etcd3.4.36

etcd gives distributed application components a shared place to read and write small, important pieces of data as key-value pairs. It keeps that information available across a cluster, helping networked services coordinate when they run on different machines or application parts. Canonical publishes etcd, a resilient key-value store originating with CoreOS.

The store uses the RAFT consensus algorithm to manage failover among cluster members. When failover conditions occur, RAFT allows the cluster to continue serving its key-value data rather than leaving each application component with a separate view. Its compact data model suits configuration, coordination state, and other values that are small but essential to an application’s operation. etcd is particularly familiar in the Docker community, where connected services can use it as a shared store for distributed application data.

Developers and operators use it when clustered or networked systems need common state across multiple application components. Version 3.4.36 runs on Linux and requires snapd. The available architectures are amd64, arm64, ppc64el, and s390x. etcd is freeware.