{"id":1615,"date":"2023-07-07T10:26:27","date_gmt":"2023-07-07T02:26:27","guid":{"rendered":"https:\/\/www.myway5.com\/?p=1615"},"modified":"2023-07-07T11:13:38","modified_gmt":"2023-07-07T03:13:38","slug":"network-issue","status":"publish","type":"post","link":"https:\/\/www.myway5.com\/index.php\/2023\/07\/07\/network-issue\/","title":{"rendered":"\u4e00\u6b21\u7f51\u7edc\u5ef6\u8fdf\u9ad8\u7684\u95ee\u9898\u6392\u67e5"},"content":{"rendered":"

\u95ee\u9898\u80cc\u666f<\/h2>\n

\u5ba2\u6237\u7684\u673a\u623f\u90e8\u7f72\u4e86\u591a\u5957\u4e0d\u540c\u67b6\u6784\u7684 k8s \u96c6\u7fa4\uff1aIntel CPU + redhat OS\uff0c\u6d77\u5149 CPU + \u9e92\u9e9f OS\u3002\u5176\u4e2d Intel CPU + redhat OS \u7684 k8s \u5df2\u7ecf\u7a33\u5b9a\u8fd0\u884c\u4e86\u5f88\u4e45\u3002\u6d77\u5149 CPU + \u9e92\u9e9f OS \u662f\u540e\u6765\u4e0a\u7ebf\u7684\uff0c\u4e3b\u8981\u662f\u4e3a\u4e86\u6ee1\u8db3\u4fe1\u521b\u7684\u8981\u6c42\u3002\u4f46\u662f\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u53d1\u73b0\uff0c\u6d77\u5149 CPU + \u9e92\u9e9f OS \u7684 k8s \u96c6\u7fa4\u4e2d\uff0c\u8fd0\u884c\u7684\u670d\u52a1\u5728\u538b\u6d4b\u65f6\u4f1a\u5076\u73b0\u670d\u52a1\u8bf7\u6c42 redis \u8d85\u65f6\u7684\u5f02\u5e38\u3002<\/p>\n

\u95ee\u9898\u5b9a\u4f4d<\/h2>\n

\u56e0\u4e3a\u540c\u6837\u7684\u670d\u52a1\uff0c\u5728\u975e\u4fe1\u521b\u7684\u673a\u5668\u4e0a\u53ef\u4ee5\u6b63\u5e38\u8fd0\u884c\uff0c\u56e0\u6b64\u6392\u9664\u670d\u52a1\u672c\u8eab\u7684\u95ee\u9898\u3002\u4e3b\u8981\u6392\u67e5\u786c\u4ef6+\u64cd\u4f5c\u7cfb\u7edf+ k8s CNI \u8fd9\u51e0\u4e2a\u73af\u8282\u3002\u8fd9\u91cc\u4e4b\u6240\u4ee5\u8981\u6392\u67e5 CNI \u7684\u95ee\u9898\uff0c\u4e3b\u8981\u8fd8\u662f\u8003\u8651\u8fd9\u4e2a CNI \u662f\u4e13\u95e8\u4e3a\u8fd9\u4e2a\u5ba2\u6237\u5f00\u53d1\u7684\uff0c\u7528\u6765\u5b9e\u73b0 Underlay \u7684\u7f51\u7edc\uff0c\u4ee5\u53ca\u4e00\u7cfb\u5217\u7684\u7279\u6b8a\u7f51\u7edc\u9700\u6c42\u3002<\/p>\n

\u6574\u4e2a\u7f51\u7edc\u7684\u94fe\u8def\u5982\u56fe\u6240\u793a\uff1a<\/p>\n

\"network1\"<\/p>\n

\u6293\u5305\u5206\u6790<\/h3>\n

\u9996\u5148\u662f\u5728 Pod \u5185\u7528 tcpdump \u8fdb\u884c\u957f\u65f6\u95f4\u7684\u6293\u5305\uff0c\u4fdd\u5b58\u7684\u672c\u5730\u6587\u4ef6\u3002\u7136\u540e\u8fdb\u884c\u538b\u6d4b\u6765\u590d\u73b0\u95ee\u9898\u3002\u6839\u636e\u65e5\u5fd7\u627e\u5230\u51fa\u95ee\u9898\u7684\u65f6\u95f4\u70b9\uff0c\u7528 wireshark \u81ea\u5e26\u7684\u547d\u4ee4\u5bf9\u6293\u5305\u6587\u4ef6\u6309\u65f6\u95f4\u5207\u5272\u3002<\/p>\n

# \u6bcf 10s \u4fdd\u5b58\u4e00\u4e2a\u5206\u7247\u3002\neditcap -i 10 tcpdump.cap pod1111\n<\/code><\/pre>\n
\u7528 wireshark \u6253\u5f00\u5bf9\u5e94\u65f6\u95f4\u7247\u6bb5\u7684\u6293\u5305\u6587\u4ef6\u8fdb\u884c\u5206\u6790\u3002\u8fd9\u91cc\u56e0\u4e3a\u5b89\u5168\u8981\u6c42\u4e0d\u65b9\u4fbf\u653e\u4e0a\u5f02\u5e38\u5305\u7684\u622a\u56fe\u3002\u5927\u6982\u63cf\u8ff0\u4e00\u4e0b\u95ee\u9898\u73b0\u8c61\uff1a\u5206\u6790\u7684\u662f tcp \u5305\uff0c\u8868\u73b0\u4e3a\u5f02\u5e38\u65f6\u95f4\u70b9 redis \u56de\u5305\u5b58\u5728\u5927\u91cf\u91cd\u4f20\uff0c\u4e14\u91cd\u4f20\u7684\u5305\u51e0\u4e4e\u90fd\u5728\u540c\u4e00\u65f6\u523b\u5230\u8fbe Pod \u5185\u3002<\/p>\n
\u56e0\u6b64\u4e0b\u4e00\u6b65\u8981\u6392\u67e5 tcp \u5305\u7684\u5ef6\u8fdf\u53d1\u751f\u94fe\u8def\u4e0a\u7684\u4ec0\u4e48\u4f4d\u7f6e\u3002\u56e0\u6b64\u9009\u62e9\u540c\u65f6\u5728 redis \u865a\u62df\u673a\uff0c\u7269\u7406\u673a\u7f51\u5361 eth0\uff0cpod \u5185\u7f51\u5361\u6293\u5305\u3002\u7136\u540e\u7528\u540c\u6837\u7684\u65b9\u5f0f\u8fdb\u884c\u95ee\u9898\u590d\u73b0\u3002<\/p>\n
\u56e0\u4e3a\u6709\u4e86\u591a\u4e2a\u4f4d\u7f6e\u70b9\u7684\u6293\u5305\u6570\u636e\uff0c\u6839\u636e tcp \u7684 seq \u53f7\u5c31\u53ef\u4ee5\u5206\u6790\u540c\u4e00\u4e2a\u6570\u636e\u5305\u4ece redis \u865a\u62df\u673a\u53d1\u51fa\u6765\u7684\u65f6\u95f4\uff0c\u4ee5\u53ca\u5230\u8fbe\u7269\u7406\u673a eth0 \u4ee5\u53ca Pod \u5185\u7684\u65f6\u95f4\u3002\u7136\u540e\u6839\u636e\u65f6\u95f4\u5c31\u53ef\u4ee5\u627e\u5230\u5ef6\u8fdf\u70b9\u5728\u54ea\u3002<\/p>\n
\u5206\u6790\u540e\u53d1\u73b0\u5ef6\u8fdf\u5728 redis\u2192\u7269\u7406\u673a\u8fd9\u6761\u94fe\u8def\u4e0a\u3002redis \u51fa\u6765\u7684\u5305\u56e0\u4e3a\u5ef6\u8fdf\u5230\u8fbe\u4e86\u7269\u7406\u673a\uff0c\u56e0\u6b64\u4e5f\u5ef6\u8fdf\u5230\u8fbe Pod \u5185\u3002redis \u6240\u5728\u7684\u865a\u62df\u673a\u53d1\u5305\u540e\u56e0\u4e3a\u4e00\u76f4\u6ca1\u6709\u6536\u5230\u56de\u62a5\uff0c\u56e0\u6b64\u4f1a\u89e6\u53d1 tcp \u7684\u91cd\u4f20\u673a\u5236\u3002\u4f46\u662f\u91cd\u4f20\u7684\u5305\u4e5f\u51fa\u73b0\u4e86\u5ef6\u8fdf\u3002\u6700\u7ec8\u539f\u59cb\u5305\u548c\u91cd\u4f20\u5305\u5728\u67d0\u4e00\u523b\u540c\u65f6\u8fdb\u5165\u4e86\u7269\u7406\u673a\u3002<\/p>\n
\u56e0\u6b64\u6000\u7591\u662f\u4ea4\u6362\u673a\u4e0a\u51fa\u73b0\u4e86\u5ef6\u8fdf\uff0c\u4f46\u662f\u5982\u679c\u662f\u4ea4\u6362\u673a\u7684\u95ee\u9898\uff0c\u90a3\u4e48\u63a5\u5165\u8be5\u4ea4\u6362\u673a\u7684\u5176\u4ed6\u673a\u5668\u4e5f\u4e00\u5b9a\u4f1a\u51fa\u95ee\u9898\u624d\u5bf9\u3002\u4f46\u662f\u73b0\u8c61\u4ec5\u5c40\u9650\u4e8e\u4fe1\u521b\u670d\u52a1\u5668\u4e0a\u3002\u6240\u4ee5\u4e5f\u548c\u9e92\u9e9f\u7684\u4f9b\u5e94\u5546\u6c9f\u901a\u4e86\uff0c\u4ed6\u4eec\u6000\u7591\u662f\u4e00\u4e2a\u5df2\u77e5\u7684 cgroup \u95ee\u9898\u5bfc\u81f4\u7684\uff0c\u51fa\u73b0\u5728 4.19 \u524d\u7684\u5185\u6838\u91cc\u3002\u5347\u7ea7\u5185\u6838\u540e\u679c\u7136\u95ee\u9898\u5c31\u89e3\u51b3\u4e86\u3002<\/p>\n
\u95ee\u9898\u5206\u6790<\/h2>\n
\u4e0a\u9762\u8bf4\u7684 cgroup \u95ee\u9898\uff0c\u8be6\u7ec6\u6765\u8bf4\u662f kubelet \u4e2d\u7684 cadvisor \u5728\u91c7\u96c6 node \u7684\u5185\u5b58\u4fe1\u606f\u65f6\uff0c\u4f1a\u8bfb\u53d6 \/sys\/fs\/cgroup\/memory\/memory.numa_stat \u4fe1\u606f\u3002\u4f46\u662f\u56e0\u4e3a\u5185\u6838\u7684\u5b9e\u73b0\u4f1a\u5bfc\u81f4\u8fd9\u4e2a\u8bfb\u53d6\u4fe1\u606f\u7684\u7cfb\u7edf\u8c03\u7528\u5f88\u6162\u3002\u6162\u7684\u539f\u56e0\u6709\u4e24\u70b9\uff1a<\/p>\n
    \n
  1. cgroup \u662f\u901a\u8fc7 cgroup \u4f2a\u6587\u4ef6\u7cfb\u7edf\u6765\u7ba1\u7406\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\u5220\u9664\u4f2a\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\u76ee\u5f55\u6765\u5220\u9664\u76f8\u5e94\u7684 cgroup\u3002\u4f46\u662f\u5185\u6838\u4e2d\u4ee3\u8868 cgroup \u7684\u7ed3\u6784\u4f53\u4f1a\u4ecd\u7136\u5b58\u5728\uff0c\u76f4\u5230\u6240\u6709\u5bf9\u5b83\u7684\u5f15\u7528\u88ab\u91ca\u653e\u3002\u53ea\u6709\u5f53\u88ab\u5220\u9664\u7684 memory cgroup \u4e2d\u7684\u9875\u90fd\u88ab\u56de\u6536\u6389\uff0c\u76f8\u5e94\u7684\u5f15\u7528\u90fd\u88ab\u91ca\u653e\uff0c\u8be5 memory cgroup \u624d\u4f1a\u88ab\u5f7b\u5e95\u5220\u9664\u3002\u7cfb\u7edf\u4e2d\u6240\u6709\u7684 memory cgroup \u6570\u91cf\u53ef\u4ee5\u901a\u8fc7 cat \/proc\/cgroups<\/code> \u6765\u67e5\u770b\u3002\u800c\u5185\u5b58\u9875\u7684\u56de\u6536\u65f6\u95f4\u4e0e\u5185\u6838\u7684\u56de\u6536\u673a\u5236\u6709\u5173\uff0c\u5982\u679c\u5f53\u4e2d\u6709\u4e00\u4e9b\u9875\u4e00\u76f4\u6d3b\u8dc3\u7684\u88ab\u4f7f\u7528\uff0c\u5c31\u53ef\u80fd\u6c38\u8fdc\u4e0d\u4f1a\u88ab\u56de\u6536\u3002<\/li>\n
  2. cadvisor \u8bfb\u53d6 \/sys\/fs\/cgroup\/memory\/memory.numa_stat \u4fe1\u606f\u65f6\uff0c\u5176\u5b9e\u662f\u4e00\u4e2a\u7cfb\u7edf\u8c03\u7528\u3002\u8fd9\u4e2a\u8c03\u7528\u7684\u5b9e\u73b0\u4e5f\u5b58\u5728\u6027\u80fd\u95ee\u9898\uff0c\u5b83\u4f1a\u904d\u5386\u6240\u6709\u7684\u5b50 cgroup \u5c42\u7ea7\uff0c\u7d2f\u52a0 memory \u7684\u4f7f\u7528\u4fe1\u606f\u6c42\u548c\uff0c\u5f97\u5230\u603b\u7684 memory \u4f7f\u7528\u60c5\u51b5\u3002<\/li>\n<\/ol>\n
    \u56e0\u6b64\uff0c\u5728\u4e00\u53f0\u4e00\u76f4\u8fd0\u884c\u7684\u670d\u52a1\u5668\u4e0a\uff0cmemory cgroup \u53ef\u80fd\u4f1a\u8fbe\u5230 1w+\u3002cadvisor \u5728\u83b7\u53d6 memory cgroup \u65f6\u53ef\u80fd\u8017\u8d39 1s \u4ee5\u4e0a\u7684\u65f6\u95f4\u3002\u5728\u8fd9\u6bb5\u65f6\u95f4\u5185\uff0cCPU \u6ca1\u6cd5\u88ab\u8c03\u5ea6\u7ed9\u5176\u4ed6\u5730\u65b9\u4f7f\u7528\u3002<\/p>\n
    \u90a3\u4e3a\u4ec0\u4e48\u4f1a\u5bfc\u81f4\u7f51\u7edc\u7684\u5ef6\u8fdf\u5462\uff1flinux \u7f51\u7edc\u6570\u636e\u5305\u7684\u63a5\u6536\uff0c\u5728\u4e4b\u524d\u7684\u6587\u7ae0 linux \u7f51\u7edc\u6570\u636e\u5305\u63a5\u6536\u6d41\u7a0b\uff08\u4e00\uff09<\/a>\u4e2d\u6574\u7406\u8fc7\u3002\u6570\u636e\u5305\u5230\u8fbe\u7f51\u5361\u540e\uff0c\u4f9d\u8d56\u786c\u4e2d\u65ad(3)+\u8f6f\u4e2d\u65ad(6)\u6765\u89e6\u53d1 CPU \u5bf9\u6570\u636e\u5305\u8fdb\u884c\u5904\u7406\u3002<\/p>\n
    \"network2\"<\/p>\n
    \u5e76\u4e14\u73b0\u5728\u7684\u7f51\u5361\u5f88\u591a\u90fd\u662f\u591a\u961f\u5217\u7684\uff0c\u6bcf\u6761\u961f\u5217\u548c\u67d0\u4e2a CPU \u8fdb\u884c\u7ed1\u5b9a\uff0c\u7531\u8be5 CPU \u8fdb\u884c\u5904\u7406\u3002\u56e0\u6b64\u5982\u679c\u8fd9\u4e2a\u8f6f\u4e2d\u65ad\u53d1\u751f\u5728 cadvisor \u7edf\u8ba1 memory cgroup\uff0c\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u65f6\uff0c\u8f6f\u4e2d\u65ad\u7684\u5904\u7406\u5c31\u53ef\u80fd\u56e0\u6b64\u800c\u5ef6\u8fdf\u3002\u5982\u679c\u8fd9\u4e2a\u8fc7\u7a0b\u6301\u7eed 1s+\uff0c\u90a3\u4e48\u5f15\u8d77\u7684\u73b0\u8c61\u53ef\u80fd\u5c31\u662f\u5bf9\u7aef tcp \u51fa\u73b0\u91cd\u4f20\u3002\u5982\u679c\u8fd9\u4e2a\u8fc7\u7a0b\u6301\u7eed 2s+\uff0c\u90a3\u4e48\u56e0\u4e3a\u670d\u52a1\u672c\u8eab\u8bfb\u53d6 redis \u7684\u8d85\u65f6\u65f6\u95f4\u8bbe\u7f6e\u4e3a 2s\uff0c\u5c31\u53ef\u80fd\u51fa\u73b0\u8d85\u65f6\u4e86\u3002<\/p>\n
    \u89e3\u51b3\u65b9\u6848<\/h2>\n
    \u957f\u671f\u89e3\u51b3\u65b9\u6848\u5c31\u662f\u5347\u7ea7\u5185\u6838\u3002\u5728\u66f4\u9ad8\u7684\u7248\u672c\u5185\u6838\u4e2d\uff0c\u5bf9 cgroup memory \u7684\u8ba1\u7b97\u8fdb\u884c\u4e86\u4f18\u5316\uff0c\u8fd9\u91cc\u4e0d\u518d\u4f1a\u904d\u5386\u6240\u6709\u7684\u5b50 memory cgroup \u8fdb\u884c\u7edf\u8ba1\u4e86\u3002\u56e0\u4e3a\u672c\u8eab cgroup \u5c31\u5df2\u7ecf\u7ef4\u62a4\u4e86\u8be5\u4fe1\u606f\uff0c\u76f4\u63a5\u8bfb\u53d6\u5e76\u8fd4\u56de\u5c31\u884c\u4e86\u3002\u5185\u6838\u76f8\u5173\u4fee\u590d\uff1ahttps:\/\/git.kernel.org\/pub\/scm\/linux\/kernel\/git\/torvalds\/linux.git\/commit\/?h=v6.2-rc7&id=dd8657b6c1cb5e65b13445b4a038736e81cf80ea<\/p>\n
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