Computer system and infrastructure operation history management method

An infrastructure operation history management method executed by a computer system that is connected to an infrastructure, a version management system, and an infrastructure management system, the infrastructure providing resources for implementing a service, the version management system managing a version of a manifest file describing settings for building the service, the infrastructure management system generating a command for the infrastructure according to the manifest file and outputting the generated command to the infrastructure, the infrastructure operation history management method comprising:

• a first step of causing the computer system to receive a notification including a change identification corresponding to the version of the manifest file from the version management system due to the update of the manifest file;
• and
• a second step of causing the computer system to transmit an execution instruction including the change identification for performing a change operation to the infrastructure management system so as to store an operation history of the change operation that is associated with the command and the change identification.