Method and equipment for upgrading client operating system of active virtual machine

Abstract

The invention discloses a method and equipment for upgrading the client operating system of an active virtual machine. The method comprises the following steps of: copying the active virtual machine to generate a backup virtual machine which uses a virtual disk image file of the active virtual machine, which is set to be read only, as the virtual disk image file of the backup virtual machine; upgrading the client operating system of the backup virtual machine; merging the change performed to the virtual disk image file during the process of the operating of the active virtual machine and the change performed to the virtual disk image file during the process of the upgrading of the active virtual machine into the virtual disk image file; suspending the backup virtual machine; migrating theactive process of a Java application program operated in the active virtual machine into the backup virtual machine to generate a backup process; migrating the resources occupied by the active process of the Java application program into the backup virtual machine to ensure that the backup process occupies identical resources; and recovering the operation of the backup virtual machine.

Description

technical field [0001] The invention relates to a method and device for upgrading a guest operating system of an active virtual machine. Background technique [0002] In the current commercial field, availability (availability) has become a key factor in evaluating system performance. Availability refers to the degree to which the system, subsystem, or device providing the service is able to work when a task is invoked at an unknown or random moment and is in a committable state when the task begins. Simply put, availability can be expressed as the proportion of time a system is in a working state. For many services, from high-end banking services to low-end web services, 24×7 availability is an important requirement. In the past decades, in order to obtain a high availability (HA) system, many technologies have been developed in many aspects such as hardware-level HA equipment, software-level middleware, clusters, and HA-oriented application programming principles. [00...

AI Technical Summary

Problems solved by technology

[0004] However, a problem that needs to be solved in the traditional business service system using virtual machines is: how to update the platform supporting the service (for example, the operating system of the virtual machine where the service is located, i.e., the customer operating system) while maintaining the availability of the provided service. system)

Traditionally, after a patch for upgrading the guest operating system (OS) is installed in the guest operating system (OS) of a running virtual machine (i.e., an active virtual machine), it is often necessary to restart the virtual machine, which will result in Services provided through the virtual machine will become unavailable during start-up, resulting in a commercial loss to the customer

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