In the preceding chapter, we implemented the Raft consensus algorithm using the Go programming language, resulting in our custom Raft library named “eraft.” Building upon this foundation, this chapter focuses on constructing a distributed key-value store system called “eraftkv,” which leverages our eraft library. We will begin by outlining the architecture of eraftkv, providing a comprehensive overview of its design principles and components. Subsequently, we will guide you through a hands-on deployment process, allowing you to experience firsthand the robustness and efficiency of a distributed key-value system. The chapter concludes with an in-depth exploration of eraftkv’s implementation, dissecting its core functionalities and discussing key design decisions.