Store distributed configuration and state without conflicts across multiple servers
Imagine a scenario where data persists even if one server stops, and multiple servers can change values simultaneously without conflicting. etcd is a key-value store for storing critical configuration or state information in distributed systems. It is written in Go and uses the Raft consensus algorithm to synchronize data across multiple nodes.
Simple API and automatic security
etcd provides a clear gRPC-based API that makes it easy to use. Security is applied automatically via TLS, and client certificate authentication can be selected if needed. Performance has been benchmarked at 10,000 write operations per second. Data integrity is guaranteed through distributed replicated log management using the Raft algorithm.
Run it locally
Pre-built binaries for macOS, Linux, Windows, and Docker simplify the installation process. By default, it uses port 2379 for client communication and port 2380 for inter-server communication. You can immediately perform basic tasks such as setting and retrieving keys using the etcdctl command. To test a cluster of three members locally, you can run a Procfile-based application using goreman.
Use in production environments
Many companies use etcd in production environments, and it is frequently used alongside applications such as Kubernetes, locksmith, vulcand, and Doorman. Development teams support etcd in critical deployment scenarios and are improving reliability through rigorous robustness testing. The v3 client library can be easily installed using the go get command.
Choosing a stable version and community participation
etcd is distributed under the Apache 2.0 license. The main branch may be unstable or broken during development, so you should refer to the release page to use a stable version. Community meetings are held every Thursday at 11:00 AM Pacific Time, and issue triage meetings are open to all contributors. It is recommended to review the security vulnerability reporting procedure and bug reporting guidelines in advance.
