7684\u9a8c\u8bc1\uff0c\u786e\u4fdd\u5176\u5b89\u5168\u6027\u3002<\/li>\n\n\n\n\n
  3. \u94a9\u5b50\uff08Hooks\uff09<\/strong>\uff1aeBPF\u7a0b\u5e8f\u53ef\u4ee5\u6302\u8f7d\u5230\u5185\u6838\u4e2d\u7684\u5404\u79cd\u94a9\u5b50\u70b9\uff0c\u5982\u7cfb\u7edf\u8c03\u7528\u3001\u7f51\u7edc\u4e8b\u4ef6\u7b49\uff0c\u5b9e\u73b0\u5bf9\u5185\u6838\u884c\u4e3a\u7684\u76d1\u63a7\u548c\u4fee\u6539\u3002<\/li>\n\n\n\n\n
  4. \u6620\u5c04\uff08Maps\uff09<\/strong>\uff1aeBPF\u7a0b\u5e8f\u4f7f\u7528\u6620\u5c04\u6765\u5b58\u50a8\u548c\u4f20\u9012\u6570\u636e\uff0c\u652f\u6301\u591a\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5982\u54c8\u5e0c\u8868\u3001\u6570\u7ec4\u7b49\u3002<\/li>\n\n\n<\/ol>\n\n\n\n\n

    eBPF\u7684\u5e94\u7528\u573a\u666f<\/h3>\n\n\n\n\n

    eBPF\u7684\u5e94\u7528\u573a\u666f\u975e\u5e38\u5e7f\u6cdb\uff0c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n\n

    1. \u7f51\u7edc\u6027\u80fd\u4f18\u5316<\/h4>\n\n\n\n\n

    eBPF\u5728\u7f51\u7edc\u6027\u80fd\u4f18\u5316\u65b9\u9762\u8868\u73b0\u51fa\u8272\u3002\u901a\u8fc7\u5728\u5185\u6838\u4e2d\u76f4\u63a5\u5904\u7406\u7f51\u7edc\u6570\u636e\u5305\uff0ceBPF\u53ef\u4ee5\u663e\u8457\u51cf\u5c11\u4e0a\u4e0b\u6587\u5207\u6362\u548c\u6570\u636e\u62f7\u8d1d\u7684\u5f00\u9500\u3002\u4f8b\u5982\uff0c\u4f7f\u7528eBPF\u53ef\u4ee5\u5b9e\u73b0\u9ad8\u6548\u7684\u6d41\u91cf\u76d1\u63a7\u3001\u8d1f\u8f7d\u5747\u8861\u548c\u9632\u706b\u5899\u529f\u80fd\u3002<\/p>\n\n\n\n\n

    2. \u7cfb\u7edf\u76d1\u63a7\u4e0e\u8bca\u65ad<\/h4>\n\n\n\n\n

    eBPF\u53ef\u4ee5\u5b9e\u65f6\u76d1\u63a7\u5185\u6838\u548c\u5e94\u7528\u7a0b\u5e8f\u7684\u884c\u4e3a\uff0c\u63d0\u4f9b\u7ec6\u7c92\u5ea6\u7684\u6027\u80fd\u6570\u636e\u3002\u5de5\u5177\u5982bpftrace\u548cbcc\uff08BPF Compiler Collection\uff09\u5229\u7528eBPF\u8fdb\u884c\u7cfb\u7edf\u8bca\u65ad\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u5feb\u901f\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888\u3002<\/p>\n\n\n\n\n

    3. \u5b89\u5168\u589e\u5f3a<\/h4>\n\n\n\n\n

    eBPF\u5728\u5b89\u5168\u9886\u57df\u4e5f\u6709\u5e7f\u6cdb\u5e94\u7528\u3002\u901a\u8fc7\u76d1\u63a7\u7cfb\u7edf\u8c03\u7528\u548c\u7f51\u7edc\u6d3b\u52a8\uff0ceBPF\u53ef\u4ee5\u68c0\u6d4b\u548c\u963b\u6b62\u6076\u610f\u884c\u4e3a\u3002\u4f8b\u5982\uff0cCilium\u9879\u76ee\u4f7f\u7528eBPF\u6765\u5b9e\u73b0\u9ad8\u6548\u7684\u7f51\u7edc\u7b56\u7565\u548c\u5b89\u5168\u9694\u79bb\u3002<\/p>\n\n\n\n\n

    4. \u5e94\u7528\u6027\u80fd\u4f18\u5316<\/h4>\n\n\n\n\n

    eBPF\u53ef\u4ee5\u76f4\u63a5\u5e72\u9884\u5e94\u7528\u7a0b\u5e8f\u7684\u8fd0\u884c\uff0c\u4f18\u5316\u5176\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u901a\u8fc7eBPF\u7a0b\u5e8f\u8c03\u6574\u8c03\u5ea6\u7b56\u7565\u3001\u4f18\u5316\u5185\u5b58\u7ba1\u7406\uff0c\u63d0\u5347\u5e94\u7528\u7684\u54cd\u5e94\u901f\u5ea6\u548c\u541e\u5410\u91cf\u3002<\/p>\n\n\n\n\n

    eBPF\u5728\u6027\u80fd\u4f18\u5316\u4e2d\u7684\u4f18\u52bf<\/h3>\n\n\n\n\n

    eBPF\u4e4b\u6240\u4ee5\u6210\u4e3a\u4f18\u5316\u5e94\u7528\u6027\u80fd\u7684\u9b54\u6cd5\u94a5\u5319\uff0c\u4e3b\u8981\u5f97\u76ca\u4e8e\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u7684\u4f18\u52bf\uff1a<\/p>\n\n\n\n\n

    1. \u9ad8\u6548\u7684\u6570\u636e\u5904\u7406<\/h4>\n\n\n\n\n

    eBPF\u7a0b\u5e8f\u5728\u5185\u6838\u4e2d\u76f4\u63a5\u6267\u884c\uff0c\u907f\u514d\u4e86\u7528\u6237\u6001\u548c\u5185\u6838\u6001\u4e4b\u95f4\u7684\u9891\u7e41\u5207\u6362\uff0c\u6781\u5927\u63d0\u5347\u4e86\u6570\u636e\u5904\u7406\u6548\u7387\u3002\u8fd9\u5bf9\u4e8e\u9ad8\u5e76\u53d1\u3001\u4f4e\u5ef6\u8fdf\u7684\u5e94\u7528\u573a\u666f\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n\n\n\n\n

    2. \u7075\u6d3b\u7684\u53ef\u7f16\u7a0b\u6027<\/h4>\n\n\n\n\n

    eBPF\u63d0\u4f9b\u4e86\u4e00\u79cd\u7075\u6d3b\u7684\u53ef\u7f16\u7a0b\u6846\u67b6\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u6839\u636e\u5177\u4f53\u9700\u6c42\u7f16\u5199\u5b9a\u5236\u5316\u7684\u5185\u6838\u7a0b\u5e8f\u3002\u8fd9\u79cd\u7075\u6d3b\u6027\u4f7f\u5f97eBPF\u80fd\u591f\u5e94\u5bf9\u5404\u79cd\u590d\u6742\u7684\u6027\u80fd\u4f18\u5316\u573a\u666f\u3002<\/p>\n\n\n\n\n

    3. \u5b89\u5168\u6027\u4fdd\u969c<\/h4>\n\n\n\n\n

    eBPF\u865a\u62df\u673a\u5bf9\u7a0b\u5e8f\u8fdb\u884c\u4e25\u683c\u7684\u9a8c\u8bc1\uff0c\u786e\u4fdd\u5176\u4e0d\u4f1a\u5bf9\u7cfb\u7edf\u7a33\u5b9a\u6027\u9020\u6210\u5f71\u54cd\u3002\u8fd9\u79cd\u5b89\u5168\u6027\u4fdd\u969c\u4f7f\u5f97eBPF\u80fd\u591f\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u653e\u5fc3\u4f7f\u7528\u3002<\/p>\n\n\n\n\n

    4. \u8de8\u5e73\u53f0\u517c\u5bb9\u6027<\/h4>\n\n\n\n\n

    eBPF\u6280\u672f\u5f97\u5230\u4e86\u4e3b\u6d41Linux\u5185\u6838\u7248\u672c\u7684\u652f\u6301\uff0c\u5177\u6709\u826f\u597d\u7684\u8de8\u5e73\u53f0\u517c\u5bb9\u6027\u3002\u65e0\u8bba\u662f\u7269\u7406\u673a\u3001\u865a\u62df\u673a\u8fd8\u662f\u5bb9\u5668\u73af\u5883\uff0ceBPF\u90fd\u80fd\u53d1\u6325\u5176\u6027\u80fd\u4f18\u5316\u4f5c\u7528\u3002<\/p>\n\n\n\n\n

    \u5b9e\u9645\u6848\u4f8b\u5206\u6790<\/h3>\n\n\n\n\n

    \u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3eBPF\u5728\u6027\u80fd\u4f18\u5316\u4e2d\u7684\u5e94\u7528\uff0c\u6211\u4eec\u6765\u770b\u51e0\u4e2a\u5b9e\u9645\u6848\u4f8b\uff1a<\/p>\n\n\n\n\n

    \u6848\u4f8b\u4e00\uff1aFacebook\u7684\u7f51\u7edc\u6027\u80fd\u4f18\u5316<\/h4>\n\n\n\n\n

    Facebook\u5229\u7528eBPF\u6280\u672f\u4f18\u5316\u5176\u6570\u636e\u4e2d\u5fc3\u7684\u7f51\u7edc\u6027\u80fd\u3002\u901a\u8fc7\u5728\u5185\u6838\u4e2d\u76f4\u63a5\u5904\u7406\u7f51\u7edc\u6570\u636e\u5305\uff0cFacebook\u663e\u8457\u964d\u4f4e\u4e86\u7f51\u7edc\u5ef6\u8fdf\u548cCPU\u5f00\u9500\uff0c\u63d0\u5347\u4e86\u6574\u4f53\u7f51\u7edc\u541e\u5410\u91cf\u3002<\/p>\n\n\n\n\n

    \u6848\u4f8b\u4e8c\uff1aNetflix\u7684\u7cfb\u7edf\u76d1\u63a7<\/h4>\n\n\n\n\n

    Netflix\u4f7f\u7528eBPF\u8fdb\u884c\u7cfb\u7edf\u76d1\u63a7\u548c\u8bca\u65ad\u3002\u901a\u8fc7\u5b9e\u65f6\u6536\u96c6\u5185\u6838\u548c\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u6570\u636e\uff0cNetflix\u80fd\u591f\u5feb\u901f\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888\uff0c\u4f18\u5316\u7cfb\u7edf\u914d\u7f6e\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n\n\n\n\n

    \u6848\u4f8b\u4e09\uff1aCilium\u7684\u5b89\u5168\u589e\u5f3a<\/h4>\n\n\n\n\n

    Cilium\u9879\u76ee\u4f7f\u7528eBPF\u6765\u5b9e\u73b0\u9ad8\u6548\u7684\u7f51\u7edc\u5b89\u5168\u7b56\u7565\u3002\u901a\u8fc7\u76d1\u63a7\u548c\u8fc7\u6ee4\u7f51\u7edc\u6d41\u91cf\uff0cCilium\u63d0\u4f9b\u4e86\u7ec6\u7c92\u5ea6\u7684\u5b89\u5168\u9694\u79bb\uff0c\u4fdd\u62a4\u4e86\u5bb9\u5668\u5316\u5e94\u7528\u7684\u5b89\u5168\u3002<\/p>\n\n\n\n\n

    eBPF\u7684\u672a\u6765\u53d1\u5c55<\/h3>\n\n\n\n\n

    \u968f\u7740eBPF\u6280\u672f\u7684\u4e0d\u65ad\u6210\u719f\u548c\u5e7f\u6cdb\u5e94\u7528\uff0c\u5176\u672a\u6765\u53d1\u5c55\u8d8b\u52bf\u503c\u5f97\u5173\u6ce8\uff1a<\/p>\n\n\n\n\n

    1. \u66f4\u5e7f\u6cdb\u7684\u5e94\u7528\u573a\u666f<\/h4>\n\n\n\n\n

    \u968f\u7740eBPF\u529f\u80fd\u7684\u4e0d\u65ad\u6269\u5c55\uff0c\u5176\u5e94\u7528\u573a\u666f\u5c06\u66f4\u52a0\u5e7f\u6cdb\u3002\u672a\u6765\uff0ceBPF\u6709\u671b\u5728\u5b58\u50a8\u4f18\u5316\u3001\u786c\u4ef6\u52a0\u901f\u7b49\u9886\u57df\u53d1\u6325\u66f4\u5927\u4f5c\u7528\u3002<\/p>\n\n\n\n\n

    2. \u66f4\u5b8c\u5584\u7684\u5de5\u5177\u751f\u6001<\/h4>\n\n\n\n\n

    \u76ee\u524d\uff0ceBPF\u7684\u5de5\u5177\u751f\u6001\u5df2\u521d\u5177\u89c4\u6a21\uff0c\u4f46\u4ecd\u6709\u5f88\u5927\u7684\u63d0\u5347\u7a7a\u95f4\u3002\u672a\u6765\uff0c\u968f\u7740\u66f4\u591a\u5f00\u6e90\u5de5\u5177\u548c\u5546\u4e1a\u4ea7\u54c1\u7684\u63a8\u51fa\uff0ceBPF\u7684\u4f7f\u7528\u5c06\u66f4\u52a0\u4fbf\u6377\u3002<\/p>\n\n\n\n\n

    3. \u66f4\u6df1\u5165\u7684\u6280\u672f\u878d\u5408<\/h4>\n\n\n\n\n

    eBPF\u4e0e\u5176\u4ed6\u6280\u672f\u7684\u878d\u5408\u5c06\u662f\u4e00\u4e2a\u91cd\u8981\u8d8b\u52bf\u3002\u4f8b\u5982\uff0ceBPF\u4e0e\u5bb9\u5668\u6280\u672f\u3001\u4eba\u5de5\u667a\u80fd\u7b49\u7ed3\u5408\uff0c\u5c06\u5e26\u6765\u66f4\u591a\u521b\u65b0\u5e94\u7528\u3002<\/p>\n\n\n\n\n

    \u7ed3\u8bed<\/h3>\n\n\n\n\n

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