  In microservice applications, ensuring resilience during database or service
disruptions constitutes a significant challenge. While several tools address
resilience testing for service failures, there is a notable gap in tools
specifically designed for resilience testing of database failures. To bridge
this gap, we have developed an extension for fault injection in database
clients, which we integrated into Filibuster, an existing tool for fault
injection in services within microservice applications. Our tool systematically
simulates database disruptions, thereby enabling comprehensive testing and
evaluation of application resilience. It is versatile, supporting a range of
both SQL and NoSQL database systems, such as Redis, Apache Cassandra,
CockroachDB, PostgreSQL, and DynamoDB. A defining feature is its integration
during the development phase, complemented by an IntelliJ IDE plugin, which
offers developers visual feedback on the types, locations, and impacts of
injected faults. A video demonstration of the tool's capabilities is accessible
at https://youtu.be/bvaUVCy1m1s.
