{"id":1190,"date":"2020-05-06T01:21:15","date_gmt":"2020-05-05T17:21:15","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1190"},"modified":"2020-05-06T01:21:15","modified_gmt":"2020-05-05T17:21:15","slug":"lvs-%e8%b4%9f%e8%bd%bd%e5%9d%87%e8%a1%a1-nat-tun-dr-%e8%b0%83%e5%ba%a6%e7%ae%97%e6%b3%95-%e6%bd%8d%e9%b2%b8-%e6%bd%8d%e9%b2%b8%e7%a7%91%e6%8a%80","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1190","title":{"rendered":"Linux\u670d\u52a1\u5668\u96c6\u7fa4\u7cfb\u7edf-LVS\u4ecb\u7ecd"},"content":{"rendered":"<p><strong>LVS\u4ecb\u7ecd<\/strong><br \/>\n\u9488\u5bf9\u9ad8\u53ef\u4f38\u7f29\u3001\u9ad8\u53ef\u7528\u7f51\u7edc\u670d\u52a1\u7684\u9700\u6c42\uff0cLVS\u7ed9\u51fa\u4e86\u57fa\u4e8eIP\u5c42\u548c\u57fa\u4e8e\u5185\u5bb9\u8bf7\u6c42\u5206\u53d1\u7684\u8d1f\u8f7d\u5e73\u8861\u8c03\u5ea6\u89e3\u51b3\u65b9\u6cd5\uff0c\u5e76\u5728Linux\u5185\u6838\u4e2d\u5b9e\u73b0\u4e86\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5c06\u4e00\u7ec4\u670d\u52a1\u5668\u6784\u6210\u4e00\u4e2a\u5b9e\u73b0\u53ef\u4f38\u7f29\u7684\u3001\u9ad8\u53ef\u7528\u7f51\u7edc\u670d\u52a1\u7684\u865a\u62df\u670d\u52a1\u5668\u3002<br \/>\n\u865a\u62df\u670d\u52a1\u5668\u7684\u4f53\u7cfb\u7ed3\u6784\u4e2d\uff0c\u4e00\u7ec4\u670d\u52a1\u5668\u901a\u8fc7\u9ad8\u901f\u7684\u5c40\u57df\u7f51\u6216\u8005\u5730\u7406\u5206\u5e03\u7684\u5e7f\u57df\u7f51\u76f8\u4e92\u8fde\u63a5\uff0c\u5728\u5b83\u4eec\u7684\u524d\u7aef\u6709\u4e00\u4e2a\u8d1f\u8f7d\u8c03\u5ea6\u5668\uff08Load Balancer\uff09\u3002\u8d1f\u8f7d\u8c03\u5ea6\u5668\u80fd\u65e0\u7f1d\u5730\u5c06\u7f51\u7edc\u8bf7\u6c42\u8c03\u5ea6\u5230\u771f\u5b9e\u670d\u52a1\u5668\u4e0a\uff0c\u4ece\u800c\u4f7f\u5f97\u670d\u52a1\u5668\u96c6\u7fa4\u7684\u7ed3\u6784\u5bf9\u5ba2\u6237\u662f\u900f\u660e\u7684\uff0c\u5ba2\u6237\u8bbf\u95ee\u96c6\u7fa4\u7cfb\u7edf\u63d0\u4f9b\u7684\u7f51\u7edc\u670d\u52a1\u5c31\u50cf\u8bbf \u95ee\u4e00\u53f0\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u7528\u7684\u670d\u52a1\u5668\u4e00\u6837\u3002\u5ba2\u6237\u7a0b\u5e8f\u4e0d\u53d7\u670d\u52a1\u5668\u96c6\u7fa4\u7684\u5f71\u54cd\u4e0d\u9700\u4f5c\u4efb\u4f55\u4fee\u6539\u3002\u7cfb\u7edf\u7684\u4f38\u7f29\u6027\u901a\u8fc7\u5728\u670d\u52a1\u673a\u7fa4\u4e2d\u900f\u660e\u5730\u52a0\u5165\u548c\u5220\u9664\u4e00\u4e2a\u8282\u70b9\u6765\u8fbe\u5230\uff0c\u901a\u8fc7\u68c0 \u6d4b\u8282\u70b9\u6216\u670d\u52a1\u8fdb\u7a0b\u6545\u969c\u548c\u6b63\u786e\u5730\u91cd\u7f6e\u7cfb\u7edf\u8fbe\u5230\u9ad8\u53ef\u7528\u6027\u3002\u7531\u4e8e\u6211\u4eec\u7684\u8d1f\u8f7d\u8c03\u5ea6\u6280\u672f\u662f\u5728Linux\u5185\u6838\u4e2d\u5b9e\u73b0\u7684\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3aLinux\u865a\u62df\u670d\u52a1\u5668\uff08Linux Virtual Server\uff09\u3002<br \/>\n\u57281998\u5e745\u6708\uff0c\u6210\u7acb\u4e86Linux Virtual Server\u7684\u81ea\u7531\u8f6f\u4ef6\u9879\u76ee\uff0c\u8fdb\u884cLinux\u670d\u52a1\u5668\u96c6\u7fa4\u7684\u5f00\u53d1\u5de5\u4f5c\u3002\u540c\u65f6\uff0cLinux Virtual Server\u9879\u76ee\u662f\u56fd\u5185\u6700\u65e9\u51fa\u73b0\u7684\u81ea\u7531\u8f6f\u4ef6\u9879\u76ee\u4e4b\u4e00\u3002<br \/>\nLinux Virtual Server\u9879\u76ee\u7684\u76ee\u6807 \uff1a\u4f7f\u7528\u96c6\u7fa4\u6280\u672f\u548cLinux\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u73b0\u4e00\u4e2a\u9ad8\u6027\u80fd\u3001\u9ad8\u53ef\u7528\u7684\u670d\u52a1\u5668\uff0c\u5b83\u5177\u6709\u5f88\u597d\u7684\u53ef\u4f38\u7f29\u6027\uff08Scalability\uff09\u3001\u53ef\u9760\u6027\uff08Reliability\uff09\u548c\u53ef\u7ba1\u7406\u6027\uff08Manageability\uff09\u3002<br \/>\n\u76ee\u524d\uff0cLVS\u9879\u76ee\u5df2\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5b9e\u73b0\u53ef\u4f38\u7f29\u7f51\u7edc\u670d\u52a1\u7684Linux Virtual Server\u6846\u67b6\u3002\u5728LVS\u6846\u67b6\u4e2d\uff0c\u63d0\u4f9b\u4e86\u542b\u6709\u4e09\u79cdIP\u8d1f\u8f7d\u5747\u8861\u6280\u672f\u7684IP\u865a\u62df\u670d\u52a1\u5668\u8f6f\u4ef6IPVS\u3001\u57fa\u4e8e\u5185\u5bb9\u8bf7\u6c42\u5206\u53d1\u7684\u5185\u6838Layer-7\u4ea4 \u6362\u673aKTCPVS\u548c\u96c6\u7fa4\u7ba1\u7406\u8f6f\u4ef6\u3002\u53ef\u4ee5\u5229\u7528LVS\u6846\u67b6\u5b9e\u73b0\u9ad8\u53ef\u4f38\u7f29\u7684\u3001\u9ad8\u53ef\u7528\u7684Web\u3001Cache\u3001Mail\u548cMedia\u7b49\u7f51\u7edc\u670d\u52a1\uff1b\u5728\u6b64\u57fa\u7840\u4e0a\uff0c\u53ef\u4ee5\u5f00 \u53d1\u652f\u6301\u5e9e\u5927\u7528\u6237\u6570\u7684\u3001\u9ad8\u53ef\u4f38\u7f29\u7684\u3001\u9ad8\u53ef\u7528\u7684\u7535\u5b50\u5546\u52a1\u5e94\u7528\u3002<br \/>\n<strong><span class=\\\"atitle3\\\">IP\u865a\u62df\u670d\u52a1\u5668\u8f6f\u4ef6IPVS<\/span><\/strong><br \/>\n\u5728\u8c03\u5ea6\u5668\u7684\u5b9e\u73b0\u6280\u672f\u4e2d\uff0cIP\u8d1f\u8f7d\u5747\u8861\u6280\u672f\u662f\u6548\u7387\u6700\u9ad8\u7684\u3002\u5728\u5df2\u6709\u7684IP\u8d1f\u8f7d\u5747\u8861\u6280\u672f\u4e2d\u6709\u901a\u8fc7\u7f51\u7edc\u5730\u5740\u8f6c\u6362\uff08Network Address Translation\uff09\u5c06\u4e00\u7ec4\u670d\u52a1\u5668\u6784\u6210\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684\u3001\u9ad8\u53ef\u7528\u7684\u865a\u62df\u670d\u52a1\u5668\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3aVS\/NAT\u6280\u672f\uff08Virtual Server via Network Address Translation\uff09\uff0c\u5927\u591a\u6570\u5546\u54c1\u5316\u7684IP\u8d1f\u8f7d\u5747\u8861\u8c03\u5ea6\u5668\u4ea7\u54c1\u90fd\u662f\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u5982Cisco\u7684LocalDirector\u3001F5\u7684Big\/IP\u548c Alteon\u7684ACEDirector\u3002\u5728\u5206\u6790VS\/NAT\u7684\u7f3a\u70b9\u548c\u7f51\u7edc\u670d\u52a1\u7684\u975e\u5bf9\u79f0\u6027\u7684\u57fa\u7840\u4e0a\uff0c\u6211\u4eec\u63d0\u51fa\u901a\u8fc7IP\u96a7\u9053\u5b9e\u73b0\u865a\u62df\u670d\u52a1\u5668\u7684\u65b9\u6cd5VS\/TUN \uff08Virtual Server via IP Tunneling\uff09\uff0c\u548c\u901a\u8fc7\u76f4\u63a5\u8def\u7531\u5b9e\u73b0\u865a\u62df\u670d\u52a1\u5668\u7684\u65b9\u6cd5VS\/DR\uff08Virtual Server via Direct Routing\uff09\uff0c\u5b83\u4eec\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u7cfb\u7edf\u7684\u4f38\u7f29\u6027\u3002\u6240\u4ee5\uff0cIPVS\u8f6f\u4ef6\u5b9e\u73b0\u4e86\u8fd9\u4e09\u79cdIP\u8d1f\u8f7d\u5747\u8861\u6280\u672f\uff0c\u5b83\u4eec\u7684\u5927\u81f4\u539f\u7406\u5982\u4e0b\uff08\u6211\u4eec\u5c06\u5728\u5176\u4ed6\u7ae0\u8282\u5bf9\u5176\u5de5\u4f5c\u539f \u7406\u8fdb\u884c\u8be6\u7ec6\u63cf\u8ff0\uff09\uff0c<\/p>\n<ol>\n<li><b>Virtual Server via Network Address Translation\uff08VS\/NAT\uff09<\/b><br \/>\n\u901a\u8fc7\u7f51\u7edc\u5730\u5740\u8f6c\u6362\uff0c\u8c03\u5ea6\u5668\u91cd\u5199\u8bf7\u6c42\u62a5\u6587\u7684\u76ee\u6807\u5730\u5740\uff0c\u6839\u636e\u9884\u8bbe\u7684\u8c03\u5ea6\u7b97\u6cd5\uff0c\u5c06\u8bf7\u6c42\u5206\u6d3e\u7ed9\u540e\u7aef\u7684\u771f\u5b9e\u670d\u52a1\u5668\uff1b\u771f\u5b9e\u670d\u52a1\u5668\u7684\u54cd\u5e94\u62a5\u6587\u901a\u8fc7\u8c03\u5ea6\u5668\u65f6\uff0c\u62a5\u6587\u7684\u6e90\u5730\u5740\u88ab\u91cd\u5199\uff0c\u518d\u8fd4\u56de\u7ed9\u5ba2\u6237\uff0c\u5b8c\u6210\u6574\u4e2a\u8d1f\u8f7d\u8c03\u5ea6\u8fc7\u7a0b\u3002<\/li>\n<li><b>Virtual Server via IP Tunneling\uff08VS\/TUN\uff09<\/b><br \/>\n\u91c7\u7528NAT\u6280\u672f\u65f6\uff0c\u7531\u4e8e\u8bf7\u6c42\u548c\u54cd\u5e94\u62a5\u6587\u90fd\u5fc5\u987b\u7ecf\u8fc7\u8c03\u5ea6\u5668\u5730\u5740\u91cd\u5199\uff0c\u5f53\u5ba2\u6237\u8bf7\u6c42\u8d8a\u6765\u8d8a\u591a\u65f6\uff0c\u8c03\u5ea6\u5668\u7684\u5904\u7406\u80fd\u529b\u5c06\u6210\u4e3a\u74f6\u9888\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u8c03\u5ea6\u5668\u628a\u8bf7\u6c42\u62a5 \u6587\u901a\u8fc7IP\u96a7\u9053\u8f6c\u53d1\u81f3\u771f\u5b9e\u670d\u52a1\u5668\uff0c\u800c\u771f\u5b9e\u670d\u52a1\u5668\u5c06\u54cd\u5e94\u76f4\u63a5\u8fd4\u56de\u7ed9\u5ba2\u6237\uff0c\u6240\u4ee5\u8c03\u5ea6\u5668\u53ea\u5904\u7406\u8bf7\u6c42\u62a5\u6587\u3002\u7531\u4e8e\u4e00\u822c\u7f51\u7edc\u670d\u52a1\u5e94\u7b54\u6bd4\u8bf7\u6c42\u62a5\u6587\u5927\u8bb8\u591a\uff0c\u91c7\u7528 VS\/TUN\u6280\u672f\u540e\uff0c\u96c6\u7fa4\u7cfb\u7edf\u7684\u6700\u5927\u541e\u5410\u91cf\u53ef\u4ee5\u63d0\u9ad810\u500d\u3002<\/li>\n<li><b>Virtual Server via Direct Routing\uff08VS\/DR\uff09<\/b><br \/>\nVS\/DR\u901a\u8fc7\u6539\u5199\u8bf7\u6c42\u62a5\u6587\u7684MAC\u5730\u5740\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u771f\u5b9e\u670d\u52a1\u5668\uff0c\u800c\u771f\u5b9e\u670d\u52a1\u5668\u5c06\u54cd\u5e94\u76f4\u63a5\u8fd4\u56de\u7ed9\u5ba2\u6237\u3002\u540cVS\/TUN\u6280\u672f\u4e00\u6837\uff0cVS\/DR\u6280\u672f\u53ef\u6781\u5927\u5730 \u63d0\u9ad8\u96c6\u7fa4\u7cfb\u7edf\u7684\u4f38\u7f29\u6027\u3002\u8fd9\u79cd\u65b9\u6cd5\u6ca1\u6709IP\u96a7\u9053\u7684\u5f00\u9500\uff0c\u5bf9\u96c6\u7fa4\u4e2d\u7684\u771f\u5b9e\u670d\u52a1\u5668\u4e5f\u6ca1\u6709\u5fc5\u987b\u652f\u6301IP\u96a7\u9053\u534f\u8bae\u7684\u8981\u6c42\uff0c\u4f46\u662f\u8981\u6c42\u8c03\u5ea6\u5668\u4e0e\u771f\u5b9e\u670d\u52a1\u5668\u90fd\u6709\u4e00\u5757\u7f51\u5361\u8fde \u5728\u540c\u4e00\u7269\u7406\u7f51\u6bb5\u4e0a\u3002<\/li>\n<\/ol>\n<p>\u9488\u5bf9\u4e0d\u540c\u7684\u7f51\u7edc\u670d\u52a1\u9700\u6c42\u548c\u670d\u52a1\u5668\u914d\u7f6e\uff0cIPVS\u8c03\u5ea6\u5668\u5b9e\u73b0\u4e86\u5982\u4e0b\u516b\u79cd\u8d1f\u8f7d\u8c03\u5ea6\u7b97\u6cd5\uff1a<\/p>\n<ol>\n<li><b>\u8f6e\u53eb\uff08Round Robin\uff09<\/b><br \/>\n\u8c03\u5ea6\u5668\u901a\u8fc7\\&#8221;\u8f6e\u53eb\\&#8221;\u8c03\u5ea6\u7b97\u6cd5\u5c06\u5916\u90e8\u8bf7\u6c42\u6309\u987a\u5e8f\u8f6e\u6d41\u5206\u914d\u5230\u96c6\u7fa4\u4e2d\u7684\u771f\u5b9e\u670d\u52a1\u5668\u4e0a\uff0c\u5b83\u5747\u7b49\u5730\u5bf9\u5f85\u6bcf\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u800c\u4e0d\u7ba1\u670d\u52a1\u5668\u4e0a\u5b9e\u9645\u7684\u8fde\u63a5\u6570\u548c\u7cfb\u7edf\u8d1f\u8f7d\u3002<\/li>\n<li><b>\u52a0\u6743\u8f6e\u53eb\uff08Weighted Round Robin\uff09<\/b><br \/>\n\u8c03\u5ea6\u5668\u901a\u8fc7\\&#8221;\u52a0\u6743\u8f6e\u53eb\\&#8221;\u8c03\u5ea6\u7b97\u6cd5\u6839\u636e\u771f\u5b9e\u670d\u52a1\u5668\u7684\u4e0d\u540c\u5904\u7406\u80fd\u529b\u6765\u8c03\u5ea6\u8bbf\u95ee\u8bf7\u6c42\u3002\u8fd9\u6837\u53ef\u4ee5\u4fdd\u8bc1\u5904\u7406\u80fd\u529b\u5f3a\u7684\u670d\u52a1\u5668\u5904\u7406\u66f4\u591a\u7684\u8bbf\u95ee\u6d41\u91cf\u3002\u8c03\u5ea6\u5668\u53ef\u4ee5\u81ea\u52a8\u95ee\u8be2\u771f\u5b9e\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\u60c5\u51b5\uff0c\u5e76\u52a8\u6001\u5730\u8c03\u6574\u5176\u6743\u503c\u3002<\/li>\n<li><b>\u6700\u5c11\u94fe\u63a5\uff08Least Connections\uff09<\/b><br \/>\n\u8c03\u5ea6\u5668\u901a\u8fc7\\&#8221;\u6700\u5c11\u8fde\u63a5\\&#8221;\u8c03\u5ea6\u7b97\u6cd5\u52a8\u6001\u5730\u5c06\u7f51\u7edc\u8bf7\u6c42\u8c03\u5ea6\u5230\u5df2\u5efa\u7acb\u7684\u94fe\u63a5\u6570\u6700\u5c11\u7684\u670d\u52a1\u5668\u4e0a\u3002\u5982\u679c\u96c6\u7fa4\u7cfb\u7edf\u7684\u771f\u5b9e\u670d\u52a1\u5668\u5177\u6709\u76f8\u8fd1\u7684\u7cfb\u7edf\u6027\u80fd\uff0c\u91c7\u7528\\&#8221;\u6700\u5c0f\u8fde\u63a5\\&#8221;\u8c03\u5ea6\u7b97\u6cd5\u53ef\u4ee5\u8f83\u597d\u5730\u5747\u8861\u8d1f\u8f7d\u3002<\/li>\n<li><b>\u52a0\u6743\u6700\u5c11\u94fe\u63a5\uff08Weighted Least Connections\uff09<\/b><br \/>\n\u5728\u96c6\u7fa4\u7cfb\u7edf\u4e2d\u7684\u670d\u52a1\u5668\u6027\u80fd\u5dee\u5f02\u8f83\u5927\u7684\u60c5\u51b5\u4e0b\uff0c\u8c03\u5ea6\u5668\u91c7\u7528\\&#8221;\u52a0\u6743\u6700\u5c11\u94fe\u63a5\\&#8221;\u8c03\u5ea6\u7b97\u6cd5\u4f18\u5316\u8d1f\u8f7d\u5747\u8861\u6027\u80fd\uff0c\u5177\u6709\u8f83\u9ad8\u6743\u503c\u7684\u670d\u52a1\u5668\u5c06\u627f\u53d7\u8f83\u5927\u6bd4\u4f8b\u7684\u6d3b\u52a8\u8fde\u63a5\u8d1f\u8f7d\u3002\u8c03\u5ea6\u5668\u53ef\u4ee5\u81ea\u52a8\u95ee\u8be2\u771f\u5b9e\u670d\u52a1\u5668\u7684\u8d1f\u8f7d\u60c5\u51b5\uff0c\u5e76\u52a8\u6001\u5730\u8c03\u6574\u5176\u6743\u503c\u3002<\/li>\n<li><b>\u57fa\u4e8e\u5c40\u90e8\u6027\u7684\u6700\u5c11\u94fe\u63a5\uff08Locality-Based Least Connections\uff09<\/b><br \/>\n\\&#8221;\u57fa\u4e8e\u5c40\u90e8\u6027\u7684\u6700\u5c11\u94fe\u63a5\\&#8221; \u8c03\u5ea6\u7b97\u6cd5\u662f\u9488\u5bf9\u76ee\u6807IP\u5730\u5740\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u76ee\u524d\u4e3b\u8981\u7528\u4e8eCache\u96c6\u7fa4\u7cfb\u7edf\u3002\u8be5\u7b97\u6cd5\u6839\u636e\u8bf7\u6c42\u7684\u76ee\u6807IP\u5730\u5740\u627e\u51fa\u8be5\u76ee\u6807IP\u5730\u5740\u6700\u8fd1\u4f7f\u7528\u7684\u670d\u52a1\u5668\uff0c\u82e5\u8be5\u670d\u52a1\u5668 \u662f\u53ef\u7528\u7684\u4e14\u6ca1\u6709\u8d85\u8f7d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\uff1b\u82e5\u670d\u52a1\u5668\u4e0d\u5b58\u5728\uff0c\u6216\u8005\u8be5\u670d\u52a1\u5668\u8d85\u8f7d\u4e14\u6709\u670d\u52a1\u5668\u5904\u4e8e\u4e00\u534a\u7684\u5de5\u4f5c\u8d1f\u8f7d\uff0c\u5219\u7528\\&#8221;\u6700\u5c11\u94fe\u63a5\\&#8221;\u7684\u539f\u5219\u9009\u51fa\u4e00\u4e2a\u53ef\u7528\u7684\u670d\u52a1 \u5668\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\u3002<\/li>\n<li><b>\u5e26\u590d\u5236\u7684\u57fa\u4e8e\u5c40\u90e8\u6027\u6700\u5c11\u94fe\u63a5\uff08Locality-Based Least Connections with Replication\uff09<\/b><br \/>\n\\&#8221;\u5e26\u590d\u5236\u7684\u57fa\u4e8e\u5c40\u90e8\u6027\u6700\u5c11\u94fe\u63a5\\&#8221;\u8c03\u5ea6\u7b97\u6cd5\u4e5f\u662f\u9488\u5bf9\u76ee\u6807IP\u5730\u5740\u7684\u8d1f\u8f7d\u5747\u8861\uff0c\u76ee\u524d\u4e3b\u8981\u7528\u4e8eCache\u96c6\u7fa4\u7cfb\u7edf\u3002\u5b83\u4e0eLBLC\u7b97\u6cd5\u7684\u4e0d\u540c\u4e4b\u5904\u662f\u5b83\u8981\u7ef4\u62a4\u4ece\u4e00\u4e2a \u76ee\u6807IP\u5730\u5740\u5230\u4e00\u7ec4\u670d\u52a1\u5668\u7684\u6620\u5c04\uff0c\u800cLBLC\u7b97\u6cd5\u7ef4\u62a4\u4ece\u4e00\u4e2a\u76ee\u6807IP\u5730\u5740\u5230\u4e00\u53f0\u670d\u52a1\u5668\u7684\u6620\u5c04\u3002\u8be5\u7b97\u6cd5\u6839\u636e\u8bf7\u6c42\u7684\u76ee\u6807IP\u5730\u5740\u627e\u51fa\u8be5\u76ee\u6807IP\u5730\u5740\u5bf9\u5e94\u7684\u670d\u52a1 \u5668\u7ec4\uff0c\u6309\\&#8221;\u6700\u5c0f\u8fde\u63a5\\&#8221;\u539f\u5219\u4ece\u670d\u52a1\u5668\u7ec4\u4e2d\u9009\u51fa\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u82e5\u670d\u52a1\u5668\u6ca1\u6709\u8d85\u8f7d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\uff0c\u82e5\u670d\u52a1\u5668\u8d85\u8f7d\uff1b\u5219\u6309\\&#8221;\u6700\u5c0f\u8fde\u63a5\\&#8221;\u539f\u5219\u4ece\u8fd9\u4e2a\u96c6\u7fa4\u4e2d\u9009\u51fa\u4e00 \u53f0\u670d\u52a1\u5668\uff0c\u5c06\u8be5\u670d\u52a1\u5668\u52a0\u5165\u5230\u670d\u52a1\u5668\u7ec4\u4e2d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\u3002\u540c\u65f6\uff0c\u5f53\u8be5\u670d\u52a1\u5668\u7ec4\u6709\u4e00\u6bb5\u65f6\u95f4\u6ca1\u6709\u88ab\u4fee\u6539\uff0c\u5c06\u6700\u5fd9\u7684\u670d\u52a1\u5668\u4ece\u670d\u52a1\u5668\u7ec4\u4e2d\u5220\u9664\uff0c\u4ee5\u964d\u4f4e\u590d\u5236\u7684 \u7a0b\u5ea6\u3002<\/li>\n<li><b>\u76ee\u6807\u5730\u5740\u6563\u5217\uff08Destination Hashing\uff09<\/b><br \/>\n\\&#8221;\u76ee\u6807\u5730\u5740\u6563\u5217\\&#8221;\u8c03\u5ea6\u7b97\u6cd5\u6839\u636e\u8bf7\u6c42\u7684\u76ee\u6807IP\u5730\u5740\uff0c\u4f5c\u4e3a\u6563\u5217\u952e\uff08Hash Key\uff09\u4ece\u9759\u6001\u5206\u914d\u7684\u6563\u5217\u8868\u627e\u51fa\u5bf9\u5e94\u7684\u670d\u52a1\u5668\uff0c\u82e5\u8be5\u670d\u52a1\u5668\u662f\u53ef\u7528\u7684\u4e14\u672a\u8d85\u8f7d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\uff0c\u5426\u5219\u8fd4\u56de\u7a7a\u3002<\/li>\n<li><b>\u6e90\u5730\u5740\u6563\u5217\uff08Source Hashing\uff09<\/b><br \/>\n\\&#8221;\u6e90\u5730\u5740\u6563\u5217\\&#8221;\u8c03\u5ea6\u7b97\u6cd5\u6839\u636e\u8bf7\u6c42\u7684\u6e90IP\u5730\u5740\uff0c\u4f5c\u4e3a\u6563\u5217\u952e\uff08Hash Key\uff09\u4ece\u9759\u6001\u5206\u914d\u7684\u6563\u5217\u8868\u627e\u51fa\u5bf9\u5e94\u7684\u670d\u52a1\u5668\uff0c\u82e5\u8be5\u670d\u52a1\u5668\u662f\u53ef\u7528\u7684\u4e14\u672a\u8d85\u8f7d\uff0c\u5c06\u8bf7\u6c42\u53d1\u9001\u5230\u8be5\u670d\u52a1\u5668\uff0c\u5426\u5219\u8fd4\u56de\u7a7a\u3002<\/li>\n<\/ol>\n<p><span class=\\\"atitle3\\\">3.2 \u5185\u6838Layer-7\u4ea4\u6362\u673aKTCPVS<\/span><br \/>\n\u5728\u57fa\u4e8eIP\u8d1f\u8f7d\u8c03\u5ea6\u6280\u672f\u4e2d\uff0c\u5f53\u4e00\u4e2aTCP\u8fde\u63a5\u7684\u521d\u59cbSYN\u62a5\u6587\u5230\u8fbe\u65f6\uff0c\u8c03\u5ea6\u5668\u5c31\u9009\u62e9\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u5c06\u62a5\u6587\u8f6c\u53d1\u7ed9\u5b83\u3002\u6b64\u540e\u901a\u8fc7\u67e5\u53d1\u62a5\u6587\u7684IP\u548cTCP\u62a5\u6587\u5934\u5730 \u5740\uff0c\u4fdd\u8bc1\u6b64\u8fde\u63a5\u7684\u540e\u7ee7\u62a5\u6587\u88ab\u8f6c\u53d1\u5230\u8be5\u670d\u52a1\u5668\u3002\u8fd9\u6837\uff0cIPVS\u65e0\u6cd5\u68c0\u67e5\u5230\u8bf7\u6c42\u7684\u5185\u5bb9\u518d\u9009\u62e9\u670d\u52a1\u5668\uff0c\u8fd9\u5c31\u8981\u6c42\u540e\u7aef\u670d\u52a1\u5668\u7ec4\u63d0\u4f9b\u76f8\u540c\u7684\u670d\u52a1\uff0c\u4e0d\u7ba1\u8bf7\u6c42\u88ab\u53d1\u9001\u5230\u54ea \u4e00\u53f0\u670d\u52a1\u5668\uff0c\u8fd4\u56de\u7ed3\u679c\u90fd\u662f\u4e00\u6837\u7684\u3002\u4f46\u662f\uff0c\u5728\u6709\u4e9b\u5e94\u7528\u4e2d\u540e\u7aef\u670d\u52a1\u5668\u529f\u80fd\u4e0d\u4e00\uff0c\u6709\u7684\u63d0\u4f9bHTML\u6587\u6863\uff0c\u6709\u7684\u63d0\u4f9b\u56fe\u7247\uff0c\u6709\u7684\u63d0\u4f9bCGI\uff0c\u8fd9\u5c31\u9700\u8981\u57fa\u4e8e\u5185\u5bb9\u7684\u8c03\u5ea6 (Content-Based Scheduling)\u3002<br \/>\n\u7531\u4e8e\u7528\u6237\u7a7a\u95f4TCP Gateway\u7684\u5f00\u9500\u592a\u5927\uff0c\u6211\u4eec\u63d0\u51fa\u5728\u64cd\u4f5c\u7cfb\u7edf\u7684\u5185\u6838\u4e2d\u5b9e\u73b0Layer-7\u4ea4\u6362\u65b9\u6cd5\uff0c\u6765\u907f\u514d\u7528\u6237\u7a7a\u95f4\u4e0e\u6838\u5fc3\u7a7a\u95f4\u7684\u5207\u6362\u548c\u5185\u5b58\u590d\u5236\u7684\u5f00\u9500\u3002\u5728Linux\u64cd\u4f5c\u7cfb\u7edf\u7684\u5185\u6838\u4e2d\uff0c\u6211\u4eec\u5b9e\u73b0\u4e86Layer-7\u4ea4\u6362\uff0c\u79f0\u4e4b\u4e3aKTCPVS\uff08Kernel TCP Virtual Server\uff09\u3002\u76ee\u524d\uff0cKTCPVS\u5df2\u7ecf\u80fd\u5bf9HTTP\u8bf7\u6c42\u8fdb\u884c\u57fa\u4e8e\u5185\u5bb9\u7684\u8c03\u5ea6\uff0c\u4f46\u5b83\u8fd8\u4e0d\u5f88\u6210\u719f\uff0c\u5728\u5176\u8c03\u5ea6\u7b97\u6cd5\u548c\u5404\u79cd\u534f\u8bae\u7684\u529f\u80fd\u652f\u6301\u7b49\u65b9\u9762\uff0c\u6709\u5927\u91cf\u7684\u5de5\u4f5c\u9700\u8981\u505a\u3002<br \/>\n\u867d\u7136\u5e94\u7528\u5c42\u4ea4\u6362\u5904\u7406\u590d\u6742\uff0c\u5b83\u7684\u4f38\u7f29\u6027\u6709\u9650\uff0c\u4f46\u5e94\u7528\u5c42\u4ea4\u6362\u5e26\u6765\u4ee5\u4e0b\u597d\u5904\uff1a<\/p>\n<ul>\n<li>\u76f8\u540c\u9875\u9762\u7684\u8bf7\u6c42\u88ab\u53d1\u9001\u5230\u540c\u4e00\u670d\u52a1\u5668\uff0c\u53ef\u4ee5\u63d0\u9ad8\u5355\u53f0\u670d\u52a1\u5668\u7684Cache\u547d\u4e2d\u7387\u3002<\/li>\n<li>\u4e00\u4e9b\u7814\u7a76[5]\u8868\u660eWEB\u8bbf\u95ee\u6d41\u4e2d\u5b58\u5728\u5c40\u90e8\u6027\u3002Layer-7\u4ea4\u6362\u53ef\u4ee5\u5145\u5206\u5229\u7528\u8bbf\u95ee\u7684\u5c40\u90e8\u6027\uff0c\u5c06\u76f8\u540c\u7c7b\u578b\u7684\u8bf7\u6c42\u53d1\u9001\u5230\u540c\u4e00\u53f0\u670d\u52a1\u5668\uff0c\u4f7f\u5f97\u6bcf\u53f0\u670d\u52a1\u5668\u6536\u5230\u7684\u8bf7\u6c42\u5177\u6709\u66f4\u597d\u7684\u76f8\u4f3c\u6027\uff0c\u53ef\u8fdb\u4e00\u6b65\u63d0\u9ad8\u5355\u53f0\u670d\u52a1\u5668\u7684Cache\u547d\u4e2d\u7387\u3002<\/li>\n<li>\u540e\u7aef\u670d\u52a1\u5668\u53ef\u8fd0\u884c\u4e0d\u540c\u7c7b\u578b\u7684\u670d\u52a1\uff0c\u5982\u6587\u6863\u670d\u52a1\uff0c\u56fe\u7247\u670d\u52a1\uff0cCGI\u670d\u52a1\u548c\u6570\u636e\u5e93\u670d\u52a1\u7b49\u3002<\/li>\n<\/ul>\n<p><strong><span class=\\\"atitle2\\\">LVS\u96c6\u7fa4\u7684\u7279\u70b9<\/span><\/strong><br \/>\nLVS\u96c6\u7fa4\u7684\u7279\u70b9\u53ef\u4ee5\u5f52\u7ed3\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li><b>\u529f\u80fd<\/b><br \/>\n\u6709\u5b9e\u73b0\u4e09\u79cdIP\u8d1f\u8f7d\u5747\u8861\u6280\u672f\u548c\u516b\u79cd\u8fde\u63a5\u8c03\u5ea6\u7b97\u6cd5\u7684IPVS\u8f6f\u4ef6\u3002\u5728IPVS\u5185\u90e8\u5b9e\u73b0\u4e0a\uff0c\u91c7\u7528\u4e86\u9ad8\u6548\u7684Hash\u51fd\u6570\u548c\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u80fd\u6b63\u786e\u5904\u7406\u6240\u8c03\u5ea6\u62a5\u6587\u76f8 \u5173\u7684ICMP\u6d88\u606f\uff08\u6709\u4e9b\u5546\u54c1\u5316\u7684\u7cfb\u7edf\u53cd\u800c\u4e0d\u80fd\uff09\u3002\u865a\u62df\u670d\u52a1\u7684\u8bbe\u7f6e\u6570\u76ee\u6ca1\u6709\u9650\u5236\uff0c\u6bcf\u4e2a\u865a\u62df\u670d\u52a1\u6709\u81ea\u5df1\u7684\u670d\u52a1\u5668\u96c6\u3002\u5b83\u652f\u6301\u6301\u4e45\u7684\u865a\u62df\u670d\u52a1\uff08\u5982HTTP Cookie\u548cHTTPS\u7b49\u9700\u8981\u8be5\u529f\u80fd\u7684\u652f\u6301\uff09\uff0c\u5e76\u63d0\u4f9b\u8be6\u5c3d\u7684\u7edf\u8ba1\u6570\u636e\uff0c\u5982\u8fde\u63a5\u7684\u5904\u7406\u901f\u7387\u548c\u62a5\u6587\u7684\u6d41\u91cf\u7b49\u3002\u9488\u5bf9\u5927\u89c4\u6a21\u62d2\u7edd\u670d\u52a1\uff08Deny of Service\uff09\u653b\u51fb\uff0c\u5b9e\u73b0\u4e86\u4e09\u79cd\u9632\u536b\u7b56\u7565\u3002<br 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