{"id":490,"date":"2014-10-27T06:07:08","date_gmt":"2014-10-27T06:07:08","guid":{"rendered":"http:\/\/zhuangzr.me\/wordpress\/?p=490"},"modified":"2014-12-12T06:08:13","modified_gmt":"2014-12-12T06:08:13","slug":"openstack-openvswitch-gre-%e7%bb%84%e7%bd%91%e4%b8%8b%e7%9a%84%e9%80%bb%e8%be%91%e6%9e%b6%e6%9e%84","status":"publish","type":"post","link":"https:\/\/zhuangzr.me\/wordpress\/2014\/10\/openstack-openvswitch-gre-%e7%bb%84%e7%bd%91%e4%b8%8b%e7%9a%84%e9%80%bb%e8%be%91%e6%9e%b6%e6%9e%84\/","title":{"rendered":"Openstack OpenVSwitch GRE \u7ec4\u7f51\u4e0b\u7684\u903b\u8f91\u67b6\u6784"},"content":{"rendered":"<p>\u865a\u62df\u5316\u5b9e\u4f8b\uff08\u865a\u62df\u673a\uff09\u4ea7\u751f\u6570\u636e\u5305\u5e76\u5c06\u5176\u901a\u8fc7\u5176\u5185\u90e8\u7684\u865a\u62df\u7f51\u7edc\u63a5\u53e3\uff08 virtual NIC\uff09\u6bd4\u5982eth0\uff0c\u53d1\u9001\u51fa\u6765\uff0c\u5e76\u88ab\u4f20\u9001\u5230\u8ba1\u7b97\u8282\u70b9\u7684Test Access Point (TAP)\u8bbe\u5907\u4e0a\u3002\u4ece<code class=\"filename\">\/etc\/libvirt\/qemu\/instance-xxxxxxxx.xml<\/code>\u6587\u4ef6\u8bb0\u5f55\u4e86\u5f53\u524d\u8bbe\u5907\u7684\u914d\u7f6e\u4fe1\u606f\u3002<\/p>\n<p>TAP\u8bbe\u5907\u7684\u540d\u79f0\u7531\u7aef\u53e3ID\u7684\u524d11\u4f4d\u7ec4\u6210\uff0810\u4f4d\u5341\u516d\u8fdb\u5236\u7801\u548c1\u4f4d\u8fde\u5b57\u7b26\uff09\uff0c\u6240\u4ee5\u53e6\u5916\u4e00\u79cd\u83b7\u53d6TAP\u8bbe\u5907\u540d\u79f0\u7684\u65b9\u6cd5\u5c31\u662f\u4f7f\u7528<code class=\"literal\">neutron<\/code>\u547d\u4ee4\u3002<code>neutron port-list<\/code>\u547d\u4ee4\u8fd4\u56de\u7aef\u53e3\u5217\u8868\uff0c\u7b2c\u4e00\u9879\u662f\u7aef\u53e3ID\u3002\u5229\u7528\u8fd9\u91cc\u8f93\u51fa\u7684\u524d11\u4e2a\u5b57\u7b26\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u76f8\u5e94TAP\u8bbe\u5907\u7684\u540d\u79f0\u3002<\/p>\n<pre class=\"screen\"><img decoding=\"async\" src=\"http:\/\/git.openstack.org\/cgit\/openstack\/operations-guide\/plain\/doc\/openstack-ops\/figures\/osog_1202.png\" alt=\"\" \/>\r\n\r\n<\/pre>\n<p>TAP\u8bbe\u5907\u8fde\u63a5\u5230\u6574\u5408\u7f51\u6865 <code>br-int<\/code>\u3002\u8be5\u7f51\u6865\u8fde\u63a5\u6240\u6709\u5b9e\u4f8b\u7684TAP\u8bbe\u5907\u4ee5\u53ca\u7cfb\u7edf\u5185\u7684\u5176\u4ed6\u7f51\u6865\u3002\u5728\u672c\u4f8b\u5f53\u4e2d\uff0c\u6709 <code>int-br-eth1<\/code>\u548c<code>patch-tun<\/code>\u63a5\u53e3\u3002int-br-eth1\u662f\u8fde\u63a5\u5230br-eth1\u7f51\u6865\u7684\u6865\u81c2\u7684\u4e00\u7aef\uff0c\u5904\u7406\u7269\u7406\u63a5\u53e3eth1\u4e0a\u627f\u8f7d\u7684VLAN\u3002patch-tun\u662fOpenvSwitch\u7684\u5185\u90e8\u7aef\u53e3\uff0c\u8fde\u63a5\u5230br-tun\u7f51\u6865\uff0c\u7528\u6765\u63d0\u4f9bGRE\u5c01\u88c5\u96a7\u9053\u7f51\u7edc\u3002<\/p>\n<p>\u7f51\u7edc\u8282\u70b9\u4fa7\u7684br-int\u6574\u5408\u7f51\u6865\uff0c\u96c6\u6210\u4e86\u76f8\u5e94\u7684\u7f51\u7edc\u529f\u80fd\uff0c\u6bd4\u5982DHCP\u670d\u52a1\uff08dnsmsq\uff09\uff0cNS\u670d\u52a1\uff08dnsmsq\uff09\uff0c3\u5c42\u8def\u7531\u670d\u52a1\uff08\u5b9e\u9645\u4e0a\u5c31\u662f\u5229\u7528netns\u548ciptables\u505a\u7684\u9694\u79bb\uff09\uff0c\u5b89\u5168\u7ec4\u548c\u9632\u706b\u5899\uff08iptables\uff09\u3002\u8fd8\u6709br-ext\u53ef\u4ee5\u63d0\u4f9b\u5916\u7f51\u7684\u63a5\u5165\u652f\u6301\u3002<\/p>\n<p>\u8ba1\u7b97\u8282\u70b9\u5bfc\u7f51\u7edc\u8282\u70b9\u4e4b\u95f4\u7684\u901a\u4fe1\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u5b9e\u73b0\u3002\u53ef\u4ee5\u91c7\u75282\u5c42VLAN\/Vxlan\u7684\u65b9\u5f0f\uff08br-eth1\uff09\uff0c\u6216\u8005\u5728\u4e09\u5c42\u4e0a\u6253GRE\u96a7\u9053\uff08br-tun\uff09\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u865a\u62df\u5316\u5b9e\u4f8b\uff08\u865a\u62df\u673a\uff09\u4ea7\u751f\u6570\u636e\u5305\u5e76\u5c06\u5176\u901a\u8fc7\u5176\u5185\u90e8\u7684\u865a\u62df\u7f51\u7edc\u63a5\u53e3\uff08 virtual NIC\uff09\u6bd4\u5982eth0\uff0c\u53d1\u9001\u51fa\u6765\uff0c\u5e76\u88ab\u4f20\u9001\u5230\u8ba1\u7b97\u8282\u70b9\u7684Test Access Point (TAP)\u8bbe\u5907\u4e0a\u3002\u4ece\/etc\/libvirt\/qemu\/instance-xxxxxxxx.xml\u6587\u4ef6\u8bb0\u5f55\u4e86\u5f53\u524d\u8bbe\u5907\u7684\u914d\u7f6e\u4fe1\u606f\u3002 TAP\u8bbe\u5907\u7684\u540d\u79f0\u7531\u7aef\u53e3ID\u7684\u524d11\u4f4d\u7ec4\u6210\uff0810\u4f4d\u5341\u516d\u8fdb\u5236\u7801\u548c1\u4f4d\u8fde\u5b57\u7b26\uff09\uff0c\u6240\u4ee5\u53e6\u5916\u4e00\u79cd\u83b7\u53d6TAP\u8bbe\u5907\u540d\u79f0\u7684\u65b9\u6cd5\u5c31\u662f\u4f7f\u7528neutron\u547d\u4ee4\u3002neutron port-list\u547d\u4ee4\u8fd4\u56de\u7aef\u53e3\u5217\u8868\uff0c\u7b2c\u4e00\u9879\u662f\u7aef\u53e3ID\u3002\u5229\u7528\u8fd9\u91cc\u8f93\u51fa\u7684\u524d11\u4e2a\u5b57\u7b26\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u76f8\u5e94TAP\u8bbe\u5907\u7684\u540d\u79f0\u3002 TAP\u8bbe\u5907\u8fde\u63a5\u5230\u6574\u5408\u7f51\u6865 br-int\u3002\u8be5\u7f51\u6865\u8fde\u63a5\u6240\u6709\u5b9e\u4f8b\u7684TAP\u8bbe\u5907\u4ee5\u53ca\u7cfb\u7edf\u5185\u7684\u5176\u4ed6\u7f51\u6865\u3002\u5728\u672c\u4f8b\u5f53\u4e2d\uff0c\u6709 int-br-eth1\u548cpatch-tun\u63a5\u53e3\u3002int-br-eth1\u662f\u8fde\u63a5\u5230br-eth1\u7f51\u6865\u7684\u6865\u81c2\u7684\u4e00\u7aef\uff0c\u5904\u7406\u7269\u7406\u63a5\u53e3eth1\u4e0a\u627f\u8f7d\u7684VLAN\u3002patch-tun\u662fOpenvSwitch\u7684\u5185\u90e8\u7aef\u53e3\uff0c\u8fde\u63a5\u5230br-tun\u7f51\u6865\uff0c\u7528\u6765\u63d0\u4f9bGRE\u5c01\u88c5\u96a7\u9053\u7f51\u7edc\u3002 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