METHOD FOR GENERATING UPGRADE CAMPAIGNS TO UPGRADE VIRTUALIZATION FACILITIES

摘要

An upgrade campaign is generated for runtime execution on a highly available system. The highly available system includes virtual machines (VMs) that are enabled for migration between virtual machine monitors (VMMs). VM migration is disabled for the VMs to be added, modified and removed in the upgrade campaign. A first set, a second set and a third set of sub-trees are identified from tree views of the source configuration and the target configuration. Each sub-tree contains entities representing a subset of the VMs and the VMMs. Each sub-tree of the first set includes entities tagged for addition only, each sub-tree of the second set includes entities tagged for modification, and each sub-tree of the third set includes entities tagged for removal only. An upgrade procedure is generated for each sub-tree, with an indication of the order of execution. Then VM migration is reenabled according to the target configuration.