Methods, devices, and systems for virtual machines to access physical servers in cloud computing systems

摘要

A method for a virtual machine to access a physical server in a cloud computing system, an apparatus, and a system are disclosed. A service is deployed on the physical server. A cloud platform allocates, to the service, a publishing IP address and a publishing port that correspond to the service, externally publishes the service, and configures a NAT rule on an access network element of the virtual machine. The NAT rule includes a correspondence between the publishing IP address and the publishing port and an IP address and a port that are of the physical server running the service. When receiving a service access request for accessing the service by the virtual machine, the access network element modifies, according to the NAT rule, a destination address of the service access request into the IP address and the port that are of the physical server, and routes the modified service access request to the physical server, so that the virtual machine can access the service on the physical server without knowing a real IP address and port of the physical server.