MAINTENANCE OF OFFLINE VIRTUAL MACHINES BASED ON MAINTENANCE REGISTER

摘要

A solution is proposed for maintaining virtual machines being available in a data-processing system. A corresponding method (A1-A14) comprises the steps of determining (A2) a list of software components installed on each virtual machine, retrieving (A3) a set of maintenance policies for each software component, each maintenance policy being indicative of a patch to be applied to the corresponding software component, determining (A4-A6) a set of old virtual machines having at least one old software component thereof requiring the application of at least a new one of the corresponding patches according to a comparison among the maintenance policies and a maintenance register indicative of a current state of the software components of the virtual machines, applying (A7-A13) the corresponding at least one new patch to each old software component of each old virtual machine, and updating (A14) the maintenance register according to the application of said at least one new patch to each old software component of each old virtual machine.