The testing process involves multiple modules that perform different tasks. The modules and their APIs are listed below.

Governs the whole testing process. Runs different workloads during different troubles.

Puts workloads against the database. Writes logs that are later used by valideaux.

• start(id, workload, cluster) - starts a workload against the cluster and call it id.
• stop(id) - stops a previously started workload called id.

Manages the database nodes.

• deploy(driver, ...) - deploys a cluster using the specified driver and other parameters specific to that driver. Returns a cluster instance that is used in other methods.
• cluster->up(id) - adds a node named id to the cluster.
• cluster->down(id) - removes a node named id from the cluster.
• cluster->drop(src, dst, ratio) - drop ratio packets flowing from node src to node dst.
• cluster->delay(src, dst, msec) - delay packets flowing from node src to node dst by msec milliseconds.

This is the troublemaker that messes with the network, nodes and time.

• cause(cluster, trouble, ...) - causes the specified trouble in the specified cluster with some trouble-specific parameters.
• fix(cluster) - fixes all troubles caused in the cluster.

Validates the logs of stresseaux.

Generates reports on the test results. This is usually a table that with trouble vs workload axes.