CN103763367A - Method and system for designing distributed virtual network in cloud calculating data center - Google Patents
Method and system for designing distributed virtual network in cloud calculating data center Download PDFInfo
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Abstract
The invention provides a method and system for designing a distributed virtual network in a cloud calculating data center. The method and system are applied to the technical field of cloud calculation. The method includes the following steps: creating a distributed virtual switch, wherein the distributed virtual switch is composed of a plurality of OpenFlow virtual switch bodies, an OpenFlow controller and a physical switch port; enabling the OpenFlow virtual switch bodies to be in communication with the OpenFlow controller according to preset strategies. According to the method, the distributed virtual switch is created based on the SDN thought and particularly achieved through the OpenFlow protocol. The whole data center is configured by the distributed virtual switch in a concentrated mode through the OpenFlow controller, virtual switch networking is accordingly simplified, and centralized management and intelligent monitoring on the virtual network environment in the cloud calculating data center are achieved.
Description
Technical field
The present invention relates to cloud computing technology field, relate in particular to a kind of cloud computing data center's distributed virtual network design method and system.
Background technology
Virtual switch is an important software entity of cloud computing data center, and it forms a huge virtual resource pond by interconnected to the virtual machine of data center, physical host and physical network device; Virtual switch is responsible for sending data to destination address, the flow direction of packet on Sampling network, and set up intelligent connection session.
Virtual switch can be divided into standard virtual switch and distributed virtual switch, their essential distinction is the scope of its application: standard virtual switch can only be applied to a physical host, do not there is any flexibility, and other main frame can not be shared a virtual switch; Distributed virtual switch can be realized and sharing between multiple physical hosts, and as virtual unit, realizes the connection to physical host and virtual machine between each main frame.Distributed virtual switch is more more flexible than standard virtual switch, All hosts in cluster can be used distributed virtual switch, distributed virtual switch can relatively easily be increased to main frame in the middle of cluster, distributed virtual switch is that whole data center arranges virtual switch from a concentrated interface, thereby simplifying virtual machine network connects, distributed virtual switch can be simplified the network configuration of virtual machine, there is more powerful network monitoring and troubleshooting function, and support some high-level network linkage functions.
Current, distributed virtual switch is not universal in cloud data center, common distributed virtual switch is substantially with regard to two kinds of vmware and citrix, and all need to pay expensive price and could use, for a lot of medium-sized and small enterprises and user, it is the very urgent also very thorny thing of part that the distributed virtual switching network that how to build a kind of cheapness meets the day by day complicated network management of cloud data center.
Software defined network (SDN, Software-defined networking) network equipment control plane is separated to software platform from embedded node, by the network architecture of controller (Controller) the automation control of software-driven, it substitutes the control plane of tradition based on embedded and underaction with the pattern of Freeware; Software defined network is new network control Planar realization method, its adapts to reduce the network demand of network complexity, virtual and cloud computing, the controlled the Internet of a software definition, except more flexibly, by appropriate control algolithm, robustness, operational efficiency and the fail safe of network self will be improved greatly; At present, for the cloud computing data center distributed virtual network struction based on SDN, also there is no a kind of effectively embodiment.
Summary of the invention
The invention provides a kind of cloud computing data center's distributed virtual network design method and system, to address the above problem.
The invention provides a kind of cloud computing data center distributed virtual network design method.Said method comprises the following steps:
Create distributed virtual switch, wherein, described distributed virtual switch is comprised of multiple Openflow virtual switches, OpenFlow controller, physical switch;
Described Openflow virtual switch and described OpenFlow controller, according to preset strategy, communicate.
The present invention also provides a kind of cloud computing data center distributed virtual network design system, comprising: Openflow virtual switch, OpenFlow controller; Openflow virtual switch is connected with OpenFlow controller; Wherein, multiple Openflow virtual switches, OpenFlow controller, physical switch composition distributed virtual switch;
Described Openflow virtual switch and described OpenFlow controller, according to preset strategy, communicate.
The invention discloses a kind of general cloud computing data center distributed virtual network establishing method, the method is based on SDN(Software-defined networking, software defined network) thought structure distributed virtual switch, distributed virtual switch is specifically realized by OpenFlow agreement; Distributed virtual switch passes through the virtual switch of the whole data center of OpenFlow controller centralized configuration, thereby has simplified virtual machine network connection, has realized centralized management and intelligent monitoring to cloud data center virtual network environment; OpenFlow controller can obtain the whole network view, can dynamically prevent that loop from occurring; The reducible virtual machine network configuration of distributed virtual switch, has more powerful network monitoring and troubleshooting function, and supports high-level network linkage function.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Figure 1 shows that the distributed virtual cellular logic structure chart of embodiments of the invention 1;
Figure 2 shows that the cloud data center distributed virtual network topological diagram of embodiments of the invention 2;
Figure 3 shows that the OpenFlow virtual switch structure chart of embodiments of the invention 3;
Figure 4 shows that the Floodlight module composition figure of embodiments of the invention 4;
Figure 5 shows that the distributed virtual network architecture diagram of embodiments of the invention 5;
Figure 6 shows that controller monitoring interface 1 schematic diagram of embodiments of the invention 6;
Figure 7 shows that controller monitoring interface 2 schematic diagrames of embodiments of the invention 7.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
The invention provides a kind of cloud computing data center distributed virtual network design method, comprise the following steps:
Create distributed virtual switch, wherein, described distributed virtual switch is comprised of multiple Openflow virtual switches, OpenFlow controller, physical switch;
Described Openflow virtual switch and described OpenFlow controller, according to preset strategy, communicate.
Wherein, the process of establishment distributed virtual switch is:
By data center's Client section, send and create the instruction of distributed virtual switch, call vCenter interface and in database, create distributed virtual exchanger information;
Add all physical hosts that will use distributed virtual switch, and select to bind the physical host network interface card of virtual switch;
Create distributed ports group.
Wherein, add all physical hosts that will use distributed virtual switch, and select the process of the physical host network interface card that need to bind virtual switch to be:
Creating main frame internal standard virtual switch is local virtual switch, binding standard virtual switch and host network card, and standard virtual switch is connected to OpenFlow controller.
Wherein, while creating distributed ports group on standard virtual switch, specify corresponding vlan number and set VLAN type.
Wherein, created after distributed virtual switch, by vCenter, preserved all details to database.
Wherein, described Openflow virtual switch and described OpenFlow controller are according to preset strategy, and the process communicating is:
OpenFlow switch receives after packet, first on local stream table, searches forwarding target port, if coupling not, package forward to OpenFlow controller, by OpenFlow controller, determine to forward port; Wherein, OpenFlow switch forms by flowing table, escape way and OpenFlow agreement three parts.
Wherein, described stream table is comprised of multiple stream list items, and each stream list item is exactly one and forwards rule.
Wherein, described escape way is to connect the interface of OpenFlow switch to OpenFlow controller, OpenFlow controller is by this interface control and management OpenFlow switch, and OpenFlow controller receives from the event of OpenFlow switch and to OpenFlow switch and sends packet simultaneously.
Wherein, described OpenFlow agreement is used for the standard of the mutual information used between OpenFlow controller and OpenFlow switch of describing and the interface standard of OpenFlow controller and OpenFlow switch; OpenFlow controller is linked up configuration information by standard and the switching node of supporting OpenFlow agreement, and transmitting of determination data Forwarding plane, passes through SSL encrypted transmission between OpenFlow controller and forward node.
OpenFlow is the novel realization of the one of software defined network, has had many manufacturers to release physics and the virtual switch of supporting OpenFlow agreements at present; OpenFlow controller is controlled distributed network node in real time according to practical operating conditions, and distributed network node generates fast-forwarding table, need not carry out complicated intellectual analysis calculating, only needs to carry out forwarded plane function; OpenFlow controller can obtain the whole network view, therefore can dynamically prevent that loop from occurring.When new forward node joins OpenFlow network, automatically from OpenFlow controller, obtain up-to-date network configuration information, complete network automatically perception; OpenFlow controller is based on x86 standard server framework, and powerful calculating ability and characteristic extending transversely have guaranteed control plane autgmentability and economy.OpenFlow has not only increased the efficiency of traditional Forwarding plane, can also represent unique value providing aspect high-level network service, such as many-to-one network virtualization, distributed load equalizing and distributed fire wall or intrusion detection are different from the one-to-many network virtualization pattern of traditional mode very much.
Distributed virtual server is to build distributed virtual switch, distributed virtual switch (is local virtual switch by one group of Openflow virtual switch, also be standard virtual switch), OpenFlow controller (OpenFlow Controller) and some physical switch composition, Openflow virtual switch is realized by Openflow agreement with communicating by letter of OpenFlow controller.
In cloud data center distributed virtual network, OpenFlow controller can be according to respective algorithms, logic, analysis and rule, with software definition canonical form, shift configuration information onto distributed network node, distributed network node is upgraded the forwarding rule of data retransmission plane from OpenFlow controller is accepted specific format rule, completes data retransmission subsequently according to forwarding rule.
OpenFlow controller can be for the network path of each segmentation, and according to a rule " information flow " segmentation, each " information flow " data retransmission is completed by each specific distributed network node; When calculating or storage resources changes, OpenFlow controller is readjusted node configuration rule according to analysis result, so just realizes virtual and the needed automation of system for cloud computing and the dynamic-configuration that becomes more meticulous management.
Distributed virtual network configuration design: distributed virtual Internet resources are corresponding with cloud tenant VM, each cloud tenant can see the independently distributed virtual switch across physical node, distributed virtual switch logic structure as shown in Figure 1, for tenant keeper, physical network port is transparent, can only see a distributed virtual switch across multiple physical nodes.
OpenFlow agreement can be set up the forward-path from a VM to an other VM in cloud data center network, on the three-layer network basis between VM and VM, has set up L 2 broadcast territory, i.e. distributed virtual Ethernet switch, as shown in Figure 2.OpenFlow protocol extension three layers of relatively static function, according to data flow Dynamic Establishing load-balancing decision path, and according to the forward-path of virtual switching network configuration change optimum, thereby simplified large-scale data center 3 layer networks, adapt to the requirement of 2 layers of virtual machine mobility.
The characteristic of OpenFlow agreement most critical is exactly to support the control of far-end, has had unified controlling mechanism, and it is controlled that network just becomes real intelligence, in distributed virtual network, after virtual machine moves, when first packet of virtual machine corresponding " information flow " arrives the local virtual telephone net node (OpenFlow virtual switch) after moving, if local virtual telephone net node is not found the forwarding rule of coupling, whole data message can be sent to OpenFlow controller, OpenFlow controller is set home town ruling according to definition rule logic, and be applied to transmitting of local virtual switch and set up new occurrence, " information flow " is afterwards no longer by OpenFlow controller, by local virtual telephone net node, directly forwarded.
OpenFlow switch: OpenFlow switch is one of whole OpenFlow server parts, mainly completes the forwarding of data Layer, the present invention mainly uses OpenFlow vSwitch as OpenFlow switch.Each OpenFlow switch has a stream table, wraps and searches and forward, and OpenFlow switch can be connected to outside OpenFlow controller through an escape way by OpenFlow agreement, and convection current table is inquired about and managed.OpenFlow switch receives after packet, first on local stream table, searches forwarding target port, if coupling not, package forward to OpenFlow controller, by OpenFlow controller, determine to forward port.OpenFlow switch forms by flowing table, escape way and OpenFlow agreement three parts, as shown in Figure 3.
Stream table is the kernel data structure that OpenFlow switch carries out forwarding strategy control, and exchange logic carrys out decision-making and takes suitable behavior to entering the network traffics of OpenFlow switch by searching stream table list item; Stream table is comprised of a lot of stream list items, and each stream list item is exactly one and forwards rule.
Escape way is to connect the interface of OpenFlow switch to OpenFlow controller, OpenFlow controller is by this interface control and management OpenFlow switch, and OpenFlow controller receives from the event of OpenFlow switch and to OpenFlow switch and sends packet simultaneously.
OpenFlow agreement is used for describing the standard of mutual information used between OpenFlow controller and OpenFlow switch, and the interface standard of OpenFlow controller and OpenFlow switch, OpenFlow controller can be linked up configuration information by standard and the switching node of supporting OpenFlow agreement, transmitting of determination data Forwarding plane, passes through SSL encrypted transmission between OpenFlow controller and forward node.
OpenFlow controller Floodlight:OpenFlow has realized the separation of data Layer and key-course, wherein OpenFlow switch carries out the forwarding of data Layer, and OpenFlow controller (OpenFlow Controller) has been realized the function of key-course, OpenFlow controller is controlled the stream table in OpenFlow switch by OpenFlow protocol interface, thereby realize, whole network is carried out to centralized control.
Floodlight is not only an OpenFlow controller, but also is a set of applications being implemented on this controller basis; Floodlight controller has been realized a series of general utility functionss and has been controlled and inquired about OpenFlow network, and the application providing based on Floodlight can solve the network demand of different user.Fig. 4 shown Floodlight controller, be implemented in the Java application module of Floodlight and the relation between the REST API three of Floodlight application is externally provided.When user moves Floodlight, controller and corresponding Java module application set start thereupon, all modules all externally expose REST APIs service by the 8080REST port of acquiescence, and the REST application based on any language development can realize information retrieval and service call to controller by sending http REST instruction.
The present invention is based on Open vSwitch and Floodlight and realized the construction method of cloud computing data center distributed virtual network, cloud computing data center distributed virtual network is by multiple assemblies and module composition, as shown in Figure 5, comprise following assembly and module: Client end, vCenter, Agent, database D B, Openflow switch (Open vSwitch, local virtual switch), controller (Floodlight) and physical switch (being physical host network interface) etc.User Client can be by network service and strategies such as Floodlight control plane Management VLAN, qos policy and ACL.When virtual machine moves or change, corresponding instruction is sent from Client upper strata, by vCenter, call Agent and Floodlight controller commander's virtual switch or physical switches scheduling exchange resource, therefore user Client also can regard the control plane agency of distributed virtual switching network as.
Distributed virtual switch comprises one group of Openflow virtual switch (local virtual switch) and OpenFlow controller, Openflow virtual switch binding physical network interface card connecting virtual machine, Openflow virtual switch is communicated by letter and is realized by Openflow agreement with OpenFlow controller.The important prerequisite that distributed virtual switch is different from standard virtual switch configuration is that all physical host all must be in the middle of a cluster of being managed by vCenter, and needs to consider to use which physical switch (physical host network interface) build distributed virtual switch.Standard virtual switch only has a physical switches mouth to be connected on the port of physical host, and the physical switch of distributed virtual switch is distributed equally, this has guaranteed that distributed virtual switch can be independent of physical host and access identical physical network device.
Creating distributed virtual switch need to complete under the assistance of vCenter and database D B, comprises following steps:
First this process creates main frame internal standard virtual switch (local virtual switch), binding virtual switch and host network card, and standard virtual switch is connected to OpenFlow controller.
For example create the virtual switch of sw by name: ovs-vsctl add-br sw;
Physical network card eth1 is tied to virtual switch sw upper: ovs-vsctl add-port sw eth1
Connection standard virtual switch to controller be OpenFlow controller:
ovs-vsctl?set-controller?sw?tcp:172.16.11.250:6633。
While creating port set, can specify corresponding vlan number simultaneously, generally need to set VLAN type, it can allow for port set and sets VLAN label and joined in the middle of specific VLAN; If port set, for unlabelled flow, is not selected any VLAN type so, this process creates port set successively on all standard virtual switches.
For example: create the port set based on sw, vlan number is 100:ovs-vsctl add-br portgroup-100sw100
For example, by REST API successively configuration standard virtual switch stream table rule, by package forward to 2 port from No. 1 port:
curl-d'{"switch":"00:00:00:00:00:00:00:01","name":"flow-mod-1","priority":"32768","ingress-port":"1","active":"true","actions":"output=2"}'http://172.16.11.250:8080/wm/staticflowentrypusher/json
Step 6: the details of checking whole distributed virtual network by UI interface.
For example open the UI interface of controller, check global network information, as shown in Figure 6 and Figure 7:
http://172.16.11.250:8080/ui/index.html
The present invention also provides a kind of cloud computing data center distributed virtual network design system, comprising: Openflow virtual switch, OpenFlow controller; Openflow virtual switch is connected with OpenFlow controller; Wherein, multiple Openflow virtual switches, OpenFlow controller, physical switch composition distributed virtual switch;
Described Openflow virtual switch and described OpenFlow controller, according to preset strategy, communicate.
The invention discloses a kind of general cloud computing data center distributed virtual network establishing method, the method is based on SDN(Software-defined networking, software defined network) thought structure distributed virtual switch, distributed virtual switch is specifically realized by OpenFlow agreement; Distributed virtual switch passes through the virtual switch of the whole data center of OpenFlow controller centralized configuration, thereby has simplified virtual machine network connection, has realized centralized management and intelligent monitoring to cloud data center virtual network environment; OpenFlow controller can obtain the whole network view, can dynamically prevent that loop from occurring; The reducible virtual machine network configuration of distributed virtual switch, has more powerful network monitoring and troubleshooting function, and supports high-level network linkage function.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a cloud computing data center distributed virtual network design method, is characterized in that, comprises the following steps:
Create distributed virtual switch, wherein, described distributed virtual switch is comprised of multiple Openflow virtual switches, OpenFlow controller, physical switch;
Described Openflow virtual switch and described OpenFlow controller, according to preset strategy, communicate.
2. method according to claim 1, is characterized in that: the process that creates distributed virtual switch is:
By the Client of data center end, send and create the instruction of distributed virtual switch, call vCenter interface and in database, create distributed virtual exchanger information;
Add all physical hosts that will use distributed virtual switch, and select to bind the physical host network interface card of virtual switch;
Create distributed ports group.
3. method according to claim 2, is characterized in that: add all physical hosts that will use distributed virtual switch, and select the process of the physical host network interface card that need to bind virtual switch to be:
Creating main frame internal standard virtual switch is local virtual switch, binding standard virtual switch and host network card, and standard virtual switch is connected to OpenFlow controller.
4. method according to claim 3, is characterized in that:
While creating distributed ports group on standard virtual switch, specify corresponding vlan number and set VLAN type.
5. method according to claim 4, is characterized in that: created after distributed virtual switch, by vCenter, preserved all details to database.
6. method according to claim 1, is characterized in that: described Openflow virtual switch and described OpenFlow controller are according to preset strategy, and the process communicating is:
OpenFlow switch receives after packet, first on local stream table, searches forwarding target port, if coupling not, package forward to OpenFlow controller, by OpenFlow controller, determine to forward port; Wherein, OpenFlow switch forms by flowing table, escape way and OpenFlow agreement three parts.
7. method according to claim 6, is characterized in that:
Described stream table is comprised of multiple stream list items, and each stream list item is exactly one and forwards rule.
8. method according to claim 6, is characterized in that:
Described escape way is to connect the interface of OpenFlow switch to OpenFlow controller, OpenFlow controller is by this interface control and management OpenFlow switch, and OpenFlow controller receives from the event of OpenFlow switch and to OpenFlow switch and sends packet simultaneously.
9. method according to claim 6, is characterized in that:
Described OpenFlow agreement is used for the standard of the mutual information used between OpenFlow controller and OpenFlow switch of describing and the interface standard of OpenFlow controller and OpenFlow switch; OpenFlow controller is linked up configuration information by standard and the switching node of supporting OpenFlow agreement, and transmitting of determination data Forwarding plane, passes through SSL encrypted transmission between OpenFlow controller and forward node.
10. a cloud computing data center distributed virtual network design system, is characterized in that, comprising: Openflow virtual switch, OpenFlow controller; Openflow virtual switch is connected with OpenFlow controller; Wherein, multiple Openflow virtual switches, OpenFlow controller, physical switch composition distributed virtual switch;
Described Openflow virtual switch and described OpenFlow controller, according to preset strategy, communicate.
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