{"id":43114,"date":"2025-06-30T18:55:43","date_gmt":"2025-06-30T09:55:43","guid":{"rendered":"https:\/\/jouhou.main.jp\/?p=43114"},"modified":"2026-01-08T18:49:34","modified_gmt":"2026-01-08T09:49:34","slug":"red-hat-eaddrnotavail-99-%e8%a7%a3%e8%aa%ac-%e6%8c%87%e5%ae%9a%e3%82%a2%e3%83%89%e3%83%ac%e3%82%b9%e5%88%a9%e7%94%a8%e4%b8%8d%e5%8f%af%e3%82%a8%e3%83%a9%e3%83%bc%e3%81%ae%e5%8e%9f%e5%9b%a0","status":"publish","type":"post","link":"https:\/\/jouhou.main.jp\/?p=43114","title":{"rendered":"Red\u00a0Hat EADDRNOTAVAIL (99) \u89e3\u8aac: \u6307\u5b9a\u30a2\u30c9\u30ec\u30b9\u5229\u7528\u4e0d\u53ef\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u7a76\u660e\u3068\u518d\u8a2d\u5b9a\u7b56\u7de8"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"43114\" class=\"elementor elementor-43114\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-32aab32 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"32aab32\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ec9bb0d\" data-id=\"ec9bb0d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8e93f2a elementor-widget elementor-widget-html\" data-id=\"8e93f2a\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\r\n\r\n<div style=\"margin:0; padding:30pt; background-color:#EEEEEE;\"> <p style=\"margin:0 0 8px 0; font-size:1.2em;\"><strong>\u3082\u304f\u3058<\/strong><\/p> <ul style=\"list-style-type:none; padding-left:0; margin:0;\"> <li style=\"margin:40px 0;\"><a href=\"#sec01\">\u7b2c1\u7ae0\uff1a\u300c\u6628\u65e5\u307e\u3067\u52d5\u3044\u3066\u3044\u305f\u306e\u306b\u300d\u2014\u672c\u756a\u3067\u7a81\u7136\u51fa\u308bEADDRNOTAVAIL(99)\u306e\u7406\u4e0d\u5c3d<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec02\">\u7b2c2\u7ae0\uff1a\u30a8\u30e9\u30fc\u540d\u306b\u9a19\u3055\u308c\u306a\u3044\uff1aEADDRNOTAVAIL\u306f\u300cbind\/connect\u306e\u4f4f\u6240\u4e0d\u4e00\u81f4\u300d<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec03\">\u7b2c3\u7ae0\uff1a\u307e\u305a\u7591\u3046\u3079\u304d\u4f0f\u7dda\uff1a\u305d\u306eIP\u30a2\u30c9\u30ec\u30b9\u3001\u672c\u5f53\u306b\u4eca\u3053\u306e\u30db\u30b9\u30c8\u306b\u8f09\u3063\u3066\u308b\uff1f<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec04\">\u7b2c4\u7ae0\uff1aDHCP\/VRRP\/\u30af\u30e9\u30b9\u30bf\u5207\u66ff\u3067\u201c\u6307\u5b9a\u30a2\u30c9\u30ec\u30b9\u201d\u304c\u6d88\u3048\u308b\u77ac\u9593<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec05\">\u7b2c5\u7ae0\uff1a\u30b3\u30f3\u30c6\u30ca\u3068Kubernetes\uff1aPod\u306e\u4e16\u754c\u304b\u3089\u898b\u305f\u300c\u5229\u7528\u53ef\u80fd\u306a\u30a2\u30c9\u30ec\u30b9\u300d<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec06\">\u7b2c6\u7ae0\uff1aIPv6\/IPv4\u30df\u30b9\u30de\u30c3\u30c1\uff1agetaddrinfo\u306e\u7d50\u679c\u3068sysctl\u8a2d\u5b9a\u306e\u30ba\u30ec<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec07\">\u7b2c7\u7ae0\uff1a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff0f\u30dd\u30ea\u30b7\u30fc\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff1a\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u56fa\u5b9a\u306e\u843d\u3068\u3057\u7a74<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec08\">\u7b2c8\u7ae0\uff1a\u518d\u8a2d\u5b9a\u7b56\uff08OS\u5074\uff09\uff1aip addr \/ nmcli \/ NetworkManager\u3067\u201c\u6b63\u3057\u3044\u4f4f\u6240\u201d\u3092\u53d6\u308a\u623b\u3059<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec09\">\u7b2c9\u7ae0\uff1a\u518d\u8a2d\u5b9a\u7b56\uff08\u30a2\u30d7\u30ea\u5074\uff09\uff1a0.0.0.0 bind\u3001\u518d\u89e3\u6c7a\u3001\u30ea\u30c8\u30e9\u30a4\u8a2d\u8a08\u3067\u74b0\u5883\u5909\u5316\u306b\u5f37\u304f\u3059\u308b<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec10\">\u7b2c10\u7ae0\uff1a\u5e30\u7d50\uff1a\u300c\u6307\u5b9a\u300d\u306f\u5951\u7d04\u2014\u30a2\u30c9\u30ec\u30b9\u3068\u69cb\u6210\u3092\u201c\u524d\u63d0\u201d\u306b\u3057\u306a\u3044\u904b\u7528\u3078<\/a><\/li> <\/ul> <\/div> \r\n\r\n\r\n\r\n<p><strong>\u3010\u6ce8\u610f\u3011<\/strong> \u672c\u8a18\u4e8b\u306f EADDRNOTAVAIL (99) \u306e\u4e00\u822c\u7684\u306a\u539f\u56e0\u6574\u7406\u3068\u78ba\u8a8d\u624b\u9806\u306e\u89e3\u8aac\u3067\u3059\u3002\u904b\u7528\u4e2d\u306e\u672c\u756a\u74b0\u5883\u3067\u62d9\u901f\u306b\u8a2d\u5b9a\u5909\u66f4\u30fb\u518d\u8d77\u52d5\u30fb\u518d\u30c7\u30d7\u30ed\u30a4\u3092\u7e70\u308a\u8fd4\u3059\u3068\u3001\u5207\u308a\u5206\u3051\u60c5\u5831\u3092\u5931\u3044\u3001\u5f71\u97ff\u7bc4\u56f2\u3092\u5e83\u3052\u308b\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002\u72b6\u6cc1\u304c\u8907\u96d1\uff08\u30af\u30e9\u30b9\u30bf\/\u30b3\u30f3\u30c6\u30ca\/\u8907\u6570NIC\/\u7d4c\u8def\u5236\u5fa1\/\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u4ef6\uff09\u306a\u5834\u5408\u306f\u3001<strong>\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240<\/strong>\u306e\u3088\u3046\u306a\u5c02\u9580\u4e8b\u696d\u8005\u3078\u306e\u76f8\u8ac7\u3092\u512a\u5148\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\uff1ahttps:\/\/jouhou.main.jp\/?page_id=26983 \uff0f\u96fb\u8a71\uff1a0120-838-831\uff09\u3002<\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec01\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u300c\u6628\u65e5\u307e\u3067\u52d5\u3044\u3066\u3044\u305f\u306e\u306b\u300d\u2014\u672c\u756a\u3067\u7a81\u7136\u51fa\u308bEADDRNOTAVAIL(99)\u306e\u7406\u4e0d\u5c3d<\/h2> <p>\u73fe\u5834\u3067\u3053\u306e\u30a8\u30e9\u30fc\u306b\u906d\u9047\u3059\u308b\u5178\u578b\u306f\u3001\u3053\u3093\u306a\u77ac\u9593\u3067\u3059\u3002\u30c7\u30d7\u30ed\u30a4\u81ea\u4f53\u306f\u901a\u308b\u3002\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u3082\uff08\u305f\u307e\u306b\uff09\u901a\u308b\u3002\u306a\u306e\u306b\u671d\u30a4\u30c1\u3067\u76e3\u8996\u304c\u8d64\u304f\u306a\u308a\u3001\u30ed\u30b0\u306b\u306f <strong>EADDRNOTAVAIL (99)<\/strong>\u3002\u95a2\u4fc2\u8005\u304b\u3089\u306f\u300c\u7d50\u5c40\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff1f\u300d\u300c\u30a2\u30d7\u30ea\u304c\u60aa\u3044\uff1f\u300d\u3068\u805e\u304b\u308c\u3001\u3053\u3061\u3089\u306f\u5fc3\u306e\u4e2d\u3067\u3053\u3046\u601d\u3046\u3002<\/p> <p>\u300c\u3044\u3084\u3001\u6628\u65e5\u307e\u3067\u52d5\u3044\u3066\u305f\u3093\u3060\u3063\u3066\u2026\u2026\u3002\u3057\u304b\u3082\u201c\u6307\u5b9a\u30a2\u30c9\u30ec\u30b9\u5229\u7528\u4e0d\u53ef\u201d\u3063\u3066\u3001\u3053\u3063\u3061\u304c\u6307\u5b9a\u3057\u305f\u524d\u63d0\u304c\u5d29\u308c\u305f\u3063\u3066\u3053\u3068\u3060\u3088\u306d\uff1f\u300d<\/p> <p>\u3053\u3053\u3067\u5927\u4e8b\u306a\u306e\u306f\u3001\u6700\u521d\u306b\u201c\u30c0\u30e1\u30fc\u30b8\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u201d\u3092\u9078\u3076\u3053\u3068\u3067\u3059\u3002EADDRNOTAVAIL \u306f\u3001\u7126\u3063\u3066\u8a2d\u5b9a\u3092\u3044\u3058\u308b\u307b\u3069\u300c\u3069\u3053\u304c\u30ba\u30ec\u305f\u306e\u304b\u300d\u3068\u3044\u3046\u8a3c\u62e0\u3092\u6d88\u3057\u3084\u3059\u3044\u30bf\u30a4\u30d7\u306e\u30c8\u30e9\u30d6\u30eb\u3067\u3059\u3002\u9006\u306b\u8a00\u3046\u3068\u3001\u6700\u521d\u306e5\u5206\u3067\u89b3\u6e2c\u70b9\u3092\u78ba\u4fdd\u3067\u304d\u308b\u304b\u3069\u3046\u304b\u3067\u3001\u305d\u306e\u65e5\u306e\u8ca0\u8377\u304c\u5909\u308f\u308a\u307e\u3059\u3002<\/p> <h3>\u6700\u521d\u306e5\u5206\u3067\u3084\u308b\u3053\u3068\uff08\u58ca\u3055\u306a\u3044\u89b3\u6e2c\uff09<\/h3> <ul> <li>\u518d\u8d77\u52d5\u30eb\u30fc\u30d7\uff08systemd\u306eRestart=always \u7b49\uff09\u3092\u4e00\u5ea6\u6b62\u3081\u3001\u30ed\u30b0\u304c\u6d41\u308c\u7d9a\u3051\u306a\u3044\u72b6\u614b\u306b\u3059\u308b<\/li> <li>\u305d\u306e\u6642\u70b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u72b6\u614b\u3092\u4fdd\u5b58\uff08IP\u3001\u7d4c\u8def\u3001\u30bd\u30b1\u30c3\u30c8\u3001sysctl\uff09<\/li> <li>\u300c\u3044\u3064\u304b\u3089\u300d\u300c\u3069\u306e\u30ce\u30fc\u30c9\u3060\u3051\u300d\u300clisten\u306a\u306e\u304bconnect\u306a\u306e\u304b\u300d\u3092\u5207\u308a\u5206\u3051\u308b<\/li> <\/ul> <p>\u5177\u4f53\u7684\u306b\u306f\u3001\u6b21\u306e\u201c\u89b3\u6e2c\u30b3\u30de\u30f3\u30c9\u201d\u3092\u305d\u306e\u307e\u307e\u63a7\u3048\u3068\u3057\u3066\u6b8b\u3057\u307e\u3059\uff08\u8cbc\u308a\u4ed8\u3051\u5148\u306f\u30c1\u30b1\u30c3\u30c8\u3067\u3082\u969c\u5bb3\u5831\u544a\u3067\u3082\u69cb\u3044\u307e\u305b\u3093\uff09\u3002<\/p> <pre><code>date uname -a ip -br addr ip route nmcli -t dev status ss -lntp ss -s sysctl net.ipv4.ip_nonlocal_bind net.ipv4.ip_local_port_range 2&gt;\/dev\/null || true journalctl -u &lt;service_name&gt; --no-pager -n 200<\/code><\/pre> <hr> <h3>\u300cEADDRNOTAVAIL\uff1d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u843d\u3061\u305f\u300d\u3067\u306f\u306a\u3044<\/h3> <p>\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001\u56de\u7dda\u65ad\u3084DNS\u969c\u5bb3\u306e\u3088\u3046\u306a\u201c\u5916\u5074\u306e\u6545\u969c\u201d\u3060\u3051\u3092\u610f\u5473\u3057\u307e\u305b\u3093\u3002\u3080\u3057\u308d\u591a\u3044\u306e\u306f\u3001<strong>\u30a2\u30d7\u30ea\u304c\u671f\u5f85\u3057\u3066\u3044\u308b\u30ed\u30fc\u30ab\u30eb\u5074\u306e\u4f4f\u6240\uff08IP\/\u30dd\u30fc\u30c8\/\u7d4c\u8def\uff09\u304c\u3001\u4eca\u306e\u74b0\u5883\u3068\u4e00\u81f4\u3057\u3066\u3044\u306a\u3044<\/strong>\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u74b0\u5883\u304c\u5909\u308f\u3063\u305f\u306e\u306b\u8a2d\u5b9a\u304c\u8ffd\u968f\u3057\u3066\u3044\u306a\u3044\u3001\u3042\u308b\u3044\u306f\u8a2d\u8a08\u4e0a\u201c\u5909\u308f\u308a\u5f97\u308b\u201d\u3082\u306e\u3092\u56fa\u5b9a\u3057\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u3002\u305d\u3046\u3044\u3046\u30ba\u30ec\u304c\u8868\u9762\u5316\u3057\u307e\u3059\u3002<\/p> <p>\u3060\u304b\u3089\u3053\u305d\u3001\u3044\u304d\u306a\u308a\u300c\u8a2d\u5b9a\u3092\u76f4\u3059\u300d\u3088\u308a\u5148\u306b\u3001\u300c\u4f55\u304c\u56fa\u5b9a\u3055\u308c\u3066\u3044\u3066\u3001\u4f55\u304c\u5909\u308f\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u300d\u3092\u68da\u5378\u3057\u3057\u307e\u3059\u3002\u3053\u3053\u304c\u3067\u304d\u308b\u3068\u3001\u6b21\u7ae0\u4ee5\u964d\u306e\u539f\u56e0\u5019\u88dc\u304c\u4e00\u672c\u9053\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p> <p><!----><\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec02\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u30a8\u30e9\u30fc\u540d\u306b\u9a19\u3055\u308c\u306a\u3044\uff1aEADDRNOTAVAIL\u306f\u300cbind\/connect\u306e\u4f4f\u6240\u4e0d\u4e00\u81f4\u300d<\/h2> <p>\u307e\u305a\u4e8b\u5b9f\u3068\u3057\u3066\u3001EADDRNOTAVAIL \u306f\u300c\u30a2\u30c9\u30ec\u30b9\u304c\u4f7f\u3048\u306a\u3044\u300d\u3067\u3059\u304c\u3001<strong>\u3069\u306e\u30a2\u30c9\u30ec\u30b9\u304c\u30fb\u3069\u306e\u547c\u3073\u51fa\u3057\u3067<\/strong>\u4f7f\u3048\u306a\u3044\u306e\u304b\u3067\u610f\u5473\u304c\u5909\u308f\u308a\u307e\u3059\u3002Linux \u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u969c\u5bb3\u306f\u3001\u3053\u3053\u3092\u66d6\u6627\u306b\u3059\u308b\u3068\u8b70\u8ad6\u304c\u904e\u71b1\u3057\u304c\u3061\u3067\u3059\uff08\u300c\u30a2\u30d7\u30ea\u304c\u60aa\u3044\u300d\u300cNW\u304c\u60aa\u3044\u300d\u306e\u7a7a\u4e2d\u6226\uff09\u3002\u6e29\u5ea6\u3092\u4e0b\u3052\u308b\u305f\u3081\u306b\u3001syscall \u76ee\u7dda\u306b\u843d\u3068\u3057\u307e\u3059\u3002<\/p> <h3>bind() \u3067\u51fa\u308b EADDRNOTAVAIL\uff1a\u305d\u306eIP\u306f\u201c\u3053\u306e\u30db\u30b9\u30c8\u306e\u3082\u306e\u201d\u3067\u306f\u306a\u3044<\/h3> <p>\u5f85\u53d7\uff08listen\uff09\u306e\u524d\u6bb5\u3067\u3042\u308b bind() \u304c\u5931\u6557\u3059\u308b\u5834\u5408\u3001\u8981\u70b9\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002<strong>\u6307\u5b9a\u3057\u305f\u30a2\u30c9\u30ec\u30b9\u304c\u30ed\u30fc\u30ab\u30eb\u3067\u306f\u306a\u3044\u3001\u307e\u305f\u306f\u5b58\u5728\u3057\u306a\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u8981\u6c42\u3057\u305f<\/strong>\u3001\u3068\u3044\u3046\u7cfb\u7d71\u3067\u3059\u3002\u5178\u578b\u4f8b\u306f\u300c\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u56fa\u5b9aIP\u3092\u66f8\u3044\u305f\u304c\u3001\u305d\u306eIP\u304c\u4eca\u306eNIC\u306b\u8f09\u3063\u3066\u3044\u306a\u3044\u300d\u3067\u3059\u3002<\/p> <p>\u3053\u306e\u3068\u304d\u306e\u201c\u6700\u77ed\u306e\u78ba\u8a8d\u201d\u306f\u3001\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u898b\u308b\u3088\u308a\u5148\u306b <strong>ip addr<\/strong> \u3067\u5b9f\u5728\u3092\u78ba\u304b\u3081\u308b\u3053\u3068\u3067\u3059\u3002\u76ee\u8996\u3067\u300c\u305d\u306eIP\u304c\u3069\u306eIF\u306b\u4ed8\u3044\u3066\u3044\u308b\u304b\u300d\u304c\u5206\u304b\u308c\u3070\u3001\u30a2\u30d7\u30ea\u5074\u306e\u554f\u984c\u304b\u3001OS\u5074\u306e\u554f\u984c\u304b\u304c\u4e00\u6c17\u306b\u7d5e\u308c\u307e\u3059\u3002<\/p> <h3>connect() \u3067\u51fa\u308b EADDRNOTAVAIL\uff1a\u4e00\u6642\u30dd\u30fc\u30c8\u67af\u6e07\u3084\u9001\u4fe1\u5143\u6c7a\u5b9a\u306e\u5931\u6557<\/h3> <p>\u4e00\u65b9 connect() \u5074\u3067\u51fa\u308b EADDRNOTAVAIL \u306f\u3001\u8a71\u304c\u5c11\u3057\u5909\u308f\u308a\u307e\u3059\u3002Linux \u3067\u306f\u3001\u30bd\u30b1\u30c3\u30c8\u304c\u672abind\u306e\u307e\u307e connect() \u3057\u3088\u3046\u3068\u3057\u305f\u969b\u3001\u5185\u90e8\u7684\u306b\u4e00\u6642\u30dd\u30fc\u30c8\uff08ephemeral port\uff09\u3092\u5272\u308a\u5f53\u3066\u307e\u3059\u304c\u3001<strong>\u305d\u306e\u7bc4\u56f2\u306e\u30dd\u30fc\u30c8\u304c\u4f7f\u3044\u5c3d\u304f\u3055\u308c\u3066\u3044\u308b<\/strong>\u3068 EADDRNOTAVAIL \u306b\u306a\u308a\u5f97\u307e\u3059\u3002\u3064\u307e\u308a\u300c\u76f8\u624b\u306b\u5c4a\u304b\u306a\u3044\u300d\u3068\u3044\u3046\u3088\u308a\u3001<strong>\u81ea\u5206\u5074\u306e\u51fa\u767a\u70b9\uff08\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\uff09\u304c\u4f5c\u308c\u306a\u3044<\/strong>\u3068\u3044\u3046\u72b6\u614b\u3067\u3059\u3002<\/p> <p>\u3053\u306e\u30bf\u30a4\u30d7\u306f\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u5897\u30fb\u77ed\u547d\u63a5\u7d9a\u306e\u591a\u7528\u30fbTIME_WAIT \u306e\u5897\u52a0\u30fbNAT\u914d\u4e0b\u3067\u306e\u30dd\u30fc\u30c8\u6d88\u8cbb\u306a\u3069\u3001\u904b\u7528\u6761\u4ef6\u3067\u8d77\u304d\u307e\u3059\u3002\u300c\u6628\u65e5\u307e\u3067\u52d5\u3044\u3066\u3044\u305f\u300d\u306e\u5ef6\u9577\u7dda\u3067\u8d77\u304d\u3084\u3059\u3044\u306e\u3067\u3001\u52d8\u9055\u3044\u3057\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p> <hr> <h3>\u201c\u3069\u3063\u3061\u306eEADDRNOTAVAIL\u304b\u201d\u3092\u6c7a\u3081\u308b\u305f\u3081\u306e\u6700\u5c0f\u8868<\/h3> <table border=\"1\" cellspacing=\"0\" cellpadding=\"6\" style=\"border-collapse:collapse; width:100%;\"> <tr> <th style=\"background-color:#eeeeee; width:18%;\">\u8d77\u70b9<\/th> <th style=\"background-color:#eeeeee; width:42%;\">\u3042\u308a\u304c\u3061\u306a\u539f\u56e0<\/th> <th style=\"background-color:#eeeeee;\">\u307e\u305a\u898b\u308b\u89b3\u6e2c\u70b9<\/th> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">bind()<\/td> <td>\u6307\u5b9aIP\u304c\u30ed\u30fc\u30ab\u30eb\u306b\u7121\u3044\uff0fIF\u304c\u9055\u3046\uff0f\u30b3\u30f3\u30c6\u30ca\u540d\u524d\u7a7a\u9593\u306b\u7121\u3044<\/td> <td>ip -br addr\u3001nmcli dev status\u3001\u8a2d\u5b9a\u306elisten\u30a2\u30c9\u30ec\u30b9<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">connect()<\/td> <td>\u4e00\u6642\u30dd\u30fc\u30c8\u67af\u6e07\uff0fTIME_WAIT\u904e\u591a\uff0f\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u6c7a\u5b9a\u304c\u3067\u304d\u306a\u3044<\/td> <td>ss -s\u3001ss -tan state time-wait\u3001ip_local_port_range<\/td> <\/tr> <\/table> <p>\u3053\u3053\u307e\u3067\u306e\u6574\u7406\u304c\u3067\u304d\u308b\u3068\u3001\u6b21\u306b\u9032\u3080\u4f0f\u7dda\u304c\u63c3\u3044\u307e\u3059\u3002\u3064\u307e\u308a\u300c\u305d\u306eIP\u306f\u4eca\u3053\u306e\u30db\u30b9\u30c8\u306b\u8f09\u3063\u3066\u3044\u308b\u306e\u304b\uff1f\u300d\u305d\u3057\u3066\u300c\u8f09\u3063\u3066\u3044\u306a\u3044\u306e\u306b\u8f09\u3063\u3066\u3044\u308b\u524d\u63d0\u3067\u52d5\u304b\u3057\u3066\u3044\u306a\u3044\u304b\uff1f\u300d\u3067\u3059\u3002<\/p> <p><!----><\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec03\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u307e\u305a\u7591\u3046\u3079\u304d\u4f0f\u7dda\uff1a\u305d\u306eIP\u30a2\u30c9\u30ec\u30b9\u3001\u672c\u5f53\u306b\u4eca\u3053\u306e\u30db\u30b9\u30c8\u306b\u8f09\u3063\u3066\u308b\uff1f<\/h2> <p>\u7b2c1\u7ae0\u30fb\u7b2c2\u7ae0\u306e\u6d41\u308c\u3092\u8e0f\u307e\u3048\u308b\u3068\u3001\u6700\u521d\u306e\u5927\u304d\u306a\u5206\u5c90\u306f\u3053\u3053\u3067\u3059\u3002<strong>\u300c\u6307\u5b9a\u3057\u3066\u3044\u308bIP\u304c\u3001\u4eca\u3053\u306e\u5b9f\u884c\u74b0\u5883\u3067\u30ed\u30fc\u30ab\u30eb\u30a2\u30c9\u30ec\u30b9\u3068\u3057\u3066\u6210\u7acb\u3057\u3066\u3044\u308b\u304b\u300d<\/strong>\u3002\u3053\u308c\u304c\u5d29\u308c\u3066\u3044\u308b\u3068\u3001\u3069\u308c\u3060\u3051\u30a2\u30d7\u30ea\u3092\u76f4\u3057\u3066\u3082\u53ce\u675f\u3057\u307e\u305b\u3093\u3002\u9006\u306b\u3001\u3053\u3053\u304c\u6210\u7acb\u3057\u3066\u3044\u308b\u306a\u3089\u3001\u30a2\u30d7\u30ea\u5074\u306e bind \u6226\u7565\u3084 connect \u6642\u306e\u30dd\u30fc\u30c8\u67af\u6e07\u5074\u306b\u7126\u70b9\u3092\u79fb\u305b\u307e\u3059\u3002<\/p> <h3>\u78ba\u8a8d\u306f\u201c\u6587\u5b57\u5217\u691c\u7d22\u201d\u3067\u306f\u306a\u304f\u201cOS\u306e\u4e8b\u5b9f\u201d\u304b\u3089<\/h3> <p>\u3088\u304f\u3042\u308b\u5931\u6557\u306f\u300c\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u305d\u306eIP\u304c\u66f8\u3044\u3066\u3042\u308b\u304b\u3089\u3001OS\u306b\u3082\u3042\u308b\u306f\u305a\u300d\u3068\u601d\u3044\u8fbc\u3080\u3053\u3068\u3067\u3059\u3002\u73fe\u5b9f\u306f\u3001IP\u306f\u6d88\u3048\u307e\u3059\u3002DHCP\u66f4\u65b0\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d\u306e\u5909\u5316\u3001NetworkManager\u306e\u63a5\u7d9a\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u5dee\u3057\u66ff\u3048\u3001\u30af\u30e9\u30b9\u30bf\u5207\u66ff\u3001Kubernetes\u306e\u518d\u30b9\u30b1\u30b8\u30e5\u30fc\u30ea\u30f3\u30b0\u3002\u30a2\u30c9\u30ec\u30b9\u306f\u904b\u7528\u3067\u63fa\u308c\u307e\u3059\u3002<\/p> <p>\u306a\u306e\u3067\u3001\u307e\u305a\u306f OS \u304c\u6301\u3064\u4e8b\u5b9f\u3092\u77ed\u3044\u30b3\u30de\u30f3\u30c9\u3067\u898b\u307e\u3059\u3002<\/p> <pre><code># \u3069\u306eIF\u306b\u3069\u306eIP\u304c\u4ed8\u3044\u3066\u3044\u308b\u304b\uff08\u6700\u77ed\uff09 ip -br addr # NetworkManager\u914d\u4e0b\u306e\u201c\u63a5\u7d9a\u201d\u72b6\u614b\uff08RHEL\u7cfb\u3067\u7279\u306b\u91cd\u8981\uff09 nmcli -t dev status nmcli -t con show --active # \u305d\u306e\u30b5\u30fc\u30d3\u30b9\u304c\u3069\u306e\u30a2\u30c9\u30ec\u30b9\u3067\u5f85\u3061\u53d7\u3051\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u304b ss -lntp | head<\/code><\/pre> <hr> <h3>\u30b3\u30f3\u30c6\u30ca\/Kubernetes\u3067\u7279\u306b\u591a\u3044\uff1a\u30db\u30b9\u30c8\u306eIP\u3092\u30b3\u30f3\u30c6\u30ca\u3067bind\u3057\u3066\u3044\u308b<\/h3> <p>\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306f\u300c\u30db\u30b9\u30c8\u306b\u5b58\u5728\u3059\u308bIP\u300d\u3068\u300c\u30b3\u30f3\u30c6\u30ca\u5185\uff08Pod\u5185\uff09\u3067\u898b\u3048\u308bIP\u300d\u306f\u4e00\u81f4\u3057\u307e\u305b\u3093\u3002\u30a2\u30d7\u30ea\u304c listen \u3059\u308b\u30a2\u30c9\u30ec\u30b9\u3092\u56fa\u5b9a\u3057\u3066\u3044\u308b\u3068\u3001\u30db\u30b9\u30c8\u3067\u306f\u6210\u7acb\u3057\u3066\u3082\u30b3\u30f3\u30c6\u30ca\u3067\u306f\u975e\u30ed\u30fc\u30ab\u30eb\u306b\u306a\u308a\u3001EADDRNOTAVAIL \u306b\u306a\u308a\u307e\u3059\u3002<\/p> <p>\u3053\u306e\u5834\u5408\u306e\u5bfe\u7b56\u306f\u5927\u304d\u304f\u4e8c\u3064\u3067\u3059\u3002<\/p> <ul> <li>\u30a2\u30d7\u30ea\u306f\u57fa\u672c\u7684\u306b 0.0.0.0\uff08IPv6\u306a\u3089 ::\uff09\u3067\u5f85\u53d7\u3057\u3001\u5230\u9054\u5236\u5fa1\u306f Service \/ Ingress \/ FW \u3067\u884c\u3046<\/li> <li>\u3069\u3046\u3057\u3066\u3082\u7279\u5b9aIP\u304c\u5fc5\u8981\u306a\u3089\u3001hostNetwork \u306a\u3069\u201c\u305d\u306eIP\u304c\u5b58\u5728\u3059\u308b\u540d\u524d\u7a7a\u9593\u201d\u3067\u52d5\u304b\u3059\u8a2d\u8a08\u306b\u5bc4\u305b\u308b<\/li> <\/ul> <p>\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u306f\u3001\u5834\u5f53\u305f\u308a\u7684\u306b\u300c\u3068\u308a\u3042\u3048\u305ahostNetwork\u300d\u306b\u9003\u3052\u308b\u306e\u3067\u306f\u306a\u304f\u3001<strong>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5883\u754c\u3068\u904b\u7528\u8cac\u4efb\u304c\u3069\u3053\u306b\u79fb\u308b\u304b<\/strong>\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067\u9078\u3076\u3053\u3068\u3067\u3059\u3002\u6a29\u9650\u3068\u8cac\u4efb\u304c\u5897\u3048\u308b\u5909\u66f4\u307b\u3069\u3001\u5f8c\u3067\u623b\u3057\u3065\u3089\u3044\u304b\u3089\u3067\u3059\u3002<\/p> <hr> <h3>VRRP\/VIP\u3084\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\uff1a\u975e\u30ed\u30fc\u30ab\u30ebbind\u304c\u201c\u5fc5\u8981\u306a\u8a2d\u8a08\u201d\u3082\u3042\u308b<\/h3> <p>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u3084HA\u69cb\u6210\uff08\u4f8b\uff1aKeepalived + HAProxy\uff09\u306e\u3088\u3046\u306b\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3067 VIP\uff08\u4eee\u60f3IP\uff09\u304c\u79fb\u52d5\u3059\u308b\u8a2d\u8a08\u3067\u306f\u3001\u300cVIP\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u77ac\u9593\u3067\u3082\u8d77\u52d5\u3057\u3066\u5f85\u3063\u3066\u3044\u3066\u307b\u3057\u3044\u300d\u3068\u3044\u3046\u8981\u4ef6\u304c\u51fa\u307e\u3059\u3002\u3053\u306e\u3068\u304d Linux \u306e <strong>net.ipv4.ip_nonlocal_bind<\/strong> \u3092\u6709\u52b9\u5316\u3057\u3066\u3001\u975e\u30ed\u30fc\u30ab\u30eb\u30a2\u30c9\u30ec\u30b9\u3078\u306e bind \u3092\u8a31\u53ef\u3059\u308b\u8a2d\u8a08\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u305f\u3060\u3057\u3001\u3053\u308c\u306f\u201c\u9b54\u6cd5\u306e\u4fee\u6b63\u201d\u3067\u306f\u306a\u304f\u3001\u8981\u4ef6\u304c\u3042\u308b\u3068\u304d\u306b\u3060\u3051\u9078\u3076\u3079\u304d\u8a2d\u5b9a\u3067\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u975e\u30ed\u30fc\u30ab\u30ebbind \u3092\u8a31\u3059\u3068\u3001\u30a2\u30d7\u30ea\u304c\u300c\u672c\u6765\u306f\u5b58\u5728\u3057\u306a\u3044\u306f\u305a\u306e\u30a2\u30c9\u30ec\u30b9\u300d\u306b\u3082 bind \u3067\u304d\u3066\u3057\u307e\u3044\u3001\u8a2d\u8a08\u30df\u30b9\u304c\u898b\u3048\u306b\u304f\u304f\u306a\u308b\u9762\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u77ed\u671f\u7684\u306b\u306f\u6c88\u9759\u5316\u3057\u3066\u3082\u3001\u9577\u671f\u7684\u306b\u306f\u904b\u7528\u306e\u4e0d\u78ba\u5b9f\u6027\u304c\u5897\u3048\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u3053\u3053\u306f\u5951\u7d04\uff08\u8981\u4ef6\uff09\u3068\u3057\u3066\u6271\u3046\u306e\u304c\u5b89\u5168\u3067\u3059\u3002<\/p> <p>\u6b21\u7ae0\u3067\u306f\u3001\u3053\u306e\u201c\u30a2\u30c9\u30ec\u30b9\u304c\u6d88\u3048\u308b\u201d\u4ee3\u8868\u683c\u3067\u3042\u308b DHCP\/VRRP\/\u30af\u30e9\u30b9\u30bf\u5207\u66ff\u3067\u3001\u3069\u306e\u77ac\u9593\u306b\u4f55\u304c\u8d77\u304d\u308b\u306e\u304b\u3092\u3001\u904b\u7528\u76ee\u7dda\u3067\u6574\u7406\u3057\u307e\u3059\u3002<\/p> <p><!----><\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec04\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">DHCP\/VRRP\/\u30af\u30e9\u30b9\u30bf\u5207\u66ff\u3067\u201c\u6307\u5b9a\u30a2\u30c9\u30ec\u30b9\u201d\u304c\u6d88\u3048\u308b\u77ac\u9593<\/h2> <p>\u3053\u3053\u304b\u3089\u5148\u306f\u300c\u8a2d\u5b9a\u306f\u6b63\u3057\u3044\u306f\u305a\u306a\u306e\u306b\u3001\u3042\u308b\u77ac\u9593\u3060\u3051\u30a2\u30c9\u30ec\u30b9\u304c\u6210\u7acb\u3057\u306a\u3044\u300d\u7cfb\u306e\u8a71\u3067\u3059\u3002EADDRNOTAVAIL \u3092\u201c\u904b\u7528\u306e\u63fa\u308c\u201d\u3068\u3057\u3066\u7406\u89e3\u3059\u308b\u3068\u3001\u5bfe\u7b56\u304c\u300c\u5834\u5f53\u305f\u308a\u306e\u518d\u8d77\u52d5\u300d\u304b\u3089\u300c\u518d\u767a\u3057\u306a\u3044\u69cb\u6210\u300d\u3078\u5bc4\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p> <h3>DHCP\u66f4\u65b0\u30fb\u30ea\u30f3\u30af\u30c0\u30a6\u30f3\u30fb\u518d\u63a5\u7d9a\uff1aIP\u304c\u4e00\u6642\u7684\u306b\u5916\u308c\u308b\u306e\u306f\u73cd\u3057\u304f\u306a\u3044<\/h3> <p>RHEL\u7cfb\u3067\u306f NetworkManager \u304c\u7ba1\u7406\u3057\u3066\u3044\u308b\u69cb\u6210\u304c\u591a\u304f\u3001\u30ea\u30f3\u30af\u306e\u77ac\u65ad\u3084DHCP\u30ea\u30fc\u30b9\u66f4\u65b0\u3001\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u5207\u66ff\u3067\u3001<strong>\u77ed\u6642\u9593\u3060\u3051IP\u304c\u5916\u308c\u308b<\/strong>\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u30a2\u30d7\u30ea\u304c\u300c\u7279\u5b9aIP\u3078\u306ebind\u300d\u3092\u884c\u3046\u3068\u3001bind() \u304c EADDRNOTAVAIL \u306b\u306a\u308a\u5f97\u307e\u3059\u3002<\/p> <p>\u7279\u306b\u201c\u6628\u65e5\u307e\u3067\u52d5\u3044\u3066\u3044\u305f\u201d\u306e\u306b\u8d77\u304d\u308b\u30b1\u30fc\u30b9\u306f\u3001OS\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3001NIC\u540d\u306e\u5909\u5316\u3001\u63a5\u7d9a\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u5dee\u3057\u66ff\u3048\u3001\u30b9\u30a4\u30c3\u30c1\u5074\u306e\u518d\u5b66\u7fd2\u306a\u3069\u3001\u30a2\u30d7\u30ea\u5916\u306e\u5909\u66f4\u304c\u30c8\u30ea\u30ac\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u5927\u5207\u306a\u306e\u306f\u3001\u539f\u56e0\u7a76\u660e\u3092\u6025\u3050\u524d\u306b<strong>\u89b3\u6e2c\u70b9\u3092\u78ba\u4fdd\u3057\u3066\u304b\u3089\u53ce\u675f\u3055\u305b\u308b<\/strong>\u3053\u3068\u3067\u3059\uff08\u30ed\u30b0\u304c\u6d41\u308c\u7d9a\u3051\u308b\u3068\u809d\u5fc3\u306a\u77ac\u9593\u304c\u57cb\u3082\u308c\u307e\u3059\uff09\u3002<\/p> <h3>VRRP\/VIP\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\uff1aVIP\u3092\u201c\u6301\u3063\u3066\u3044\u306a\u3044\u5074\u201d\u3067bind\u3057\u3066\u3044\u306a\u3044\u304b<\/h3> <p>Keepalived\u7b49\u3067VIP\u304c\u79fb\u52d5\u3059\u308b\u69cb\u6210\u3067\u306f\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u306e\u76f4\u5f8c\u306b\u300cVIP\u304c\u4ed8\u304f\u524d\u300d\u307e\u305f\u306f\u300c\u4ed8\u3051\u66ff\u3048\u306e\u9014\u4e2d\u300d\u3068\u3044\u3046\u72b6\u614b\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u30a2\u30d7\u30ea\u304cVIP\u3092\u56fa\u5b9a\u3067listen\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001bind() \u306f\u5931\u6557\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u8a2d\u8a08\u4e0a\u306e\u885d\u7a81\u3067\u3059\u3002<\/p> <p>\u3053\u306e\u885d\u7a81\u3092\u907f\u3051\u308b\u9078\u629e\u80a2\u306f\u5927\u304d\u304f2\u7cfb\u7d71\u3067\u3059\u3002<\/p> <ul> <li><strong>\u30a2\u30d7\u30ea\u3092 0.0.0.0\uff08\u5168IF\uff09\u3067\u5f85\u53d7<\/strong>\u3057\u3001\u5230\u9054\u5236\u5fa1\u306fFW\/LB\/iptables\/nftables\u5074\u3067\u62c5\u4fdd\u3059\u308b<\/li> <li>\u8981\u4ef6\u304c\u3042\u308b\u5834\u5408\u306e\u307f\u3001<strong>\u975e\u30ed\u30fc\u30ab\u30ebbind\uff08ip_nonlocal_bind\uff09<\/strong>\u3092\u4f7f\u3044\u300cVIP\u304c\u6765\u308b\u524d\u3067\u3082\u8d77\u52d5\u300d\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b<\/li> <\/ul> <p>\u975e\u30ed\u30fc\u30ab\u30ebbind\u306f\u3001HA\u69cb\u6210\u3067\u5408\u7406\u6027\u304c\u3042\u308b\u4e00\u65b9\u3001\u8aa4\u8a2d\u5b9a\u3067\u3082\u201c\u8d77\u52d5\u3060\u3051\u306f\u3067\u304d\u3066\u3057\u307e\u3046\u201d\u9762\u304c\u3042\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u77ed\u671f\u7684\u306b\u306f\u6291\u3048\u8fbc\u307f\u306b\u306a\u3063\u3066\u3082\u3001\u9577\u671f\u7684\u306b\u300c\u672c\u5f53\u306bVIP\u304c\u6765\u3066\u3044\u308b\u306e\u304b\uff1f\u300d\u3068\u3044\u3046\u76e3\u8996\u304c\u5fc5\u9808\u306b\u306a\u308a\u307e\u3059\u3002\u63a1\u7528\u3059\u308b\u306a\u3089\u3001\u904b\u7528\u306e\u5951\u7d04\uff08\u76e3\u8996\u30fb\u691c\u8a3c\u30fb\u8a2d\u8a08\u66f8\uff09\u307e\u3067\u542b\u3081\u3066\u6c7a\u3081\u308b\u306e\u304c\u5b89\u5168\u3067\u3059\u3002<\/p> <hr> <h3>systemd\u306e\u8d77\u52d5\u9806\u5e8f\uff1anetwork.target \u3068 network-online.target \u306f\u5225\u7269<\/h3> <p>\u30d6\u30fc\u30c8\u76f4\u5f8c\u306eEADDRNOTAVAIL\u306f\u3001\u5358\u7d14\u306b\u300c\u30a2\u30d7\u30ea\u304c\u65e9\u8d77\u304d\u3057\u3059\u304e\u305f\u300d\u3053\u3068\u3067\u3082\u8d77\u304d\u307e\u3059\u3002systemd \u306e <code>After=network.target<\/code> \u306f\u201c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u30bf\u30c3\u30af\u304c\u8d77\u52d5\u3057\u305f\u201d\u7a0b\u5ea6\u3067\u3001<strong>IP\u53d6\u5f97\u304c\u5b8c\u4e86\u3057\u305f\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u305b\u3093<\/strong>\u3002IP\uff08DHCP\uff09\u3092\u5f85\u3061\u305f\u3044\u306a\u3089 <code>network-online.target<\/code> \u3092\u4f7f\u3044\u3001NetworkManager\u74b0\u5883\u3067\u306f <code>nm-online<\/code> \u306e\u6709\u52b9\u5316\u306a\u3069\u3082\u5408\u308f\u305b\u3066\u691c\u8a0e\u3057\u307e\u3059\u3002<\/p> <p>\u3055\u3089\u306b\u5805\u3044\u904b\u7528\u3068\u3057\u3066\u3001\u30b5\u30fc\u30d3\u30b9\u8d77\u52d5\u524d\u306b\u300c\u5fc5\u8981\u306aIP\u304c\u5b58\u5728\u3059\u308b\u307e\u3067\u5f85\u3064\u300d\u30c1\u30a7\u30c3\u30af\u3092 <code>ExecStartPre<\/code> \u306b\u5165\u308c\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u201c\u3084\u307f\u304f\u3082\u306a\u518d\u8d77\u52d5\u201d\u3088\u308a\u3001\u89b3\u6e2c\u3092\u4fdd\u3063\u305f\u307e\u307e\u5b89\u5168\u306b\u53ce\u675f\u3055\u305b\u3084\u3059\u3044\u3067\u3059\u3002<\/p> <pre><code># \u4f8b\uff1a\u6307\u5b9aIP\u304c\u4ed8\u4e0e\u3055\u308c\u308b\u307e\u3067\u6700\u592730\u79d2\u5f85\u3064\uff08\u6982\u5ff5\u4f8b\uff09 # \u5b9f\u74b0\u5883\u3067\u306f\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u5024\u30fb\u5bfe\u8c61IF\u30fb\u30ed\u30b0\u51fa\u529b\u5148\u3092\u8981\u4ef6\u306b\u5408\u308f\u305b\u308b for i in $(seq 1 30); do ip -br addr | grep -q \" 192.0.2.10\/\" &amp;&amp; exit 0 sleep 1 done exit 1<\/code><\/pre> <table border=\"1\" cellspacing=\"0\" cellpadding=\"6\" style=\"border-collapse:collapse; width:100%;\"> <tr> <th style=\"background-color:#eeeeee; width:32%;\">\u8d77\u304d\u3066\u3044\u308b\u3053\u3068<\/th> <th style=\"background-color:#eeeeee;\">\u201c\u5b89\u5168\u306b\u201d\u5bc4\u305b\u308b\u5bfe\u7b56\u306e\u65b9\u5411<\/th> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">DHCP\/\u518d\u63a5\u7d9a\u3067IP\u304c\u4e00\u6642\u7684\u306b\u5916\u308c\u308b<\/td> <td>\u8d77\u52d5\u9806\u5e8f\u306e\u898b\u76f4\u3057\uff08network-online\uff09\u3001\u5fc5\u8981\u306a\u3089\u8d77\u52d5\u524d\u30c1\u30a7\u30c3\u30af\u3001\u30a2\u30d7\u30ea\u306f\u53ef\u80fd\u306a\u30890.0.0.0\u5f85\u53d7<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">VIP\u79fb\u52d5\u3067\u300cVIP\u672a\u4ed8\u4e0e\u300d\u306e\u77ac\u9593\u304c\u3042\u308b<\/td> <td>0.0.0.0\u5f85\u53d7\uff0b\u5230\u9054\u5236\u5fa1\uff0f\u8981\u4ef6\u304c\u3042\u308b\u5834\u5408\u306e\u307fip_nonlocal_bind\uff0b\u76e3\u8996\u3092\u30bb\u30c3\u30c8\u3067\u8a2d\u8a08<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u5f8c\u306b\u758e\u901a\u304c\u4e0d\u5b89\u5b9a<\/td> <td>GARP\u3084\u8fd1\u508d\u6a5f\u5668\u306eARP\u66f4\u65b0\u3001LB\u306e\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u8a2d\u8a08\u3092\u898b\u76f4\u3057\uff08\u201c\u8d77\u52d5\u3057\u305f\u3060\u3051\u201d\u3092\u6210\u529f\u306b\u3057\u306a\u3044\uff09<\/td> <\/tr> <\/table> <p>\u6b21\u7ae0\u3067\u306f\u3001\u540c\u3058\u201c\u30a2\u30c9\u30ec\u30b9\u306e\u524d\u63d0\u5d29\u308c\u201d\u3067\u3082\u3001\u30b3\u30f3\u30c6\u30ca\/Kubernetes\u3067\u306a\u305c\u983b\u767a\u3059\u308b\u306e\u304b\u3092\u3001\u540d\u524d\u7a7a\u9593\u306e\u89b3\u70b9\u3067\u6574\u7406\u3057\u307e\u3059\u3002<\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec05\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u30b3\u30f3\u30c6\u30ca\u3068Kubernetes\uff1aPod\u306e\u4e16\u754c\u304b\u3089\u898b\u305f\u300c\u5229\u7528\u53ef\u80fd\u306a\u30a2\u30c9\u30ec\u30b9\u300d<\/h2> <p>\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067EADDRNOTAVAIL\u304c\u5897\u3048\u308b\u7406\u7531\u306f\u3001\u7279\u6b8a\u306a\u30d0\u30b0\u3067\u306f\u306a\u304f\u3001\u524d\u63d0\u304c\u660e\u78ba\u306b\u9055\u3046\u304b\u3089\u3067\u3059\u3002\u30db\u30b9\u30c8OS\u306e\u8996\u70b9\u3067\u306f\u201c\u305d\u306eIP\u306f\u3042\u308b\u201d\u3002\u3067\u3082\u3001Pod\/\u30b3\u30f3\u30c6\u30ca\u306e\u8996\u70b9\u3067\u306f\u201c\u305d\u306eIP\u306f\u7121\u3044\u201d\u3002\u3053\u306e\u30ba\u30ec\u3067 bind() \u304c\u5931\u6557\u3057\u307e\u3059\u3002<\/p> <h3>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u540d\u524d\u7a7a\u9593\uff1aIP\u306e\u201c\u6240\u6709\u8005\u201d\u304c\u9055\u3046<\/h3> <p>Linux\u3067\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u540d\u524d\u7a7a\u9593\u306b\u5c5e\u3057\u307e\u3059\u3002\u30b3\u30f3\u30c6\u30ca\u306f\u901a\u5e38\u3001\u30db\u30b9\u30c8\u3068\u306f\u5225\u306e\u540d\u524d\u7a7a\u9593\u3092\u6301\u3061\u3001\u305d\u3053\u3067\u898b\u3048\u308bIF\u3068IP\u306fPod\/\u30b3\u30f3\u30c6\u30ca\u306e\u3082\u306e\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30a2\u30d7\u30ea\u8a2d\u5b9a\u3067\u300c\u30db\u30b9\u30c8\u306e\u7279\u5b9aIP\u300d\u3092listen\u5148\u306b\u6307\u5b9a\u3057\u3066\u3044\u308b\u3068\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u3067\u306f\u975e\u30ed\u30fc\u30ab\u30eb\u306b\u306a\u308a\u3001EADDRNOTAVAIL\u306b\u306a\u308a\u307e\u3059\u3002<\/p> <p>\u3053\u306e\u3068\u304d\u3001\u6700\u521d\u306b\u78ba\u8a8d\u3059\u3079\u304d\u306f\u300c\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u3069\u306e\u540d\u524d\u7a7a\u9593\u3067\u52d5\u3044\u3066\u3044\u308b\u304b\u300d\u3068\u300c\u305d\u306e\u540d\u524d\u7a7a\u9593\u306bIP\u304c\u3042\u308b\u304b\u300d\u3067\u3059\u3002Kubernetes\u306a\u3089\u3001Pod\u306b\u5165\u3063\u3066\u6b21\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p> <pre><code># Pod\/\u30b3\u30f3\u30c6\u30ca\u306e\u4e2d\u3067 ip -br addr ss -lntp<\/code><\/pre> <h3>\u57fa\u672c\u306f\u201c\u5168IF\u5f85\u53d7\u201d\uff0b\u201c\u5916\u5074\u3067\u5236\u5fa1\u201d\u304c\u4e8b\u6545\u308a\u306b\u304f\u3044<\/h3> <p>\u591a\u304f\u306eWeb\/\u30a2\u30d7\u30ea\u30b5\u30fc\u30d0\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u3067\u306f <strong>0.0.0.0\uff08\u5168IF\uff09<\/strong> \u3067\u5f85\u53d7\u3057\u3001\u516c\u958b\/\u5236\u9650\u306f Service\/Ingress\u3001NetworkPolicy\u3001FW\u3001LB\u5074\u3067\u5236\u5fa1\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u3053\u308c\u306a\u3089\u300cPod IP\u304c\u5909\u308f\u308b\u300d\u300c\u30ce\u30fc\u30c9\u304c\u5909\u308f\u308b\u300d\u3068\u3044\u3063\u305fKubernetes\u306e\u524d\u63d0\uff08\u53ef\u5909\uff09\u306b\u8ffd\u968f\u3067\u304d\u307e\u3059\u3002<\/p> <p>\u9006\u306b\u3001\u300c\u7279\u5b9aIP\u3092\u56fa\u5b9a\u3067bind\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u8981\u4ef6\u304c\u3042\u308b\u306a\u3089\u3001\u305d\u308c\u306fKubernetes\u306e\u201c\u79fb\u52d5\u201d\u3068\u885d\u7a81\u3057\u3084\u3059\u3044\u306e\u3067\u3001\u8a2d\u8a08\u306e\u6bb5\u968e\u3067\u6574\u7406\u304c\u5fc5\u8981\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\u8cac\u52d9\u304c\u5909\u308f\u308a\u307e\u3059\u3002<\/p> <table border=\"1\" cellspacing=\"0\" cellpadding=\"6\" style=\"border-collapse:collapse; width:100%;\"> <tr> <th style=\"background-color:#eeeeee; width:34%;\">\u8981\u4ef6<\/th> <th style=\"background-color:#eeeeee;\">\u8a2d\u8a08\u306e\u65b9\u5411\uff08\u4f8b\uff09<\/th> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">\u7279\u5b9aIP\u3067listen\u3057\u305f\u3044\uff08IP\u304c\u610f\u5473\u3092\u6301\u3064\uff09<\/td> <td>hostNetwork\u7b49\u3067\u30db\u30b9\u30c8\u5074IP\u3092\u76f4\u63a5\u6271\u3046\uff0fNode\u56fa\u5b9a\u306e\u5236\u7d04\u304c\u5897\u3048\u308b\u70b9\u3092\u8a31\u5bb9\u3067\u304d\u308b\u304b\u691c\u8a0e<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">Pod\u304c\u79fb\u52d5\u3057\u3066\u3082\u52d5\u3051\u3070\u3088\u3044<\/td> <td>0.0.0.0\u5f85\u53d7\uff0bService\/Ingress\u3067\u5230\u9054\u6027\u3092\u62c5\u4fdd\uff08\u30a2\u30d7\u30ea\u306fIP\u56fa\u5b9a\u3092\u6368\u3066\u308b\uff09<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">\u5230\u9054\u5236\u5fa1\u3092\u53b3\u5bc6\u306b\u3057\u305f\u3044<\/td> <td>NetworkPolicy\/\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b0\u30eb\u30fc\u30d7\/LB\u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u3067\u5236\u5fa1\uff08\u30a2\u30d7\u30ea\u3067\u7e1b\u308a\u3059\u304e\u306a\u3044\uff09<\/td> <\/tr> <\/table> <hr> <h3>connect\u5074\u306eEADDRNOTAVAIL\uff1a\u77ed\u547d\u63a5\u7d9a\u3068NAT\u3067\u201c\u81ea\u5206\u306e\u51fa\u767a\u70b9\u201d\u304c\u5c3d\u304d\u308b<\/h3> <p>\u30b3\u30f3\u30c6\u30ca\u3084\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3001\u77ed\u547d\u306aHTTP\u63a5\u7d9a\u304c\u5897\u3048\u304c\u3061\u3067\u3059\u3002keep-alive\u4e0d\u4f7f\u7528\u3001\u904e\u5270\u306a\u518d\u63a5\u7d9a\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u8a2d\u5b9a\u306e\u4e0d\u6574\u5408\u304c\u3042\u308b\u3068\u3001TIME_WAIT\u304c\u5897\u3048\u3001\u4e00\u6642\u30dd\u30fc\u30c8\u6d88\u8cbb\u304c\u9032\u307f\u307e\u3059\u3002\u3059\u308b\u3068 connect() \u306e\u6bb5\u968e\u3067\u300c\u30ed\u30fc\u30ab\u30eb\u306b\u5272\u308a\u5f53\u3066\u308b\u30dd\u30fc\u30c8\u304c\u7121\u3044\u300d\u72b6\u614b\u306b\u5bc4\u308a\u3001EADDRNOTAVAIL \u304c\u51fa\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u3053\u306e\u30bf\u30a4\u30d7\u306f\u3001\u30a2\u30d7\u30ea\u4fee\u6b63\u3068\u3044\u3046\u3088\u308a<strong>\u63a5\u7d9a\u306e\u4f5c\u6cd5\uff08\u518d\u5229\u7528\u3001\u30d7\u30fc\u30eb\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3001\u30ea\u30c8\u30e9\u30a4\uff09<\/strong>\u3067\u5927\u304d\u304f\u5909\u308f\u308a\u307e\u3059\u3002\u6b21\u7ae0\u4ee5\u964d\u3067\u89e6\u308c\u308b\u300cIPv6\/IPv4\u306e\u89e3\u6c7a\u7d50\u679c\u300d\u3084\u300c\u7d4c\u8def\u5236\u5fa1\u300d\u3082\u7d61\u3080\u306e\u3067\u3001\u3053\u3053\u3067\u4e71\u66b4\u306b\u30ea\u30c8\u30e9\u30a4\u3092\u5897\u3084\u3059\u306e\u306f\u5371\u967a\u3067\u3059\u3002\u307e\u305a\u306f\u73fe\u72b6\u306e\u30bd\u30b1\u30c3\u30c8\u7d71\u8a08\u3092\u53d6\u308a\u3001\u5897\u3048\u65b9\u3092\u898b\u3066\u304b\u3089\u624b\u3092\u6253\u3064\u306e\u304c\u3001\u7d50\u679c\u3068\u3057\u3066\u88ab\u5bb3\u6700\u5c0f\u5316\u306b\u306a\u308a\u307e\u3059\u3002<\/p> <pre><code># \u63a5\u7d9a\u72b6\u614b\u306e\u6982\u8981\uff08TIME_WAIT\u306a\u3069\uff09 ss -s # TIME_WAIT\u304c\u591a\u3044\u304b ss -tan state time-wait | wc -l<\/code><\/pre> <p>\u6b21\u7ae0\u3067\u306f\u3001\u898b\u843d\u3068\u3055\u308c\u304c\u3061\u306aIPv6\/IPv4\u306e\u30df\u30b9\u30de\u30c3\u30c1\u304c\u3001EADDRNOTAVAIL\u306e\u5f15\u304d\u91d1\u306b\u306a\u308b\u30b1\u30fc\u30b9\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec06\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">IPv6\/IPv4\u30df\u30b9\u30de\u30c3\u30c1\uff1agetaddrinfo\u306e\u7d50\u679c\u3068sysctl\u8a2d\u5b9a\u306e\u30ba\u30ec<\/h2> <p>\u300c\u30a2\u30d7\u30ea\u306fIPv4\u3067\u52d5\u304b\u3057\u3066\u3044\u308b\u3064\u3082\u308a\u300d\u3067\u3082\u3001\u5b9f\u969b\u306b\u306fDNS\u89e3\u6c7a\u7d50\u679c\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u6319\u52d5\u3067IPv6\u3092\u5148\u306b\u4f7f\u304a\u3046\u3068\u3057\u3066\u3001EADDRNOTAVAIL\u306b\u906d\u9047\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306bRHEL\u7cfb\u306e\u74b0\u5883\u5dee\uff08sysctl\u3001\u30ab\u30fc\u30cd\u30eb\u8a2d\u5b9a\u3001NW\u6a5f\u5668\u306eIPv6\u5bfe\u5fdc\u72b6\u6cc1\uff09\u304c\u3042\u308b\u3068\u3001\u518d\u73fe\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002<\/p> <h3>\u3088\u304f\u3042\u308b\u30ba\u30ec1\uff1aIPv6\u3092\u7121\u52b9\u5316\u3057\u3066\u3044\u308b\u306e\u306b\u3001\u30a2\u30d7\u30ea\u304cIPv6 bind \u3057\u3088\u3046\u3068\u3059\u308b<\/h3> <p>IPv6\u3092 <code>net.ipv6.conf.all.disable_ipv6=1<\/code> \u306a\u3069\u3067\u7121\u52b9\u5316\u3057\u3066\u3044\u308b\u74b0\u5883\u3067\u3001\u30a2\u30d7\u30ea\u304c <code>::<\/code> \u3084\u7279\u5b9a\u306eIPv6\u30a2\u30c9\u30ec\u30b9\u306bbind\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u5f53\u7136\u306a\u304c\u3089\u30a2\u30c9\u30ec\u30b9\u304c\u5b58\u5728\u305b\u305a\u3001EADDRNOTAVAIL\u306b\u306a\u308a\u5f97\u307e\u3059\u3002\u9006\u306b\u3001IPv6\u304c\u6709\u52b9\u3067\u3082\u3001\u5bfe\u8c61IF\u306bIPv6\u304c\u4ed8\u4e0e\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u540c\u3058\u3067\u3059\u3002<\/p> <pre><code># IPv6\u304c\u6709\u52b9\u304b\uff08\u4ee3\u8868\u4f8b\uff09 sysctl net.ipv6.conf.all.disable_ipv6 sysctl net.ipv6.conf.default.disable_ipv6 # IPv6\u30a2\u30c9\u30ec\u30b9\u304c\u4ed8\u3044\u3066\u3044\u308b\u304b\uff08\u5b58\u5728\u78ba\u8a8d\uff09 cat \/proc\/net\/if_inet6 2&gt;\/dev\/null || true<\/code><\/pre> <h3>\u3088\u304f\u3042\u308b\u30ba\u30ec2\uff1aDNS\u304cAAAA\u3092\u8fd4\u3057\u3001\u30a2\u30d7\u30ea\u304cIPv6\u3092\u512a\u5148\u3057\u3066\u5931\u6557\u3059\u308b<\/h3> <p>\u540d\u524d\u89e3\u6c7a\uff08getaddrinfo\uff09\u304cAAAA\uff08IPv6\uff09\u3092\u8fd4\u3059\u3068\u3001\u30a2\u30d7\u30ea\u3084\u30e9\u30f3\u30bf\u30a4\u30e0\u304c\u5148\u306bIPv6\u3078connect\u3092\u8a66\u307f\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7d4c\u8def\u304cIPv6\u3067\u6210\u7acb\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3001ENETUNREACH\u7b49\u306b\u306a\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u304c\u3001<strong>\u30ed\u30fc\u30ab\u30eb\u5074\u306e\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u9078\u629e\u304c\u6210\u7acb\u3057\u306a\u3044<\/strong>\u72b6\u6cc1\u3067\u306f\u3001EADDRNOTAVAIL\u304c\u898b\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u3053\u3053\u3067\u306e\u201c\u5b89\u5168\u306a\u8003\u3048\u65b9\u201d\u306f\u3001IPv6\u3092\u4f7f\u3046\u306a\u3089\u4f7f\u3046\u3067\u3001<strong>OS\u8a2d\u5b9a\u30fbDNS\u30fbNW\u6a5f\u5668\u30fb\u76e3\u8996<\/strong>\u307e\u3067\u63c3\u3048\u308b\u3053\u3068\u3067\u3059\u3002\u4e2d\u9014\u534a\u7aef\u306b\u3059\u308b\u3068\u300c\u74b0\u5883\u306b\u3088\u3063\u3066\u6210\u529f\/\u5931\u6557\u304c\u63fa\u308c\u308b\u300d\u72b6\u614b\u306b\u306a\u308a\u3001\u73fe\u5834\u306e\u8aac\u660e\u30b3\u30b9\u30c8\u304c\u8df3\u306d\u4e0a\u304c\u308a\u307e\u3059\u3002<\/p> <hr> <h3>\u5bfe\u7b56\u306e\u65b9\u5411\uff1aOS\u3067\u6291\u3048\u308b\uff0f\u30a2\u30d7\u30ea\u3067\u660e\u793a\u3059\u308b<\/h3> <p>\u5bfe\u7b56\u306f\u4e8c\u5c64\u3042\u308a\u307e\u3059\u3002OS\u5074\u3067\u300cIPv6\u306f\u4f7f\u3046\/\u4f7f\u308f\u306a\u3044\u300d\u3092\u660e\u78ba\u306b\u3057\u3001\u30a2\u30d7\u30ea\u5074\u3067\u3082\u300c\u5f85\u53d7\u306fIPv4\/IPv6\u3069\u3061\u3089\u304b\u300d\u300c\u89e3\u6c7a\u7d50\u679c\u306e\u6271\u3044\u300d\u3092\u660e\u793a\u3059\u308b\u3002\u3069\u3061\u3089\u304b\u7247\u65b9\u3060\u3051\u3060\u3068\u3001\u518d\u767a\u3057\u307e\u3059\u3002<\/p> <table border=\"1\" cellspacing=\"0\" cellpadding=\"6\" style=\"border-collapse:collapse; width:100%;\"> <tr> <th style=\"background-color:#eeeeee; width:38%;\">\u30ec\u30a4\u30e4<\/th> <th style=\"background-color:#eeeeee;\">\u30c1\u30a7\u30c3\u30af\/\u65b9\u91dd\uff08\u4f8b\uff09<\/th> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">OS\uff08sysctl\/IF\u8a2d\u5b9a\uff09<\/td> <td>IPv6\u3092\u4f7f\u3046\u306a\u3089IF\u306b\u4ed8\u4e0e\u3055\u308c\u7d4c\u8def\u304c\u3042\u308b\u304b\u3001\u4f7f\u308f\u306a\u3044\u306a\u3089\u7121\u52b9\u5316\u65b9\u91dd\u3092\u7d71\u4e00\uff08\u90e8\u5206\u7121\u52b9\u5316\u306f\u4e8b\u6545\u304c\u5897\u3048\u308b\uff09<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">DNS\/\u540d\u524d\u89e3\u6c7a<\/td> <td>AAAA\u306e\u8fd4\u308a\u65b9\u3068\u512a\u5148\u9806\u4f4d\u3092\u628a\u63e1\u3002\u74b0\u5883\u5dee\u304c\u3042\u308b\u306a\u3089\u3001\u8a18\u9332\u3068\u76e3\u8996\u3092\u30bb\u30c3\u30c8\u3067<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">\u30a2\u30d7\u30ea<\/td> <td>\u5f85\u53d7\u306f 0.0.0.0 \/ :: \u306e\u3069\u3061\u3089\u304b\u3092\u8981\u4ef6\u3067\u6c7a\u3081\u308b\u3002\u5fc5\u8981\u306a\u3089IPv4\u512a\u5148\u3084\u89e3\u6c7a\u7d50\u679c\u306e\u30d5\u30a3\u30eb\u30bf\uff08\u5b9f\u88c5\/\u8a2d\u5b9a\uff09\u3092\u691c\u8a0e<\/td> <\/tr> <\/table> <p>\u6b21\u7ae0\u3067\u306f\u3001\u540c\u3058\u201c\u30ed\u30fc\u30ab\u30eb\u5074\u306e\u524d\u63d0\u5d29\u308c\u201d\u3067\u3082\u3001\u7d4c\u8def\u5236\u5fa1\uff08\u30dd\u30ea\u30b7\u30fc\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u7b49\uff09\u3084\u9001\u4fe1\u5143\u56fa\u5b9a\u304c\u7d61\u3080\u30b1\u30fc\u30b9\u3092\u6271\u3044\u307e\u3059\u3002\u3053\u3053\u304c\u5206\u304b\u308b\u3068\u3001EADDRNOTAVAIL\u304c\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u4e0d\u5b89\u5b9a\u300d\u3067\u306f\u306a\u304f\u300c\u8a2d\u8a08\u306e\u524d\u63d0\u304c\u63fa\u308c\u3066\u3044\u308b\u300d\u30b5\u30a4\u30f3\u3068\u3057\u3066\u8aad\u3081\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec07\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff0f\u30dd\u30ea\u30b7\u30fc\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff1a\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u56fa\u5b9a\u306e\u843d\u3068\u3057\u7a74<\/h2> <p>EADDRNOTAVAIL \u304c\u300cIP\u304c\u5b58\u5728\u3057\u306a\u3044\u300d\u3060\u3051\u3067\u306a\u304f\u300c\u9001\u4fe1\u5143\u306e\u6c7a\u3081\u65b9\u304c\u7834\u7dbb\u3057\u3066\u3044\u308b\u300d\u30b5\u30a4\u30f3\u306b\u306a\u308b\u306e\u304c\u3001\u7d4c\u8def\u5236\u5fa1\u304c\u7d61\u3080\u30b1\u30fc\u30b9\u3067\u3059\u3002\u8907\u6570NIC\u3001\u8907\u6570\u7d4c\u8def\u3001VPN\u3001VRF\u3001\u30af\u30e9\u30a6\u30c9\u306e\u30bb\u30ab\u30f3\u30c0\u30eaNIC\u306a\u3069\u304c\u3042\u308b\u3068\u3001<strong>\u201c\u3069\u306eIF\u304b\u3089\u51fa\u3059\u304b\u201d<\/strong>\u3068<strong>\u201c\u3069\u306e\u9001\u4fe1\u5143IP\u3092\u4f7f\u3046\u304b\u201d<\/strong>\u304c\u81ea\u660e\u3067\u306f\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p> <h3>\u307e\u305a\u62bc\u3055\u3048\u308b\u4e8b\u5b9f\uff1a\u9001\u4fe1\u5143IP\u306f\u300cbind\u300d\u3067\u306f\u306a\u304f\u300c\u7d4c\u8def\u300d\u3067\u6c7a\u307e\u308b\u3053\u3068\u304c\u3042\u308b<\/h3> <p>\u30a2\u30d7\u30ea\u304c\u9001\u4fe1\u5143IP\u3092\u660e\u793a\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3001Linux\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u898b\u3066\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u3092\u9078\u3073\u307e\u3059\u3002\u3053\u3053\u3067\u30dd\u30ea\u30b7\u30fc\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff08<code>ip rule<\/code>\uff09\u3084\u8907\u6570\u30c6\u30fc\u30d6\u30eb\u3001\u512a\u5148\u5ea6\u304c\u7d61\u3080\u3068\u3001\u60f3\u5b9a\u3068\u9055\u3046IF\u304c\u9078\u3070\u308c\u3001<strong>\u305d\u306eIF\u4e0a\u306b\u9001\u4fe1\u5143\u3068\u3057\u3066\u4f7f\u3048\u308b\u30a2\u30c9\u30ec\u30b9\u304c\u7121\u3044<\/strong>\u72b6\u614b\u306b\u843d\u3061\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3068\u304d connect() \u304c\u5931\u6557\u3057\u3001EADDRNOTAVAIL \u304c\u898b\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u9006\u306b\u3001\u30a2\u30d7\u30ea\u304c\u9001\u4fe1\u5143IP\u3092\u56fa\u5b9a\uff08\u660e\u793abind\uff09\u3057\u3066\u3044\u308b\u5834\u5408\u3082\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u56fa\u5b9a\u3057\u305f\u9001\u4fe1\u5143IP\u304c\u300c\u305d\u306e\u6642\u70b9\u3067OS\u306b\u5b58\u5728\u3057\u306a\u3044\u300d\u300c\u7d4c\u8def\u7684\u306b\u4e0d\u6574\u5408\uff08\u8fd4\u308a\u304c\u5225IF\u306b\u306a\u308b\u7b49\uff09\u300d\u3060\u3068\u3001\u3084\u306f\u308a\u7834\u7dbb\u3057\u307e\u3059\u3002\u3053\u3053\u306f\u201c\u6b63\u3057\u3055\u201d\u306e\u8b70\u8ad6\u3088\u308a\u3001<strong>\u5b9f\u969b\u306bOS\u304c\u3069\u3046\u9078\u3093\u3067\u3044\u308b\u304b<\/strong>\u3092\u89b3\u6e2c\u3057\u3066\u3001\u8b70\u8ad6\u306e\u6e29\u5ea6\u3092\u4e0b\u3052\u308b\u306e\u304c\u5148\u3067\u3059\u3002<\/p> <h3>\u89b3\u6e2c\u306e\u57fa\u672c\u30bb\u30c3\u30c8\uff1aip route get \u3067\u201cOS\u306e\u7b54\u3048\u201d\u3092\u898b\u308b<\/h3> <p>\u7d4c\u8def\u306b\u8ff7\u3063\u305f\u3089\u3001\u307e\u305a <code>ip route get<\/code> \u3067\u300c\u305d\u306e\u5b9b\u5148\u306b\u5bfe\u3057\u3001\u3069\u306eIF\u3067\u3001\u3069\u306e\u9001\u4fe1\u5143\u304c\u9078\u3070\u308c\u308b\u304b\u300d\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u673a\u4e0a\u306e\u8a2d\u5b9a\u8aad\u307f\u3088\u308a\u5f37\u3044\u3067\u3059\u3002<\/p> <pre><code># \u5b9b\u5148\u306b\u5bfe\u3059\u308b\u7d4c\u8def\u30fb\u9001\u4fe1\u5143\u306e\u9078\u629e\uff08\u4f8b\uff09 ip route get 203.0.113.10 ip -4 route get 203.0.113.10 ip -6 route get 2001:db8::10<\/code><\/pre> <p>\u6b21\u306b\u3001\u30dd\u30ea\u30b7\u30fc\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u3042\u308b\u306a\u3089 <code>ip rule<\/code> \u3068\u5404\u30c6\u30fc\u30d6\u30eb\u306e\u4e2d\u8eab\u3092\u898b\u307e\u3059\u3002<\/p> <pre><code>ip rule show ip route show table main # \u8ffd\u52a0\u30c6\u30fc\u30d6\u30eb\u304c\u3042\u308b\u5834\u5408\uff08\u4f8b\uff1a100, 200 \u306a\u3069\uff09 ip route show table 100 ip route show table 200<\/code><\/pre> <hr> <h3>\u3042\u308a\u304c\u3061\u306a\u4e8b\u6545\u30d1\u30bf\u30fc\u30f3<\/h3> <ul> <li><strong>\u8907\u6570NIC\u3067\u623b\u308a\u7d4c\u8def\u304c\u5225IF<\/strong>\uff1a\u9001\u4fe1\u5143\u56fa\u5b9a\u306b\u3088\u308a\u3001\u623b\u308a\u304c\u975e\u5bfe\u79f0\u306b\u306a\u308a\u3001\u63a5\u7d9a\u304c\u4e0d\u5b89\u5b9a\u5316\u3002\u7d50\u679c\u3068\u3057\u3066\u518d\u63a5\u7d9a\u304c\u5897\u3048\u3001\u4e00\u6642\u30dd\u30fc\u30c8\u6d88\u8cbb\u304c\u9032\u3080\u3002<\/li> <li><strong>VPN\/\u30d7\u30ed\u30ad\u30b7\u5c0e\u5165\u3067\u30c7\u30d5\u30a9\u30eb\u30c8\u7d4c\u8def\u304c\u5909\u5316<\/strong>\uff1a\u30a2\u30d7\u30ea\u306e\u9001\u4fe1\u5143\u56fa\u5b9a\u304c\u3001\u5c0e\u5165\u5f8c\u306e\u7d4c\u8def\u3068\u6574\u5408\u3057\u306a\u304f\u306a\u308b\u3002<\/li> <li><strong>\u30af\u30e9\u30a6\u30c9\u74b0\u5883\u3067\u30bb\u30ab\u30f3\u30c0\u30eaIP\/\u30bb\u30ab\u30f3\u30c0\u30eaNIC\u3092\u60f3\u5b9a\u3057\u3066\u3044\u305f\u304c\u672a\u4ed8\u4e0e<\/strong>\uff1a\u8a2d\u5b9a\u4e0a\u306f\u5b58\u5728\u3059\u308b\u524d\u63d0\u3067\u3082\u3001\u5b9f\u969b\u306b\u306f\u30a2\u30bf\u30c3\u30c1\u3055\u308c\u3066\u3044\u306a\u3044\u77ac\u9593\u304c\u3042\u308b\u3002<\/li> <li><strong>rp_filter\uff08\u9006\u65b9\u5411\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\uff09\u8a2d\u5b9a\u306e\u5f71\u97ff<\/strong>\uff1a\u975e\u5bfe\u79f0\u7d4c\u8def\u3092\u201c\u62d2\u5426\u201d\u3059\u308b\u65b9\u5411\u306b\u50cd\u304d\u3001\u758e\u901a\u304c\u63fa\u308c\u3066\u3001\u7d50\u679c\u3068\u3057\u3066\u63a5\u7d9a\u8a66\u884c\u304c\u5897\u3048\u308b\u3002<\/li> <\/ul> <table border=\"1\" cellspacing=\"0\" cellpadding=\"6\" style=\"border-collapse:collapse; width:100%;\"> <tr> <th style=\"background-color:#eeeeee; width:34%;\">\u898b\u3048\u308b\u73fe\u8c61<\/th> <th style=\"background-color:#eeeeee;\">\u78ba\u8a8d\u30dd\u30a4\u30f3\u30c8<\/th> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">connect \u304c\u65ad\u7d9a\u5931\u6557\u3057\u3001\u305f\u307e\u306b EADDRNOTAVAIL<\/td> <td><code>ip route get<\/code> \u306e src \u8868\u793a\u3001<code>ip rule<\/code> \u3068\u30c6\u30fc\u30d6\u30eb\u3001<code>ss -s<\/code>\uff08TIME_WAIT\u5897\u52a0\uff09<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">\u7279\u5b9a\u30ce\u30fc\u30c9\u3060\u3051\u767a\u751f<\/td> <td>\u305d\u306e\u30ce\u30fc\u30c9\u3060\u3051\u7d4c\u8def\/IF\/IP\u304c\u9055\u3046\uff08\u4ed8\u4e0e\u6f0f\u308c\u3001\u30eb\u30fc\u30eb\u5dee\u3001NM\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u5dee\uff09<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">VPN\u5207\u66ff\u3084LB\u5909\u66f4\u306e\u76f4\u5f8c\u306b\u5897\u3048\u308b<\/td> <td>\u30c7\u30d5\u30a9\u30eb\u30c8\u7d4c\u8def\u3068\u30dd\u30ea\u30b7\u30fc\u30eb\u30fc\u30c8\u306e\u512a\u5148\u5ea6\u3001\u9001\u4fe1\u5143\u56fa\u5b9a\u306e\u6574\u5408\u6027<\/td> <\/tr> <\/table> <p>\u3053\u306e\u7ae0\u306e\u7d50\u8ad6\u306f\u5358\u7d14\u3067\u3059\u3002<strong>\u300c\u9001\u4fe1\u5143\u3092\u56fa\u5b9a\u3059\u308b\u300d\u3053\u3068\u306f\u201c\u8a2d\u8a08\u306e\u5951\u7d04\u201d<\/strong>\u3067\u3059\u3002\u5951\u7d04\u304c\u3042\u308b\u306a\u3089\u76e3\u8996\u3068\u691c\u8a3c\uff08\u7d4c\u8def\u78ba\u8a8d\u3001\u30a2\u30c9\u30ec\u30b9\u5b58\u5728\u78ba\u8a8d\uff09\u304c\u5fc5\u8981\u3067\u3001\u5951\u7d04\u304c\u7121\u3044\u306a\u3089\u56fa\u5b9a\u3057\u306a\u3044\u307b\u3046\u304c\u904b\u7528\u306f\u5b89\u5b9a\u3057\u3084\u3059\u3044\u3002\u6b21\u7ae0\u3067\u306f\u3001OS\u5074\u3067\u201c\u6b63\u3057\u3044\u4f4f\u6240\u201d\u3092\u53d6\u308a\u623b\u3059\u518d\u8a2d\u5b9a\u7b56\u3092\u3001RHEL\/NetworkManager\u524d\u63d0\u3067\u6574\u7406\u3057\u307e\u3059\u3002<\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec08\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u518d\u8a2d\u5b9a\u7b56\uff08OS\u5074\uff09\uff1aip addr \/ nmcli \/ NetworkManager\u3067\u201c\u6b63\u3057\u3044\u4f4f\u6240\u201d\u3092\u53d6\u308a\u623b\u3059<\/h2> <p>\u3053\u3053\u304b\u3089\u306f\u300c\u539f\u56e0\u304c\u30a2\u30c9\u30ec\u30b9\u306e\u4e0d\u5728\u30fb\u4ed8\u4e0e\u6f0f\u308c\u30fb\u8d77\u52d5\u9806\u5e8f\u30fb\u7d4c\u8def\u5dee\u300d\u306b\u5bc4\u3063\u3066\u3044\u308b\u5834\u5408\u306e\u3001OS\u5074\u306e\u518d\u8a2d\u5b9a\u7b56\u3067\u3059\u3002\u5927\u524d\u63d0\u3068\u3057\u3066\u3001<strong>\u672c\u756a\u3067\u306e\u5909\u66f4\u306f\u201c\u6700\u5c0f\u30fb\u53ef\u9006\u30fb\u89b3\u6e2c\u4ed8\u304d\u201d<\/strong>\u304c\u57fa\u672c\u3067\u3059\u3002\u7126\u3063\u3066\u8a2d\u5b9a\u3092\u76db\u308b\u3068\u3001\u93ae\u706b\u3069\u3053\u308d\u304b\u3001\u5207\u308a\u5206\u3051\u4e0d\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p> <h3>1) \u307e\u305a\u201c\u73fe\u72b6\u201d\u3092\u56fa\u5b9a\u3059\u308b\uff08\u5909\u66f4\u524d\u306e\u4fdd\u5b58\uff09<\/h3> <p>NetworkManager\u914d\u4e0b\u306a\u3089\u3001\u63a5\u7d9a\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3068\u73fe\u5728\u306e\u72b6\u614b\u3092\u5fc5\u305a\u8a18\u9332\u3057\u307e\u3059\u3002\u969c\u5bb3\u5bfe\u5fdc\u306f\u3001\u5f8c\u304b\u3089\u8aac\u660e\u3067\u304d\u308b\u3053\u3068\u304c\u4fa1\u5024\u3067\u3059\u3002<\/p> <pre><code>date hostname ip -br addr ip route nmcli -t dev status nmcli -t con show --active nmcli -t con show &lt;CONNECTION_NAME&gt; 2&gt;\/dev\/null || true<\/code><\/pre> <hr> <h3>2) \u201c\u4eca\u3060\u3051\u76f4\u3059\u201d\u306e\u5fdc\u6025\u51e6\u7f6e\uff08\u6c38\u7d9a\u5316\u306f\u5225\uff09<\/h3> <p>\u7dca\u6025\u3067\u4e00\u6642\u7684\u306bIP\u3092\u4ed8\u4e0e\u3057\u3001\u30b5\u30fc\u30d3\u30b9\u3092\u5fa9\u65e7\u3055\u305b\u305f\u3044\u5834\u5408\u3001<code>ip addr add<\/code> \u3067\u8ffd\u52a0\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3053\u308c\u306f\u518d\u8d77\u52d5\u3067\u6d88\u3048\u307e\u3059\u3002\u5fdc\u6025\u51e6\u7f6e\u3068\u3057\u3066\u5272\u308a\u5207\u308a\u3001\u5fc5\u305a\u6b21\u306e\u6c38\u7d9a\u8a2d\u5b9a\u306b\u9032\u307f\u307e\u3059\u3002<\/p> <pre><code># \u4f8b\uff1a\u4e00\u6642\u7684\u306bIP\u3092\u4ed8\u4e0e\uff08\u74b0\u5883\u306b\u5408\u308f\u305b\u3066\u7f6e\u63db\uff09 ip addr add 192.0.2.10\/24 dev eth0<\/code><\/pre> <p>\u3053\u306e\u6642\u70b9\u3067\u3001\u30b5\u30fc\u30d3\u30b9\u304c bind \u3067\u304d\u308b\u304b\uff08EADDRNOTAVAIL\u304c\u6d88\u3048\u308b\u304b\uff09\u3092\u78ba\u8a8d\u3057\u3001\u539f\u56e0\u304c\u201cIP\u4e0d\u5728\u201d\u306b\u5bc4\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u65e9\u671f\u306b\u78ba\u5b9a\u3055\u305b\u307e\u3059\u3002<\/p> <hr> <h3>3) \u6c38\u7d9a\u8a2d\u5b9a\uff08RHEL\u7cfb\u3067\u306e\u672c\u547d\uff09\uff1anmcli \u3067\u63a5\u7d9a\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u76f4\u3059<\/h3> <p>RHEL 8\/9 \u3067\u306f NetworkManager \u304c\u6a19\u6e96\u3067\u3059\u3002\u6c38\u7d9a\u5316\u306f nmcli \u3067\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u76f4\u3057\u3001\u518d\u63a5\u7d9a\u3057\u3066\u53cd\u6620\u3057\u307e\u3059\uff08\u624b\u52d5\u7de8\u96c6\u3088\u308a\u5b89\u5168\u306a\u3053\u3068\u304c\u591a\u3044\uff09\u3002<\/p> <pre><code># \u63a5\u7d9a\u540d\u3092\u78ba\u8a8d nmcli -t con show # \u4f8b\uff1aIPv4\u3092\u624b\u52d5\u306b\u3057\u3066\u30a2\u30c9\u30ec\u30b9\/\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\/DNS\u3092\u8a2d\u5b9a\uff08\u5024\u306f\u8981\u4ef6\u306b\u5408\u308f\u305b\u308b\uff09 nmcli con mod \"&lt;CONNECTION_NAME&gt;\" ipv4.method manual nmcli con mod \"&lt;CONNECTION_NAME&gt;\" ipv4.addresses \"192.0.2.10\/24\" nmcli con mod \"&lt;CONNECTION_NAME&gt;\" ipv4.gateway \"192.0.2.1\" nmcli con mod \"&lt;CONNECTION_NAME&gt;\" ipv4.dns \"192.0.2.53,192.0.2.54\" # \u53cd\u6620\uff08\u77ac\u65ad\u306e\u5f71\u97ff\u304c\u3042\u308b\u305f\u3081\u5b9f\u65bd\u30bf\u30a4\u30df\u30f3\u30b0\u306f\u8981\u8abf\u6574\uff09 nmcli con down \"&lt;CONNECTION_NAME&gt;\" nmcli con up \"&lt;CONNECTION_NAME&gt;\"<\/code><\/pre> <p>DHCP\u904b\u7528\u3067\u3001\u7279\u5b9a\u306e\u201c\u56fa\u5b9aIP\u201d\u3067\u306f\u306a\u304f\u300c\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u30a2\u30c9\u30ec\u30b9\u304c\u4ed8\u3044\u3066\u3044\u308b\u3053\u3068\u300d\u304c\u8981\u4ef6\u306a\u3089\u3001<code>ipv4.method auto<\/code> \u306e\u307e\u307e\u3001\u30b5\u30fc\u30d3\u30b9\u5074\u3092 0.0.0.0 \u5f85\u53d7\u306b\u5bc4\u305b\u308b\u307b\u3046\u304c\u4e8b\u6545\u308a\u306b\u304f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u306f\u201c\u56fa\u5b9a\u3059\u3079\u304d\u7406\u7531\u201d\u304c\u3042\u308b\u304b\u3092\u5148\u306b\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p> <hr> <h3>4) \u8d77\u52d5\u9806\u5e8f\u306e\u898b\u76f4\u3057\uff1anetwork-online \u3068\u4e8b\u524d\u30c1\u30a7\u30c3\u30af<\/h3> <p>\u30d6\u30fc\u30c8\u76f4\u5f8c\u306eEADDRNOTAVAIL\u306f\u300cIP\u53d6\u5f97\u524d\u306b\u8d77\u52d5\u300d\u306e\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002systemd\u3067 <code>After=network-online.target<\/code> \u3092\u691c\u8a0e\u3057\u3001\u5fc5\u8981\u306a\u3089 <code>ExecStartPre<\/code> \u3067IP\u4ed8\u4e0e\u3092\u5f85\u3064\u4ed5\u7d44\u307f\u3092\u5165\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u518d\u8d77\u52d5\u3067\u76f4\u308b\u300d\u3092\u6e1b\u3089\u3057\u3001\u904b\u7528\u306e\u5834\u3092\u6574\u3048\u307e\u3059\u3002<\/p> <h3>5) sysctl\u306f\u201c\u8981\u4ef6\u304c\u3042\u308b\u3068\u304d\u3060\u3051\u201d<\/h3> <p>\u3088\u304f\u8a71\u984c\u306b\u4e0a\u304c\u308b sysctl\uff08\u4f8b\uff1a<code>net.ipv4.ip_nonlocal_bind<\/code>\u3001\u30dd\u30fc\u30c8\u7bc4\u56f2\u7b49\uff09\u306f\u3001\u52b9\u304f\u5834\u9762\u304c\u3042\u308a\u307e\u3059\u304c\u3001<strong>\u52b9\u304f\u7406\u7531<\/strong>\u304c\u8aac\u660e\u3067\u304d\u306a\u3044\u72b6\u614b\u3067\u6295\u5165\u3059\u308b\u3068\u5371\u967a\u3067\u3059\u3002\u7279\u306b\u975e\u30ed\u30fc\u30ab\u30ebbind\u306f\u3001HA\u8981\u4ef6\u304c\u3042\u308b\u5834\u5408\u306e\u9078\u629e\u80a2\u3067\u3001\u4e00\u822c\u306e\u30a2\u30d7\u30ea\u306b\u306f\u63a8\u5968\u3057\u306b\u304f\u3044\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p> <table border=\"1\" cellspacing=\"0\" cellpadding=\"6\" style=\"border-collapse:collapse; width:100%;\"> <tr> <th style=\"background-color:#eeeeee; width:30%;\">\u8a2d\u5b9a<\/th> <th style=\"background-color:#eeeeee;\">\u4f7f\u3046\u7406\u7531\uff08\u8981\u4ef6\uff09<\/th> <th style=\"background-color:#eeeeee;\">\u6ce8\u610f\u70b9<\/th> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">ip_nonlocal_bind<\/td> <td>VIP\u304c\u79fb\u52d5\u3057\u3001VIP\u672a\u4ed8\u4e0e\u3067\u3082\u8d77\u52d5\u3057\u3066\u5f85\u3061\u305f\u3044<\/td> <td>\u8aa4\u8a2d\u5b9a\u3092\u96a0\u3059\u9762\u304c\u3042\u308b\u3002VIP\u5b58\u5728\u306e\u76e3\u8996\u3068\u30bb\u30c3\u30c8\u3067<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">ip_local_port_range<\/td> <td>\u77ed\u547d\u63a5\u7d9a\u304c\u591a\u304f\u4e00\u6642\u30dd\u30fc\u30c8\u67af\u6e07\u304c\u7591\u308f\u308c\u308b<\/td> <td>\u5897\u3084\u305b\u3070\u826f\u3044\u3067\u306f\u306a\u3044\u3002\u63a5\u7d9a\u518d\u5229\u7528\/\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3082\u540c\u6642\u306b\u898b\u76f4\u3059<\/td> <\/tr> <\/table> <p>OS\u5074\u3067\u4f4f\u6240\u3092\u6b63\u3057\u305f\u3089\u3001\u6b21\u306f\u30a2\u30d7\u30ea\u5074\u3067\u3059\u3002\u6b21\u7ae0\u3067\u306f\u300c\u56fa\u5b9abind\u3092\u3084\u3081\u308b\u300d\u300c\u518d\u89e3\u6c7a\u30fb\u518d\u8a66\u884c\u3092\u8a2d\u8a08\u3059\u308b\u300d\u306a\u3069\u3001\u74b0\u5883\u5909\u5316\u306b\u5f37\u3044\u4f5c\u308a\u65b9\u3078\u5bc4\u305b\u307e\u3059\u3002<\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec09\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u518d\u8a2d\u5b9a\u7b56\uff08\u30a2\u30d7\u30ea\u5074\uff09\uff1a0.0.0.0 bind\u3001\u518d\u89e3\u6c7a\u3001\u30ea\u30c8\u30e9\u30a4\u8a2d\u8a08\u3067\u74b0\u5883\u5909\u5316\u306b\u5f37\u304f\u3059\u308b<\/h2> <p>EADDRNOTAVAIL\u306e\u518d\u767a\u3092\u6e1b\u3089\u3059\u4e00\u756a\u306e\u8fd1\u9053\u306f\u3001\u30a2\u30d7\u30ea\u304c\u300c\u5909\u308f\u308a\u5f97\u308b\u524d\u63d0\u300d\u306b\u4f9d\u5b58\u3057\u3059\u304e\u306a\u3044\u3053\u3068\u3067\u3059\u3002\u7279\u306b\u3001<strong>\u56fa\u5b9aIP\u3078\u306ebind<\/strong>\u3084\u3001<strong>\u9001\u4fe1\u5143IP\u306e\u56fa\u5b9a<\/strong>\u306f\u3001\u8981\u4ef6\u304c\u7121\u3044\u9650\u308a\u904b\u7528\u30b3\u30b9\u30c8\u3092\u62bc\u3057\u4e0a\u3052\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u201c\u5951\u7d04\u304c\u306a\u3044\u306a\u3089\u56fa\u5b9a\u3057\u306a\u3044\u201d\u3092\u57fa\u672c\u65b9\u91dd\u306b\u3057\u307e\u3059\u3002<\/p> <h3>\u5f85\u53d7\uff08\u30b5\u30fc\u30d0\u5074\uff09\uff1a\u7279\u5b9aIP\u306b\u7e1b\u3089\u305a\u3001\u5230\u9054\u5236\u5fa1\u306f\u5916\u5074\u3078<\/h3> <p>Web\/API\u7b49\u306e\u4e00\u822c\u7684\u306a\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3001<strong>0.0.0.0\uff08\u5168IF\uff09<\/strong>\u3067\u5f85\u53d7\u3057\u3001\u516c\u958b\u7bc4\u56f2\u306fFW\/LB\/Ingress\u3067\u5236\u5fa1\u3059\u308b\u307b\u3046\u304c\u3001\u74b0\u5883\u5dee\u3067\u5d29\u308c\u306b\u304f\u3044\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001DHCP\u66f4\u65b0\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u518d\u69cb\u6210\u3001Pod\u79fb\u52d5\u306a\u3069\u306e\u5909\u5316\u306b\u5bfe\u3057\u3001bind\u5931\u6557\uff08EADDRNOTAVAIL\uff09\u3092\u8d77\u3053\u3057\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002<\/p> <p>\u3069\u3046\u3057\u3066\u3082\u300c\u3053\u306eIP\u3067\u306e\u307f\u53d7\u3051\u305f\u3044\u300d\u8981\u4ef6\u304c\u3042\u308b\u306a\u3089\u3001\u305d\u306eIP\u304c\u201c\u5e38\u306b\u5b58\u5728\u3059\u308b\u201d\u3053\u3068\u3092\u904b\u7528\u3067\u62c5\u4fdd\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001IP\u4ed8\u4e0e\u306e\u76e3\u8996\u3001\u8d77\u52d5\u524d\u30c1\u30a7\u30c3\u30af\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u6642\u306eVIP\u4ed8\u4e0e\u691c\u8a3c\u3001\u69cb\u6210\u5909\u66f4\u624b\u9806\u306e\u6574\u5099\u306a\u3069\u304c\u5fc5\u8981\u3067\u3059\u3002\u3053\u3053\u307e\u3067\u542b\u3081\u3066\u521d\u3081\u3066\u201c\u56fa\u5b9a\u306b\u3059\u308b\u4fa1\u5024\u201d\u304c\u51fa\u307e\u3059\u3002<\/p> <hr> <h3>\u5916\u5411\u304d\u63a5\u7d9a\uff08\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\uff09\uff1a\u9001\u4fe1\u5143\u3092\u56fa\u5b9a\u3057\u306a\u3044\u3001\u63a5\u7d9a\u3092\u5897\u3084\u3057\u3059\u304e\u306a\u3044<\/h3> <p>connect\u5074\u306eEADDRNOTAVAIL\u306f\u3001\u9001\u4fe1\u5143\u56fa\u5b9a\u306e\u4e0d\u6574\u5408\u3084\u3001\u4e00\u6642\u30dd\u30fc\u30c8\u67af\u6e07\u304c\u7d61\u3080\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30a2\u30d7\u30ea\u5074\u3067\u3067\u304d\u308b\u57fa\u672c\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p> <ul> <li><strong>\u9001\u4fe1\u5143IP\/\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\u3092\u56fa\u5b9a\u3057\u306a\u3044<\/strong>\uff08\u8981\u4ef6\u304c\u3042\u308b\u5834\u5408\u306e\u307f\u3002\u56fa\u5b9a\u3059\u308b\u3068\u7d4c\u8def\u5909\u66f4\u3084NAT\u3067\u7834\u7dbb\u3057\u3084\u3059\u3044\uff09<\/li> <li><strong>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30d7\u30fc\u30eb\u3084keep-alive<\/strong>\u3092\u4f7f\u3044\u3001\u77ed\u547d\u63a5\u7d9a\u3092\u6e1b\u3089\u3059<\/li> <li>\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\uff08\u63a5\u7d9a\/\u8aad\u307f\u53d6\u308a\uff09\u3092\u660e\u793a\u3057\u3001\u969c\u5bb3\u6642\u306b\u7121\u9650\u5f85\u3061\u3057\u306a\u3044<\/li> <li>\u30ea\u30c8\u30e9\u30a4\u306f\u6307\u6570\u30d0\u30c3\u30af\u30aa\u30d5\uff0b\u30b8\u30c3\u30bf\u3067\u3001\u5931\u6557\u6642\u306b\u201c\u540c\u6642\u591a\u767a\u201d\u3055\u305b\u306a\u3044\uff08\u88ab\u5bb3\u6700\u5c0f\u5316\uff09<\/li> <\/ul> <p>\u3053\u3053\u3067\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u304c\u300c\u5931\u6557\u3057\u305f\u3089\u5373\u30ea\u30c8\u30e9\u30a4\u3092\u9ad8\u901f\u3067\u56de\u3059\u300d\u5b9f\u88c5\u3067\u3059\u3002\u969c\u5bb3\u6642\u306b\u3053\u308c\u3092\u3084\u308b\u3068\u3001\u63a5\u7d9a\u8a66\u884c\u304c\u5897\u3048\u3066TIME_WAIT\u304c\u5897\u3048\u3001\u7d50\u679c\u3068\u3057\u3066\u4e00\u6642\u30dd\u30fc\u30c8\u6d88\u8cbb\u304c\u9032\u307f\u3001EADDRNOTAVAIL\u3092\u81ea\u5206\u3067\u5897\u5e45\u3055\u305b\u307e\u3059\u3002\u30c0\u30e1\u30fc\u30b8\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u306e\u89b3\u70b9\u3067\u306f\u3001<strong>\u201c\u901f\u3044\u5fa9\u65e7\u201d\u3088\u308a\u201c\u60aa\u5316\u3055\u305b\u306a\u3044\u5fa9\u65e7\u201d<\/strong>\u304c\u5148\u3067\u3059\u3002<\/p> <hr> <h3>DNS\u3068\u518d\u89e3\u6c7a\uff1aIP\u304c\u5909\u308f\u308b\u4e16\u754c\u3067\u306f\u201c\u89e3\u6c7a\u7d50\u679c\u3092\u63e1\u308a\u3057\u3081\u306a\u3044\u201d<\/h3> <p>\u30af\u30e9\u30b9\u30bf\u3084LB\u914d\u4e0b\u3067\u306f\u3001\u5b9b\u5148IP\u304c\u5909\u308f\u308b\u3053\u3068\u304c\u524d\u63d0\u3067\u3059\u3002\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u89e3\u6c7a\u7d50\u679c\u3092\u30d7\u30ed\u30bb\u30b9\u8d77\u52d5\u6642\u306b\u4e00\u5ea6\u3060\u3051\u56fa\u5b9a\u3057\u7d9a\u3051\u308b\u3068\u3001\u5207\u66ff\u6642\u306b\u5931\u6557\u304c\u7d9a\u304d\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8a2d\u8a08\u5224\u65ad\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p> <table border=\"1\" cellspacing=\"0\" cellpadding=\"6\" style=\"border-collapse:collapse; width:100%;\"> <tr> <th style=\"background-color:#eeeeee; width:36%;\">\u8ad6\u70b9<\/th> <th style=\"background-color:#eeeeee;\">\u8003\u3048\u65b9<\/th> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">DNS\u7d50\u679c\u306e\u30ad\u30e3\u30c3\u30b7\u30e5<\/td> <td>TTL\u3092\u5c0a\u91cd\u3057\u3001\u9577\u6642\u9593\u56fa\u5b9a\u3057\u306a\u3044\u3002\u969c\u5bb3\u6642\u306e\u518d\u89e3\u6c7a\u304c\u3067\u304d\u308b\u8a2d\u8a08\u306b\u3059\u308b<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">IPv6\/IPv4\u306e\u512a\u5148<\/td> <td>\u74b0\u5883\u3067\u5dee\u304c\u51fa\u308b\u306a\u3089\u201c\u660e\u793a\u3059\u308b\u201d\u304b\u201c\u7d71\u4e00\u3059\u308b\u201d\u3002\u4e2d\u9014\u534a\u7aef\u306f\u4e0d\u5b89\u5b9a\u8981\u56e0\u306b\u306a\u308b<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">\u30ea\u30c8\u30e9\u30a4\u6226\u7565<\/td> <td>\u5373\u6642\u9023\u6253\u3067\u306f\u306a\u304f\u3001\u30d0\u30c3\u30af\u30aa\u30d5\uff0b\u30b8\u30c3\u30bf\u3002\u969c\u5bb3\u3092\u5897\u5e45\u3055\u305b\u306a\u3044<\/td> <\/tr> <\/table> <p>\u6b21\u306e\u6700\u7d42\u7ae0\u3067\u306f\u3001\u3053\u3053\u307e\u3067\u306e\u4f0f\u7dda\u3092\u56de\u53ce\u3057\u307e\u3059\u3002EADDRNOTAVAIL(99)\u306f\u300c\u30a2\u30c9\u30ec\u30b9\u304c\u7121\u3044\u300d\u3068\u3044\u3046\u5358\u767a\u306e\u4e0d\u5177\u5408\u3067\u306f\u306a\u304f\u3001<strong>\u201c\u6307\u5b9a\uff1d\u5951\u7d04\u201d\u304c\u904b\u7528\u3068\u30ba\u30ec\u305f<\/strong>\u3053\u3068\u304c\u8868\u9762\u5316\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u4e00\u822c\u8ad6\u306e\u5bfe\u51e6\u306b\u306f\u9650\u754c\u304c\u3042\u308a\u3001\u69cb\u6210\u30fb\u5951\u7d04\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u4ef6\u304c\u7d61\u3080\u307b\u3069\u3001\u5c02\u9580\u5bb6\u306b\u76f8\u8ac7\u3059\u308b\u5224\u65ad\u304c\u5408\u7406\u7684\u306b\u306a\u308a\u307e\u3059\u3002<\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <a id=\"sec10\"><\/a> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u5e30\u7d50\uff1a\u300c\u6307\u5b9a\u300d\u306f\u5951\u7d04\u2014\u30a2\u30c9\u30ec\u30b9\u3068\u69cb\u6210\u3092\u201c\u524d\u63d0\u201d\u306b\u3057\u306a\u3044\u904b\u7528\u3078<\/h2> <p>EADDRNOTAVAIL(99) \u3092\u4e00\u8a00\u3067\u307e\u3068\u3081\u308b\u306a\u3089\u3001\u300c\u305d\u306e\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u3044\u307e\u3053\u306e\u5b9f\u884c\u74b0\u5883\u3067\u306f\u201c\u81ea\u5206\u306e\u3082\u306e\u201d\u3068\u3057\u3066\u6210\u7acb\u3057\u3066\u3044\u306a\u3044\u300d\u3067\u3059\u3002\u3053\u3053\u307e\u3067\u306e\u7ae0\u3067\u898b\u3066\u304d\u305f\u3068\u304a\u308a\u3001\u539f\u56e0\u306f\u5927\u304d\u304f2\u7cfb\u7d71\u306b\u5206\u304b\u308c\u307e\u3059\u3002\u5f85\u53d7\uff08bind\uff09\u3067\u306e\u300c\u5b58\u5728\u3057\u306a\u3044\u30ed\u30fc\u30ab\u30eb\u30a2\u30c9\u30ec\u30b9\u300d\u304b\u3001\u5916\u5411\u304d\u63a5\u7d9a\uff08connect\uff09\u3067\u306e\u300c\u9001\u4fe1\u5143\u306e\u5272\u308a\u5f53\u3066\u5931\u6557\uff08\u9001\u4fe1\u5143\u9078\u629e\uff0f\u4e00\u6642\u30dd\u30fc\u30c8\u67af\u6e07\u306a\u3069\uff09\u300d\u304b\u3002\u3069\u3061\u3089\u3082\u3001\u201c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u4e0d\u5b89\u5b9a\u201d\u3068\u3044\u3046\u66d6\u6627\u306a\u8a00\u3044\u65b9\u306b\u9003\u3052\u308b\u307b\u3069\u3001\u8b70\u8ad6\u304c\u904e\u71b1\u3057\u3001\u73fe\u5834\u306e\u6d88\u8017\u304c\u5897\u3048\u307e\u3059\u3002<\/p> <p>\u305d\u3057\u3066\u3001\u3044\u3061\u3070\u3093\u91cd\u8981\u306a\u5e30\u7d50\u306f\u3053\u3053\u3067\u3059\u3002<strong>\u56fa\u5b9aIP\u3078\u306ebind<\/strong>\u3001<strong>\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u56fa\u5b9a<\/strong>\u3001<strong>VIP\u672a\u4ed8\u4e0e\u3067\u3082\u8d77\u52d5\u3057\u305f\u3044\uff08\u975e\u30ed\u30fc\u30ab\u30ebbind\uff09<\/strong>\u3001<strong>IPv6\u306f\u4f7f\u3046\uff0f\u4f7f\u308f\u306a\u3044<\/strong>\u2015\u2015\u3053\u308c\u3089\u306f\u3059\u3079\u3066\u300c\u6307\u5b9a\u300d\u3067\u3042\u308a\u3001\u6307\u5b9a\u306f\u300c\u5951\u7d04\u300d\u3067\u3059\u3002\u5951\u7d04\u3068\u306f\u3001\u8981\u4ef6\u304c\u3042\u308a\u3001\u8cac\u52d9\u304c\u3042\u308a\u3001\u691c\u8a3c\u3068\u76e3\u8996\u304c\u30bb\u30c3\u30c8\u3067\u3042\u308b\u3001\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002\u5951\u7d04\u304c\u7121\u3044\u306e\u306b\u6307\u5b9a\u3059\u308b\u3068\u3001\u74b0\u5883\u304c\u5c11\u3057\u63fa\u308c\u305f\u3068\u304d\u306b\u7834\u7dbb\u3057\u307e\u3059\u3002\u9006\u306b\u3001\u5951\u7d04\u3068\u3057\u3066\u63e1\u3063\u3066\u3044\u308b\u306a\u3089\u3001\u63fa\u308c\u3092\u524d\u63d0\u306b\u8a2d\u8a08\u3067\u304d\u307e\u3059\u3002<\/p> <hr> <h3>\u201c\u5951\u7d04\u201d\u306b\u3059\u308b\u304b\u3001\u201c\u524d\u63d0\u306b\u3057\u306a\u3044\u201d\u304b\uff1a\u5224\u65ad\u306e\u8ef8<\/h3> <p>\u73fe\u5834\u3067\u60a9\u3080\u306e\u306f\u3001\u300c\u6307\u5b9a\u3092\u6368\u3066\u30660.0.0.0\u3067\u5f85\u53d7\u306b\u5bc4\u305b\u308b\u3079\u304d\u304b\u300d\u300c\u8981\u4ef6\u304c\u3042\u308b\u306e\u3067\u56fa\u5b9a\u3092\u7dad\u6301\u3059\u3079\u304d\u304b\u300d\u3067\u3059\u3002\u4e00\u822c\u8ad6\u3068\u3057\u3066\u306f\u3001\u6b21\u306e\u6574\u7406\u304c\u5b89\u5168\u5074\u3067\u3059\u3002<\/p> <table border=\"1\" cellspacing=\"0\" cellpadding=\"6\" style=\"border-collapse:collapse; width:100%;\"> <tr> <th style=\"background-color:#eeeeee; width:34%;\">\u72b6\u6cc1<\/th> <th style=\"background-color:#eeeeee;\">\u4e8b\u6545\u308a\u306b\u304f\u3044\u65b9\u91dd<\/th> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">Kubernetes\/\u30b3\u30f3\u30c6\u30ca\u3067Pod\u304c\u79fb\u52d5\u3059\u308b<\/td> <td>\u30a2\u30d7\u30ea\u306f0.0.0.0 \/ :: \u5f85\u53d7\u306b\u5bc4\u305b\u3001\u5230\u9054\u5236\u5fa1\u306fService\/Ingress\/Policy\u3067\u62c5\u4fdd\uff08\u56fa\u5b9aIP\u306e\u524d\u63d0\u3092\u6368\u3066\u308b\uff09<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">DHCP\u30fbNW\u518d\u63a5\u7d9a\u3067IP\u304c\u63fa\u308c\u308b<\/td> <td>\u56fa\u5b9abind\u3092\u6e1b\u3089\u3059\uff0f\u3069\u3046\u3057\u3066\u3082\u5fc5\u8981\u306a\u3089\u8d77\u52d5\u9806\u5e8f\uff08network-online\uff09\uff0b\u4e8b\u524d\u30c1\u30a7\u30c3\u30af\uff0b\u76e3\u8996\u3067\u5951\u7d04\u5316<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">VIP\u79fb\u52d5\uff08HA\/VRRP\uff09\u304c\u3042\u308b<\/td> <td>\u8981\u4ef6\u304c\u3042\u308b\u5834\u5408\u306e\u307f\u975e\u30ed\u30fc\u30ab\u30ebbind\u3092\u691c\u8a0e\u3057\u3001VIP\u5b58\u5728\u306e\u76e3\u8996\u3068\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u624b\u9806\u3092\u30bb\u30c3\u30c8\u3067\u8a2d\u8a08<\/td> <\/tr> <tr> <td style=\"background-color:#eeeeee;\">\u5916\u5411\u304d\u77ed\u547d\u63a5\u7d9a\u304c\u591a\u3044<\/td> <td>\u63a5\u7d9a\u518d\u5229\u7528\uff08keep-alive\/\u30d7\u30fc\u30eb\uff09\u30fb\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u30fb\u30d0\u30c3\u30af\u30aa\u30d5\u8a2d\u8a08\u3092\u512a\u5148\u3002\u95c7\u96f2\u306b\u30ea\u30c8\u30e9\u30a4\u3092\u5897\u3084\u3055\u306a\u3044<\/td> <\/tr> <\/table> <p>\u3053\u306e\u8868\u3092\u898b\u3066\u300c\u3046\u3061\u3001\u8907\u6570\u884c\u306b\u5f53\u3066\u306f\u307e\u308b\u306a\u300d\u3068\u611f\u3058\u305f\u306a\u3089\u3001\u4e00\u822c\u8ad6\u3060\u3051\u3067\u201c\u304d\u308c\u3044\u306b\u89e3\u3051\u308b\u201d\u671f\u5f85\u306f\u4e0b\u3052\u305f\u307b\u3046\u304c\u3044\u3044\u3067\u3059\u3002\u306a\u305c\u306a\u3089\u3001EADDRNOTAVAIL\u306f\u5358\u4f53\u306e\u8a2d\u5b9a\u30df\u30b9\u3060\u3051\u3067\u306a\u304f\u3001<strong>\u69cb\u6210\uff08NW\u30fb\u30c7\u30d7\u30ed\u30a4\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\uff09\u306e\u76f8\u4e92\u4f5c\u7528<\/strong>\u3068\u3057\u3066\u51fa\u308b\u3053\u3068\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u300cIPv6\u3092\u534a\u7aef\u306b\u7121\u52b9\u5316\u300d\u300cVPN\u5c0e\u5165\u3067\u7d4c\u8def\u304c\u5909\u5316\u300d\u300c\u30af\u30e9\u30b9\u30bf\u5207\u66ff\u3067VIP\u304c\u9045\u308c\u3066\u4ed8\u4e0e\u300d\u300c\u305d\u306e\u4e0a\u3067\u30a2\u30d7\u30ea\u304c\u9001\u4fe1\u5143\u56fa\u5b9a\u300d\u306a\u3069\u304c\u91cd\u306a\u308b\u3068\u3001\u8868\u9762\u7684\u306a\u30ed\u30b0\u306f\u540c\u3058\u3067\u3082\u3001\u6839\u306e\u539f\u56e0\u306f\u4e00\u3064\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p> <hr> <h3>\u201c\u5834\u3092\u6574\u3048\u308b\u201d\u305f\u3081\u306e\u6700\u7d42\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3> <p>\u6700\u5f8c\u306b\u3001\u73fe\u5834\u3067\u300c\u4f55\u304b\u3089\u624b\u3092\u4ed8\u3051\u308b\u3079\u304d\u304b\u300d\u3092\u8ff7\u3063\u305f\u3068\u304d\u306e\u3001\u9806\u5e8f\u3064\u304d\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u7f6e\u3044\u3066\u304a\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u201c\u6700\u77ed\u5fa9\u65e7\u201d\u3067\u306f\u306a\u304f\u3001\u201c\u88ab\u5bb3\u6700\u5c0f\u5316\u201d\u3068\u201c\u8aac\u660e\u53ef\u80fd\u6027\u201d\u3092\u512a\u5148\u3057\u305f\u9806\u756a\u3067\u3059\u3002<\/p> <ol> <li><strong>bind\u306a\u306e\u304bconnect\u306a\u306e\u304b<\/strong>\u3092\u78ba\u5b9a\uff08\u30ed\u30b0\uff0f\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\uff0f\u5bfe\u8c61\u30d7\u30ed\u30bb\u30b9\u306e\u6319\u52d5\uff09<\/li> <li><strong>IP\u304c\u5b58\u5728\u3059\u308b\u304b<\/strong>\uff08ip -br addr\u3001\u30b3\u30f3\u30c6\u30ca\u306a\u3089\u30b3\u30f3\u30c6\u30ca\u5185\u3067\uff09<\/li> <li><strong>\u7d4c\u8def\u3068\u9001\u4fe1\u5143\u9078\u629e<\/strong>\uff08ip route get\u3001ip rule\uff09<\/li> <li><strong>\u63a5\u7d9a\u72b6\u614b\u3068\u30dd\u30fc\u30c8\u6d88\u8cbb<\/strong>\uff08ss -s\u3001TIME_WAIT\u306e\u5897\u3048\u65b9\uff09<\/li> <li><strong>\u8d77\u52d5\u9806\u5e8f<\/strong>\uff08network-online\u3001ExecStartPre\u306e\u5b58\u5728\u78ba\u8a8d\uff09<\/li> <li><strong>\u5909\u66f4\u306f\u6700\u5c0f\u30fb\u53ef\u9006\u30fb\u89b3\u6e2c\u4ed8\u304d<\/strong>\u3067\u884c\u3044\u3001\u5909\u66f4\u524d\u5f8c\u306e\u72b6\u614b\u3092\u8a18\u9332<\/li> <\/ol> <p>\u3053\u3053\u307e\u3067\u3084\u3063\u3066\u3082\u539f\u56e0\u304c\u4e00\u3064\u306b\u7d5e\u308c\u306a\u3044\u3001\u3042\u308b\u3044\u306f\u300c\u69cb\u6210\u4e0a\u3001\u6307\u5b9a\u3092\u5951\u7d04\u3068\u3057\u3066\u63e1\u308b\u5fc5\u8981\u304c\u3042\u308b\u300d\u5834\u5408\u3001\u7121\u7406\u306b\u4e00\u822c\u8ad6\u3067\u62bc\u3057\u5207\u308b\u306e\u306f\u5371\u967a\u3067\u3059\u3002\u5951\u7d04\u30fb\u6848\u4ef6\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u4ef6\uff08\u5206\u96e2\u5883\u754c\u3001\u5230\u9054\u5236\u5fa1\u3001\u76e3\u67fb\u3001\u5fa9\u65e7\u624b\u9806\uff09\u3092\u542b\u3081\u3066\u8a2d\u8a08\u3057\u76f4\u3057\u305f\u307b\u3046\u304c\u3001\u7d50\u679c\u3068\u3057\u3066\u904b\u7528\u8ca0\u8377\u304c\u4e0b\u304c\u308b\u30b1\u30fc\u30b9\u306f\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p> <p>\u305d\u306e\u3068\u304d\u306b\u983c\u308c\u308b\u76f8\u8ac7\u5148\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3067\u3001\u73fe\u5834\u306e\u6d88\u8017\u306f\u5927\u304d\u304f\u5909\u308f\u308a\u307e\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30fbOS\u30fb\u30a2\u30d7\u30ea\u30fb\u904b\u7528\u306e\u5883\u754c\u3092\u307e\u305f\u3050\u554f\u984c\u307b\u3069\u3001\u7b2c\u4e09\u8005\u8996\u70b9\u3067\u201c\u524d\u63d0\u306e\u885d\u7a81\u201d\u3092\u898b\u3064\u3051\u308b\u306e\u304c\u65e9\u3044\u3067\u3059\u3002\u500b\u5225\u6848\u4ef6\u3067\u300c\u3069\u306e\u6307\u5b9a\u304c\u5951\u7d04\u3067\u3001\u3069\u306e\u6307\u5b9a\u306f\u6368\u3066\u308b\u3079\u304d\u304b\u300d\u3092\u6574\u7406\u3057\u305f\u3044\u5834\u5408\u306f\u3001<strong>\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240<\/strong>\u3078\u306e\u76f8\u8ac7\u30fb\u4f9d\u983c\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\uff1ahttps:\/\/jouhou.main.jp\/?page_id=26983 \uff0f\u96fb\u8a71\uff1a0120-838-831\uff09\u3002<\/p> \r\n\r\n\r\n\r\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u4ed8\u9332\uff1a\u4e3b\u8981\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u5225\u306b\u898b\u305fEADDRNOTAVAIL\u5468\u8fba\u306e\u6ce8\u610f\u70b9<\/h2> <p>\u540c\u3058EADDRNOTAVAIL\u3067\u3082\u3001\u8a00\u8a9e\u3084\u30e9\u30f3\u30bf\u30a4\u30e0\u306e\u201c\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f5c\u6cd5\u201d\u3067\u30cf\u30de\u308a\u3069\u3053\u308d\u304c\u5909\u308f\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u7279\u5b9a\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u4f9d\u5b58\u3057\u306a\u3044\u3001\u6bd4\u8f03\u7684\u666e\u904d\u7684\u306a\u6ce8\u610f\u70b9\u3092\u307e\u3068\u3081\u307e\u3059\uff08\u30d0\u30fc\u30b8\u30e7\u30f3\u5dee\u304c\u3042\u308b\u305f\u3081\u3001\u6700\u7d42\u7684\u306b\u306f\u5229\u7528\u4e2d\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\uff0fOS\u8a2d\u5b9a\u3067\u691c\u8a3c\u3057\u3066\u304f\u3060\u3055\u3044\uff09\u3002<\/p> <hr> <h3>C \/ C++\uff08POSIX\u30bd\u30b1\u30c3\u30c8\uff09<\/h3> <ul> <li><strong>bind\u306e\u5931\u6557\u3092\u63e1\u308a\u3064\u3076\u3055\u306a\u3044<\/strong>\uff1aEADDRNOTAVAIL\/EADDRINUSE\/EACCES\u306a\u3069\u3092\u533a\u5225\u3057\u3066\u30ed\u30b0\u306b\u6b8b\u3059\uff08\u539f\u56e0\u7a76\u660e\u901f\u5ea6\u304c\u5909\u308f\u308a\u307e\u3059\uff09\u3002<\/li> <li><strong>\u30a2\u30c9\u30ec\u30b9\u30d5\u30a1\u30df\u30ea\u306e\u6574\u5408<\/strong>\uff1aIPv4\/IPv6\u3067 <code>sockaddr_in<\/code>\/<code>sockaddr_in6<\/code> \u306e\u6271\u3044\u3092\u6df7\u305c\u306a\u3044\u3002<\/li> <li><strong>SO_REUSEADDR\u7b49\u306e\u610f\u5473\u3092\u8aa4\u89e3\u3057\u306a\u3044<\/strong>\uff1aEADDRNOTAVAIL\u306e\u6839\u672c\u89e3\u6c7a\u306b\u306f\u306a\u3089\u305a\u3001\u5225\u306e\u75c7\u72b6\u3092\u898b\u3048\u306b\u304f\u304f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li> <\/ul> <h3>Java\uff08JVM\u7cfb\uff09<\/h3> <ul> <li><strong>DNS\/\u540d\u524d\u89e3\u6c7a\u3068\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong>\uff1aJVM\u306fDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u65b9\u91dd\u304c\u74b0\u5883\u3067\u5909\u308f\u308a\u5f97\u308b\u305f\u3081\u3001\u5207\u66ff\uff08LB\/\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\uff09\u6642\u306e\u6319\u52d5\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li> <li><strong>IPv6\/IPv4\u306e\u512a\u5148<\/strong>\uff1a\u74b0\u5883\u5dee\u304c\u51fa\u308b\u306a\u3089\u3001JVM\u30aa\u30d7\u30b7\u30e7\u30f3\u3084OS\u5074\u65b9\u91dd\u3067\u201c\u3069\u3061\u3089\u3092\u4f7f\u3046\u304b\u201d\u3092\u7d71\u4e00\u3057\u3001\u534a\u7aef\u306a\u72b6\u614b\u306b\u3057\u306a\u3044\u3002<\/li> <li><strong>HTTP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u63a5\u7d9a\u518d\u5229\u7528<\/strong>\uff1a\u77ed\u547d\u63a5\u7d9a\u304c\u5897\u3048\u308b\u3068\u30dd\u30fc\u30c8\u6d88\u8cbb\u304c\u9032\u3080\u306e\u3067\u3001\u30d7\u30fc\u30eb\uff0fkeep-alive\uff0f\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u660e\u793a\u3057\u3066\u904b\u7528\u3059\u308b\u3002<\/li> <\/ul> <h3>Go<\/h3> <ul> <li><strong>Listen\u306e\u6307\u5b9a<\/strong>\uff1a<code>\":8080\"<\/code> \u306e\u3088\u3046\u306b\u30db\u30b9\u30c8\u90e8\u3092\u7a7a\u306b\u3059\u308b\u3068\u5168IF\u5f85\u53d7\u306b\u306a\u308a\u3001IP\u56fa\u5b9abind\u4e8b\u6545\u3092\u907f\u3051\u3084\u3059\u3044\uff08\u8981\u4ef6\u304c\u7121\u3044\u306a\u3089\u6709\u52b9\uff09\u3002<\/li> <li><strong>Dial\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u8a2d\u8a08<\/strong>\uff1a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306a\u3057\u306e\u518d\u8a66\u884c\u3084\u3001\u30b4\u30eb\u30fc\u30c1\u30f3\u5927\u91cf\u751f\u6210\u3067\u63a5\u7d9a\u8a66\u884c\u304c\u5897\u3048\u308b\u3068\u3001\u77ed\u547d\u63a5\u7d9a\u304c\u5897\u3048\u3066\u72b6\u6cc1\u3092\u60aa\u5316\u3055\u305b\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/li> <li><strong>\u89e3\u6c7a\u7d50\u679c\u306e\u6271\u3044<\/strong>\uff1aLB\u914d\u4e0b\u3067\u306f\u5b9b\u5148\u304c\u5909\u308f\u308b\u524d\u63d0\u306a\u306e\u3067\u3001\u518d\u89e3\u6c7a\u3084\u30ea\u30c8\u30e9\u30a4\u306e\u8a2d\u8a08\u3092\u201c\u5897\u5e45\u3057\u306a\u3044\u5f62\u201d\u306b\u3059\u308b\u3002<\/li> <\/ul> <h3>Python<\/h3> <ul> <li><strong>socket\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u6319\u52d5\u5dee<\/strong>\uff1aIPv4\/IPv6\u306e\u6271\u3044\u306fOS\u8a2d\u5b9a\u3084\u547c\u3073\u51fa\u3057\u65b9\u3067\u5909\u308f\u308b\u305f\u3081\u3001bind\u5148\uff080.0.0.0\/::\uff09\u306e\u610f\u56f3\u3092\u660e\u78ba\u306b\u3059\u308b\u3002<\/li> <li><strong>requests\/urllib\u7cfb\u306e\u518d\u8a66\u884c<\/strong>\uff1a\u518d\u8a66\u884c\u3092\u5b89\u6613\u306b\u5897\u3084\u3059\u3068\u3001\u969c\u5bb3\u6642\u306b\u63a5\u7d9a\u304c\u5897\u3048\u3066\u4e00\u6642\u30dd\u30fc\u30c8\u6d88\u8cbb\u3092\u9032\u3081\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u30d0\u30c3\u30af\u30aa\u30d5\uff0b\u4e0a\u9650\u3092\u8a2d\u8a08\u3059\u308b\u3002<\/li> <li><strong>\u30d7\u30ed\u30bb\u30b9\/\u30b9\u30ec\u30c3\u30c9\u5897\u52a0\u6642\u306e\u526f\u4f5c\u7528<\/strong>\uff1a\u30ef\u30fc\u30ab\u30fc\u6570\u5897\u3067\u77ed\u547d\u63a5\u7d9a\u304c\u5897\u3048\u308b\u3068\u3001connect\u5074\u306e\u554f\u984c\u3092\u8a98\u767a\u3057\u3084\u3059\u3044\u3002<\/li> <\/ul> <h3>Node.js\uff08JavaScript\u30e9\u30f3\u30bf\u30a4\u30e0\uff09<\/h3> <ul> <li><strong>HTTP Agent\u306ekeep-alive<\/strong>\uff1a\u5916\u5411\u304dHTTP\u304c\u591a\u3044\u5834\u5408\u3001keep-alive\u3084\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30d7\u30fc\u30eb\u306e\u6709\u7121\u3067\u77ed\u547d\u63a5\u7d9a\u91cf\u304c\u5927\u304d\u304f\u5909\u308f\u308b\u3002<\/li> <li><strong>dns.lookup\u306e\u6271\u3044<\/strong>\uff1a\u540d\u524d\u89e3\u6c7a\u7d50\u679c\u3084IPv6\/IPv4\u512a\u5148\u304c\u74b0\u5883\u3067\u63fa\u308c\u308b\u3068\u3001\u6210\u529f\/\u5931\u6557\u304c\u4e0d\u5b89\u5b9a\u306b\u306a\u308a\u3084\u3059\u3044\u3002\u74b0\u5883\u5dee\u304c\u3042\u308b\u306a\u3089\u65b9\u91dd\u3092\u7d71\u4e00\u3059\u308b\u3002<\/li> <li><strong>\u969c\u5bb3\u6642\u306e\u5373\u6642\u30ea\u30c8\u30e9\u30a4\u9023\u6253\u3092\u907f\u3051\u308b<\/strong>\uff1a\u30a4\u30d9\u30f3\u30c8\u30eb\u30fc\u30d7\u4e0a\u3067\u9ad8\u983b\u5ea6\u518d\u8a66\u884c\u3059\u308b\u3068\u3001\u72b6\u6cc1\u306e\u5897\u5e45\u304c\u8d77\u304d\u3084\u3059\u3044\u3002<\/li> <\/ul> <h3>Ruby<\/h3> <ul> <li><strong>\u77ed\u547d\u63a5\u7d9a\u306e\u5897\u5e45<\/strong>\uff1a\u5916\u90e8API\u547c\u3073\u51fa\u3057\u3084DB\u63a5\u7d9a\u3092\u90fd\u5ea6\u5f35\u308a\u76f4\u3059\u8a2d\u8a08\u306f\u3001\u969c\u5bb3\u6642\u306b\u63a5\u7d9a\u8a66\u884c\u304c\u5897\u3048\u3066\u30dd\u30fc\u30c8\u6d88\u8cbb\u3092\u9032\u3081\u3084\u3059\u3044\u3002\u30d7\u30fc\u30eb\u30fb\u518d\u5229\u7528\u3092\u691c\u8a0e\u3059\u308b\u3002<\/li> <li><strong>IPv6\/IPv4\u5dee<\/strong>\uff1aOS\u8a2d\u5b9a\u3068\u30a2\u30d7\u30ea\u306e\u524d\u63d0\u304c\u30ba\u30ec\u308b\u3068\u3001\u74b0\u5883\u3054\u3068\u306e\u5dee\u304c\u51fa\u308b\u3002\u904b\u7528\u65b9\u91dd\u3092\u6c7a\u3081\u3066\u63c3\u3048\u308b\u3002<\/li> <\/ul> <h3>PHP<\/h3> <ul> <li><strong>FPM\u30ef\u30fc\u30ab\u30fc\u5897\u306b\u3088\u308b\u5916\u5411\u304d\u63a5\u7d9a\u5897<\/strong>\uff1a\u30ef\u30fc\u30ab\u30fc\u6570\u5897\uff1d\u540c\u6642\u5916\u5411\u304d\u63a5\u7d9a\u304c\u5897\u3048\u3001\u77ed\u547d\u63a5\u7d9a\u304c\u591a\u3044\u3068\u4e00\u6642\u30dd\u30fc\u30c8\u6d88\u8cbb\u304c\u9032\u307f\u3084\u3059\u3044\u3002<\/li> <li><strong>\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\/\u518d\u8a66\u884c\u306e\u8a2d\u8a08<\/strong>\uff1a\u5916\u90e8API\u969c\u5bb3\u6642\u306b\u518d\u8a66\u884c\u304c\u5897\u3048\u308b\u3068\u3001\u72b6\u6cc1\u3092\u60aa\u5316\u3055\u305b\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u4e0a\u9650\u3068\u30d0\u30c3\u30af\u30aa\u30d5\u304c\u91cd\u8981\u3002<\/li> <\/ul> <h3>.NET\uff08C#\u306a\u3069\uff09<\/h3> <ul> <li><strong>HttpClient\u306e\u4f7f\u3044\u65b9<\/strong>\uff1a\u77ed\u547d\u306b\u751f\u6210\u30fb\u7834\u68c4\u3092\u7e70\u308a\u8fd4\u3059\u3068\u3001\u63a5\u7d9a\u518d\u5229\u7528\u304c\u52b9\u304b\u305a\u77ed\u547d\u63a5\u7d9a\u304c\u5897\u3048\u3084\u3059\u3044\u3002\u518d\u5229\u7528\u524d\u63d0\u306e\u8a2d\u8a08\u306b\u5bc4\u305b\u308b\u3002<\/li> <li><strong>DNS\/\u5207\u66ff\u306e\u6271\u3044<\/strong>\uff1aLB\u914d\u4e0b\u3067\u5b9b\u5148\u304c\u5909\u308f\u308b\u5834\u5408\u3001\u540d\u524d\u89e3\u6c7a\u3084\u63a5\u7d9a\u518d\u5229\u7528\u306e\u6319\u52d5\u304c\u969c\u5bb3\u6642\u306e\u201c\u63fa\u308c\u201d\u306b\u3064\u306a\u304c\u308b\u3053\u3068\u304c\u3042\u308b\u305f\u3081\u3001\u691c\u8a3c\u3068\u76e3\u8996\u304c\u5fc5\u8981\u3002<\/li> <\/ul> <hr> <p>\u4ed8\u9332\u306e\u7d50\u8ad6\u3082\u3001\u7b2c10\u7ae0\u3068\u540c\u3058\u3067\u3059\u3002\u8a00\u8a9e\u304c\u9055\u3063\u3066\u3082\u3001\u7d50\u5c40\u306f\u300c\u6307\u5b9a\u306f\u5951\u7d04\u300d\u300c\u5951\u7d04\u304c\u7121\u3044\u306a\u3089\u524d\u63d0\u306b\u3057\u306a\u3044\u300d\u306b\u5e30\u7d50\u3057\u307e\u3059\u3002\u74b0\u5883\uff08RHEL\u3001NetworkManager\u3001\u30b3\u30f3\u30c6\u30ca\u3001\u30af\u30e9\u30b9\u30bf\u3001\u7d4c\u8def\u5236\u5fa1\u3001IPv6\u65b9\u91dd\uff09\u3068\u30a2\u30d7\u30ea\u306e\u6307\u5b9a\u304c\u885d\u7a81\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u4e00\u822c\u8ad6\u306e\u8a2d\u5b9a\u30e1\u30e2\u3060\u3051\u3067\u306f\u9650\u754c\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u300c\u3046\u3061\u306e\u69cb\u6210\u3060\u3068\u3001\u3069\u3053\u3092\u56fa\u5b9a\u3057\u3001\u3069\u3053\u3092\u6368\u3066\u308b\u306e\u304c\u5b89\u5168\u304b\u300d\u300c\u518d\u767a\u3057\u306a\u3044\u76e3\u8996\u30fb\u624b\u9806\u30fb\u8a2d\u8a08\u66f8\u307e\u3067\u542b\u3081\u3066\u6574\u3048\u305f\u3044\u300d\u3068\u3044\u3063\u305f\u500b\u5225\u6848\u4ef6\u306e\u6574\u7406\u304c\u5fc5\u8981\u306a\u3089\u3001<strong>\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240<\/strong>\u3078\u306e\u76f8\u8ac7\u30fb\u4f9d\u983c\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\uff1ahttps:\/\/jouhou.main.jp\/?page_id=26983 \uff0f\u96fb\u8a71\uff1a0120-838-831\uff09\u3002<\/p> \r\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-47013206 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"47013206\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-74ca1fb6\" data-id=\"74ca1fb6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-73f62daa elementor-widget elementor-widget-text-editor\" data-id=\"73f62daa\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<style>h1.dai {    display: inline-block;    font-weight: bold;    border-left: solid 5px #38b3f2;    border-bottom: solid 1px #38b3f2;    margin-top: 25px; \/* \u4e0a\u306e\u7a7a\u767d\u30922\u500d *\/    margin-bottom: 5px;    padding: 5px 5px 5px 5px;    font-size: 18px; \/* \u6587\u5b57\u306e\u5927\u304d\u3055\u309218px\u306b\u8a2d\u5b9a *\/}h2.fukudai {    display: inline-block;    font-weight: bold;    border-left: solid 5px #38b3f2;    border-bottom: solid 1px #38b3f2;    margin-top: 25px; \/* \u4e0a\u306e\u7a7a\u767d\u30922\u500d *\/    margin-bottom: 5px;    padding: 5px 5px 5px 5px;    font-size: 18px; \/* \u6587\u5b57\u306e\u5927\u304d\u3055\u309218px\u306b\u8a2d\u5b9a *\/}.fukudai {    display: inline-block;    font-weight: bold;    border-left: solid 5px #38b3f2;    border-bottom: solid 1px #38b3f2;    margin: 0 auto 50px;    padding: 5px 5px 5px 5px;    font-size: 18px; \/* \u6587\u5b57\u306e\u5927\u304d\u3055\u309218px\u306b\u8a2d\u5b9a *\/}.fukudai {    display: inline-block;    font-weight: bold;    border-left: solid 5px #38b3f2;    border-bottom: solid 1px #38b3f2;    margin: 0 auto 50px;    padding: 5px 5px 5px 5px;    font-size: 18px; \/* \u6587\u5b57\u306e\u5927\u304d\u3055\u309218px\u306b\u8a2d\u5b9a *\/}<\/style><h2 class='fukudai'>\u306f\u3058\u3081\u306b<\/h2><br><p>     Red Hat\u3084Linux\u74b0\u5883\u306b\u304a\u3044\u3066\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u95a2\u9023\u306e\u30c8\u30e9\u30d6\u30eb\u304c\u767a\u751f\u3057\u305f\u969b\u3001\u300cEADDRNOTAVAIL (99)\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u306b\u906d\u9047\u3059\u308b\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u3084\u30dd\u30fc\u30c8\u304c\u5229\u7528\u3067\u304d\u306a\u3044\u72b6\u614b\u3092\u793a\u3057\u3066\u304a\u308a\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u901a\u4fe1\u3084\u30b5\u30fc\u30d3\u30b9\u306e\u6b63\u5e38\u306a\u52d5\u4f5c\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002IT\u7ba1\u7406\u8005\u3084\u30b7\u30b9\u30c6\u30e0\u904b\u7528\u8005\u306b\u3068\u3063\u3066\u3001\u539f\u56e0\u306e\u7279\u5b9a\u3084\u9069\u5207\u306a\u5bfe\u51e6\u306f\u91cd\u8981\u306a\u8ab2\u984c\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u3053\u306e\u30a8\u30e9\u30fc\u306e\u57fa\u672c\u7684\u306a\u5b9a\u7fa9\u3084\u539f\u56e0\u306e\u6982\u8981\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u3001\u5b9f\u969b\u306b\u767a\u751f\u3057\u305f\u4e8b\u4f8b\u3084\u5bfe\u5fdc\u7b56\u306b\u3064\u3044\u3066\u3082\u8a73\u3057\u304f\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5b9a\u904b\u7528\u3092\u7dad\u6301\u3057\u3001\u30c8\u30e9\u30d6\u30eb\u3092\u672a\u7136\u306b\u9632\u3050\u305f\u3081\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u62bc\u3055\u3048\u3001\u5b89\u5fc3\u3057\u3066\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u3092\u884c\u3046\u305f\u3081\u306e\u53c2\u8003\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p><br><br><p>EADDRNOTAVAIL (99)\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3084\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u306b\u304a\u3044\u3066\u983b\u7e41\u306b\u906d\u9047\u3059\u308b\u30a8\u30e9\u30fc\u306e\u4e00\u3064\u3067\u3059\u3002\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u6307\u5b9a\u3055\u308c\u305fIP\u30a2\u30c9\u30ec\u30b9\u3084\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u5272\u308a\u5f53\u3066\u3089\u308c\u306a\u3044\u72b6\u614b\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u30ea\u30af\u30a8\u30b9\u30c8\u3055\u308c\u305f\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3067\u304d\u306a\u3044\u3001\u3082\u3057\u304f\u306f\u3059\u3067\u306b\u4f7f\u7528\u4e2d\u3067\u3042\u308b\u305f\u3081\u306b\u65b0\u305f\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u306a\u3044\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u306e\u7af6\u5408\u3084\u8a2d\u5b9a\u30df\u30b9\u3001\u307e\u305f\u306f\u30b7\u30b9\u30c6\u30e0\u306e\u30ea\u30bd\u30fc\u30b9\u4e0d\u8db3\u306b\u8d77\u56e0\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002 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(99)\u300d\u30a8\u30e9\u30fc\u306e\u767a\u751f\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5b9a\u904b\u7528\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p><br><br><p>\u30a8\u30e9\u30fc\u89e3\u6c7a\u306e\u305f\u3081\u306e\u5177\u4f53\u7684\u306a\u624b\u9806\u3068\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u72b6\u614b\u3092\u6b63\u78ba\u306b\u628a\u63e1\u3057\u3001\u554f\u984c\u306e\u6839\u672c\u539f\u56e0\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001\u4f7f\u7528\u4e2d\u306eIP\u30a2\u30c9\u30ec\u30b9\u3084\u30dd\u30fc\u30c8\u306e\u72b6\u6cc1\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001Linux\u74b0\u5883\u3067\u306f\u300cnetstat\u300d\u3084\u300css\u300d\u30b3\u30de\u30f3\u30c9\u3092\u6d3b\u7528\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30b3\u30de\u30f3\u30c9\u306f\u3001\u73fe\u5728\u306e\u901a\u4fe1\u72b6\u6cc1\u3084\u30dd\u30fc\u30c8\u306e\u4f7f\u7528\u72b6\u6cc1\u3092\u4e00\u89a7\u8868\u793a\u3057\u3001\u91cd\u8907\u3084\u7af6\u5408\u306e\u6709\u7121\u3092\u660e\u78ba\u306b\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u300cip 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