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Bridge to open VSwitch, you first need to install the Open VSwitch Agent. To modify the Devstack local.conf:Rerun./stack,devstack will automatically download and install the Open vSwitch.You can then modify the ML2 configuration file/etc/neutron/plugins/ml2/ml2_conf.ini, which is set using Openvswitch mechanism driver.Both the control node and the compute node need to install and configure the Open VSwitch as described above.After the Neutron service restarts, you can see Neutron-openvswitch-ag

, because the traffic sent to the outside network is forwarded through the virtual router on the network node, so the Br-ext will only be placed on the network node (Devstack-controller).understand the various network devices in the Open vSwitch environmentIn an Open vSwitch environment, a packet sent from the instance to the physical NIC will roughly go through the following types of devices: Tap interface is named Tapxxxx. Linux Bridge is named Qbrxxxx. Veth pair named Qvbxxxx, Qvoxxxx

public key into the instance ~/.ssh/authorized_keys file.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161208-1481159364615005326.jpg "/> SSH instance. Use the-I cloud.key to specify the private key and the Ubuntu user ssh "Web1" and "Web2".650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161208-1481159364774007049.jpg "/>Login instance without a password directly.Note: For the sake of demonstration, here we

Communication between instance in different VLANs can be achieved through router.The next question to be explored is how instance communicates with the external network.The external network here refers to a network outside the tenant network. A tenant network is a network created and maintained by Neutron. The external network is not created by Neutron. In the case of a private cloud, the external network usually refers to the corporate intranet, and if it is a public cloud, the external network

.glb.clouddn.com/ Upload-ueditor-image-20170117-1484631963570088105.jpg "/>The IP assigned to the CIRROS-VM3 is 172.16.101.103.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170117-1484632053655003094.png "alt=" Image615.png "/>The CIRROS-VM3 is schedule to the compute node and the virtual network card is connected to the Br-int.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170117-1484631963692015111.jpg "/>65

hope everyone can master.In the next section we begin to learn about the container network across hosts.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170711-1499780326078042943.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170728-1501192822377093870.jpg "alt=" QR code + fingerprint. png "style=" border:0px;font-family: ' Helvetica Neue ', Helvetica, ' Hiragino Sans GB ', ' Microsoft Yahei ', Arial, sans-serif;font-size:med

bbox2, specifying the IP 172.16.86.11.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170815-1502768402042042258.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170815-1502768499077041361.jpg "style=" border:0px;float:none; "/>Verify the connectivity of Bbox1 and Bbox1.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170815-1502768402030088381.png "src=" http://7xo6kd.com1.z0.glb.clou

In addition to Overlay,docker, another Driver:macvlan has been developed to support cross-host container networks.The Macvlan itself is the Linxu kernel module, which allows multiple MAC addresses to be configured on the same physical network card, that is, multiple interface, each of which can be configured with its own IP. Macvlan is essentially a network card virtualization technology, it's not surprising that Docker implements a container network with Macvlan.The biggest advantage of Macvlan

respective ml2_conf.ini.After the Neutron service starts normally, all nodes will run Neutron-linuxbridge-agent650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160824-1471992817408015123.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160824-1471993265149058572.jpg "style=" border:0px;white-space:normal;float:none; "/>Linux-bridge mechanism driver is configured, the next section examines the current network status.With the prac

To support container Cross host communication, Docker provides overlay driver, allowing users to create overlay networks based on Vxlan. Vxlan can encapsulate two-tier data into UDP for transmission, Vxlan provides the same Ethernet two-tier service as the VLAN, but with greater scalability and flexibility. More detailed information about Vxlan can be referenced in the relevant chapters of Cloudman's 5-minute play