Fault injection configuration equivalency testing

A computer program product (CPP), the CPP comprising:

• a set of one or more computer-readable storage media;
• and
• program instructions, collectively stored in the set of one or more storage media, for causing a processor set to perform the following computer operations:
• cause a first fault injection configuration to be injected into a first node of a first edge site of a cloud environment, wherein the first edge site includes a plurality of nodes including the first node, wherein the cloud environment includes a second edge site;
• compute a first minimum cost maximum computational flow value for the first fault injection configuration;
• cause a second fault injection configuration to be injected into a second node of the second edge site for causing a second fault injection;
• compute a second minimum cost maximum computational flow value for the second fault injection configuration;
• in response to a determination that a difference of the first minimum cost maximum computational flow value and the second minimum cost maximum computational flow value is less than a predetermined threshold:
• determining that the first fault injection configuration and the second fault injection configuration are equivalent,
• retain the first fault injection configuration for a fault injection testing process, and
• discard the second fault injection configuration;
• and
• perform the fault injection testing process, wherein the performing the fault injection testing process includes:
• causing further fault injections within the first edge site and the second edge site,
• examining and testing recovery and workaround procedures for the further fault injections, and
• using the recovery and workaround procedures during operation of the cloud environment.

A computer system (CS), the CS comprising:

• a processor set;
• a set of one or more computer-readable storage media;
• program instructions, collectively stored in the set of one or more storage media, for causing the processor set to perform the following computer operations:
• cause a first fault injection configuration to be injected into a first node of a first edge site of a cloud environment, wherein the first edge site includes a plurality of nodes including the first node, wherein the cloud environment includes a second edge site;
• compute a first minimum cost maximum computational flow value for the first fault injection configuration;
• cause a second fault injection configuration to be injected into a second node of the second edge site for causing a second fault injection;
• compute a second minimum cost maximum computational flow value for the second fault injection configuration;
• in response to a determination that a difference of the first minimum cost maximum computational flow value and the second minimum cost maximum computational flow value is less than a predetermined threshold;
• determining that the first fault injection configuration and the second fault injection configuration are equivalent,
• retain the first fault injection configuration for a fault injection testing process, and
• discard the second fault injection configuration;
• and
• perform the fault injection testing process, wherein the performing the fault injection testing process includes:
• causing further fault injections within the first edge site and the second edge site,
• examining and testing recovery and workaround procedures for the further fault injections, and
• using the recovery and workaround procedures during operation of the cloud environment.