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API front-end servicesEach OpenStack component may contain several sub-services, which must have an API service that is responsible for receiving customer requests.In Nova, for example, Nova-api as a unique window to the Nova component, exposing the capabilities that Nova can provide to customers. When customers need to perform VM-related operations, they can and only send REST requests to NOVA-API. Customers here include end users, command lines, and other OpenStack components.The benefits of d

. VM2 is located in another local network, VM2 cannot communicate with VM0 and VM1 because Brqxxxx and brqyyyy are not connected. Next we will implement the local network step-by-step.enable local network in the ML2 configurationMake sure that ML2 has loaded the local type driver before you create the local network. The ML2 configuration file is located in/etc/neutron/plugins/ml2/ml2_conf.ini.Type_drivers tells ML2 to load all 5 types of netw

example1. Container InfoDocker exec xbox1 IP link showDocker exec xbox1 IP addr ShowDocker exec xbox1 IP route showYou can see that there is an LO port and another network port in our container, and the flannel network only generates one network card2. Host InfoIn the container: 5: [Email protected] Host: 6: [email protected] is a pair of vnet_pair, and the bridge is connected to the Docker0 bridgecan communicate with the external network, traceroute

Preface Blockchain development is really fast this year. From the first unfamiliar concept, to now has started in various industries, a spark of great prairie fire. I wish I could have my own blockchain practice practiced hand O (∩_∩) o~. But a person, a computer, how to set up the blockchain environment ... It's not easy to say you love a block chain of fire. Don ' t worry! Small series have been addicted to blockchain and smart contracts can not extricate themselves. Now take your hands from

abstracted different driver, but the underlying implementation is definitely a difference.So, let's figure out what's changed in the underlying network.Open the shell terminal of the control node and use Ovs-vsctl Show to view the status of the current open vSwitch.You can see that Neutron automatically created port "Tap7970bdcd-f2" on the Br-int Bridge.It is known from the name that the port corresponds to the DHCP interface of local_net.Like Linux bridge driver, DHCP devices are also placed i

) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170129-1485643608383069789.png "/>Create a SUBNET_10_10_10_0,IP address of 10.10.10.0/24.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170129-1485643608495051489.png "/>Here Gateway we use the default address 10.10.10.1.Usually we need to ask the network administrator for the gateway IP of the extranet subnet, and then fill it in here.Click "Next".650) this.width=650

Although the external network is an existing network, we still need to define the objects of the external network in Neutron so that router knows how to connect the tenant network to the external network.In the previous section we have configured the ML2 for creating the external network, and this section will create the ext_net through the UI.Go to the Admin-Networks menu and click on the "Create Network" button.The Create page is displayed.Provider network Type Select "Flat" Physical network t

before we created the vlan100 and deployed the instance, today we will continue creating a second VLAN network "vlan101". The subnet IP address is 172.16.101.0/24.what has changed in the underlying networkNeutron automatically creates the vlan101 corresponding bridge Brq1d7040b8-01,vlan interface eth1.101, as well as the DHCP tap device tap5b1a2247-32. Eth1.101 and tap5b1a2247-32 are already connected to Brq1d7040b8-01,vlan 101 's two-layer network ready.Now, the network structure is as follows:

In the previous section we created "Flat_net", which will deploy instance and verify connectivity in this network.Launch the new instance "CIRROS-VM1", select Network Falt_net.The IP assigned to the CIRROS-VM1 is 172.16.1.103.The CIRROS-VM1 is schedule to the control node, the corresponding tap device is TAPC1875C7F-CB, and is already connected to bridge.The structure of the current flat_net is as follows:Continue to launch the instance cirros-vm2 in the same way, assigning the IP to 172.16.1.10

=" border:0px;margin:0px;padding:0 px; "/>Neutron automatically creates a new flat_net corresponding to the bridge BRQF153B42F-C3, as well as the DHCP tap device Tap19a0ed3d-fe. In addition, the TAP19A0ED3D-FE and the physical NIC Eth1 are already connected to bridge.At this point the flat_net structure:650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160915-1473894690094083498.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160

-ueditor-image-20160929-1475155246496083388.jpg "/>The above configuration defines the label as ldquo;defaultrdquo; The range of VLAN Network,vlan IDs is 3001-4000. This range is for ordinary users to create a network within their own tenants. Because a normal user does not specify a VLAN when creating a network Id,neutron will automatically take the value from this range in order.For admin There is no VLAN ID limit, admin can create VLAN network with ID range 1-4094.Next, you need to indicate t

intuitive and friendly, easy to get started. At the same time we can also use the command Virsh to manage the virtual machine, such as viewing the virtual machine on the host[Email protected]:~# virsh listId Name State --------------------------------8 kvm1 Runningat this point, the first virtual machine has run, the default settings are used, we will gradually discuss the details of the virtual machine, such as storage and network card settings. Start the first

;float:none; "/>Cinder-scheduler sending MessagesCinder-scheduler send a message to Cinder-volume, let it create volume source/opt/stack/cinder/cinder/scheduler/filter_scheduler.py, method for Schedule_create_volume.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160623-1466685098724062746.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160623-1466685216794088544.jpg "style=" border:0px;white-space:normal;float:none; "/>In the

Instance, and the compute node itself is working properly. If the compute node fails, OpenStack cannot communicate with the node's nova-compute, and all instance running on it will be affected. At this point, the Instance can only be rebuilt on other normal nodes through the evacuate operation.EvacuateRebuilds Instance on other compute nodes using the Instance image file on the shared storage. So planning for shared storage ahead of time is key.SectionHere, we've learned about the OpenStack Nov

-space:normal;float:none; "/>There is one more question: volume provider put in there?Generally speaking, volume provider is independent. Cinder-volume uses driver to communicate with volume provider and coordinate work. So you just have to put driver and cinder-volume together. In the Cinder-volume source code directory There are many driver, support different volume provider.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160610-1465514562334003570.p

://download.cirros-cloud.net/. Format Selection QCOW2.If checked, the image can be used by other Project if checked, the image is not allowed to be deleted. Click, upload the file to OpenStack and create a new image Click the image link to display more information CLI Create ImageCirros This Linux image is very small and uploads quickly through the Web UI, and the operation will be smooth. But if we want to upload a larger image (such as several G), then the operation of the long time to

; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160519-1463665221849004007.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160519-1463665379946005376.jpg "style=" border:0px;white-space:normal;float:none; "/>Snapshot successfully saved in Glance650 "this.width=650;" title= "/HTTP// 7xo6kd.com1.z0.glb.clouddn.com/upload-ueditor-image-20160519-1463665221868019452.png "src=" http// 7xo6kd.com1.z0.glb.clouddn.com/upload-ueditor-image-20160519-1463665