Virtual Machine Fault Tolerance Method, Apparatus, and System

A primary-end host, wherein the primary-end host is applied to a virtual machine fault tolerance system, wherein the virtual machine fault tolerance system further comprises a secondary-end host, a primary virtual machine runs on the primary-end host, and a secondary virtual machine runs on the secondary-end host, wherein the primary-end host comprises a virtual machine fault tolerance apparatus, and wherein the virtual machine fault tolerance apparatus comprises:

• a receiver configured to receive a network request from a client;
• a transmitter configured to separately send the network request received by the receiver to the primary virtual machine and the secondary virtual machine such that the primary virtual machine and the secondary virtual machine separately respond to the network request, and generate primary-end data and secondary-end data corresponding to the network request,
• wherein the receiver is further configured to receive a network response data packet, wherein the network response data packet is a primary-end data packet transmitted by the primary virtual machine or a secondary-end data packet transmitted by the secondary virtual machine, wherein the primary-end data packet comprises a part or all of the primary-end data, and wherein the secondary-end data packet comprises a part or all of the secondary-end data;
• a processor coupled to the receiver and the transmitter and configured to:
• compare data of the network response data packet with peer-end data of the network response data packet according to data byte order when the peer-end data is stored, wherein the peer-end data is the secondary-end data when the network response data packet is the primary-end data packet, and wherein the peer-end data is the primary-end data when the network response data packet is the secondary-end data packet;
• and
• generate a new data packet when the compared data is the same, wherein the new data packet comprises the compared data, and
• wherein the transmitter is further configured to send the new data packet generated by the processor to the client.

A virtual machine fault tolerance system, comprising:

• a primary-end host;
• and
• a secondary-end host,
• wherein a primary virtual machine runs on the primary-end host,
• wherein a secondary virtual machine runs on the secondary-end host,
• wherein the primary-end host comprises a virtual machine fault tolerance apparatus, and
• wherein the virtual machine fault tolerance apparatus comprises:
• a receiver configured to receive a network request from a client;
• a transmitter configured to separately send the network request received by the receiver to the primary virtual machine and the secondary virtual machine such that the primary virtual machine and the secondary virtual machine separately respond to the network request, and generate primary-end data and secondary-end data corresponding to the network request,
• wherein the receiver is further configured to receive a network response data packet, wherein the network response data packet is a primary-end data packet transmitted by the primary virtual machine or a secondary-end data packet transmitted by the secondary virtual machine, wherein the primary-end data packet comprises a part or all of the primary-end data, and wherein the secondary-end data packet comprises a part or all of the secondary-end data;
• a processor coupled to the receiver and the transmitter and configured to:
• compare data of the network response data packet with peer-end data of the network response data packet according to data byte order when the peer-end data is stored, wherein the peer-end data is the secondary-end data when the network response data packet is the primary-end data packet, and wherein the peer-end data is the primary-end data when the network response data packet is the secondary-end data packet;
• and
• generate a new data packet when the compared data is the same, wherein the new data packet comprises the compared data, and
• wherein the transmitter is further configured to send the new data packet generated by the processor to the client.

A computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out a virtual machine fault tolerance method comprising:

• receiving a network request from a client;
• separately sending the network request to a primary virtual machine and a secondary virtual machine such that the primary virtual machine and the secondary virtual machine separately respond to the network request, and generate primary-end data and secondary-end data corresponding to the network request;
• receiving a network response data packet, wherein the network response data packet is a primary-end data packet transmitted by the primary virtual machine or a secondary-end data packet transmitted by the secondary virtual machine, wherein the primary-end data packet comprises a part or all of the primary-end data, and wherein the secondary-end data packet comprises a part or all of the secondary-end data;
• comparing data of the received network response data packet with peer-end data of the network response data packet according to data byte order when the peer-end data is stored, wherein the peer-end data is the secondary-end data when the network response data packet is the primary-end data packet, and wherein the peer-end data is the primary-end data when the network response data packet is the secondary-end data packet;
• and
• generating and sending a new data packet to the client when the compared data is the same, wherein the new data packet comprises the compared data.