{"id":31962,"date":"2025-01-15T12:36:36","date_gmt":"2025-01-15T04:36:36","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=24160"},"modified":"2025-01-15T12:36:36","modified_gmt":"2025-01-15T04:36:36","slug":"ebpf%e5%a6%82%e4%bd%95%e5%b8%ae%e5%8a%a9%e5%ae%9e%e7%8e%b0%e6%9b%b4%e7%b2%be%e7%bb%86%e7%9a%84%e6%9d%83%e9%99%90%e6%8e%a7%e5%88%b6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/31962.html","title":{"rendered":"eBPF\u5982\u4f55\u5e2e\u52a9\u5b9e\u73b0\u66f4\u7cbe\u7ec6\u7684\u6743\u9650\u63a7\u5236\uff1f"},"content":{"rendered":"

\t\t\t\t\n\n

\"eBPF\u5982\u4f55\u5e2e\u52a9\u5b9e\u73b0\u66f4\u7cbe\u7ec6\u7684\u6743\u9650\u63a7\u5236\uff1f\"<\/p>\n\n<\/p>\n\n\n\n

\u5728\u5f53\u4eca\u7684\u6570\u5b57\u5316\u65f6\u4ee3\uff0c\u6743\u9650\u63a7\u5236<\/strong>\u662f\u4fdd\u969c\u7cfb\u7edf\u5b89\u5168\u7684\u6838\u5fc3\u8981\u7d20\u4e4b\u4e00\u3002\u4f20\u7edf\u7684\u6743\u9650\u7ba1\u7406\u65b9\u5f0f\u5f80\u5f80\u4f9d\u8d56\u4e8e\u7c97\u7c92\u5ea6\u7684\u8bbf\u95ee\u63a7\u5236\u5217\u8868\uff08ACL\uff09\u6216\u57fa\u4e8e\u89d2\u8272\u7684\u8bbf\u95ee\u63a7\u5236\uff08RBAC\uff09\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u867d\u7136\u7b80\u5355\u6613\u7528\uff0c\u4f46\u5728\u9762\u5bf9\u590d\u6742\u7684\u73b0\u4ee3\u5e94\u7528\u573a\u666f\u65f6\uff0c\u5f80\u5f80\u663e\u5f97\u529b\u4e0d\u4ece\u5fc3\u3002\u968f\u7740\u6280\u672f\u7684\u6f14\u8fdb\uff0ceBPF\uff08Extended Berkeley Packet Filter\uff09\u4f5c\u4e3a\u4e00\u79cd\u9769\u547d\u6027\u7684\u5185\u6838\u6280\u672f\uff0c\u6b63\u5728\u4e3a\u6743\u9650\u63a7\u5236\u5e26\u6765\u5168\u65b0\u7684\u53ef\u80fd\u6027\u3002\u5b83\u4e0d\u4ec5\u80fd\u591f\u5b9e\u73b0\u66f4\u7cbe\u7ec6\u7684\u6743\u9650\u7ba1\u7406\uff0c\u8fd8\u80fd\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u8c03\u6574\u7b56\u7565\uff0c\u4ece\u800c\u663e\u8457\u63d0\u5347\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u548c\u7075\u6d3b\u6027\u3002<\/p>\n\n\n\n\n

eBPF\uff1a\u5185\u6838\u4e2d\u7684\u201c\u745e\u58eb\u519b\u5200\u201d<\/strong><\/h3>\n\n\n\n\n

eBPF\u6700\u521d\u88ab\u8bbe\u8ba1\u7528\u4e8e\u7f51\u7edc\u6570\u636e\u5305\u7684\u8fc7\u6ee4\u548c\u5206\u6790\uff0c\u4f46\u5b83\u7684\u80fd\u529b\u8fdc\u4e0d\u6b62\u4e8e\u6b64\u3002\u901a\u8fc7\u5c06\u7528\u6237\u5b9a\u4e49\u7684\u4ee3\u7801\u5b89\u5168\u5730\u6ce8\u5165\u5185\u6838\uff0ceBPF\u53ef\u4ee5\u5728\u4e0d\u4fee\u6539\u5185\u6838\u6e90\u7801\u7684\u60c5\u51b5\u4e0b\uff0c\u5b9e\u73b0\u5bf9\u7cfb\u7edf\u884c\u4e3a\u7684\u6df1\u5ea6\u76d1\u63a7\u548c\u63a7\u5236\u3002\u8fd9\u79cd\u7279\u6027\u4f7f\u5f97eBPF\u6210\u4e3a\u5b9e\u73b0\u7cbe\u7ec6\u6743\u9650\u63a7\u5236<\/strong>\u7684\u7406\u60f3\u5de5\u5177\u3002<\/p>\n\n\n\n\n

\u4f20\u7edf\u7684\u6743\u9650\u63a7\u5236\u673a\u5236\u901a\u5e38\u662f\u5728\u7528\u6237\u7a7a\u95f4\u5b9e\u73b0\u7684\uff0c\u800ceBPF\u5219\u53ef\u4ee5\u76f4\u63a5\u5728\u5185\u6838\u5c42\u9762\u8fdb\u884c\u64cd\u4f5c\u3002\u8fd9\u610f\u5473\u7740\u5b83\u53ef\u4ee5\u6355\u6349\u5230\u66f4\u5e95\u5c42\u7684\u7cfb\u7edf\u8c03\u7528\u548c\u4e8b\u4ef6\uff0c\u4ece\u800c\u63d0\u4f9b\u66f4\u7ec6\u7c92\u5ea6\u7684\u63a7\u5236\u80fd\u529b\u3002\u4f8b\u5982\uff0ceBPF\u53ef\u4ee5\u76d1\u63a7\u67d0\u4e2a\u8fdb\u7a0b\u5bf9\u7279\u5b9a\u6587\u4ef6\u7684\u8bbf\u95ee\u884c\u4e3a\uff0c\u751a\u81f3\u53ef\u4ee5\u7cbe\u786e\u5230\u5177\u4f53\u7684\u7cfb\u7edf\u8c03\u7528\u53c2\u6570\u3002<\/p>\n\n\n\n\n

eBPF\u5982\u4f55\u5b9e\u73b0\u7cbe\u7ec6\u6743\u9650\u63a7\u5236\uff1f<\/strong><\/h3>\n\n\n\n\n

1. \u52a8\u6001\u76d1\u63a7\u4e0e\u62e6\u622a<\/strong><\/h4>\n\n\n\n\n

eBPF\u7684\u6838\u5fc3\u4f18\u52bf\u4e4b\u4e00\u662f\u5176\u52a8\u6001\u6027<\/strong>\u3002\u4f20\u7edf\u7684\u6743\u9650\u63a7\u5236\u673a\u5236\u901a\u5e38\u9700\u8981\u5728\u7cfb\u7edf\u542f\u52a8\u65f6\u52a0\u8f7d\u89c4\u5219\uff0c\u800ceBPF\u5219\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u52a0\u8f7d\u548c\u66f4\u65b0\u7b56\u7565\u3002\u8fd9\u79cd\u80fd\u529b\u4f7f\u5f97\u7cfb\u7edf\u7ba1\u7406\u5458\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\uff0c\u5b9e\u65f6\u8c03\u6574\u6743\u9650\u63a7\u5236\u89c4\u5219\uff0c\u800c\u65e0\u9700\u91cd\u542f\u7cfb\u7edf\u3002<\/p>\n\n\n\n\n

\u4f8b\u5982\uff0c\u5047\u8bbe\u67d0\u4e2a\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u4e34\u65f6\u8bbf\u95ee\u4e00\u4e2a\u654f\u611f\u6587\u4ef6\uff0c\u4f20\u7edf\u7684\u6743\u9650\u63a7\u5236\u673a\u5236\u53ef\u80fd\u9700\u8981\u4fee\u6539\u6587\u4ef6\u6743\u9650\u6216\u91cd\u65b0\u914d\u7f6eACL\uff0c\u800ceBPF\u5219\u53ef\u4ee5\u901a\u8fc7\u52a8\u6001\u52a0\u8f7d\u7684\u7b56\u7565\uff0c\u5141\u8bb8\u8be5\u5e94\u7528\u7a0b\u5e8f\u5728\u7279\u5b9a\u65f6\u95f4\u6bb5\u5185\u8bbf\u95ee\u8be5\u6587\u4ef6\uff0c\u5e76\u5728\u4efb\u52a1\u5b8c\u6210\u540e\u81ea\u52a8\u64a4\u9500\u6743\u9650\u3002<\/p>\n\n\n\n\n

2. \u7ec6\u7c92\u5ea6\u7684\u8bbf\u95ee\u63a7\u5236<\/strong><\/h4>\n\n\n\n\n

eBPF\u7684\u53e6\u4e00\u4e2a\u91cd\u8981\u7279\u6027\u662f\u5176\u7ec6\u7c92\u5ea6<\/strong>\u3002\u4f20\u7edf\u7684\u6743\u9650\u63a7\u5236\u673a\u5236\u901a\u5e38\u53ea\u80fd\u57fa\u4e8e\u7528\u6237\u3001\u7ec4\u6216\u89d2\u8272\u8fdb\u884c\u63a7\u5236\uff0c\u800ceBPF\u5219\u53ef\u4ee5\u6df1\u5165\u5230\u7cfb\u7edf\u8c03\u7528\u7684\u5c42\u9762\u3002\u4f8b\u5982\uff0c\u5b83\u53ef\u4ee5\u76d1\u63a7\u67d0\u4e2a\u8fdb\u7a0b\u662f\u5426\u8c03\u7528\u4e86open()<\/code>\u7cfb\u7edf\u8c03\u7528\uff0c\u5e76\u68c0\u67e5\u5176\u53c2\u6570\u4ee5\u786e\u5b9a\u662f\u5426\u5141\u8bb8\u8bbf\u95ee\u3002<\/p>\n\n\n\n\n

\u8fd9\u79cd\u7ec6\u7c92\u5ea6\u7684\u63a7\u5236\u80fd\u529b\u4f7f\u5f97eBPF\u53ef\u4ee5\u5e94\u5bf9\u66f4\u590d\u6742\u7684\u5b89\u5168\u9700\u6c42\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u4e2a\u591a\u79df\u6237\u73af\u5883\u4e2d\uff0c\u7ba1\u7406\u5458\u53ef\u4ee5\u901a\u8fc7eBPF\u786e\u4fdd\u6bcf\u4e2a\u79df\u6237\u53ea\u80fd\u8bbf\u95ee\u5176\u5206\u914d\u7684\u8d44\u6e90\uff0c\u800c\u4e0d\u4f1a\u5f71\u54cd\u5230\u5176\u4ed6\u79df\u6237\u3002<\/p>\n\n\n\n\n

3. \u5b9e\u65f6\u5206\u6790\u4e0e\u54cd\u5e94<\/strong><\/h4>\n\n\n\n\n

eBPF\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u6743\u9650\u63a7\u5236\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u65f6\u5206\u6790\u548c\u54cd\u5e94\u3002\u901a\u8fc7\u5c06eBPF\u7a0b\u5e8f\u9644\u52a0\u5230\u7279\u5b9a\u7684\u5185\u6838\u4e8b\u4ef6\u4e0a\uff0c\u7cfb\u7edf\u7ba1\u7406\u5458\u53ef\u4ee5\u5b9e\u65f6\u76d1\u63a7\u7cfb\u7edf\u7684\u884c\u4e3a\uff0c\u5e76\u5728\u68c0\u6d4b\u5230\u5f02\u5e38\u65f6\u7acb\u5373\u91c7\u53d6\u884c\u52a8\u3002<\/p>\n\n\n\n\n

\u4f8b\u5982\uff0c\u5982\u679c\u67d0\u4e2a\u8fdb\u7a0b\u8bd5\u56fe\u8bbf\u95ee\u4e00\u4e2a\u672a\u7ecf\u6388\u6743\u7684\u6587\u4ef6\uff0ceBPF\u53ef\u4ee5\u7acb\u5373\u62e6\u622a\u8be5\u64cd\u4f5c\uff0c\u5e76\u8bb0\u5f55\u76f8\u5173\u65e5\u5fd7\u4ee5\u4f9b\u540e\u7eed\u5206\u6790\u3002\u8fd9\u79cd\u5b9e\u65f6\u54cd\u5e94\u80fd\u529b\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\u5b89\u5168\u4e8b\u4ef6\u7684\u5f71\u54cd\u8303\u56f4\uff0c\u5e76\u63d0\u9ad8\u7cfb\u7edf\u7684\u6574\u4f53\u5b89\u5168\u6027\u3002<\/p>\n\n\n\n\n

eBPF\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u6848\u4f8b<\/strong><\/h3>\n\n\n\n\n

1. \u5bb9\u5668\u5b89\u5168<\/strong><\/h4>\n\n\n\n\n

\u5728\u5bb9\u5668\u5316\u73af\u5883\u4e2d\uff0c\u6743\u9650\u63a7\u5236\u5c24\u4e3a\u91cd\u8981\u3002\u4f20\u7edf\u7684\u5bb9\u5668\u5b89\u5168\u673a\u5236\u901a\u5e38\u4f9d\u8d56\u4e8e\u547d\u540d\u7a7a\u95f4\u548c\u63a7\u5236\u7ec4\uff08cgroups\uff09\uff0c\u4f46\u8fd9\u4e9b\u673a\u5236\u5f80\u5f80\u65e0\u6cd5\u63d0\u4f9b\u8db3\u591f\u7684\u7ec6\u7c92\u5ea6\u63a7\u5236\u3002eBPF\u53ef\u4ee5\u901a\u8fc7\u76d1\u63a7\u5bb9\u5668\u7684\u7cfb\u7edf\u8c03\u7528\uff0c\u786e\u4fdd\u6bcf\u4e2a\u5bb9\u5668\u53ea\u80fd\u8bbf\u95ee\u5176\u6240\u9700\u7684\u8d44\u6e90\u3002<\/p>\n\n\n\n\n

\u4f8b\u5982\uff0c\u5f00\u6e90\u9879\u76eeCilium<\/strong>\u5c31\u5229\u7528eBPF\u5b9e\u73b0\u4e86\u5bb9\u5668\u7f51\u7edc\u7684\u5b89\u5168\u7b56\u7565\u3002\u5b83\u4e0d\u4ec5\u53ef\u4ee5\u63a7\u5236\u5bb9\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\uff0c\u8fd8\u53ef\u4ee5\u76d1\u63a7\u5bb9\u5668\u5185\u90e8\u7684\u7cfb\u7edf\u8c03\u7528\uff0c\u4ece\u800c\u63d0\u4f9b\u66f4\u5168\u9762\u7684\u5b89\u5168\u4fdd\u969c\u3002<\/p>\n\n\n\n\n

2. \u6587\u4ef6\u7cfb\u7edf\u76d1\u63a7<\/strong><\/h4>\n\n\n\n\n

\u6587\u4ef6\u7cfb\u7edf\u662f\u6743\u9650\u63a7\u5236\u7684\u91cd\u70b9\u9886\u57df\u4e4b\u4e00\u3002eBPF\u53ef\u4ee5\u901a\u8fc7\u76d1\u63a7\u6587\u4ef6\u7cfb\u7edf\u7684\u7cfb\u7edf\u8c03\u7528\uff0c\u5b9e\u73b0\u5bf9\u6587\u4ef6\u8bbf\u95ee\u7684\u7cbe\u7ec6\u63a7\u5236\u3002\u4f8b\u5982\uff0c\u5b83\u53ef\u4ee5\u786e\u4fdd\u67d0\u4e2a\u7528\u6237\u53ea\u80fd\u8bfb\u53d6\u7279\u5b9a\u6587\u4ef6\uff0c\u800c\u4e0d\u80fd\u5199\u5165\u6216\u5220\u9664\u3002<\/p>\n\n\n\n\n

\u8fd9\u79cd\u80fd\u529b\u5728\u6570\u636e\u654f\u611f\u7684\u73af\u5883\u4e2d\u5c24\u4e3a\u91cd\u8981\u3002\u4f8b\u5982\uff0c\u5728\u91d1\u878d\u6216\u533b\u7597\u884c\u4e1a\u4e2d\uff0ceBPF\u53ef\u4ee5\u786e\u4fdd\u53ea\u6709\u7ecf\u8fc7\u6388\u6743\u7684\u7528\u6237\u624d\u80fd\u8bbf\u95ee\u654f\u611f\u6570\u636e\uff0c\u4ece\u800c\u9632\u6b62\u6570\u636e\u6cc4\u9732\u3002<\/p>\n\n\n\n\n

3. \u7cfb\u7edf\u8c03\u7528\u8fc7\u6ee4<\/strong><\/h4>\n\n\n\n\n

eBPF\u8fd8\u53ef\u4ee5\u7528\u4e8e\u8fc7\u6ee4\u7cfb\u7edf\u8c03\u7528\u3002\u901a\u8fc7\u76d1\u63a7\u548c\u62e6\u622a\u7279\u5b9a\u7684\u7cfb\u7edf\u8c03\u7528\uff0ceBPF\u53ef\u4ee5\u9632\u6b62\u6076\u610f\u7a0b\u5e8f\u6267\u884c\u5371\u9669\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u5b83\u53ef\u4ee5\u963b\u6b62\u67d0\u4e2a\u8fdb\u7a0b\u8c03\u7528execve()<\/code>\u7cfb\u7edf\u8c03\u7528\uff0c\u4ece\u800c\u9632\u6b62\u5176\u6267\u884c\u6076\u610f\u4ee3\u7801\u3002<\/p>\n\n\n\n\n

\u8fd9\u79cd\u80fd\u529b\u5728\u9632\u6b62\u96f6\u65e5\u653b\u51fb\u548c\u672a\u77e5\u5a01\u80c1\u65b9\u9762\u5c24\u4e3a\u6709\u7528\u3002\u901a\u8fc7\u52a8\u6001\u52a0\u8f7deBPF\u7a0b\u5e8f\uff0c\u7cfb\u7edf\u7ba1\u7406\u5458\u53ef\u4ee5\u5feb\u901f\u54cd\u5e94\u65b0\u51fa\u73b0\u7684\u5b89\u5168\u5a01\u80c1\uff0c\u800c\u65e0\u9700\u7b49\u5f85\u5185\u6838\u8865\u4e01\u7684\u53d1\u5e03\u3002<\/p>\n\n\n\n\n

eBPF\u7684\u6311\u6218\u4e0e\u672a\u6765<\/strong><\/h3>\n\n\n\n\n

\u5c3d\u7ba1eBPF\u5728\u6743\u9650\u63a7\u5236\u65b9\u9762\u5c55\u73b0\u51fa\u4e86\u5de8\u5927\u7684\u6f5c\u529b\uff0c\u4f46\u5b83\u4e5f\u9762\u4e34\u4e00\u4e9b\u6311\u6218\u3002\u9996\u5148\uff0ceBPF\u7a0b\u5e8f\u7684\u7f16\u5199\u548c\u8c03\u8bd5\u9700\u8981\u8f83\u9ad8\u7684\u6280\u672f\u6c34\u5e73\uff0c\u8fd9\u5bf9\u4e8e\u666e\u901a\u7cfb\u7edf\u7ba1\u7406\u5458\u6765\u8bf4\u53ef\u80fd\u662f\u4e00\u4e2a\u95e8\u69db\u3002\u5176\u6b21\uff0ceBPF\u7684\u6027\u80fd\u5f00\u9500\u867d\u7136\u8f83\u4f4e\uff0c\u4f46\u5728\u9ad8\u8d1f\u8f7d\u73af\u5883\u4e0b\u4ecd\u53ef\u80fd\u5bf9\u7cfb\u7edf\u6027\u80fd\u4ea7\u751f\u5f71\u54cd\u3002<\/p>\n\n\n\n\n

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