stopwatch 5 minutes

affect other sub-services, which means that the change is transparent to others. In the following sections, we can see the application of Messaging.DatabaseOpenStack components need to maintain their own state information. For example, Nova has a virtual machine in the specification, state, and this information is maintained in the database. Each OpenStack component has its own database in MySQL.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-2016

ctrl+a+n)ctrl+a+0..9 Switch to Window 0..9Ctrl+a+d temporarily disconnects (detach) the current screen session without interrupting the program's operationExecuting in the shellScreen-ls List all current sessionScreen-r stack back to devstack this sessionDelete an automatically created networkDevstack may create several test networks at deployment time, in order to get a clean environment that needs to be removedDelete Router admin->system->routersDelete Network Admin->system->networksSo far, w

-ueditor-image-20160404-1459724662268078986.png "title=" "style=" Border:none;color:rgb (51,51,51); font-family: ' Microsoft Yahei '; Font-size:14px;line-height:26px;white-space:normal;background-color:rgb ( 255,255,255); "/>Three networks are planned on the network: Management Network: Used for OpenStack internal management, such as communication between services. Use eth0 here VM (Tenant) Network:openstack The network that is used by the virtual machines that are deployed. OpenStack supp

access. The above is a few steps to create the core of the virtual machine, of course, also omitted a lot of details, we will discuss in detail in later chapters. These steps show us the way the collaboration between the nova-* sub-services is, and the distributed design of the entire OpenStack system, which is very helpful for us to gain an in-depth understanding of OpenStack.In the next section we will detail the general design ideas for OpenStack components.650) this.width=650; "title=" "sr

PluginImplements the Extension Plugin API, maintains the status of router, load balance, security group and other resources in the database, and is responsible for invoking the appropriate agent to perform related operations on network provider, such as creating Built router.To sum up, Neutron Server consists of two parts: 1. Provides API services. 2. Run Plugin.That is Neutron Server = API + PluginsUnderstanding the layered model of Neutron Server makes it easier to understand how Neutron supp

service.Network nodeThe services deployed include: Core plugin agent and service plugin agent.COMPUTE nodesDeploy core plugin agent, responsible for providing two layers of network functionality.The point of this scheme is to separate all the agents from the control nodes and deploy them to separate network nodes. The control node is only responsible for responding to API requests through Neutron server. Advanced network services such as data exchange, routing, and load balance are

driver for Linux Bridge and open Vswitch is to configure the virtual switches on each node. The type supported by Linux Bridge driver includes local, flat, VLAN, and Vxlan. Open Vswitch Driver supports GRE in addition to these 4 types.L2 population driver function is to optimize and limit the broadcast traffic in the overlay network. Both Vxlan and GRE belong to the overlay network.ML2 Core plugin has become the preferred plugin for OpenStack Neutron, and later in this tutorial we'll discuss ho

one by one corresponding. That is, if you choose Linux Bridge plugin, then the Linux Bridge Agent will be the only option, and you must use Linux Bridge as a virtual switch on all OpenStack nodes (that is, the network provide R).Similarly, if you choose Open Vswitch plugin, only open vswitch can be used on all nodes, and no other network provider can be used.Issue 2: Large workload for developing new core pluginAll traditional core plugin need to write a lot of duplicate and similar database ac

;white-space:normal;float:none; "/>Click "Next", Set subnet IP address range for 172.16.1.2-172.16.1.100,instance IP will be assigned from Here. The default is enable DHCP, and you can also set subnet DNS and add static route Entries.650) this.width=650; "title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160830-1472562653398092190.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160830-1472563205657043860.jpg "style=" border:0px;white-space:normal;floa

hardware or by using pure software. The more mature VTEP software implementations currently include: Linux with VXLAN kernel module Open VSwitch Let's start by looking at how Linux supports the Vxlan,open vSwitch approach, which is discussed later in this chapter.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161106-1478392973783000572.jpg "/>Implementation method: Linux Vxlan creates a UDP Socket, which is monitored by defau

provider, such as Radware,vmwareedge, are supported in addition to the default Haproxy,neutron.Restart the neutron service to ensure that the LBaaS is running properly.We will practice the following LBaaS environment.The environment is described as follows: 1. Create a Pool "Web Servers". 2. Two pool member "WEB1" and "WEB2" are all instance running Ubuntu cloud image. 3. The load balancer VIP is associated with the floating IP. 4. The client on the extranet accesses the Web server through the

"alt=" Image740.png "/>The environment is described as follows:1. Create a Pool "Web Servers".2. Two pool member "WEB1" and "WEB2" are all instance running Ubuntu cloud image.3. The load balancer VIP is associated with the floating IP.4. The client on the extranet accesses the Web server through the floating IP.At the beginning of the next section we will implement this LBaaS step-by-step.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161205-1480888431

or destination address of the packet according to the direction of the communication.Below we study floating IP in depth through experiments.Click the Access Security menu, Compute, Project, to open the floating IPs tab.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161030-1477803583313024492.jpg "/>Click on the "Allocate IP to Project" button.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161030-147780358407

through experiments.Click the Access Security menu, Compute, Project, to open the floating IPs tab.Click on the "Allocate IP to Project" button.Floating IP Pool is ext_net, click the "Allocate IP" button.An IP 10.10.10.3 was successfully assigned from the Pool. Let's assign it to CIRROR-VM3 and click on the "Associate" button.Select Cirror-vm3 in the drop-down list and click on the "Associate" button.The assignment succeeds, and the floating IP 10.10.10.3 already corresponds to the CIRROS-VM3

cirros-vm2 in the same way, assigning the IP to 172.16.100.4.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161113-1479026489473056264.jpg "/>The CIRROS-VM2 is schedule to the compute node, the corresponding tap device is TAP457CC048-AA, and connected to bridge brq1762d312-d4.650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161113-1479026489603043136.jpg "/>Because there is no HDCP service on the compute nodes,

configure firewall policy on router to provide network security protection.Another safety-related feature is the security Group, which is also implemented through IPtables. The difference between Firewall and Security Group is that: The Firewall security policy is located in router, which protects all network of a project. Security Group Safety Policy is located in instance and is protected by a single instance. Firewall and Security Group will be analyzed in detail later.Load

Opendaylight, VMWare NSX, and more.Physical switch basedIncludes Cisco Nexus, Arista, Mellanox, and more. For example, in the previous example, if you switch to Cisco's mechanism driver, you will add vlan100 on the specified trunk port of the Cisco physical switch.The mechanism driver discussed in this tutorial will cover Linux bridge, open vswitch and L2 population.The role of ML2 mechanism driver for Linux Bridge and open Vswitch is to configure the virtual switches on each node. The type sup

messages Nova-compute Performing actions 1, 22 steps are performed on the control node to view the log of the NOVA-API. The 3rd step is performed on the compute nodes, viewing the logs of the Nova-compute.650) this.width=650; "title=" "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160505-1462406117920043007.jpg "style=" Border:0px;vertical-align:middle;color:rgb ( 63,63,63); font-family: ' Microsoft Yahei '; Font-size:15px;line-height:21.75px;text-align:justify;ba

-1463039866218002906.jpg "style=" border:0px;white-space:normal;float:none; "/> The above is a detailed analysis of terminate, the next section we continue to analyze pause/resume operations. 650) this.width=650; "title=" "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160512-1463039866309045554.jpg "style=" Border:0px;vertical-align:middle;color:rgb ( 63,63,63); font-family: ' Microsoft Yahei '; Font-size:15px;line-height:21.75px;text-align:justify;white-space: Normal;backg

the selected compute node can launch instance the source code on line 95th of the/opt/stack/nova/nova/scheduler/filter_scheduler.py by Select_destinations650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160526-1464216955163061317.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160526-1464217023638093973.jpg "style=" border:0px;white-space:normal;float:none; "/>Nova-compute Performing ActionsThe process of Nova-compute execution