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"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=6

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

/compute/api.py by Unshelve.nova-scheduler Execution SchedulingNova-scheduler the message is received, the appropriate compute node is selected for instance. View Log/opt/stack/logs/n-sch.logAfter screening, the final Devstack-controller is selected launch instance.Nova-scheduler sending MessagesNova-scheduler sends a message telling that 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_destinationsNova-

650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160517-1463494945201028549.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160517-1463495354216062994.jpg "style=" border:0px;float:none; "/>In this section we discuss the two sets of operations, Suspend/resume and Rescue/unrescue.Suspend/resumeSometimes it takes a long time to pause the instance, and you can save the state of instance to the host's disk by Suspend operation. When

-VM1 can already ssh cirros-vm2, but Ping still does not pass, this is consistent with the expectation."Allow SSH" has already worked. At the same time, we also found that firewall rule to enter and exit traffic at the same time, do not distinguish direction. SectionFWaaS is used to enhance the security of the Neutron network, which can be used in conjunction with security groups. Here is a comparison of FWaaS and security groups.Same point: 1. The bottom level is achieved through iptables.Diffe

and VM2.Configure IP for VM1Configure IP for VM2Ping test results: VM1 and VM2 are not.The reasons are as follows: 1. VM2 before you Ping the package to VM1, you need to know the MAC address of the VM1 IP 192.168.100.10. VM2 will broadcast ARP packets on the network, and its role is to ask "who knows what the 192.168.100.10 MAC address is?" "2.ARP is a two-layer protocol, the isolation of VLANs so that ARP can only be broadcast within the VLAN20 rang

We can imagine ImageView can display pictures, and Videoview is used to show the videoTo play a video using Videoview, follow these steps"1" defines videoview in the interface layoutlinearlayout xmlns:android="Http://schemas.android.com/apk/res/android" Xmlns:tools="Http://schemas.android.com/tools"android:layout_width="Match_parent" android:layout_height="Match_parent"android:orientation="Vertical" Tools:context=". Mainactivity ">

://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170813-1502590944556070415.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170813-1502590959621015272.jpg "style=" border:0px;float:none; "/>Because Host1 and Host2 are VirtualBox virtual machines, you also need to set promiscuous mode on the NIC configuration Options page.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170813-1502590944578040770.png "src=" http://7xo6kd

virtual network card tap device Vnet0/vent1 to the same two-tier network, enabling virtual machine VM1 and VM2, and communication between the virtual machine and the extranet.For more detailed information on Linux Bridge, please refer to the section "Pre-knowledge-network virtualization".Configuring Linux-bridge mechanism DriverTo use Linux Bridge in Neutron, you first need to configure Linux-bridge mechanism driver. Neutron uses ML2 as the core plugin by default and is configured in/etc/neutro

/ Upload-ueditor-image-20170726-1501021545647062517.jpg "style=" border:0px;float:none; "/>Currently the current environment is as follows650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170726-1501021447267085122.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20170726-1501021545844047169.jpg "style=" border:0px;float:none; "/>The next section learns how to manage machine.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.cl

-machine/usr/local/bin/docker-machineThe downloaded execution file is put into/usr/local/bin, and the docker-mahine version Validation command is available: > Note: When you see this article, the Docker machine should have an updated version, which can be installed by reference to the official documentation. via tab NBSP; key completion docker-mahine NBSP; 's subcommands and parameters. The installation method is downloaded from Https://github.com/docker/mac

. In addition, if there are some new and valuable features in the core module, I will timing update the tutorial. In addition, what technology satisfies those two choice conditions. If you are sharp enough, believe you will give the answer-the container . Container is another big trend of cloud computing, and the container ecology that builds around Docker is more and more mature, so Cloudman next tutorial is called "5 minutes a day to

. There is a clear distinction between "soft reboot" and "hard reboot" in the Nova-compute log.Lock/unlockTo avoid misoperation, such as accidental restart or removal of instance, instance can be locked. Actions that change state such as instance performed by locking (Lock) are not allowed. Restore normal after performing an unlock (Unlock) operation.Lock/unlock operations are performed in the Nova-api. After the operation succeeds, NOVA-API updates the state of the instance lock. When performin

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 wri

here. Volume_backend_name = NFSRestart Cinder-volume,cinder Service-list confirm that the NFS Cinder-volume service is working correctly.Create the NFS volume type.Open the GUI page, Volume Types, Volumes, System, admin, click "Create Volume Type".Name NFS, click "Create Volume Type".Select NFS Volume TYEP, click the drop-down menu "View Extra Specs"Click "Create", Key input volume_backend_name; Value input NFS.NFS Volume provider is ready, the next section we will create volume for NFS backend

Disclaimer: This document is only used for learning and communication purposes and should not be used for any other commercial purposeAuthor: Chaoyang _tonye-mail: [Email protected]Create date:2016-7-18 10:31:15 MondayLast change:2016-7-18 11:31:22 MondayReprint Please specify source: Http://blog.csdn.net/linzhaoloverObjectiveBlockchain development this year is really fast! From the first unfamiliar concept, to now has started in various industries, a spark of great prairie fire. I wish I could

current cluster is to execute kubeadm reset it on each node . You can then initialize the cluster as we did in the "Initializing Master" section of the "Deploying Kubernetes Cluster" chapter earlier. Kubeadm Init--apiserver-advertise-address 192.168.56.105--pod-network-cidr=10.244.0.0/16then follow the documentation https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/ install Canal. The documentation lists the installation methods for various network scenarios:Execute the follow

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 m

;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