{"id":32417,"date":"2025-03-04T10:07:25","date_gmt":"2025-03-04T02:07:25","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=32417"},"modified":"2025-03-04T10:07:25","modified_gmt":"2025-03-04T02:07:25","slug":"ebpf%e5%9c%a8%e7%bd%91%e7%bb%9c%e5%ae%89%e5%85%a8%e7%9b%91%e6%8e%a7%e4%b8%ad%e7%9a%84%e5%85%b7%e4%bd%93%e5%ba%94%e7%94%a8%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/32417.html","title":{"rendered":"eBPF\u5728\u7f51\u7edc\u5b89\u5168\u76d1\u63a7\u4e2d\u7684\u5177\u4f53\u5e94\u7528\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

\n

\"eBPF\u5728\u7f51\u7edc\u5b89\u5168\u76d1\u63a7\u4e2d\u7684\u5177\u4f53\u5e94\u7528\u6709\u54ea\u4e9b\uff1f\"<\/p>\n<\/p>\n

\n

\u5f53\u7f51\u7edc\u653b\u51fb\u624b\u6bb5\u4ee5\u6bcf\u5e7437%\u7684\u589e\u901f\u8fed\u4ee3\u65f6<\/strong>\uff0c\u4f20\u7edf\u7684\u5b89\u5168\u76d1\u63a7\u5de5\u5177\u5df2\u96be\u4ee5\u5e94\u5bf9\u52a8\u6001\u53d8\u5316\u7684\u5a01\u80c1\u73af\u5883\u3002\u9632\u706b\u5899\u89c4\u5219\u66f4\u65b0\u6ede\u540e\u3001\u5165\u4fb5\u68c0\u6d4b\u7cfb\u7edf\uff08IDS\uff09\u8d44\u6e90\u6d88\u8017\u8fc7\u9ad8\u3001\u4e91\u539f\u751f\u67b6\u6784\u4e2d\u53ef\u89c1\u6027\u7f3a\u5931\u2026\u2026\u8fd9\u4e9b\u95ee\u9898\u90fd\u5728\u5012\u903c\u6280\u672f\u9769\u65b0\u3002eBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong> \u6b63\u662f\u5728\u8fd9\u6837\u7684\u80cc\u666f\u4e0b\uff0c\u51ed\u501f\u5176\u5185\u6838\u7ea7\u53ef\u7f16\u7a0b\u6027<\/strong>\u548c\u96f6\u6027\u80fd\u635f\u8017<\/strong>\u7684\u7279\u6027\uff0c\u6210\u4e3a\u6784\u5efa\u4e0b\u4e00\u4ee3\u5b89\u5168\u76d1\u63a7\u4f53\u7cfb\u7684\u57fa\u77f3\u3002<\/p>\n

\n

\u4e00\u3001eBPF<\/a>\u5982\u4f55\u91cd\u6784\u7f51\u7edc\u5b89\u5168\u76d1\u63a7\u7684\u5e95\u5c42\u903b\u8f91<\/h3>\n

\u4f20\u7edf\u7f51\u7edc\u5b89\u5168\u76d1\u63a7\u4f9d\u8d56\u7528\u6237\u6001\u4ee3\u7406\u6216\u786c\u4ef6\u63a2\u9488\uff0c\u5b58\u5728\u4e24\u5927\u75db\u70b9\uff1a\u89c2\u6d4b\u76f2\u533a<\/strong>\u4e0e\u6027\u80fd\u635f\u8017<\/strong>\u3002\u4f8b\u5982\uff0c\u5bb9\u5668\u73af\u5883\u4e0bSidecar\u6a21\u5f0f\u7684\u6d41\u91cf\u52ab\u6301\u4f1a\u589e\u52a030%\u7684\u5ef6\u8fdf\uff0c\u800c\u786c\u4ef6\u63a2\u9488\u96be\u4ee5\u6355\u6349\u52a0\u5bc6\u6d41\u91cf\u4e2d\u7684\u6076\u610f\u8f7d\u8377\u3002<\/p>\n

eBPF\u901a\u8fc7\u5728\u5185\u6838\u7a7a\u95f4\u76f4\u63a5\u63d2\u5165\u6c99\u76d2\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4e86\u56db\u7ef4\u7a81\u7834<\/strong>\uff1a<\/p>\n

    \n
  1. \u5168\u6d41\u91cf\u900f\u89c6<\/strong>\uff1a\u5728\u534f\u8bae\u6808\u5e95\u5c42\u6355\u83b7\u52a0\u5bc6\u524d\u540e\u7684\u539f\u59cb\u6570\u636e\u5305\n<\/li>\n
  2. \u4e0a\u4e0b\u6587\u5173\u8054<\/strong>\uff1a\u5c06\u7f51\u7edc\u4e8b\u4ef6\u4e0e\u8fdb\u7a0b\u3001\u5bb9\u5668\u3001Kubernetes Pod\u5143\u6570\u636e\u52a8\u6001\u7ed1\u5b9a\n<\/li>\n
  3. \u5b9e\u65f6\u963b\u65ad<\/strong>\uff1a\u5728\u6570\u636e\u5305\u5230\u8fbe\u5e94\u7528\u524d\u6267\u884c\u4e22\u5f03\u52a8\u4f5c\uff0c\u54cd\u5e94\u901f\u5ea6\u8fbe\u5230\u5fae\u79d2\u7ea7\n<\/li>\n
  4. \u96f6\u4fb5\u5165\u90e8\u7f72<\/strong>\uff1a\u65e0\u9700\u4fee\u6539\u5e94\u7528\u4ee3\u7801\u6216\u91cd\u542f\u670d\u52a1\n<\/li>\n<\/ol>\n

    2023\u5e74CNCF\u7684\u8c03\u67e5\u62a5\u544a\u663e\u793a\uff0c68%\u7684\u4e91\u539f\u751f\u7528\u6237\u5df2\u91c7\u7528\u57fa\u4e8eeBPF\u7684\u5b89\u5168\u65b9\u6848<\/strong>\uff0c\u8fd9\u4e00\u6570\u636e\u8f83\u4e24\u5e74\u524d\u589e\u957f\u4e864\u500d\u3002<\/p>\n

    \n

    \u4e8c\u3001\u516d\u5927\u6838\u5fc3\u5e94\u7528\u573a\u666f\u89e3\u6790<\/h3>\n

    1. \u5b9e\u65f6\u52a0\u5bc6\u6d41\u91cf\u5206\u6790<\/strong><\/h4>\n

    TLS 1.3\u5168\u9762\u666e\u53ca\u4f7f\u5f97\u4f20\u7edfDPI\u6280\u672f\u5931\u6548\uff0c\u800ceBPF\u53ef\u901a\u8fc7SSL\/TLS\u5e93\u51fd\u6570\u6302\u94a9\uff08hook\uff09<\/strong>\uff0c\u5728\u52a0\u89e3\u5bc6\u524d\u63d0\u53d6\u660e\u6587\u3002\u5f00\u6e90\u9879\u76eeKindling<\/strong>\u5229\u7528\u8be5\u6280\u672f\uff0c\u6210\u529f\u8bc6\u522b\u51fa\u67d0\u91d1\u878d\u7cfb\u7edf\u5185\u5b58\u9a6c\u901a\u8fc7\u52a0\u5bc6\u4fe1\u9053\u5916\u6cc4\u6570\u636e\u7684\u5f02\u5e38\u884c\u4e3a\uff0c\u8bef\u62a5\u7387\u4f4e\u4e8e0.1%\u3002<\/p>\n

    2. \u5185\u6838\u7ea7\u5165\u4fb5\u68c0\u6d4b<\/strong><\/h4>\n

    \u901a\u8fc7\u76d1\u63a7\u7cfb\u7edf\u8c03\u7528\u5e8f\u5217<\/strong>\uff0ceBPF\u80fd\u53d1\u73b0\u4f20\u7edfIDS\u9057\u6f0f\u7684\u653b\u51fb\u6a21\u5f0f\u3002\u4f8b\u5982\u68c0\u6d4b\u5230execve("\/tmp\/.x")<\/code>\u540e\u7acb\u5373\u89e6\u53d1unlink<\/code>\u64cd\u4f5c\uff0c\u8fd9\u7c7b\u7279\u5f81\u53ef\u7cbe\u51c6\u8bc6\u522b\u65e0\u6587\u4ef6\u653b\u51fb\u3002Falco<\/strong>\u9879\u76ee\u6b63\u662f\u57fa\u4e8e\u6b64\u539f\u7406\uff0c\u5728\u5bb9\u5668\u9003\u9038\u68c0\u6d4b\u4e2d\u5b9e\u73b098.7%\u7684\u51c6\u786e\u7387\u3002<\/p>\n

    3. \u96f6\u65e5\u6f0f\u6d1e\u52a8\u6001\u9632\u5fa1<\/strong><\/h4>\n

    \u9488\u5bf9Log4j2\u6f0f\u6d1e\u884d\u751f\u51fa\u768415\u79cd\u653b\u51fb\u53d8\u4f53\uff0c\u57fa\u4e8eeBPF\u7684\u9632\u62a4\u65b9\u6848\u53ef\u901a\u8fc7JNDI\u67e5\u8be2\u6a21\u5f0f\u5339\u914d<\/strong>\uff0c\u5728\u6f0f\u6d1e\u89e6\u53d1\u524d\u963b\u65ad\u6076\u610f\u8bf7\u6c42\u3002\u76f8\u6bd4WAF\u89c4\u5219\u66f4\u65b0\u9700\u8981\u6570\u5c0f\u65f6\uff0c\u8fd9\u79cd\u65b9\u6848\u7684\u5e73\u5747\u54cd\u5e94\u65f6\u95f4\u7f29\u77ed\u81f38\u5206\u949f<\/strong>\u3002<\/p>\n

    4. \u5bb9\u5668\u5fae\u9694\u79bb\u7b56\u7565\u5b9e\u65bd<\/strong><\/h4>\n

    \u5728Kubernetes\u96c6\u7fa4\u4e2d\uff0ceBPF\u53ef\u6784\u5efa\u56db\u7ef4\u8eab\u4efd\u6a21\u578b<\/strong>\uff08\u547d\u540d\u7a7a\u95f4\/Pod\/\u670d\u52a1\/\u8fdb\u7a0b\uff09\uff0c\u5b9e\u73b0\u7ec6\u7c92\u5ea6\u7f51\u7edc\u7b56\u7565\u3002Cilium\u901a\u8fc7\u8be5\u6280\u672f\u5c06\u7b56\u7565\u4e0b\u53d1\u8017\u65f6\u4ece\u79d2\u7ea7\u964d\u81f3\u6beb\u79d2\u7ea7\uff0c\u5e76\u652f\u630110\u4e07\u6761\u4ee5\u4e0a\u7b56\u7565\u7684\u5b9e\u65f6\u751f\u6548\u3002<\/p>\n

    5. \u96f6\u4fe1\u4efb\u67b6\u6784\u7684\u8fd0\u884c\u65f6\u4fdd\u969c<\/strong><\/h4>\n

    eBPF\u6301\u7eed\u9a8c\u8bc1\u7684\u8eab\u4efd-\u884c\u4e3a\u57fa\u7ebf\u6a21\u578b<\/strong>\uff0c\u53ef\u68c0\u6d4b\u670d\u52a1\u8d26\u6237\u7684\u5f02\u5e38\u64cd\u4f5c\u3002\u5f53\u67d0\u4e2aPod\u7a81\u7136\u53d1\u8d77\u8de8\u96c6\u7fa4SSH\u8fde\u63a5\u65f6\uff0c\u7cfb\u7edf\u80fd\u5728200\u03bcs\u5185<\/strong>\u7ec8\u6b62\u4f1a\u8bdd\u5e76\u544a\u8b66\uff0c\u76f8\u6bd4\u4f20\u7edf\u65b9\u6848\u63d0\u901f3\u4e2a\u6570\u91cf\u7ea7\u3002<\/p>\n

    6. \u9ad8\u7ea7\u5a01\u80c1\u72e9\u730e<\/strong><\/h4>\n

    \u7ed3\u5408\u5386\u53f2\u6d41\u91cf\u955c\u50cf\u4e0eeBPF\u7684\u5b9e\u65f6\u5206\u6790\u80fd\u529b\uff0c\u5b89\u5168\u56e2\u961f\u53ef\u6784\u5efa\u653b\u51fb\u884c\u4e3a\u56fe\u8c31<\/strong>\u3002\u67d0\u80fd\u6e90\u4f01\u4e1a\u901a\u8fc7\u8be5\u6280\u672f\uff0c\u57283PB\u7ea7\u6d41\u91cf\u4e2d\u5b9a\u4f4d\u5230APT\u7ec4\u7ec7\u4f7f\u7528ICMP\u96a7\u9053\u6e17\u900f\u7684\u75d5\u8ff9\uff0c\u6eaf\u6e90\u51c6\u786e\u7387\u63d0\u534740\u500d\u3002<\/p>\n

    \n

    \u4e09\u3001\u5173\u952e\u6280\u672f\u5b9e\u73b0\u5256\u6790<\/h3>\n

    \u52a8\u6001\u63a2\u9488\u6ce8\u5165\u6280\u672f<\/strong><\/h4>\n

    \u901a\u8fc7bpf_probe_read<\/code>\u51fd\u6570\u8bfb\u53d6\u7528\u6237\u6001\u5185\u5b58\uff0c\u914d\u5408kprobes<\/code>\/uprobes<\/code>\u5b9e\u73b0\u65e0\u95f4\u65ad\u76d1\u63a7\u3002\u4f8b\u5982\u68c0\u6d4bJava RCE\u6f0f\u6d1e\u65f6\uff0c\u53ef\u76f4\u63a5\u6302\u94a9JVM\u7684defineClass<\/code>\u65b9\u6cd5\uff0c\u65e0\u9700\u91cd\u542fJava\u8fdb\u7a0b\u3002<\/p>\n

    \u5b89\u5168\u7b56\u7565\u7f16\u8bd1\u4f18\u5316<\/h4>\n

    \u5c06L7\u89c4\u5219\u7f16\u8bd1\u4e3aeBPF\u5b57\u8282\u7801\uff0c\u907f\u514d\u89e3\u91ca\u6267\u884c\u5f00\u9500\u3002Cilium\u7684XDP\u52a0\u901f\u65b9\u6848\u4f7fHTTP\u5934\u68c0\u6d4b\u5ef6\u8fdf\u4ece\u6beb\u79d2\u7ea7\u964d\u81f3\u7eb3\u79d2\u7ea7\uff0c\u5355\u8282\u70b9\u652f\u6301\u767e\u4e07\u7ea7QPS\u5904\u7406\u3002<\/p>\n

    \u4e8b\u4ef6\u5173\u8054\u5f15\u64ce\u8bbe\u8ba1<\/h4>\n

    \u91c7\u7528eBPF Map<\/strong>\u7ed3\u6784\u5b58\u50a8\u8fdb\u7a0b\u6811\u3001\u7f51\u7edc\u8fde\u63a5\u7b49\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002\u5f53\u68c0\u6d4b\u5230\u5f02\u5e38DNS\u67e5\u8be2\u65f6\uff0c\u53ef\u7acb\u5373\u5173\u8054\u53d1\u8d77\u8fdb\u7a0b\u7684\u955c\u50cf\u54c8\u5e0c\u503c\uff0c\u5b9e\u73b0\u8de8\u5c42\u53d6\u8bc1\u3002<\/p>\n

    \n

    \u56db\u3001\u843d\u5730\u5b9e\u8df5\u4e2d\u7684\u5173\u952e\u6311\u6218<\/h3>\n

    \u5c3d\u7ba1eBPF\u4f18\u52bf\u663e\u8457\uff0c\u4f46\u4f01\u4e1a\u90e8\u7f72\u65f6\u9700\u6ce8\u610f\uff1a<\/p>\n

      \n
    • \u5185\u6838\u7248\u672c\u788e\u7247\u5316<\/strong>\uff1a\u9700\u8981\u517c\u5bb94.14-6.5\u7b49\u591a\u4e2a\u5185\u6838\u5206\u652f\n<\/li>\n
    • \u5b89\u5168\u7b56\u7565\u9a8c\u8bc1<\/strong>\uff1a\u9519\u8bef\u7684\u5185\u6838\u5185\u5b58\u8bbf\u95ee\u53ef\u80fd\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\n<\/li>\n
    • \u56e2\u961f\u80fd\u529b\u9e3f\u6c9f<\/strong>\uff1a\u65e2\u61c2\u5185\u6838\u7f16\u7a0b\u53c8\u7cbe\u901a\u5b89\u5168\u653b\u9632\u7684\u590d\u5408\u578b\u4eba\u624d\u7a00\u7f3a\n<\/li>\n<\/ul>\n

      \u5934\u90e8\u4e91\u5382\u5546\u7684\u89e3\u51b3\u8def\u5f84\u5305\u62ec\uff1a\u6784\u5efa\u7248\u672c\u9002\u914d\u5c42<\/strong>\u3001\u5f00\u53d1\u53ef\u89c6\u5316\u7b56\u7565\u751f\u6210\u5668\u3001\u63d0\u4f9b\u9884\u7f16\u8bd1\u5b89\u5168\u6a21\u5757\u5e93\u3002\u4f8b\u5982AWS\u63a8\u51fa\u7684\u57fa\u4e8eeBPF\u7684\u7f51\u7edc\u5b89\u5168\u670d\u52a1\uff0c\u5df2\u5b9e\u73b095%\u7684\u7b56\u7565\u914d\u7f6e\u81ea\u52a8\u5316\u3002<\/p>\n

      \n

      \u4e94\u3001\u672a\u6765\u6f14\u8fdb\u65b9\u5411<\/h3>\n

      2024\u5e74Linux 6.6\u5185\u6838\u5c06\u5f15\u5165\u7c7b\u578b\u5b89\u5168\u9a8c\u8bc1\u5668<\/strong>\uff0c\u53ef\u81ea\u52a8\u68c0\u6d4b\u5185\u5b58\u8d8a\u754c\u7b49\u98ce\u9669\u3002\u540c\u65f6\uff0ceBPF\u4e0e\u786c\u4ef6\u52a0\u901f\u5668\uff08\u5982SmartNIC\uff09\u7684\u878d\u5408\uff0c\u6b63\u5728\u7a81\u7834\u5355\u8282\u70b9200Gbps\u6d41\u91cf\u5904\u7406\u7684\u6781\u9650\u3002\u5728AI\u9a71\u52a8\u5b89\u5168\u9886\u57df\uff0c\u57fa\u4e8eeBPF\u7684\u5b9e\u65f6\u7279\u5f81\u63d0\u53d6\u6846\u67b6\uff0c\u53ef\u4f7f\u5a01\u80c1\u68c0\u6d4b\u6a21\u578b\u7684\u8bad\u7ec3\u6570\u636e\u65f6\u6548\u6027\u63d0\u534780%\u3002<\/p>\n

      \u6b63\u5982Linux\u57fa\u91d1\u4f1a\u5b89\u5168\u5cf0\u4f1a\u4e0a\u7684\u8bba\u65ad\uff1a\u201ceBPF\u6b63\u5728\u91cd\u65b0\u5b9a\u4e49\u5b89\u5168\u53ef\u89c2\u6d4b\u6027\u7684\u8fb9\u754c\uff0c\u5176\u4ef7\u503c\u4e0d\u4e9a\u4e8e\u5f53\u5e74\u865a\u62df\u5316\u6280\u672f\u5bf9\u4e91\u8ba1\u7b97\u7684\u91cd\u6784\u201d<\/strong>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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