etcd

etcd is a distributed key-value store used to manage configuration data and provide service discovery for distributed systems. Think of it as a reliable database that stores important information in a way that multiple applications can access and update it seamlessly, even if some parts fail. etcd ensures that this data remains consistent and up-to-date across different servers, making it essential for applications that need to work together in a cloud or microservices environment. It’s widely used in container orchestration tools like Kubernetes to keep track of system state and configuration.