etcd
                                Distributed reliable key-value store for the most critical data of a distributed system
                            
                        How to download and setup etcd
Open terminal and run command
                                            git clone https://github.com/etcd-io/etcd.git
                                        
                                        git clone is used to create a copy or clone of etcd repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with etcd https://github.com/etcd-io/etcd/archive/master.zip
Or simply clone etcd with SSH
                                            [email protected]:etcd-io/etcd.git