Google Cloud launched Fault Injection Testing in preview for Cloud SQL failovers and Layer 7 traffic-degradation experiments.

Google Cloud introduced Fault Injection Testing in public preview to automate resilience testing for distributed cloud applications. Users create experiment templates that define the fault, targeted resources and duration.

The preview supports two primary scenarios. It can trigger failover of a highly available Cloud SQL database instance from its primary zone to a standby zone, or selectively add latency and Hypertext Transfer Protocol error codes through a Layer 7 load balancer.

Before injecting a fault, the service conducts an automated, read-only dry run. This checks permissions and supplies a current list of affected resources, after which the user must manually start the experiment.

Faults are reverted when the template’s timer expires, and users can immediately halt an experiment and begin restoration through a stop-and-revert function. Google recommended using the preview in non-production environments while customers evaluate the service and provide feedback.