CN107885573B - Data flow control method, controller and data center system - Google Patents
Data flow control method, controller and data center system Download PDFInfo
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- CN107885573B CN107885573B CN201610871718.7A CN201610871718A CN107885573B CN 107885573 B CN107885573 B CN 107885573B CN 201610871718 A CN201610871718 A CN 201610871718A CN 107885573 B CN107885573 B CN 107885573B
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Abstract
The invention discloses a data flow control method, a controller and a data center system. The method comprises the following steps: the method comprises the steps that a controller receives an offline notification message sent by a virtual machine management platform, wherein the offline notification message is used for notifying that a first virtual machine is offline; and if determining that no virtual machine is online in the virtual local area network where the first virtual machine is located, the controller instructs all top-of-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network. The invention can realize the management and control of BUM flow forwarding, reduce unnecessary bandwidth waste and realize the flow optimization of the data center.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a controller, and a data center system for controlling data traffic.
Background
Data centers are used to speed up the transfer of information over the internet infrastructure, and are gradually migrating to large two-tier technologies and virtualization in order to accommodate the growth of traffic and reduce maintenance costs.
The virtualization technology of the data center mainly comprises three aspects: network virtualization, storage virtualization, and server virtualization. Server virtualization technology can decouple operating systems and application programs inside a server from underlying hardware, and through dedicated virtualization software management, a physical server can virtualize multiple Virtual Machines (VMs), thereby enabling multiple VMs to share the same physical server hardware, and also enabling a VM to migrate from one physical server to another while maintaining continuous service availability.
With the development of data centers, the data volume of the data centers is also increasing, and effective control of data traffic is increasingly important for the data centers, while the replication and forwarding of large two-layer network broadcast, unknown unicast and multicast (burst) traffic of the data centers occupy a large amount of bandwidth, and the replication and forwarding of unnecessary burst traffic will cause a large amount of bandwidth to be wasted.
Therefore, how to realize the management and control of the BUM traffic, reduce unnecessary bandwidth waste, and realize the traffic optimization of the data center is a problem to be researched and solved urgently.
Disclosure of Invention
The application provides a data traffic control method, a controller and a data center system, which are used for realizing the control of BUM traffic, reducing unnecessary bandwidth waste and realizing the traffic optimization of a data center.
In a first aspect, a method for controlling data traffic is provided, where the method includes:
the method comprises the steps that a controller receives an offline notification message sent by a virtual machine management platform, wherein the offline notification message is used for notifying that a first virtual machine is offline;
and if determining that no virtual machine is online in the virtual local area network where the first virtual machine is located, the controller instructs all top-of-rack switches configured with the virtual local area network to stop forwarding broadcast, unknown unicast and multicast BUM traffic to the virtual local area network.
It can be seen that, according to the scheme provided by the application, the controller can instruct all the top-of-rack switches configured with the offline virtual machine to stop forwarding the BUM traffic to the virtual local area network when judging whether any virtual machine is not online in the virtual local area network where the offline virtual machine is located based on the offline notification message sent by the virtual machine management platform, so that unnecessary copy forwarding of the BUM traffic can be avoided, effective management and control over the BUM traffic forwarding are realized, unnecessary bandwidth waste is reduced, and the purpose of optimizing the traffic of the data center is achieved.
With reference to the first aspect, in a first possible implementation of the first aspect, after the controller instructs all top-of-rack switches configured with the virtual local area network to stop forwarding BUM traffic to the virtual local area network, the method further includes:
the controller receives an online notification message sent by the virtual machine management platform, wherein the online notification message is used for notifying that a second virtual machine is online;
when the controller determines that the second virtual machine is located in the virtual local area network and the state of the virtual local area network is offline, the controller indicates all top-of-rack switches configured with the virtual local area network to forward BUM traffic to the virtual local area network.
According to the scheme provided by the application, the controller can indicate all the top switches configured with the virtual local area network to forward the BUM flow to the virtual local area network based on the online notification message sent by the virtual machine management platform when the state of the virtual local area network where the online virtual machine is located is judged to be offline, so that the BUM flow can be copied and forwarded as required, effective control over BUM flow forwarding is realized, and the purpose of optimizing the flow of the data center is further achieved.
With reference to the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the instructing, by the controller, all top-of-rack switches configured with the virtual local area network to forward BUM traffic to the virtual local area network includes:
the controller sets the state of the virtual local area network to be online;
the controller sends an online instruction to all the top-of-rack switches, the online instruction comprises the identifier of the virtual local area network, and the online instruction is used for indicating all the top-of-rack switches to set the state of the virtual local area network to be online and forwarding the BUM flow to the virtual local area network.
With reference to the first aspect, the first possible implementation of the first aspect, or the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the instructing, by the controller, all top-of-rack switches configured with the virtual local area network to stop forwarding BUM traffic to the virtual local area network includes:
the controller sets the state of the virtual local area network to be offline;
the controller sends an offline indication to all the top switches, the offline indication comprises the identification of the virtual local area network, and the offline indication is used for indicating that all the top switches set the state of the virtual local area network to be offline and stopping forwarding BUM flow to the virtual local area network.
In a second aspect, a controller for data traffic is provided, comprising:
the virtual machine management platform comprises a receiving unit, a sending unit and a receiving unit, wherein the receiving unit is used for receiving an offline notification message sent by the virtual machine management platform, and the offline notification message is used for notifying that a first virtual machine is offline;
and an indicating unit, configured to indicate all top-of-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network when it is determined that no virtual machine is online in the virtual local area network where the first virtual machine is located according to the offline notification message received by the receiving unit.
It can be seen that, the controller provided in the present application can instruct all top-of-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network when determining whether any virtual machine is online in the virtual local area network where the offline virtual machine is located based on the offline notification message sent by the virtual machine management platform, so as to avoid the unnecessary copy forwarding of the BUM traffic, implement effective control on the BUM traffic forwarding, reduce unnecessary bandwidth waste, and achieve the purpose of adjusting the traffic of the data center.
With reference to the second aspect, in a first possible implementation of the second aspect, the receiving unit is further configured to: receiving an online notification message sent by the virtual machine management platform, wherein the online notification message is used for notifying that a second virtual machine is online;
the indicating unit is further configured to: when the second virtual machine is determined to be located in the virtual local area network according to the online notification message received by the receiving unit and the state of the virtual local area network is offline, the controller indicates all top-of-rack switches configured with the virtual local area network to forward BUM flow to the virtual local area network.
It can be seen that, the controller provided by the application can instruct all the top-of-rack switches configured with the virtual local area network to forward the BUM traffic to the virtual local area network when judging that the state of the virtual local area network where the online virtual machine is located is offline based on the online notification message sent by the virtual machine management platform, so that the BUM traffic can be copied and forwarded as required, effective management and control on the BUM traffic forwarding can be realized, and the purpose of adjusting and optimizing the traffic of the data center is achieved.
With reference to the first possible implementation of the second aspect, in a second possible implementation of the second aspect, the indicating unit is specifically configured to: setting the state of the virtual local area network to be online; and the number of the first and second groups,
and sending an online instruction to all the top-of-rack switches, wherein the online instruction comprises the identifier of the virtual local area network, and the online instruction is used for indicating all the top-of-rack switches to set the state of the virtual local area network to be online and forwarding the BUM flow to the virtual local area network.
With reference to the second aspect, the first possible implementation of the second aspect, or the second possible implementation of the second aspect, in a third possible implementation of the second aspect, the indicating unit is specifically configured to:
setting the state of the virtual local area network as offline;
and sending an offline indication to all the top switches, wherein the offline indication comprises the identifier of the virtual local area network, and the offline indication is used for indicating that all the top switches set the state of the virtual local area network to be offline and stopping forwarding BUM flow to the virtual local area network.
In a third aspect, a data center system is provided, including: a controller and a virtual machine management platform; the controller is connected with the virtual machine management platform in a communication mode;
the virtual machine management platform is used for sending an offline notification message to the controller when the first virtual machine is offline, wherein the offline notification message is used for notifying that the first virtual machine is offline;
the controller is configured to receive the offline notification message sent by the virtual machine management platform, and determine whether any virtual machine is online in a virtual local area network where the first virtual machine is located when the first virtual machine is determined to be offline according to the offline notification message; and when determining that no virtual machine is online in the virtual local area network where the first virtual machine is located, instructing all top-of-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network.
It can be seen that, in the data center system provided by the application, the controller can instruct all the top-of-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network when judging whether any virtual machine is online in the virtual local area network where the offline virtual machine is located based on the offline notification message sent by the virtual machine management platform, so that the unnecessary copy forwarding of the BUM traffic can be avoided, the effective control on the BUM traffic forwarding is realized, the unnecessary bandwidth waste is reduced, and the purpose of optimizing the data center traffic is achieved.
With reference to the third aspect, in a first possible implementation of the third aspect, the system further includes: a top-of-rack switch;
the top-of-rack switch is used for receiving an online instruction sent by the controller, wherein the online instruction comprises an identifier of the virtual local area network, setting the state of the virtual local area network to be online according to the online instruction, and forwarding the BUM flow to the virtual local area network; and the controller is used for receiving an offline indication sent by the controller, wherein the offline indication comprises an identifier of the virtual local area network, setting the state of the virtual local area network as offline according to the offline indication, and stopping forwarding the BUM flow to the virtual local area network.
It can be seen that, in the data center system provided by the application, the top-rack switch can forward the BUM traffic to the virtual local area network whose state is set to be online based on the online indication sent by the controller, and stops forwarding the BUM traffic to the virtual local area network whose state is set to be offline based on the offline indication sent by the controller, so that the BUM traffic can be copied and forwarded as required, effective management and control over the BUM traffic forwarding are achieved, and the purpose of adjusting and optimizing the data center traffic is achieved.
With reference to the third aspect or the first possible implementation of the third aspect, in a second possible implementation of the third aspect, the system further includes: a host; the host is used for creating and running a plurality of virtual machines;
the virtual machine management platform is specifically configured to: managing the virtual machines on the host machine, and notifying the controller of a change in state of the virtual machines on the host machine.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of an example of a data center system and a network architecture according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a business process corresponding to an online VM in a data center system;
fig. 3 is a flow chart illustrating a method for controlling data traffic according to some embodiments of the present invention;
fig. 4 is a schematic flow chart illustrating a management and control process of BUM traffic executed by a controller after a VM is online in some embodiments of the present invention;
fig. 5 is a schematic flow chart illustrating a management and control process of BUM traffic executed by a controller when a VM is shut down or hibernated in some embodiments of the present invention;
fig. 6 is a schematic diagram of a controller for data traffic according to some embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A data center can be considered as a data center architecture in which computing, storage, and network resources are shared by multiple tenants. After computing resources are virtualized, a network needs to provide a larger-range two-layer domain, and a virtual Extensible local area network (VXLAN) technology provides a logical two-layer network on the basis of a traditional network, so that flexible migration and resource integration of a Virtual Machine (VM) are adapted, and decoupling of application and a physical network is realized. VXLAN also introduces three-layer IP multicast to replace ethernet broadcast, allowing BUM traffic to be transmitted in a virtual network by broadcast.
However, in a data center heterogeneous virtualization scenario, a large amount of bandwidth is occupied by a large two-layer BUM traffic of the data center, and the control of the BUM traffic is less involved in the existing technical scheme, especially in a VM shutdown or hibernation scenario, a top-rack switch in a data center system still forwards the BUM traffic to a virtual local area network where a shutdown or hibernation virtual machine is located, which causes a defect that a large amount of bandwidth is wasted.
In view of the lack of management and control measures for the BUM traffic in the prior art, embodiments of the present invention provide a control method, a controller, and a data center system for data traffic, so as to provide a management and control scheme for the BUM traffic of a large two-tier data center, implement relatively fine management and control of the BUM traffic, enable the BUM traffic of the large two-tier data center to be copied and forwarded as needed, thereby avoiding unnecessary bandwidth waste, and implement traffic optimization of the data center.
The control scheme of the data flow provided by the embodiment of the invention can determine the state of the virtual local area network where the virtual machine is located based on the state change of the virtual machine, so that the top rack switch can determine whether to stop forwarding the BUM flow to the virtual local area network according to the state of the virtual local area network configured on the top rack switch, and relatively fine control of the BUM flow is realized, so that the BUM flow of a large two-layer network of a data center can be copied and forwarded as required, the defect that the network bandwidth is occupied greatly due to the fact that the current data center lacks control over the forwarding of the BUM flow is avoided, and the flow of the data center is adjusted and optimized.
The following describes a control scheme of data traffic provided by an embodiment of the present invention with reference to the drawings.
Fig. 1 shows an example of a data center system and a network architecture diagram provided by an embodiment of the present invention.
As shown in fig. 1, a data center system 101 includes a controller 1011 and a virtual machine management platform 1012. Among them, the exemplary network architecture shown in fig. 1 further includes top-of-rack (ToR) switches 102 (such as ToR1, ToR2, and ToR3 shown in fig. 1) and hosts (Host)103 (such as Host1, Host2, and Host3 shown in fig. 1).
A virtual machine is understood to be a software computer running an operating system and an application program, which is virtualized on a host by virtualization technology. A virtual machine contains a set of specifications and configuration files that are supported by the physical resources of the host machine. Different virtual machines can independently run different operating systems and multiple application programs in parallel on the same host.
The host 103 may be a physical server (e.g., a physical blade server) having physical processors, memories, storages and resources. Multiple virtual machines may be created and run on host machine 103 through virtualization techniques. When two or more hosts 103 are combined and operated and managed as a whole, the aggregated computing and memory resources form a cluster, providing a collection of resources in a virtual environment. Creating a virtual machine may be considered as assigning it to a host, cluster or pool of resources, as well as to a data storage and data storage cluster. For example, for hosts Host1 and Host2 shown in fig. 1, virtual machines VM1 and VM2 are created on Host1, and virtual machines VM3 and VM4 are created on Host 2.
Wherein the top-of-rack switch 102 may be deployed on a rack. The top-of-rack switch may be configured to route or forward communication messages between hosts in a rack unit and other network elements, while communication between virtual machines on one host may be accomplished through a virtual switch (vSwitch). Specifically, each host may deploy one or more virtual switches, which can implement routing, switching, and other network communication functions like a physical switch, and may be used to implement communication between multiple virtual machines in one host and connect the virtual machines in the host with a physical environment.
A Virtual Distributed Switch (VDS) is mainly used to solve the problem of an excessive number of virtual switches in a cluster, and compared with a single virtual switch, the VDS can simultaneously cover multiple hosts, and can achieve efficient management. One end of the VDS provides the PG to connect to the virtual machine, and one VDS may have multiple PGs and the other end provides the Uplink (Uplink) to connect to the physical ethernet adapter. The virtual machines may be connected to a Port Group (PG) via a virtual network card and may be connected to the physical environment via a physical ethernet adapter connected to the VDS uplink. For example, for the hosts Host1 and Host2 shown in fig. 1, the virtual machines VM1 and VM2 on the Host1 are connected to the PG1 through virtual network cards, the virtual machines VM3 and VM4 on the Host2 are connected to the PG2 through virtual network cards, the virtual distributed switch VDS1 spans the hosts Host1 and Host2 and is connected to the PG1 and PG2 respectively, so that the virtual machines are connected to the physical environment through physical ethernet adapters connected to the VDS1 uplink, that is, the virtual machines VM1 and VM2 are connected to the TOR1 configured with the virtual local area network VLAN1, and the virtual machines VM3 and VM4 are connected to the TOR2 configured with the virtual local area network VLAN 2.
Specifically, as shown in fig. 1, a communication connection is established between a controller 1011 and a virtual machine management platform 1012 in the data center system 101. For example, the controller 1011 and the virtual machine management platform 1012 may establish a communication connection through an interface (such as a JAVA SDK interface) and based on a handshake mechanism, thereby implementing information interaction.
Specifically, the controller 1011 in the data center system 101 is mainly used for managing the network domain, such as issuing network configuration or network policy to the top of rack switch 102 and to the virtual machine management platform 1012; the virtual machine management platform 1012 is mainly used to manage computing domains, such as managing host 103 resources and managing virtual network objects such as virtual machines and virtual switches.
The controller 1011 may automatically discover the location information of the host 103 through a Link Layer Discovery Protocol (LLDP), and issue a mapping relationship between a network and a service orchestration binding virtual local area network (vlan) and a Port Group (PG); furthermore, on one hand, virtual local area network entries, network policies, and the like may be issued to the top-rack switch 102 to configure a virtual local area network for the top-rack switch 102; on the other hand, the virtual machine management platform 1012 may be notified of the mapping relationship between the virtual local area network and the PG through a communication connection with the virtual machine management platform 1012, and the virtual machine management platform 1012 allocates the host machine 103 resources to create and manage the virtual machine.
The virtual machine management platform 1012 may add resources of multiple hosts 103 into a pool, manage the physical resources, create and manage a virtual network object according to network configuration issued by the controller 1011, and notify the controller 1011 of a change in the state of the virtual network object in time. Such as specifically including managing the allocation of virtual machines to these resources, allocating resources to virtual machines within a given host, sensing events for the virtual machines to go online, offline, and migrate, and notifying the controller 1011 of the sensed events, etc.
Specifically, the information interacted between the controller 1011 and the virtual machine management platform 1012 through the established communication connection may include a command about virtual network configuration, creation and maintenance of a virtual network object, and the like issued by the controller 1011 to the virtual machine management platform 1012, and a notification message about a state of the virtual network object, and the like sent by the virtual machine management platform 1012 to the controller 1011.
Specifically, in the data center system provided in some embodiments of the present invention, in order to implement management and control on BUM traffic, the virtual machine management platform 1012 may send an offline notification message to the controller 1011 when sensing that a virtual machine is offline, so as to notify that a virtual machine is offline; after receiving the offline notification message, the controller 1011 may instruct all top switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network if it is determined that no virtual machine is online in the virtual local area network where the offline virtual machine is located according to the offline notification message.
Further, the virtual machine management platform 1012 may also send an online notification message to the controller 1011 to notify that a virtual machine is online when sensing that the virtual machine is online; after receiving the online notification message, the controller 1011 may instruct all top-of-rack switches configured with the virtual local area network to retransmit BUM traffic to the virtual local area network if it is determined from the online notification message that the online virtual machine is located in the virtual local area network that was previously determined that no virtual machine is online.
It should be noted that the data center system 101 in the network architecture shown in fig. 1 is only one example of a data center system in some embodiments of the present invention, and in some embodiments of the present invention, the data center system may further include a top-of-rack switch, i.e., yet another example of a data center system may include a top-of-rack switch 102, a controller 1011, and a virtual machine management platform 1012 as in fig. 1;
specifically, in the data center system including the top-of-rack switch provided in some embodiments of the present invention, when it is necessary to instruct all top-of-rack switches configured with a virtual local area network to stop forwarding BUM traffic to the virtual local area network, the controller may send, to the top-of-rack switch, an offline instruction including an identifier of the virtual local area network, and when it is necessary to instruct all top-of-rack switches configured with the virtual local area network to retransmit BUM traffic to the virtual local area network, may send, to the top-of-rack switch, an online instruction including an identifier of the virtual local area network; when the top-of-rack switch receives an online instruction sent by the controller, the state of the virtual local area network can be set to be online according to the identifier of the virtual local area network included in the online instruction, and the BUM flow is forwarded to the virtual local area network; when receiving an offline indication sent by the controller, the controller may set the status of the virtual local area network as offline according to the identifier of the virtual local area network included in the offline indication, and stop forwarding the BUM traffic to the virtual local area network.
In some embodiments of the present invention, the data center system may further include a host, i.e., in yet another example of the data center system, may include the host 103, the controller 1011, and the virtual machine management platform 1012 as in fig. 1; alternatively, in yet another example of a data center system may include a top of rack switch 102, a host 103, a controller 1011, and a virtual machine management platform 1012 as in fig. 1.
In particular, in a data center system including a top-of-rack switch provided by some embodiments of the invention, a host may be used to create and run multiple virtual machines, and a virtual machine management platform may manage the virtual machines on the host and notify a controller of a change in state of the virtual machines on the host.
It can be seen that in the data center system 101 shown in fig. 1, the controller 1011 is mainly used for managing a network domain, and the virtual machine management platform 1012 is mainly used for managing a computing domain. Therefore, in an automation scene of the data center system, the cooperative management of the computation and the network can be realized.
As an example, based on the example of the data center system and the network architecture shown in fig. 1, regarding the collaborative management of computing and network implemented by the data center system 101, taking a VM online event as an example, a brief description will be made of a process of implementing VM automatic access to a network by the data center system 101.
Fig. 2 shows a schematic diagram of a business process corresponding to the online VM. As shown in fig. 2, the business process corresponding to the VM online can be summarized as the following steps:
step 201: the controller 1011 manages the virtual machine management platform 1012 devices, and the controller 1011 and the virtual machine management platform 1012 handshake establish a link.
Step 202: the controller 1011 automatically discovers the location information of the physical host through the LLDP.
Step 203: the controller 1011 issues a network, and the controller 1011 orchestrates a mapping relationship of a bound network and a Port Group (PG).
Step 204: the controller 1011 pushes the mapping relationship between the Port Group (PG) and the VLAN to the virtual machine management platform 1012.
Step 205: the virtual machine management platform 1012 issues VMs, VM online events notify the controller 1011, and the controller 1011 performs virtual awareness to automatically open the physical network.
Specifically, in step 205, the virtual machine management platform 1012 notifies the controller 1011 of the VM online event through a link established with the controller 1011, the controller 1011 sends a VM online message to the top rack switch 102, the top rack switch 102 stores information such as Media Access Control (MAC) of the VM, the controller 1011 divides a policy template according to the service type and the tenant, maintains and issues the policy template applied by the VM, and the top rack switch deploys and configures a network policy, so that when the virtual machine is online on the top rack switch 102, the network policy is applied to the virtual machine, thereby controlling the traffic and Access of the virtual machine through the top rack switch 102.
VM offline is similar to the above, the VM offline event is notified to the controller 1011 by the VM management platform 1012, and then the controller 1011 notifies the top of rack switch 102 to delete the corresponding VM and its policy information. The VM migration is completed through two parts of the original VM offline and the new VM online.
The controller 1011 enables the creation, configuration, and awareness of the virtual topology and deployment of network policies for virtual machines through interaction with the virtual machine management platform 1012, and with the top of rack switch 102. When the virtual machine goes online, goes offline, and migrates, the controller 1011 can sense in time and notify the top of rack switch 102 to adjust the network policy in real time. Most east-west traffic in the data center (e.g., typically 80% east-west traffic in some scenarios) will access the VXLAN tunnel big two-tier network of the data center network through the VM by the above-described service flow steps corresponding to the VM being online.
The control scheme of the data flow provided by the embodiment of the invention mainly realizes the more refined control of the rotation of the BUM flow by the top rack switch configured with the virtual local area network after the state of the virtual local area network where the virtual machine is located is determined by the controller through monitoring and informing the state of the virtual machine by the virtual machine management platform, so that the top rack switch can stop forwarding the BUM flow to the virtual local area network when the online virtual machine does not exist in the configured virtual local area network, and the BUM flow is retransmitted to the virtual local area network when the online virtual machine reappears in the virtual local area network, thereby realizing the copy of the BUM flow of two layers in a data center as required and realizing the flow optimization of the data center.
Fig. 3 is a flow chart illustrating a method for controlling data traffic according to some embodiments of the present invention. The process can be implemented by a controller, where the controller may specifically refer to software or a combination of software and hardware that has functions of interfacing with a virtual machine management platform, cooperatively implementing network policy issuing and adjusting, and integrating physical network management, virtual network management, service chain arrangement, and the like.
For example, based on the data center system example shown in fig. 1, the controller shown in the flow of fig. 3 may specifically be the controller 1011 in the data center system 101 shown in fig. 1, and correspondingly, the virtual machine management platform shown in the flow of fig. 3 may specifically be the virtual machine management platform 1012 in the data center system 101 shown in fig. 1.
It should be noted that "first" in "first virtual machine" in the description of the present application is merely for convenience of description, and does not have a limiting effect on the virtual machine; similarly, the "second" in the "second virtual machine" is also merely for convenience of description, and does not have a limiting effect on the virtual machine.
As shown in fig. 3, a flow of a method for controlling data traffic according to some embodiments of the present invention includes the following steps:
step 301: the controller receives an offline notification message sent by the virtual machine management platform, wherein the offline notification message is used for notifying that the first virtual machine is offline.
Step 302: and if the controller determines that no virtual machine is online in the virtual local area network where the first virtual machine is located, the controller instructs all top-of-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network.
The virtual machine being offline may specifically refer to shutdown or sleep of the virtual machine. Accordingly, the offline notification message sent by the virtual machine management platform to the controller in step 301 may be sent when the virtual machine management platform detects that the virtual machine is powered off or dormant.
Specifically, the offline notification message sent by the virtual machine management platform to the controller may carry information such as a name, an ID, and a location of the offline virtual machine, so that after receiving the offline notification message, the controller can determine the offline virtual machine notified by the offline notification message, and further can determine a virtual local area network where the offline virtual machine is located based on the information of the offline virtual machine; therefore, whether the determined offline virtual machine is still online in the virtual local area network can be judged.
In some embodiments of the present invention, the controller may query a local database according to the information of the offline virtual machine determined by the offline notification message, where the local database may be a database storing a correspondence between the virtual machine and a virtual local area network where the virtual machine is located, so as to determine the virtual local area network where the offline virtual machine is located; meanwhile, the database can also store the state of the virtual machine, and the controller can further judge whether the virtual machine is online in the virtual local area network by inquiring the state of the virtual machine corresponding to the virtual local area network in the database.
For example, the controller may store a notification message about the state of the virtual machine sent by the virtual machine management platform, so as to continuously update the state of each virtual machine stored in the local database and the corresponding relationship between each virtual machine and the virtual lan where the virtual machine is located, thereby performing the above determination and judgment processes.
Further, in some embodiments of the present invention, the controller may also set status parameters for the virtual local area network. Specifically, the controller may set the state of the virtual local area network to offline when it is determined that there is no virtual machine online in a virtual local area network, and set the state of the virtual local area network to online when it is determined that there is an online virtual machine in a virtual local area network; for example, the lower line may be represented by 0, and the upper line by 1; or offline and online can be used for offline and online respectively.
Specifically, when the controller determines in step 302 that no virtual machine is online in the virtual local area network where the offline virtual machine is located, the controller may, but is not limited to, instruct all top-rack switches configured with the virtual local area network to stop forwarding BUM traffic to the virtual local area network by means of a configuration message or a command, for example.
Considering that the controller described in the foregoing embodiment may set the status parameter to the virtual local area network, in some embodiments of the present invention, when the controller determines in step 302 that no virtual machine is online in the virtual local area network where the offline virtual machine is located, the status of the virtual local area network may be set to offline (for example, expressed by offline).
Further, the controller may generate an offline indication carrying the identifier of the virtual lan, so that all the top switches configured with the virtual lan set the state of the virtual lan to be offline according to the offline indication by sending the offline indication to all the top switches configured with the virtual lan, and stop forwarding the BUM traffic to the virtual lan.
Specifically, any one of the top-of-rack switches configured with the virtual local area network may implement multicast routing pruning by setting the state of the virtual data local area network to be offline, that is, the BUM traffic is not forwarded to the virtual local area network whose state is offline any more, so as to save network bandwidth, avoid unnecessary copy forwarding of the BUM traffic, and implement the purpose of adjusting and optimizing the traffic of the data center.
Further, in some optional embodiments of the present invention, the controller may continuously monitor the notification message about the state of the virtual machine sent by the virtual machine management platform after instructing, through step 302, the top-of-rack switch configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network.
Accordingly, the virtual machine management platform can send an online notification message to the controller when detecting that the virtual machine is online. The virtual machine online specifically may refer to startup or wake-up of the virtual machine.
Correspondingly, the online notification message sent by the virtual machine management platform to the controller may also carry information such as the name, ID, and location of the online virtual machine, so that after receiving the online notification message, the controller can determine the virtual local area network where the online virtual machine is located. Specifically, the content carried by the online notification message may be similar to the offline notification message described above.
Specifically, when receiving an online notification message sent by the virtual machine management platform, the controller may determine, according to the online notification message, an online virtual machine notified by the online notification message, and further may determine, based on information of the online virtual machine, a virtual local area network in which the online virtual machine is located, so as to determine whether the virtual local area network is a virtual local area network in which it is previously determined that no virtual machine is online, or may also determine whether the online virtual machine is a virtual machine that is only online in the virtual local area network in which the online virtual machine is located.
Accordingly, in some embodiments of the present invention, the controller also performs the above determining and judging processes by querying the local database, which may be referred to the foregoing description and will not be described herein again.
Considering that the controller described in the foregoing embodiment may set a status parameter for a virtual local area network, in some embodiments of the present invention, through the process shown in fig. 3, after determining that no virtual machine is online in a virtual local area network, the controller will set the status of the virtual local area network as offline, and instruct all top-of-rack switches configured with the virtual local area network to stop forwarding BUM traffic to the virtual local area network; furthermore, if the controller determines that the current state of the virtual local area network in which the online virtual machine is located is offline after receiving the online notification message, the controller may instruct all top-of-rack switches configured with the virtual local area network to retransmit the BUM traffic to the virtual local area network. In particular, the controller may instruct, but is not limited to instructing, all top-of-rack switches configured with the virtual local area network to re-forward BUM traffic to the virtual local area network, such as by way of a configuration message or command.
Accordingly, after receiving the online notification message, if it is determined that the current state of the virtual local area network in which the online virtual machine is located is offline, the controller may set the state of the virtual local area network to be online (for example, represented by an online).
Further, the controller may generate an online indication carrying the identifier of the virtual local area network, so that all the top-of-rack switches configured with the virtual local area network set the state of the virtual local area network to be online according to the online indication by sending the online indication to all the top-of-rack switches configured with the virtual local area network, and forward the BUM traffic to the virtual local area network.
Correspondingly, any top-of-rack switch configured with the virtual local area network can realize multicast routing grafting by setting the state of the virtual data local area network to be online, namely, the BUM flow is retransmitted to the virtual local area network of which the state is changed from offline to online, so that the BUM flow of a large two-layer network is copied and forwarded as required, and the purpose of adjusting and optimizing the flow of a data center is realized.
Considering that the virtual machine migration can be understood as being completed by two parts, namely, the original virtual machine is offline and the new virtual machine is online, although the foregoing embodiment mainly describes a process of controlling the BUM data traffic executed by the controller for the offline or online event of the virtual machine, the control process of the data traffic described in the foregoing embodiment is also applicable to the case of the virtual machine migration event.
As an example, based on the service flow of VM online shown in fig. 2, in a scenario where a control scheme of data traffic provided by some embodiments of the present invention is exemplarily applied, after a VM is online, a control process of BUM traffic by a controller is described below.
Specifically, based on the VM online service flow shown in fig. 2, fig. 4 shows a management and control flow of BUM traffic executed by the controller after the VM is online in some embodiments of the present invention. For completeness of the flow description, fig. 4 also shows a related service flow of VM online, which specifically refers to the foregoing description of step 201 and step 205 in the VM online service flow shown in fig. 2, and will not be described again here.
Similarly to fig. 2, after the execution of the service flow corresponding to the online VM is completed (step 201-step 205), most of the eastern and western traffic in the data center will be able to access the VXLAN tunnel large two-layer network of the data center network through the VM. Based on steps 201 to 205, fig. 4 further shows an execution process of the control scheme of data traffic provided by some embodiments of the present invention after the execution of the online service flow in the VM is completed:
the process 401: when a VM is powered off or is dormant (offline), the VM management platform 1012 notifies the controller 1011 through an event, after the controller 1011 receives an offline notification message sent by the VM management platform 1012, the controller 1011 determines whether an online VC exists in a VLAN where the offline VC is located, and if it is determined that no online VM exists in the VLAN, the controller 1011 instructs the top switch configured with the VLAN to stop forwarding BUM traffic to the VLAN.
In some embodiments of the invention, the specific implementation of process 401 may be described as follows:
under the condition that the VM is powered off or dormant, the VM management platform 1012 notifies the controller 1011 through an event, and the controller 1011 sets the state of the VLAN as offline according to an offline notification message sent by the VM management platform 1012, if it is determined that no VM is online in the VLAN where the VM is located, and sends an offline indication including the VLAN identifier to the top switch configured with the VLAN to indicate that the top switch configured with the VLAN sets the state of the VLAN as offline, so that the top switch configured with the VLAN can perform multicast routing pruning and stop forwarding BUM traffic to the VLAN under the condition that the VLAN state is offline, thereby avoiding forwarding of unnecessary BUM traffic of a large layer two network and saving network bandwidth.
Accordingly, based on the process 401, the implementation process of the data traffic control scheme provided in some embodiments of the present invention may further include:
the process 402: in the case that a VM is powered on or awakened (on-line), the VM management platform 1012 notifies the controller 1011 through an event, after the controller 1011 receives an on-line notification message sent by the VM management platform 1012, the controller 1011 determines whether a VLAN in which the on-line VM is located is a VLAN determined by the process 401 to not include any on-line VM (or may be understood as a VLAN which does not include any on-line VM before the VM comes on-line), and if the determination is yes, the controller 1011 instructs the top-rack switch configured with the VLAN to forward BUM traffic to the VLAN.
Accordingly, in some embodiments of the invention, the specific implementation of process 402 may be described as follows:
under the condition that a VM is powered on or awakened, a virtual machine management platform 1012 notifies a controller 1011 through an event, and the controller 1011 changes the state of the VLAN to be online if it is determined that only the online VM is online in the VLAN (that is, the VLAN does not have any online VM before the VM is online) according to an online notification message sent by the virtual machine management platform 1012, so that the top rack switch configured with the VLAN can perform multicast routing grafting and forward BUM traffic to the VLAN when determining that the state of the VLAN is online, thereby implementing on-demand replication of BUM traffic of a large two-layer network in a data center and saving network bandwidth.
Fig. 5 shows an example flow diagram of a specific implementation of the above-described process 401.
It can be seen that, unlike the prior art, which does not have the drawback of fine control over the forwarding of BUM traffic, the shutdown or hibernation (501) of the VM triggers the virtual machine management platform to notify the controller (502), further making the controller determine if there is no VC online in the VLAN where the offline VC is (503), upon determining that no VC is online, the controller may set the VLAN status to offline (504A), instructing the top-of-rack switch configured with the VLAN to set the status of the VLAN to down-line (505A), thereby stopping forwarding BUM traffic to the VLAN (506A), upon determining that there are any VCs in the VLAN that are still online, the VLAN status is set (or can be understood as maintained) as online (504B), instructing the top-of-rack switch configured with the VLAN to set (or may be understood as holding) the status of the VLAN online (505B), the top-of-rack switch configured with the VLAN will continue to forward BUM traffic to the VLAN (506B).
As can be seen from the above description, in the control scheme of data traffic provided in the embodiment of the present invention, the virtual machine management platform monitors and notifies the controller of the state of the virtual machine, so that the controller realizes a finer control on the rotation of the BUM traffic by the top rack switch configured with the virtual local area network after determining the state of the virtual local area network where the virtual machine is located, so that the top rack switch can stop forwarding the BUM traffic to the virtual local area network when there is no online virtual machine in the configured virtual local area network, and retransmit the BUM traffic to the virtual local area network when an online virtual machine appears again in the virtual local area network, thereby achieving the on-demand copy of two layers of BUM traffic in the data center, reducing unnecessary bandwidth waste, and realizing the traffic optimization of the data center. The control scheme of the data flow provided by the embodiment of the invention can be used as optimization and supplement of a calculation and network cooperative management scheme, is suitable for a data center heterogeneous virtualization scene, and can be used for adjusting and optimizing the data center big two-layer flow in the data center heterogeneous virtualization scene.
Based on the same technical concept, the embodiment of the present invention further provides a controller for data traffic, which can execute the above embodiment of the method for controlling data traffic, and the controller can be applied to the data center example shown in fig. 1 and can be specifically implemented as the controller 1011 in the data center system example shown in fig. 1.
Fig. 6 illustrates a controller of data traffic provided by some embodiments of the invention, as shown in fig. 6, the controller of data traffic including:
a receiving unit 601, configured to receive an offline notification message sent by a virtual machine management platform, where the offline notification message is used to notify that a first virtual machine is offline;
an indicating unit 602, configured to indicate all top-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network when it is determined that no virtual machine is online in the virtual local area network where the first virtual machine is located according to the offline notification message received by the receiving unit.
In some embodiments of the present invention, the receiving unit 601 may further be configured to: receiving an online notification message sent by the virtual machine management platform, wherein the online notification message is used for notifying that a second virtual machine is online;
the indicating unit 602 may further be configured to: when the second virtual machine is determined to be located in the virtual local area network according to the online notification message received by the receiving unit and the state of the virtual local area network is offline, the controller indicates all top-of-rack switches configured with the virtual local area network to forward BUM flow to the virtual local area network.
In some embodiments of the present invention, the indicating unit 602 may specifically be configured to:
setting the state of the virtual local area network to be online;
and sending an online instruction to all the top-of-rack switches, wherein the online instruction comprises the identifier of the virtual local area network, and the online instruction is used for indicating all the top-of-rack switches to set the state of the virtual local area network to be online and forwarding the BUM flow to the virtual local area network.
In some embodiments of the present invention, the indicating unit 602 may specifically be configured to:
setting the state of the virtual local area network as offline;
and sending an offline indication to all the top switches, wherein the offline indication comprises the identifier of the virtual local area network, and the offline indication is used for indicating that all the top switches set the state of the virtual local area network to be offline and stopping forwarding BUM flow to the virtual local area network.
In summary, the flow management and control scheme provided in the embodiment of the present invention can implement finer control on BUM flows, so that large two-tier network BUM flows in a data center can be copied and forwarded as needed, thereby avoiding a defect that a large amount of network bandwidth is occupied due to lack of effective management and control on forwarding of BUM messages in a current data center, implementing flow optimization in the data center, and reducing bandwidth waste.
For a software implementation, the techniques may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A method for controlling data traffic, the method comprising:
the method comprises the steps that a controller receives an offline notification message sent by a virtual machine management platform, wherein the offline notification message is used for notifying that a first virtual machine is offline;
if it is determined that no virtual machine is online in the virtual local area network where the first virtual machine is located, the controller instructs all top-of-rack switches configured with the virtual local area network to stop forwarding broadcast, unknown unicast and multicast BUM traffic to the virtual local area network;
wherein the controller instructs all top-of-rack switches configured with the virtual local area network to stop forwarding BUM traffic to the virtual local area network, including:
the controller sets the state of the virtual local area network to be offline;
the controller sends an offline indication to all the top switches, the offline indication comprises the identification of the virtual local area network, and the offline indication is used for indicating that all the top switches set the state of the virtual local area network to be offline and stopping forwarding BUM flow to the virtual local area network.
2. The method of claim 1, wherein after the controller instructs all top-of-rack switches configured with the virtual local area network to stop forwarding BUM traffic to the virtual local area network, further comprising:
the controller receives an online notification message sent by the virtual machine management platform, wherein the online notification message is used for notifying that a second virtual machine is online;
when the controller determines that the second virtual machine is located in the virtual local area network and the state of the virtual local area network is offline, the controller indicates all top-of-rack switches configured with the virtual local area network to forward BUM traffic to the virtual local area network.
3. The method of claim 2, wherein the controller instructing all top-of-rack switches configured with the virtual local area network to forward BUM traffic to the virtual local area network comprises:
the controller sets the state of the virtual local area network to be online;
the controller sends an online instruction to all the top-of-rack switches, the online instruction comprises the identifier of the virtual local area network, and the online instruction is used for indicating all the top-of-rack switches to set the state of the virtual local area network to be online and forwarding the BUM flow to the virtual local area network.
4. A controller of data traffic, comprising:
the virtual machine management platform comprises a receiving unit, a sending unit and a receiving unit, wherein the receiving unit is used for receiving an offline notification message sent by the virtual machine management platform, and the offline notification message is used for notifying that a first virtual machine is offline;
an indicating unit, configured to indicate all top-of-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network when it is determined that no virtual machine is online in the virtual local area network where the first virtual machine is located according to the offline notification message received by the receiving unit;
wherein, the indication unit is specifically configured to:
setting the state of the virtual local area network as offline;
and sending an offline indication to all the top switches, wherein the offline indication comprises the identifier of the virtual local area network, and the offline indication is used for indicating that all the top switches set the state of the virtual local area network to be offline and stopping forwarding BUM flow to the virtual local area network.
5. The controller of claim 4, wherein the receiving unit is further configured to:
receiving an online notification message sent by the virtual machine management platform, wherein the online notification message is used for notifying that a second virtual machine is online;
the indicating unit is further configured to:
when the second virtual machine is determined to be located in the virtual local area network according to the online notification message received by the receiving unit and the state of the virtual local area network is offline, the controller indicates all top-of-rack switches configured with the virtual local area network to forward BUM flow to the virtual local area network.
6. The controller according to claim 5, wherein the indication unit is specifically configured to:
setting the state of the virtual local area network to be online;
and sending an online instruction to all the top-of-rack switches, wherein the online instruction comprises the identifier of the virtual local area network, and the online instruction is used for indicating all the top-of-rack switches to set the state of the virtual local area network to be online and forwarding the BUM flow to the virtual local area network.
7. A data center system, the system comprising: the system comprises a controller, a virtual machine management platform and a top-of-rack switch; the controller is connected with the virtual machine management platform in a communication mode;
the virtual machine management platform is used for sending an offline notification message to the controller when the first virtual machine is offline, wherein the offline notification message is used for notifying that the first virtual machine is offline;
the controller is configured to receive the offline notification message sent by the virtual machine management platform, and determine whether any virtual machine is online in a virtual local area network where the first virtual machine is located when the first virtual machine is determined to be offline according to the offline notification message; when determining that no virtual machine is online in the virtual local area network where the first virtual machine is located, instructing all top-of-rack switches configured with the virtual local area network to stop forwarding the BUM traffic to the virtual local area network;
the top-of-rack switch is used for receiving an online instruction sent by the controller, wherein the online instruction comprises an identifier of the virtual local area network, setting the state of the virtual local area network to be online according to the online instruction, and forwarding the BUM flow to the virtual local area network; and the controller is used for receiving an offline indication sent by the controller, wherein the offline indication comprises an identifier of the virtual local area network, setting the state of the virtual local area network as offline according to the offline indication, and stopping forwarding the BUM flow to the virtual local area network.
8. The system of claim 7, further comprising: a host; the host is used for creating and running a plurality of virtual machines;
the virtual machine management platform is specifically configured to: managing the virtual machines on the host machine, and notifying the controller of a change in state of the virtual machines on the host machine.
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