A distributed, reliable key-value store for the most critical data of a distributed system

What is etcd?

etcd is a strongly consistent, distributed key-value store that provides a reliable way to store data that needs to be accessed by a distributed system or cluster of machines. It gracefully handles leader elections during network partitions and can tolerate machine failure, even in the leader node. Learn more

Features

Simple interface

Read and write values using standard HTTP tools, such as curl

Key-value storage

Store data in hierarchically organized directories, as in a standard filesystem

Watch for changes

Watch specific keys or directories for changes and react to changes in values

Optional SSL client certificate authentication

Benchmarked at 1000s of writes/s per instance

Optional TTLs for keys expiration

Properly distributed via Raft protocol