CN116094923B - Gateway updating method and device after cloud instance migration and electronic equipment - Google Patents
Gateway updating method and device after cloud instance migration and electronic equipment Download PDFInfo
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- CN116094923B CN116094923B CN202310111338.3A CN202310111338A CN116094923B CN 116094923 B CN116094923 B CN 116094923B CN 202310111338 A CN202310111338 A CN 202310111338A CN 116094923 B CN116094923 B CN 116094923B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/0816—Configuration setting characterised by the conditions triggering a change of settings the condition being an adaptation, e.g. in response to network events
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Abstract
The specification provides a gateway updating method and device after cloud instance migration and electronic equipment. The method comprises the following steps: when a target cloud instance in a first host in an available area is migrated to a second host in the available area, the first host informs a summary cluster of all available areas in the area where the available area is located of relevant information of the target cloud instance; the method comprises the steps that a summarizer cluster in each available area generates migration change information and fast transition more information based on received related information of a target cloud instance, and forwards the migration change information to a gateway cluster in the available area and forwards the fast transition more information to virtual switches in all hosts in the available area; the gateway cluster in each available area updates a locally maintained public network IP routing table and a Nat gateway forwarding table based on the received migration change message; the virtual switch within each host in each available zone updates the locally maintained fast forwarding table based on the received fast transition update message.
Description
Technical Field
The embodiment of the specification relates to the field of cloud computing, in particular to a gateway updating method and device after cloud instance migration and electronic equipment.
Background
With the continuous development of cloud computing, the requirements on virtualized networks in the cloud computing are higher and higher, such as elasticity (scalability), security (security), reliability (privacy) and privacy (privacy), and extremely high requirements on interconnection performance (performance), so that various virtualization technologies are promoted.
The virtualization technology promotes the development of cloud instances, so that resources are reasonably utilized. When cloud instance creation, destruction, migration, deactivation and other operations are performed, the virtualized network is required to be converged rapidly, so that service interruption time is reduced, and a user cannot perceive the difference. The wide application of cloud computing promotes continuous optimization of cloud instance migration, and improving the convergence capability of a network after migration also becomes a bottleneck for breaking through. However, cloud instance migration brings flexibility to workload management and also faces some problems; for example, when a cloud instance is migrated from one host to another host, the connection of an original socket (socket) application on the cloud instance, which communicates with the external network, is interrupted, and an application program cannot provide services to the outside; for example, when the external client has service connection with the migration cloud instance and the cloud instance is migrated to other hosts, the client still uses the network before the cloud instance is migrated to find the host, so that service interruption can be caused.
Because the network can not quickly converge after the cloud instance is migrated, the service is greatly affected, and how to ensure that the network can quickly converge after the cloud instance is migrated, so that the migrated cloud instance can provide the service as soon as possible is a problem to be solved.
Disclosure of Invention
The embodiment of the specification provides a gateway updating method and device after cloud instance migration and electronic equipment. The method and the device are used for solving the problem that the network can not be converged rapidly after the cloud instance is migrated.
According to a first aspect of embodiments of the present disclosure, a gateway updating method after cloud instance migration is provided, which is applied to an available area of cloud instance migration, where the available area is composed of a collector cluster, a gateway cluster and a plurality of hosts; each host consists of a virtual switch and a plurality of cloud instances; the host is connected with the gateway cluster through the summarizer cluster, so that cloud instances in the host communicate with the Internet based on the gateway cluster; the method comprises the following steps:
when a target cloud instance in a first host in the available region is migrated to a second host in the available region, the first host informs a summary cluster of all available regions in the region where the available region is located of relevant information of the target cloud instance;
The method comprises the steps that a summarizer cluster in each available area generates migration change information and fast transition more information based on the received related information of the target cloud instance, forwards the migration change information to a gateway cluster in the available area, and forwards the fast transition more information to virtual switches in all hosts in the available area;
the gateway cluster in each available area updates a locally maintained public network IP routing table and a Nat gateway forwarding table based on the received migration change message;
the virtual switch within each host in each available zone updates the locally maintained fast forwarding table based on the received fast transition update message.
Optionally, the related information of the target cloud instance includes verification information, migration change information and fast transition more information; the verification information comprises a network card type, a network card IP type and a migrated available area of the target cloud instance;
the summarizer cluster generates migration change information and fast transition more information based on the received related information of the target cloud instance, and the method comprises the following steps:
determining whether the network card type of the target cloud instance is a public network type;
if the network card type of the target cloud instance is a public network type, further determining whether the migrated available area and the available area where the collector cluster is located are the same available area, and if the available area is the same available area, generating migration change information based on the migration change information;
If not, further determining whether the network card IP type is IPV4, and if so, generating a fast transition more message based on the fast transition more information.
Optionally, the migration change information includes a network card migration flag, a network card IP, a private network management IP of the second host, and a network card type in the verification information;
the gateway cluster updates a locally maintained public network IP routing table and a Nat gateway forwarding table based on the received migration change message, including:
the gateway cluster analyzes the migration change information in the migration change message, and determines whether the network card type in the migration change information is a public network type and whether a network card migration mark is correct;
and if the network card is of a public network type and the network card migration mark is correct, inquiring a first network card of the target cloud instance corresponding to the network card IP in a locally maintained public network IP routing table according to the network card IP in the migration change information, and further updating the private network management IP of the host machine to which the network card in the first network card belongs to into the private network management IP of a second host machine in the migration change information.
Optionally, the migration change information further includes a network card IP type in the verification information;
The gateway cluster updates a locally maintained Nat gateway forwarding table based on the received migration change message, comprising:
the gateway cluster analyzes the migration change information in the migration change message, and determines whether the network card type in the migration change information is a public network type, whether the network card IP type is IPV4 and whether the network card migration mark is correct;
if the network is of a public network type, the network card IP type is IPV4 and the network card migration mark is correct, inquiring a second network card of the target cloud instance corresponding to the network card IP in a Dnat gateway forwarding table in a locally maintained Nat gateway forwarding table and a third network card of the target cloud instance corresponding to the network card IP in a Snat gateway forwarding table in the Nat gateway forwarding table according to the network card IP in the migration change information;
updating the private network management IP of the host to which the network card belongs in the second network card into the private network management IP of the second host in the migration change information, and modifying the Dnat Arp cache;
and updating the private network management IP of the host to which the network card belongs in the third network card to the private network management IP of the second host in the migration change information, and modifying the Snat seven-tuple.
Optionally, the fast transition further information includes a network card IP, a private network management IP of the second host, and a network card type and a network card IP type in the verification information;
the virtual switch updates a locally maintained fast forwarding table based on the received fast transition update message, comprising:
the virtual switch analyzes the fast transition information in the fast transition information and determines whether the network card type in the fast transition information is a public network type and whether the network card IP type is IPV4;
if the network is of a public network type and the network card migration mark is correct, inquiring a quick forwarding table maintained locally according to the network card IP in the quick transition more information, and determining whether the created entry mark corresponding to the network card IP is FALSE or not; if yes, further updating the private network management IP of the host to which the network card belongs in the fast forwarding table into the private network management IP of the second host in the fast transition more information, and updating the last active time.
Optionally, the forwarding the migration change message to the gateway cluster in the present available area and forwarding the fast transition change message to the virtual switches in all hosts in the present available area includes:
The summarizer cluster obtains a multicast address corresponding to the network cluster of the available area, and sends the migration change message to a management multicast address corresponding to the gateway cluster in the available area in a multicast mode;
and obtaining the multicast addresses corresponding to all the hosts in the available area, and sending the fast transition message to the multicast addresses corresponding to all the hosts in the available area in a multicast mode.
Optionally, the first host informs the relevant information of the target cloud instance of a summary cluster of all available areas in the area where the available areas are located, including:
and the first host acquires addresses corresponding to the summarized clusters of all the available areas in the area, and notifies the related information of the target cloud instance to the summarized clusters of all the available areas in the area where the available areas are located in a unicast mode.
Optionally, all available areas in the same area are communicated through a special line;
the first host informs the summarizer clusters of all available areas in the area where the available areas are located of the relevant information of the target cloud instance, and the summarizer clusters comprise:
and the first host informs the summarizer clusters of all the available areas in the area where the available areas are located of the relevant information of the target cloud instance through a private line.
According to a second aspect of embodiments of the present disclosure, a gateway updating device after cloud instance migration is provided, where the gateway updating device is applied to an available area of cloud instance migration, where the available area is composed of a collector cluster, a gateway cluster and a plurality of hosts; each host consists of a virtual switch and a plurality of cloud instances; the host is connected with the gateway cluster through the summarizer cluster, so that cloud instances in the host communicate with the Internet based on the gateway cluster; the device comprises:
the network updating notification module is used for notifying relevant information of a target cloud instance to all the collector clusters of the available areas in the area where the available areas are located when the target cloud instance in a first host in the available areas is completely migrated to a second host in the available areas;
a summarizer cluster notification module, which is used for generating migration change information and fast transition change information based on the received related information of the target cloud instance, forwarding the migration change information to gateway clusters in the available area, and forwarding the fast transition change information to virtual switches in all hosts in the available area;
The gateway cluster network updating module updates a public network IP routing table and a Nat gateway forwarding table which are maintained locally based on the received migration change message by the gateway clusters in each available area;
the virtual switch network update module updates the locally maintained fast forwarding tables based on the received fast transition update messages by the virtual switches within each host in each available zone.
According to a third aspect of embodiments of the present specification, there is provided an electronic device comprising:
a processor;
a memory for storing processor-executable instructions;
the processor is configured to implement the gateway updating method after any cloud instance is migrated.
According to the gateway updating scheme after the cloud instance migration, after the target cloud instance migration is completed, a first host before the migration sends relevant information of the target cloud instance to a collector cluster in an available area, the collector cluster generates migration change information and quick transition change information based on the relevant information of the target cloud instance, and the migration change information is forwarded to the gateway cluster, so that the gateway cluster timely updates a network according to the migration change information; and forwarding the fast transition update message to the virtual switch to enable the virtual switch to update the network in time according to the fast transition update message. Therefore, after the migration of the target cloud instance is completed, the gateway cluster and the virtual switch can update the network in time, so that the network convergence after the cloud instance is migrated can be rapidly realized, and further the cloud instance after the migration can provide services as soon as possible.
Drawings
FIG. 1 is a system architecture diagram of gateway update after cloud instance migration provided by an embodiment of the present disclosure;
FIG. 2 is a flowchart of a gateway update method after cloud instance migration according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a network update portion provided in an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a summary cluster notification section provided by an embodiment of the present disclosure;
fig. 5a is a schematic diagram of a public network IP routing table update in a gateway cluster network update section according to an embodiment of the present disclosure;
fig. 5b is a schematic diagram of a Nat gateway forwarding table update in the gateway trunking network update section provided in an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an update portion of a virtual switch network provided in an embodiment of the present disclosure;
fig. 7 is a hardware configuration diagram of a gateway updating apparatus after cloud instance migration according to an embodiment of the present disclosure;
fig. 8 is a block diagram of a gateway updating apparatus after cloud instance migration according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present description as detailed in the accompanying claims.
The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present description. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
In order to more conveniently understand the technical schemes described in the specification, the technical terms and technical concepts related in the specification are explained by names as follows:
A Region (Region), which may be an area divided from a geographic location and a network delay dimension; common services such as elastic computing, block storage, object storage, VPC network, elastic public network IP, mirror image and the like can be shared in the same region.
The availability zones (Availability Zone, AZ) may refer to separate physical areas of power and network within the same territory.
Yun Shili (Cloud Instance) may refer to a virtual computing environment that may include basic computer components of a CPU, memory, hard disk, system, network, etc. The cloud instance can be a server which is deployed in an available area by a tenant of the cloud computing according to own business needs and provides business services or applications based on the cloud computing in the form of a virtual machine.
The Host (Host) may refer to a container running a virtual machine, such as a KVM (Kernel-based Virtual Machine), xen, hyperV, etc.
A virtual switch may refer to a device that provides ethernet packet forwarding for a virtual machine or other type of virtual device in cloud computing, the virtual switch running on a host.
With the continuous development of cloud computing technology, the requirements on virtualized networks in cloud computing are higher and higher, such as requirements on elasticity (scalability), security (security), reliability (reliablity) and privacy (privacy), and in addition, higher requirements on interconnection performance (performance); a wide variety of network virtualization technologies have emerged.
The virtualization technology promotes the development of cloud instances, so that resources are reasonably utilized. When cloud instance creation, destruction, migration, deactivation and other operations are performed, the virtualized network is required to be converged rapidly, so that service interruption time is reduced, and a user cannot perceive the difference. The wide application of cloud computing promotes continuous optimization of cloud instance migration, and improving the convergence capability of a network after migration also becomes a bottleneck for breaking through. However, cloud instance migration brings flexibility to workload management and also faces some problems; for example, when a cloud instance is migrated from one host to another host, the connection of an original socket (socket) application on the cloud instance, which communicates with the external network, is interrupted, and an application program cannot provide services to the outside; for example, when the external client has service connection with the migration cloud instance and the cloud instance is migrated to other hosts, the client still uses the network before the cloud instance is migrated to find the host, so that service interruption can be caused.
In the related art, after a cloud instance is migrated from one host to another host, a common gateway updating manner is to send a free ARP (Gratuitous ARP), and the migrated cloud instance sends a free ARP broadcast to announce its IP address and MAC address; and after receiving the ARP updating request, the gateway and other equipment form a mapping relation between the host machine physical address where the migrated cloud instance is located and the route to the cloud instance. ARP (Address Resolution Protocol ).
However, since gratuitous ARP protocol is used, any cloud instance can launch gratuitous ARP attacks, thus easily causing gateway or internal network paralysis.
The method and the device aim to provide a safer gateway updating mode after cloud instance migration, and can also quickly realize network convergence after cloud instance migration, so that the cloud instance after migration can provide services as soon as possible. Specifically, after migration of the target cloud instance is completed, the gateway cluster and the virtual switch network in the available area can be updated rapidly, wherein gateway cluster network update mainly comprises update of the Nat gateway forwarding table and the public network IP routing table, and virtual switch network update mainly refers to update of the rapid forwarding table.
Please refer to the system architecture diagram of gateway update after cloud instance migration shown in fig. 1; as shown in fig. 1, the availability zone may be comprised of a summary cluster, a gateway cluster, and a number of hosts.
The summarizer cluster is used as a management node in the available area and can be composed of a main summarizer and a standby summarizer; the summarizer cluster can be used for summarizing management messages in the available area, such as related messages of the cloud instance which completes migration, related messages of the cloud instance on the host, gateway management IP and the like, and after receiving the messages, further processing and notification can be performed.
A Gateway cluster (VG) is a type of software/hardware device for establishing a communication channel over an IP-based network; the available area network can be communicated with the Internet according to forwarding rules on the gateway cluster between a plurality of endpoints located behind the same or different NAT or firewall.
Each host may be composed of a virtual switch and several cloud instances; the host is connected with the gateway cluster through the summarizer cluster, so that cloud instances in the host communicate with the Internet based on the gateway cluster.
The gateway updating process after cloud instance migration related in the present specification may include:
firstly, as shown in fig. 1, migration is performed to a host 2 in the same available area a for a cloud instance 2 in a host 1 in the available area a, after the migration of the cloud instance 2 is completed, because the available areas in the same area are communicated through a dedicated line, the host 1 notifies all available areas in the area of relevant information of the migrated cloud instance 2 (except the available area a in which the host 1 is located, and also includes a summary cluster of available areas B) in fig. 1 as shown by arrow 1 in fig. 1; then, the summarizer cluster receiving the message generates a migration change message and a fast transition more message according to the related information of the notified cloud instance 2, forwards the migration change message to the management multicast address of the gateway cluster of the present available area as shown by an arrow 2 in fig. 1, and forwards the fast transition more message to the virtual switch multicast address of the present available area as shown by an arrow 3 in fig. 1; then, the gateway cluster updates a public network IP routing table and a Nat gateway forwarding table according to the received migration change message; finally, the virtual switch updates the fast forwarding table according to the received fast transition update message.
In this specification, the gateway update scheme after cloud instance migration mainly includes 4 parts, namely a network update part, a summary cluster notification part, a gateway cluster network update part and a virtual switch network update part.
The above 4 parts are further described below in conjunction with the flowchart of the gateway updating method after cloud instance migration shown in fig. 2, and the method can be applied to the available area of cloud instance migration first. As shown in the foregoing fig. 1: the available area is composed of a plurality of hosts, a summarizer and a gateway cluster; each host consists of a virtual switch and a plurality of cloud instances; the host is connected with the gateway cluster through the summarizer, so that cloud instances in the host communicate with the Internet based on the gateway cluster.
Generally, before deploying the availability zone, the following operations are required:
first, an available area ID (Identity document, identity) that needs to be communicated is added to the deployment configuration of the available area, where the available area ID may uniquely identify the corresponding available area, and the available area ID may be in a one-to-one correspondence. The multiple available regions may be connected by special symbols such as an asterisk.
Second, a summary list of available areas is deployed, where the summary list is used to record related information of summary clusters in all available areas in the same region, such as summary cluster IP. The multiple summary lists may also be connected by special symbols such as an asterisk.
Through the operation, the host can acquire the available areas and the collector cluster IP which can be communicated in the area according to the information, so that the information is notified to other available areas through the special line.
With continued reference to fig. 2, the gateway updating method after cloud instance migration may include the following steps:
step 210, when the target cloud instance in the first host in the available area completes migration to the second host in the available area, the first host notifies relevant information of the target cloud instance to all the collector clusters of the available area in the area where the available area is located.
The first host in this specification may refer to a host that migrates a cloud instance, such as host 1 of available area a in fig. 1; accordingly, the second host may refer to a host embedded with the cloud instance, such as host 2 of available region a in fig. 1; the target host may refer to a migrating cloud instance, such as cloud instance 2 in host 1 of availability zone a in fig. 1.
When the cloud instance completes migration, the network updating part is triggered, and the schematic diagram of the network updating part shown in fig. 3 is further combined.
As shown in fig. 3, after the cloud instance is completed, the first host may collect relevant information of the target host, and obtain the aggregate cluster addresses of all the available areas in the same region according to the available area ID and the aggregate list deployed before the available area is deployed; and according to the obtained summarizer cluster address, sending the related information of the target cloud instance to a summarizer cluster of an available area in the same region.
Optionally, after the first host obtains the addresses corresponding to the summarized clusters of all the available areas in the area where the first host is located, the related information of the target cloud instance may be notified to the summarized clusters of all the available areas in the area where the available areas are located in a unicast manner.
The unicast mode is adopted here because the multicast mode can cause other hosts to also receive unnecessary update messages (i.e. messages for notifying relevant information of the target cloud instance), and because the update messages can cross the available area according to the need, other hosts in the available area also receive the migration notification, thus causing unnecessary message transmission in the network.
In addition, the number of gateway clusters is changed according to different demands and services, and the specific number of virtual gateways and the management address of the gateway clusters are only known by the summarizer clusters, so that the first host machine cannot directly inform the gateway, namely, the host machine only interacts with the gateway clusters through service messages and does not interact with the management messages; and the host machine are interacted only by service messages, and no management messages are interacted. Thus improving network security.
In an exemplary embodiment, all available areas in the same area can be communicated through a dedicated line;
accordingly, the notifying, by the first host in step 210, the relevant information of the target cloud instance to the collector clusters of all the available areas in the area where the available areas are located may include:
and the first host informs the summarizer clusters of all the available areas in the area where the available areas are located of the relevant information of the target cloud instance through a private line.
Step 220, the aggregator cluster in each available area generates migration change message and fast transition more message based on the received related information of the target cloud instance, and forwards the migration change message to the gateway cluster in the available area, and forwards the fast transition more message to the virtual switches in all hosts in the available area.
The migration change message is a message notification that the summary cluster notifies the gateway cluster to update the network in the specification; similarly, a fast transition update message is a message notification that the summary cluster notifies the virtual switch of the update network.
In the specification, after the summary cluster receives the related information of the target cloud instance, the summary cluster notification part is triggered.
The related information of the target cloud instance comprises verification information, migration change information and quick transition more information; the verification information comprises a network card type, a network card IP type and a migrated available area of the target cloud instance;
referring to the schematic diagram of the notification portion of the summarizer cluster shown in fig. 4, the generating, by the summarizer cluster in step 220, a migration change message and a fast transition change message based on the received related information of the target cloud instance may include:
the summarizer cluster determines whether the network card type of the target cloud instance is a public network type; if the network type is not public network type, ending the processing;
if the network card type of the target cloud instance is a public network type, further determining whether the migrated available area and the available area where the summarizer cluster is located are the same available area;
If the migration change information is the same available area, generating a migration change message based on the migration change information;
if the network card IP type is not the same available area, further determining whether the network card IP type is IPV4; if not IPV4, ending the process;
and if the message is IPV4, generating a fast transition message based on the fast transition message.
In this specification, unlike the first host described above, the aggregator cluster may use a multicast manner to forward the migration change message to the gateway clusters in the available area and forward the fast transition update message to the virtual switches within all hosts in the available area after generating the migration change message and the fast transition update message.
Referring to fig. 4 as well, the summarizer cluster obtains the multicast address corresponding to the network cluster in the available area, and sends the migration change message to the management multicast address corresponding to the gateway cluster in the available area in a multicast mode;
and obtaining the multicast addresses corresponding to all the hosts in the available area, and sending the fast transition message to the multicast addresses corresponding to all the hosts in the available area in a multicast mode.
The reason why the aggregator cluster sends the message and uses multicasting in this specification is: the summarizer cluster and the gateway cluster are in the same management network, and the transmission of multicast to the gateway cluster by the summarizer cluster does not affect other available areas and hosts. The summarizer cluster and the host are also in the same management network, and the transmission of multicast to the host by the summarizer cluster does not affect other available areas and gateway clusters.
Step 230, the gateway cluster in each available area updates the locally maintained public network IP routing table and the Nat gateway forwarding table based on the received migration change message;
in the present specification, after receiving the migration change message, the gateway cluster triggers the gateway cluster network update part.
The gateway cluster network update is further divided into 2 sub-parts, namely a public network IP routing table update and a Nat gateway forwarding table update.
Updating the public network IP routing table, wherein the migration change information comprises a network card migration mark, a network card IP, a private network management IP of a second host machine and a network card type in the verification information;
further in combination with the schematic diagram of the update of the public network IP routing table in the gateway cluster network update section shown in fig. 5a, the updating of the locally maintained public network IP routing table by the gateway cluster in step 230 based on the received migration change message may include:
the gateway cluster analyzes the migration change information in the migration change message, and determines whether the network card type in the migration change information is a public network type and whether a network card migration mark is correct;
if the network card is of a public network type and the network card migration mark is correct, changing a locally maintained public network IP routing table;
If the network card migration flag is not the public network type or is incorrect, ending the processing.
In this specification, the public network IP routing table is one of gateway cluster forwarding tables, and is used for communication with the internet.
In an exemplary embodiment, the altering the locally maintained public network IP routing table may specifically include:
and the gateway cluster inquires a first network card of the target cloud instance corresponding to the network card IP in a locally maintained public network IP routing table according to the network card IP in the migration change information, and further updates the private network management IP of the host to which the network card in the first network card belongs to the private network management IP of a second host in the migration change information.
For updating the Nat gateway forwarding table, the migration change information includes a network card migration flag, a network card IP, a private network management IP of the second host, and a network card type, and further includes a network card IP type in the verification information;
further in combination with the schematic diagram of the Nat gateway forwarding table update in the gateway cluster network update section shown in fig. 5b, the updating, by the gateway cluster in step 230, of the locally maintained Nat gateway forwarding table based on the received migration change message may include:
The gateway cluster analyzes the migration change information in the migration change message, and determines whether the network card type in the migration change information is a public network type, whether the network card IP type is IPV4 and whether the network card migration mark is correct;
if the network card is of a public network type, the network card IP type is IPV4 and the network card migration mark is correct, changing the Arp learning result of the Dnat and changing the Snat seven-tuple;
if the network card is not of the public network type or the network card IP type is not IPV4 or the network card migration flag is incorrect, ending the processing.
In this specification, the Nat gateway forwarding table includes a Snat gateway forwarding table and a Dnat gateway forwarding table, which are one of gateway cluster forwarding tables, and are used for communication with the internet.
Nat (Network Address Translation) is a process of converting an IP address in an IP packet header into another IP address, and is classified into Snat and Dnat.
Snat (Source Network Address Translation) when the internal address is to access a service on the public network (e.g. wdb access), the internal address will actively initiate a connection, and the gateway will perform address conversion on the internal address, so as to convert the private IP of the internal address into the public IP of the public network, which is mainly used for accessing the internal shared IP to the outside.
Dnat (Dest inat ion Network Address Translation) when external service (such as web site for external release) needs to be provided inside, the external address actively initiates connection, the gateway receives the connection, then the connection is converted into inside, that is, the gateway with public network IP replaces the internal service to accept external connection, then address conversion is performed inside, and the method is mainly used for external release of internal service.
In an exemplary embodiment, the changing the Arp learning result of the Dnat and the changing the Snat seven-tuple may specifically include:
according to the network card IP in the migration change information, the gateway cluster inquires a second network card of the target cloud instance corresponding to the network card IP in a Dnat gateway forwarding table in a locally maintained Nat gateway forwarding table and a third network card of the target cloud instance corresponding to the network card IP in a Snat gateway forwarding table in the Nat gateway forwarding table;
updating the private network management IP of the host to which the network card belongs in the second network card into the private network management IP of the second host in the migration change information, and modifying the Dnat Arp cache;
and updating the private network management IP of the host to which the network card belongs in the third network card to the private network management IP of the second host in the migration change information, and modifying the Snat seven-tuple.
The virtual switch within each host in each available zone updates the locally maintained fast forwarding table based on the received fast transition update message, step 240.
In this specification, after receiving the fast transition update message, the virtual switch will trigger the virtual switch network update part.
The fast transition information comprises a network card IP, a private network management IP of a second host, and a network card type and a network card IP type in the verification information;
further in conjunction with the schematic diagram of the update portion of the virtual switch network shown in fig. 6, the updating, by the virtual switch in step 240, the fast forwarding table maintained locally based on the received fast transition update message may include:
the virtual switch analyzes the fast transition information in the fast transition information and determines whether the network card type in the fast transition information is a public network type and whether the network card IP type is IPV4;
if the network card is not of the public network type or the network card migration mark is incorrect, ending the processing;
if the network is of a public network type and the network card migration mark is correct, inquiring a quick forwarding table maintained locally according to the network card IP in the quick transition more information, and determining whether the created entry mark corresponding to the network card IP is FALSE or not;
If not FALSE, ending the process; if FALSE, the fast forwarding table is updated.
In the present specification, the fast forwarding table is a traffic redirection of a public network IP communication between regions, and when network cards having the public network IP in the same region communicate with each other, the public network communication needs to pass through a gateway, and the gateway forwards the traffic. The quick forwarding table is used, and after the quick forwarding table is queried, the flow can be directly forwarded to the destination host belonging to the same region, so that a gateway forwarding link is omitted.
In an exemplary embodiment, the updating the fast forwarding table may specifically include:
and the virtual switch updates the private network management IP of the host to which the network card belongs in the fast forwarding table into the private network management IP of the second host in the fast transition more information, and updates the last active time.
In addition, when no network card is in the same network with the network card of the migration cloud instance in the quick forwarding table, or the network card of the migration cloud instance is a private network card, the quick forwarding table does not have a quick forwarding entry of the network card. When the network card is of the public network type and the network card IP is IPV4 and has no fast forwarding entry, the creation mark is required to be checked, the fast creation entry can be inserted if the network card is TRUE, the table entry is not required to be created if the network card is FALSE, namely, even if the cloud instance and the migration cloud instance are in the same network, no communication or no cache with low communication frequency is possible, the creation is not required at the moment, and the cache is simplified.
In summary, the present disclosure provides a gateway updating scheme after migration of a cloud instance, when migration of a target cloud instance is completed, a first host before migration sends relevant information of the target cloud instance to a collector cluster in an available area, the collector cluster generates migration change information and fast transition change information based on the relevant information of the target cloud instance, and forwards the migration change information to a gateway cluster, so that the gateway cluster updates a network in time according to the migration change information; and forwarding the fast transition update message to the virtual switch to enable the virtual switch to update the network in time according to the fast transition update message.
On the one hand, after the migration of the target cloud instance is completed, the gateway IP routing table and the gateway Nat forwarding table after the migration of the cloud instance are updated rapidly, so that the network convergence after the migration of the cloud instance can be realized rapidly, and further the cloud instance after the migration can provide services as soon as possible.
On the other hand, as the cloud instance after migration can still directly check the fast forwarding table with the cloud instance with the public network IP network card in the region, the fast forwarding table is not required to be forwarded and updated through gateway processing, and the working pressure of the gateway is relieved.
On the other hand, the free Arp is not used in the scheme provided by the specification, so that the safety risk caused by free Arp attack is avoided, and the system is safer.
Corresponding to the embodiment of the gateway updating method after cloud instance migration, the present disclosure further provides an embodiment of the gateway updating device after cloud instance migration. The embodiment of the device can be implemented by software, or can be implemented by hardware or a combination of hardware and software. Taking a software implementation as an example, the device in a logic sense is formed by reading a corresponding computer program in a nonvolatile memory into a memory by a processor of a device where the device is located. In terms of hardware, as shown in fig. 7, a hardware structure diagram of a device where a gateway updating apparatus after cloud instance migration in the present disclosure is located is shown in fig. 7, and in addition to a processor, a network interface, a memory, and a nonvolatile memory shown in fig. 7, the device where the apparatus is located in the embodiment may generally include other hardware according to actual communication functions, which is not described herein again.
Referring to fig. 8, a block diagram of a gateway updating device after cloud instance migration provided in an embodiment of the present disclosure corresponds to the embodiment shown in fig. 2, and is applied to an available area for cloud instance migration, where the available area is formed by a plurality of hosts, a summary collector cluster and a gateway cluster; each host consists of a virtual switch and a plurality of cloud instances; the host is connected with the gateway cluster through the summarizer cluster, so that cloud instances in the host communicate with the Internet based on the gateway cluster; the device comprises:
A network update notification module 810, configured to notify, when a target cloud instance in a first host in the available area completes migration to a second host in the available area, relevant information of the target cloud instance to a summary cluster of all available areas in an area where the available area is located;
a summary cluster notification module 820 that generates a migration change message and a fast transition update message based on the received related information of the target cloud instance, and forwards the migration change message to gateway clusters in the available zone, and forwards the fast transition update message to virtual switches within all hosts in the available zone;
a gateway cluster network update module 830 that updates a locally maintained public network IP routing table and a Nat gateway forwarding table based on the received migration change message for the gateway clusters in each available zone;
the virtual switch network update module 840, the virtual switch within each host in each available zone, updates the fast forwarding table maintained locally based on the received fast transition update message.
Optionally, the related information of the target cloud instance includes verification information, migration change information and fast transition more information; the verification information comprises a network card type, a network card IP type and a migrated available area of the target cloud instance;
The summarizer cluster notification module 820 is further configured to determine whether the network card type of the target cloud instance is a public network type; if the network card type of the target cloud instance is a public network type, further determining whether the migrated available area and the available area where the collector cluster is located are the same available area, and if the available area is the same available area, generating migration change information based on the migration change information; if not, further determining whether the network card IP type is IPV4, and if so, generating a fast transition more message based on the fast transition more information.
Optionally, the migration change information includes a network card migration flag, a network card IP, a private network management IP of the second host, and a network card type in the verification information;
the gateway cluster network updating module 830 is further configured to parse the migration change information in the migration change message by using the gateway cluster, determine whether the network card type in the migration change information is a public network type, and determine whether a network card migration flag is correct; and if the network card is of a public network type and the network card migration mark is correct, inquiring a first network card of the target cloud instance corresponding to the network card IP in a locally maintained public network IP routing table according to the network card IP in the migration change information, and further updating the private network management IP of the host machine to which the network card in the first network card belongs to into the private network management IP of a second host machine in the migration change information.
Optionally, the migration change information further includes a network card IP type in the verification information;
the gateway cluster network updating module 830 is further configured to parse the migration change information in the migration change message, and determine whether the network card type in the migration change information is a public network type, whether the network card IP type is an IPV4, and whether a network card migration flag is correct; if the network is of a public network type, the network card IP type is IPV4 and the network card migration mark is correct, inquiring a second network card of the target cloud instance corresponding to the network card IP in a Dnat gateway forwarding table in a locally maintained Nat gateway forwarding table and a third network card of the target cloud instance corresponding to the network card IP in a Snat gateway forwarding table in the Nat gateway forwarding table according to the network card IP in the migration change information; updating the private network management IP of the host to which the network card belongs in the second network card into the private network management IP of the second host in the migration change information, and modifying the Dnat Arp cache; and updating the private network management IP of the host to which the network card belongs in the third network card to the private network management IP of the second host in the migration change information, and modifying the Snat seven-tuple.
Optionally, the fast transition further information includes a network card IP, a private network management IP of the second host, and a network card type and a network card IP type in the verification information;
the virtual switch network update module 840 is further configured to parse the fast transition information in the fast transition information, and determine whether the network card type in the fast transition information is a public network type and whether the network card IP type is IPV4; if the network is of a public network type and the network card migration mark is correct, inquiring a quick forwarding table maintained locally according to the network card IP in the quick transition more information, and determining whether the created entry mark corresponding to the network card IP is FALSE or not; if yes, further updating the private network management IP of the host to which the network card belongs in the fast forwarding table into the private network management IP of the second host in the fast transition more information, and updating the last active time.
Optionally, the summarizer cluster notification module 820 is further configured to obtain a multicast address corresponding to a network cluster in the available area, and send the migration change message to a management multicast address corresponding to a gateway cluster in the available area in a multicast manner; and obtaining the multicast addresses corresponding to all the hosts in the available area, and sending the fast transition message to the multicast addresses corresponding to all the hosts in the available area in a multicast mode.
Optionally, the network update notification module 810 is further configured to obtain addresses corresponding to the summarized clusters of all the available areas in the area where the first host is located, and notify, in a unicast manner, the summarized clusters of all the available areas in the area where the available areas are located of related information of the target cloud instance.
Optionally, all available areas in the same area are communicated through a special line;
the network update notification module 810 is further configured to notify, by the first host, the relevant information of the target cloud instance to a collector cluster of all available areas in the area where the available areas are located through a private line.
The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer, which may be in the form of a personal computer, laptop computer, cellular telephone, camera phone, smart phone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or a combination of any of these devices.
The implementation process of the functions and roles of each unit in the above device is specifically shown in the implementation process of the corresponding steps in the above method, and will not be described herein again.
For the device embodiments, reference is made to the description of the method embodiments for the relevant points, since they essentially correspond to the method embodiments. The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purposes of the present description. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Fig. 8 above describes an internal functional module and a structural schematic of a gateway updating apparatus after cloud instance migration, and the substantial execution subject thereof may be an electronic device, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to execute an embodiment of the gateway updating method after any cloud instance migration described above.
In the above embodiment of the electronic device, it should be understood that the processor may be a central processing unit (english: central Processing Unit, abbreviated as CPU), or may be other general purpose processors, digital signal processors (english: digital Signal Processor, abbreviated as DSP), application specific integrated circuits (english: application Specific Integrated Circuit, abbreviated as ASIC), or the like. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc., and the aforementioned memory may be a read-only memory (ROM), a random access memory (random access memory, RAM), a flash memory, a hard disk, or a solid state disk. The steps of a method disclosed in connection with the embodiments of the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the electronic device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments in part.
Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the specification following, in general, the principles of the specification and including such departures from the present disclosure as come within known or customary practice within the art to which the specification pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the specification being indicated by the following claims.
It is to be understood that the present description is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.
Claims (9)
1. The gateway updating method after cloud instance migration is characterized by being applied to an available area for cloud instance migration, wherein the available area is composed of a plurality of hosts, a summary device cluster and a gateway cluster; each host consists of a virtual switch and a plurality of cloud instances; the host is connected with the gateway cluster through the summarizer cluster, so that cloud instances in the host communicate with the Internet based on the gateway cluster; the method comprises the following steps:
When a target cloud instance in a first host in the available region is migrated to a second host in the available region, the first host informs a summary cluster of all available regions in the region where the available region is located of relevant information of the target cloud instance; wherein the related information includes verification information, migration change information and fast transition more information; the verification information comprises a network card type, a network card IP type and a migrated available area of the target cloud instance;
the summarizer clusters in each available area determine whether the network card type of the target cloud instance is a public network type; if the network card type of the target cloud instance is a public network type, further determining whether the migrated available area and the available area where the collector cluster is located are the same available area, if so, generating migration change information based on the migration change information, and forwarding the migration change information to a gateway cluster in the available area; if the network card IP type is not the same available area, further determining whether the network card IP type is IPV4, if so, generating a fast transition message based on the fast transition message, and forwarding the fast transition message to virtual switches in all hosts in the available area;
The gateway cluster in each available area updates a locally maintained public network IP routing table and a Nat gateway forwarding table based on the received migration change message;
the virtual switch within each host in each available zone updates the locally maintained fast forwarding table based on the received fast transition update message.
2. The method of claim 1, wherein the migration change information includes a network card migration flag, a network card IP, a private network management IP of the second host, and a network card type in the authentication information;
the gateway cluster updates a locally maintained public network IP routing table based on the received migration change message, including:
the gateway cluster analyzes the migration change information in the migration change message, and determines whether the network card type in the migration change information is a public network type and whether a network card migration mark is correct;
and if the network card is of a public network type and the network card migration mark is correct, inquiring a first network card of the target cloud instance corresponding to the network card IP in a locally maintained public network IP routing table according to the network card IP in the migration change information, and further updating the private network management IP of the host machine to which the network card in the first network card belongs to into the private network management IP of a second host machine in the migration change information.
3. The method of claim 2, wherein the migration change information further includes a network card IP type in the authentication information;
the gateway cluster updates a locally maintained Nat gateway forwarding table based on the received migration change message, comprising:
the gateway cluster analyzes the migration change information in the migration change message, and determines whether the network card type in the migration change information is a public network type, whether the network card IP type is IPV4 and whether the network card migration mark is correct;
if the network is of a public network type, the network card IP type is IPV4 and the network card migration mark is correct, inquiring a second network card of the target cloud instance corresponding to the network card IP in a Dnat gateway forwarding table in a locally maintained Nat gateway forwarding table and a third network card of the target cloud instance corresponding to the network card IP in a Snat gateway forwarding table in the Nat gateway forwarding table according to the network card IP in the migration change information;
updating the private network management IP of the host to which the network card belongs in the second network card into the private network management IP of the second host in the migration change information, and modifying the Dnat Arp cache;
and updating the private network management IP of the host to which the network card belongs in the third network card to the private network management IP of the second host in the migration change information, and modifying the Snat seven-tuple.
4. The method of claim 1, wherein the fast transition further information includes a network card IP, a private network management IP of the second host, and a network card type, a network card IP type in the authentication information;
the virtual switch updates a locally maintained fast forwarding table based on the received fast transition update message, comprising:
the virtual switch analyzes the fast transition information in the fast transition information and determines whether the network card type in the fast transition information is a public network type and whether the network card IP type is IPV4;
if the network is of a public network type and the network card migration mark is correct, inquiring a quick forwarding table maintained locally according to the network card IP in the quick transition more information, and determining whether the created entry mark corresponding to the network card IP is FALSE or not; if yes, further updating the private network management IP of the host to which the network card belongs in the fast forwarding table into the private network management IP of the second host in the fast transition more information, and updating the last active time.
5. The method of claim 1, wherein forwarding the migration change message to the gateway cluster in the present availability zone and forwarding the fast transition change message to the virtual switches within all hosts in the present availability zone comprises:
The summarizer cluster obtains a multicast address corresponding to the network cluster of the available area, and sends the migration change message to a management multicast address corresponding to the gateway cluster in the available area in a multicast mode;
and obtaining the multicast addresses corresponding to all the hosts in the available area, and sending the fast transition message to the multicast addresses corresponding to all the hosts in the available area in a multicast mode.
6. The method of claim 1, wherein the first host notifying all the collector clusters of the available region in the area where the available region is located of the relevant information of the target cloud instance, comprises:
and the first host acquires addresses corresponding to the summarized clusters of all the available areas in the area, and notifies the related information of the target cloud instance to the summarized clusters of all the available areas in the area where the available areas are located in a unicast mode.
7. The method of claim 1, wherein all available areas within the same area are interworked by dedicated lines;
the first host informs the summarizer clusters of all available areas in the area where the available areas are located of the relevant information of the target cloud instance, and the summarizer clusters comprise:
And the first host informs the summarizer clusters of all the available areas in the area where the available areas are located of the relevant information of the target cloud instance through a private line.
8. The gateway updating device after cloud instance migration is characterized by being applied to an available area for cloud instance migration, wherein the available area is composed of a summarizer cluster, a gateway cluster and a plurality of hosts; each host consists of a virtual switch and a plurality of cloud instances; the host is connected with the gateway cluster through the summarizer cluster, so that cloud instances in the host communicate with the Internet based on the gateway cluster; the device comprises:
the network updating notification module is used for notifying relevant information of a target cloud instance to all the collector clusters of the available areas in the area where the available areas are located when the target cloud instance in a first host in the available areas is completely migrated to a second host in the available areas; wherein the related information includes verification information, migration change information and fast transition more information; the verification information comprises a network card type, a network card IP type and a migrated available area of the target cloud instance;
The summarizer cluster notification module is used for determining whether the network card type of the target cloud instance is a public network type or not according to the summarizer clusters in each available area; if the network card type of the target cloud instance is a public network type, further determining whether the migrated available area and the available area where the collector cluster is located are the same available area, if so, generating migration change information based on the migration change information, and forwarding the migration change information to a gateway cluster in the available area; if the network card IP type is not the same available area, further determining whether the network card IP type is IPV4, if so, generating a fast transition message based on the fast transition message, and forwarding the fast transition message to virtual switches in all hosts in the available area;
the gateway cluster network updating module updates a public network IP routing table and a Nat gateway forwarding table which are maintained locally based on the received migration change message by the gateway clusters in each available area;
the virtual switch network update module updates the locally maintained fast forwarding tables based on the received fast transition update messages by the virtual switches within each host in each available zone.
9. An electronic device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the method of any of the preceding claims 1-7.
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