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- OpenstackÍøÂç×é¼þµÄ·¢Õ¹Àú³Ì

- NeutronµÄ½á¹¹

- Neutron ServerµÄ½á¹¹

- NeutronµÄÅäÖÃ

1.1 nova-network

OpenstackÔÚ2010ÄêÕýʽ·¢²¼ËüµÄµÚÒ»¸ö°æ±¾AustinµÄʱºò£¬nova-network×÷ΪËüµÄºËÐÄ×é¼þ±»°üº¬ÆäÖС£nova-networkµÄ¹¦ÄÜÖ÷ÒªÓУº

IPµØÖ··ÖÅä°üº¬ÎªÐéÄâÖ÷»ú·ÖÅä˽ÓУ¨¹Ì¶¨£©ºÍ¸¡¶¯IPµØÖ·¡£

ÍøÂçÄ£ÐÍÓë¹ÜÀíÌṩÁËÐéÄâÍøÂçʹÐéÄâÖ÷»úÖ®¼äÒÔ¼°ÓëÍâ²¿ÍøÂçͨÐÅ¡£ÍøÂçÄ£ÐÍ·ÖΪÒÔÏÂÈýÖÖ¡£ÕâÈýÖÖÄ£ÐÍ¿ÉÒÔ¹²´æÔÚÒ»¸öÔÆÏµÍ³ÖУ¬µ«ÊÇÔÚÒ»¸ö¼ÆËã½ÚµãÉÏÖ»ÄÜÅ䱸һÖÖÄ£ÐÍ¡£

±âÆ½ÍøÂç £¨Flat Network£©£ºÔÚ´´½¨ÐéÄâÖ÷»úʱ£¬nova-network»á´ÓÖ¸¶¨×ÓÍøÖÐȡһ¸ö¿ÕÏÐIP²¢½«ËüдÈë´ËÐéÄâÖ÷»úµÄÅäÖÃÎļþ¡£ÔÚÒ»¸ö×ÓÍøÄÚµÄÐéÄâÖ÷»ú¿ÉÒÔͨ¹ý´´½¨LinuxÇÅʵÏÖ»¥Í¨¡£

´øDHCP¹¦ÄÜµÄ±âÆ½ÍøÂç £¨Flat DHCP Network£©£º¹ËÃû˼Ò壬´ËÖÖģʽÏà¶ÔÓÚ±âÆ½ÍøÂç¼ÓÈëÁËDHCP¹¦ÄÜ¡£ÔÚ´´½¨ÐéÄâÖ÷»úʱ£¬nova-network»áÔÚÖ¸¶¨µÄ×ÓÍøÖÐΪ´ËÐéÄâÖ÷»ú·ÖÅäIPºÍÎïÀíµØÖ·£¬²¢½«ÕâЩÐÅÏ¢¸æÖªDHCP·þÎñÆ÷£¨Ä¬ÈÏÊÇdnsmasq£©¡£DHCP·þÎñÆ÷»á¼àÌýÐéÄâÖ÷»úËùÔÚµÄÇÅ¡£µ±ÓÐÐéÄâÖ÷»úÆô¶¯Ê±£¬»á×Ô¶¯´ÓDHCP·þÎñÆ÷»ñµÃIP¡£¿ÉÒÔ¿´µ½DHCP·þÎñÆ÷Ö»Êǰ´ÕÕnova-network¸ø¶¨µÄÁÐ±í£¨IPºÍÎïÀíµØÖ·£©·Ö·¢IP£¬ÈçºÎ·ÖÅ仹ÊÇnova-network˵ÁËËã¡£

VLANÍøÂç £¨VLAN Network£©£ºÕâÊÇnova-networkµÄĬÈÏÄ£ÐÍ¡£Õë¶Ôÿ¸öÏîÄ¿£¨Project£¬Èç½ñOpenstack°ÑÏîÄ¿¸Ä³Æ×â»§ -- Tenant£©£¬¶¼»á¶ÔÓ¦Ò»¸övlan¡£Ã¿¸öÏîÄ¿ÀïµÄ˽ÓÐIPµØÖ·Ö»ÄÜÔÚ±¾ÏîÄ¿µÄvlanÀï·ÃÎÊ¡£ÓëÏîÄ¿¶ÔÓ¦µÄvlanÐèÒª×ÓÍø£¬Õâ¸ö×ÓÍøÊÇÓɹÜÀíÔ±¶¯Ì¬·ÖÅ䏸ÏîÄ¿µÄ¡£Óë´øDHCP¹¦ÄÜµÄ±âÆ½ÍøÂçÀàËÆ£¬×ÓÍøÄÚµÄIPµØÖ·Ò²ÊÇͨ¹ýDHCP·þÎñÆ÷·Ö·¢µÄ¡£ËùÓÐÔÚÒ»¸ö×ÓÍøÄÚµÄÐéÄâÖ÷»ú¶¼Í¨¹ýÍøÇÅ»¥Í¨¡£

°²È«¿ØÖÆÖ÷Ҫͨ¹ýebtablesºÍiptablesÀ´ÊµÏÖ¡£

1.2 Quantum

QuantumÊÇËæOpenstackµÄFolsom°æ±¾Õýʽ·¢²¼µÄ£¬ÆäʵËüÒѾ­×÷ΪÊÔÓÃ×é¼þ°üº¬ÔÚ֮ǰµÄEssex°æ±¾ÖС£ÔÚGrizzlyÀ﹦Äܵõ½ÁËÔöÇ¿¡£

ΪʲôÒýÈëQuantum£¿´ð°¸·Ç³£¼òµ¥£¬Quantum¹¦ÄܸüÇ¿´ó£¬Âú×ã¸ü¶àÐèÇó¡£ÏÂÃæÁм¸ÌõÖ÷Òª¹¦ÄÜ¡£

- Ìá¹©ÃæÏò×â»§µÄAPI£¬ÒÔ±ã¿ØÖÆ2²ãÍøÂçºÍ¹ÜÀíIPµØÖ·

- Ö§³Ö²å¼þÊ½ÍøÂç×é¼þ£¬ÏñOpen vSwitch£¬Cisco£¬Linux Bridge£¬Nicira NVPµÈµÈ

- Ö§³ÖλÓÚ²»Í¬µÄ2²ãÍøÂçµÄIPµØÖ·Öصþ

- Ö§³Ö»ù±¾µÄ3²ãת·¢ºÍ¶à·ÓÉÆ÷

- Ö§³ÖËíµÀ¼¼Êõ£¨Tunneling£©

- Ö§³Ö3²ã´úÀíºÍDHCP´úÀíµÄ¶à½Úµã²¿Êð£¬ÔöÇ¿ÁËÀ©Õ¹ÐԺͿɿ¿ÐÔ

- Ìṩ¸ºÔؾùºâAPI £¨ÊÔÓð汾£©

1.3 Neutron

ÒòΪÉ̱êÇÖȨµÄÔ­Òò£¬OpenstackÔÚHavana°æ±¾ÉϽ«Quantum¸üÃûΪNeutron£¬ËùÒÔNeutron²¢²»ÊÇʲôÐµĶ«Î÷¡£ÔÚHavana°æÀNeutronÒ²Ö»Ôö¼ÓºÍÔöÇ¿ÁËÉÙÊý¹¦ÄÜ¡£

- ÌṩÎȶ¨µÄ¸ºÔؾùºâAPI

- Ö§³Ö¶Ëµ½¶ËµÄIPSec VPN

- ÃæÏò×â»§µÄ·À»ðǽ·þÎñ

- Ìṩһ¸öеIJå¼þML2£¬Õâ¸ö²å¼þ¿ÉÒÔ×÷Ϊһ¸ö¿ò¼Üͬʱ֧³Ö²»Í¬µÄ2²ãÍøÂç

ÏÖÔںܶàÒѲ¿ÊðµÄOpenstackÔÆ»¹ÔÚ¼ÌÐøÊ¹ÓÃnova-network£¬ÒòΪËü¼òµ¥£¬Îȶ¨£¬ÓÈÆäÊǶà½Úµã²¿ÊðµÄ¿ÉÀ©Õ¹ÐԺͿɿ¿ÐÔÈÃÈ˲»Ô¸¸îÉá¡£µ«ÊÇÎÒÃDZØÐ뿼ÂÇÍùNeutronÉÏÇ¨ÒÆÁË£¬×îаæIcehouse£¨»¹Î´·¢²¼£©ÖеÄnova-network½«»á±»ÁÐΪ¹ýÆÚ×é¼þ£¬ËäȻϵͳ»¹Ö§³Ö£¬µ«²»½¨ÒéʹÓÃÁË¡£

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OpenstackµÄÉè¼ÆÀíÄîÊǰÑËùÓеÄ×é¼þµ±×ö·þÎñÀ´×¢²áµÄ¡£ Neutron¾ÍÊÇÍøÂç·þÎñ¡£Ëü½«ÍøÂç¡¢×ÓÍø¡¢¶Ë¿ÚºÍ·ÓÉÆ÷³éÏ󻯣¬Ö®ºóÆô¶¯µÄÐéÄâÖ÷»ú¾Í¿ÉÒÔÁ¬½Óµ½Õâ¸öÐéÄâÍøÂçÉÏ£¬×î´óµÄºÃ´¦ÊÇÕâЩ¶¼¿ÉÊÓ»¯µÄÔÚHorizonÀïµÃµ½ÁËʵÏÖ£¬²¿Êð»òÕ߸ıäÒ»¸öSDN±äµÃ·Ç³£¼òµ¥£¬Ã»ÓÐרҵ֪ʶµÄÈËÉÔ¾­ÅàѵҲ¿ÉÒÔ×öµ½¡£

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- ×â»§´´½¨ÁËÒ»¸öÍøÂ磬±È·½Ëµmynet

- ×⻧Ϊ´ËÍøÂç·ÖÅäÒ»¸ö×ÓÍø£¬±ÈÈç192.168.122.0/24

- ×â»§Æô¶¯Ò»¸ö¿Í»§»ú£¬²¢Ö¸Ã÷Ò»¸öÍø¿ÚÁ¬½Óµ½mynet

- Nova֪ͨNeutron²¢ÔÚmynetÉÏ´´½¨Ò»¸ö¶Ë¿Ú£¬Èçport1

- NeutronÑ¡Ôñ²¢·ÖÅäÒ»¸öIP¸øport1

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²å¼þ´úÀí £¨Plugin Agent£©£º ÐéÄâÍøÂçÉϵÄÊý¾Ý°üµÄ´¦ÀíÔòÊÇÓÉÕâЩ²å¼þ´úÀíÀ´Íê³ÉµÄ¡£Ãû×ÖΪneutron-*-agent¡£ÔÚÿ¸ö¼ÆËã½ÚµãºÍÍøÂç½ÚµãÉÏÔËÐС£Ò»°ãÀ´ËµÄãÑ¡ÔñÁËʲô²å¼þ£¬¾ÍÐèҪѡÔñÏàÓ¦µÄ´úÀí¡£´úÀíÓëNeutron Server¼°Æä²å¼þµÄ½»»¥¾Íͨ¹ýÏûÏ¢¶ÓÁÐÀ´Ö§³Ö¡£

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3²ã´úÀí £¨L3 Agent£©£º Ãû×ÖΪneutron-l3-agent£¬ Ϊ¿Í»§»ú·ÃÎÊÍâ²¿ÍøÂçÌṩ3²ãת·¢·þÎñ¡£Ò²²¿ÊðÔÚÍøÂç½ÚµãÉÏ¡£

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2.1 API

APIÓÖ·ÖΪÁ½¸ö²¿·Ö¡£

API Core£ºÔÝÇÒ³ÆÖ®ÎªAPIºË¡£Ëü¿ÉÒÔ¿´×öÊDzå¼þ¹¦ÄܵÄ×îС¼¯ºÏ£¬¼´Ã¿¸ö²å¼þ¶¼±ØÐëÓеŦÄÜ£¬Ò²¾ÍÊǶÔÍøÂç¡¢×ÓÍøºÍ¶Ë¿ÚµÄ²éѯ¡¢¼ÓɾºÍ¸üвÙ×÷µÈ¡£

API Extensions£ºÔݳÆÖ®ÎªAPIÀ©Õ¹¡£ËüÃÇÒ»°ãÊÇÕë¶Ô¾ßÌå²å¼þʵÏֵģ¬ÕâÑù×â»§¾Í¿ÉÒÔÀûÓÃÕâЩ²å¼þ¶ÀÌØµÄ¹¦ÄÜ£¬±È·½Ëµ·ÃÎÊ¿ØÖÆ£¨ACL)ºÍQoS¡£

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µ±È»API²¿·ÖÒ²¸ºÔðNeutron·þÎñµÄÆô¶¯¡¢¿Í»§ÇëÇóºÍÏàÓ¦»Ø¸´µÄ´ò°üºÍÅÉ·¢ÒÔ¼°ÑéÖ¤Êý¾Ý¸ñʽ¼°ÆäÕýÈ·ÐÔ¡£Ò²ÓÐһЩ°²È«ºÍÎȶ¨»úÖÆ£¬±È·½Ëµ¶ÔAPIÇëÇóµÄÏÞÖÆÒÔ·ÀÖ¹DOS¹¥»÷À´±£Ö¤·þÎñÔÚ´ó¸ºÔØÏµĿÉÓÃÐÔ¡£

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2.2 ²å¼þ

ÏÂÃæÎÒÃÇÔÙÀ´¿´Ò»Ï²å¼þ¡£

´Ó¹¦ÄÜÉÏ˵£¬²å¼þÒ»°ãÓÐÒÔÏÂÄÚÈÝ¡£

- ´æ´¢µ±Ç°Âß¼­ÍøÂçµÄÅäÖÃÐÅÏ¢£¬Õâ¾ÍÐèÒªÒ»¸öÊý¾Ý¿â£¬±È·½ËµMySQL

- ÅжϺʹ洢Âß¼­ÍøÂçºÍÎïÀíÍøÂçµÄ¶ÔÓ¦¹ØÏµ£¬±È·½ËµÎªÒ»¸öÂß¼­ÍøÂçÑ¡ÔñÒ»¸övlan

- ÓëÒ»ÖÖ»ò¶àÖÖ½»»»»úͨÐÅÀ´ÊµÏÖÕâÖÖ¶ÔÓ¦¹ØÏµ¡£ÕâÒ»°ãͨ¹ýËÞÖ÷»úÉϵIJå¼þ´úÀíÀ´ÊµÏÖÕâÖÖ²Ù×÷£¬»òÕßÔ¶³ÌµÇ¼µ½½»»»»úÉÏÀ´ÅäÖá£

ÒÔOpen vSwitchΪÀý£¬ÏÂÃæÁгöÁ˲å¼þÐèÒª·ÃÎʵÄÊý¾Ý±í¡£

+---------------------------+
 | Tables_in_neutron         |
 +---------------------------+
 | agents                    |
 | allowedaddresspairs       |
 | dnsnameservers            |
 | externalnetworks          |
 | extradhcpopts             |
 | floatingips               |
 | ipallocationpools         |
 | ipallocations             |
 | ipavailabilityranges      |
 | networkdhcpagentbindings  |
 | networks                  |
 | ovs_network_bindings      |
 | ovs_tunnel_allocations    |
 | ovs_tunnel_endpoints      |
 | ovs_vlan_allocations      |
 | portbindingports          |
 | ports                     |
 | quotas                    |
 | routerl3agentbindings     |
 | routerroutes              |
 | routers                   |
 | securitygroupportbindings |
 | securitygrouprules        |
 | securitygroups            |
 | subnetroutes              |
 | subnets                   |
 +---------------------------+

NeutronµÄÅäÖÃÓ¦¸Ã˵ÊDZÈOpenstackµÄÆäËû×é¼þ¸´ÔÓÒ»µã¡£

³£ÓõÄÅäÖÃÄ£ÐÍÓÐÁ½ÖÖ£¬

°ÑNeutron Server·ÅÔÚ¿ØÖƽڵãÉÏ£¬DHCPºÍL3´úÀí·ÅÔÚÍøÂç½ÚµãÉÏ£¬¿É²Î¿¼Ò»Ï¹Ùͼ¡£

°ÑNeutronµÄËùÓв¿·Ö·ÅÔÚµ¥¶ÀµÄÍøÂç½ÚµãÉÏ¡£ÕâÖÖ·½Ê½¾ÍÊǰÑÉÏͼ²¿ÊðÔÚ¿ØÖƽڵãÖеÄneutron-server·Åµ½ÍøÂç½ÚµãÉÏ¡£

ÒòÎªÍøÂçÅäÖò»ÏñÍøÂçʹÓÃÄÇôƵ·±£¬ËùÒÔͨ³£½¨ÒéʹÓõÚÒ»ÖÖ·½°¸£¬Ã»ÓбØÒªµ¥¶À°Ñneutron-serverÄóöÀ´¡£ÒòΪneutron-serverÊǿɵ¥¶À²¿ÊðµÄ£¬ÎÒÃǾÍÄõڶþÖÖ·½°¸×÷ΪÀý×Ó¡£

ϵͳʹÓÃubuntu12.04£¬Èí¼þµÄ°²×°ÎÒÃǾͲ»ËµÁË£¬ÕâÀïÎÒÃDzÉÓÃOpen vSwitch²å¼þ¡££¨Õë¶ÔÐéÄâ½»»»»úOpen vSwitch£¬Neutron½¨ÒéÊÇʹÓÃML2²å¼þµÄ£¬µ«ÕâÀïÎÒÃÇΪÁ˼ÓÉî¶Ô²å¼þºÍ²å¼þ´úÀíµÄÀí½â£¬»¹ÊÇÑØÓÃÁËOpenvSwitch²å¼þ£©¡£

3.1 ¼ÆËã½ÚµãµÄÅäÖÃ

°²×°ÍêÈí¼þ°üÒԺ󣬼ÆËã½ÚµãÓ¦¸Ã¾ÍÓÐOpenvSwitchµÄ´úÀíÔÚÔËÐУ¬Ê¹ÓÃpsÃüÁî¿ÉÒÔ¿´µ½ÈçϽø³Ì¡£

/usr/bin/python /usr/bin/neutron-openvswitch-agent --config-file
=/etc/neutron/neutron.conf --config-file=/etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini

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neutron.confÖ÷ÒªÐèÒªÉèÖÃÈçϼ¸Ï

core_plugin = neutron.plugins.openvswitch.ovs_neutron_plugin.OVSNeutronPluginV2 //²å¼þÀàÐÍ
auth_strategy = keystone  // ÊÚȨ·½Ê½
rabbit_host = 192.168.122.1       //´¦ÀíÏûÏ¢¶ÓÁеÄÖ÷»úµØÖ·
[keystone_authtoken]      //keystoneÐÅÏ¢£¬ÕâÀïÖ»ÊÇÎÒµÄÀý×ÓÐÅÏ¢
auth_host = 192.168.122.1
 auth_port = 35357
 auth_protocol = http
 admin_tenant_name = service
 admin_user = neutron
 admin_password = neutron
 auth_url = http://192.168.122.1:35357/v2.0
 connection = mysql://neutron:neutron@192.168.122.100/neutron      //DBÐÅÏ¢

neutron.conf»áĬÈϰüº¬ÁíÒ»¸öÅäÖÃÎļþapi-paste.ini£¬¶ÔËüÖ»ÐèÌí¼ÓkeystoneÐÅÏ¢¡£ 
auth_host=192.168.122.1
 admin_user=neutron
 admin_tenant_name=service
 admin_password=neutron
 ovs_neutron_plugin.initÖ÷ÒªÐèÒªÉèÖÃÒÔϼ¸ÏÒÔvlanΪÀý£º
tenant_network_type = vlan       //ÍøÂçÀàÐÍ£¬ÀýÈçvlan£¬gre
 network_vlan_ranges = physnet1:1000:2999  //vlanID
 bridge_mappings = physnet1:br-int //ÓÃÓÚ¼ÆËã½ÚµãÉϿͻ§»úÄÚ²¿ÍøÂçµÄÍøÇÅ
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver

3.2 ÍøÂç½ÚµãµÄÅäÖÃ

°²×°ÍêÈí¼þºó£¬ÍøÂç½ÚµãÓ¦¸Ã»áÓÐÈçϽø³ÌÔÚÔËÐС£

/usr/bin/python /usr/bin/neutron-dhcp-agent --config-file
=/etc/neutron/neutron.conf --config-file=
/etc/neutron/dhcp_agent.ini /usr/bin/python /usr/bin/neutron-metadata-agent --config-file
=/etc/neutron/neutron.conf --config-file
=/etc/neutron/metadata_agent.ini /usr/bin/python /usr/bin/neutron-l3-agent --config-file=
/etc/neutron/neutron.conf --config-file=
/etc/neutron/l3_agent.ini /usr/bin/python /usr/bin/neutron-server
 --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini
/usr/bin/python /usr/bin/neutron-openvswitch-agent --config-file =/etc/neutron/neutron.conf --config-file=/etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini

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neutron.confºÍapi-paste.iniµÄÅäÖÃÓë¼ÆËã½ÚµãÉÏÊÇÒ»ÑùµÄ¡£ 

dhcp_agent.iniµÄÖ÷ÒªÉèÖÃÒÔϼ¸Ïî¡£¿´ÄÚÈÝ¿ÉÀí½âÆäÒâÒå¡£ 
interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
 dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
 metadata_agent.iniµÄÉèÖÃÖ÷ÒªÊÇkeystoneÏà¹ØµÄ¡£
auth_url = http://192.168.122.1:5000/v2.0
 auth_region = regionOne
 admin_tenant_name = service
 admin_user = neutron
 admin_password = neutron
 nova_metadata_ip = 192.168.122.1
 metadata_proxy_shared_secret = meta       //proxyµÄÃÜÂ룬¸öÈËÉèÖÃ
l3_agent.initµÄÉèÖá£
interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver

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auto eth1
 iface eth1 inet manual
         up ifconfig $IFACE 0.0.0.0 up
         down ip link set $IFACE down
 auto br-int
 iface br-int inet static
         address 10.100.1.2
         netmask 255.255.255.0

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Bridge br-int
Port "eth1"
Interface "eth1"
Port br-int
Interface br-int
type: internal

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