Etcd

Etcd is an open-source, distributed key-value store designed to securely store configuration data and maintain distributed systems’ state. Created by CoreOS, Etcd facilitates reliable configuration management and service discovery, crucial for container orchestration platforms like Kubernetes.

Etcd was created by CoreOS, a company that specializes in Linux container technology, in 2013. Designed to solve the issue of distributed configuration management, Etcd ensures that every change to the system’s configuration is reliably stored and distributed across clusters. The protocol uses the Raft consensus algorithm to maintain a consistent state across a distributed system, ensuring that the data remains highly available and fault-tolerant. Etcd is often used in conjunction with Kubernetes to manage the state information necessary for container orchestration, such as pod and service data. Written in Go, it emphasizes simplicity, speed, and ease of use, making it a popular choice for managing distributed systems at scale.