Preserving changes to a configuration of a running virtual machine

摘要

A method is provided for preserving changes to a configuration of a running virtual machine. The method includes reading an initial configuration, starting the virtual machine under application of the initial configuration, modifying the configuration of the virtual machine during runtime, storing the modified configuration of the virtual machine during shutdown, and reading the modified configuration at re-start of the virtual machine and re-starting the virtual machine under application of the modified configuration.

主权项

1. A method for preserving changes to a configuration of a running virtual machine, the method comprising:
reading an initial configuration; starting a virtual machine under application of the initial configuration, modifying the initial configuration of the virtual machine during runtime to create a modified configuration, by applying a configuration change to the virtual machine during runtime, wherein the configuration change is initiated by the virtual machine during runtime and the modified configuration is retained in a storage space; modifying a persistent runtime configuration setting at a time during runtime by one of: enabling the persistent runtime configuration setting or disabling the persistent runtime configuration setting; checking whether the persistent runtime configuration setting is enabled and whether the modified configuration is available from the storage space; responsive to the checking determining that the persistent runtime configuration setting is enabled and determining that the modified configuration is available from the storage space, storing, in place of the initial configuration, the modified configuration of the virtual machine, during shutdown, wherein the modified configuration is different than the initial configuration, reading the modified configuration at re-start of the virtual machine, and re-starting the virtual machine under application of the modified configuration; responsive to the checking determining that the persistent runtime configuration setting is enabled and determining that the modified configuration is not available from the storage space, reading the initial configuration at re-start of the virtual machine and re-starting the virtual machine under application of the initial configuration; and responsive to the checking determining that the persistent runtime configuration setting is disabled, reading the initial configuration at re-start of the virtual machine and re-starting the virtual machine under application of the initial configuration.