Golang's ETCD Client

This is a creation in Article, where the information may have evolved or changed.

Etcd and Consul are very well-known service governance tools. This article first to discuss the use of ETCD.

Learn to use

Installation

go get github.com/coreos/etcd/client

Reference

"github.com/coreos/etcd/client"

Example

cfg := client.Config{    Endpoints:               []string{"http://127.0.0.1:2379"},    Transport:               client.DefaultTransport,    // set timeout per request to fail fast when the target endpoint is unavailable    HeaderTimeoutPerRequest: time.Second,}c, err := client.New(cfg)if err != nil {    log.Fatal(err)}

Instructions for use

Create Client

c, err := client.New(cfg)if err != nil {    log.Fatal(err)}

Setting up the configuration

kapi := client.NewKeysAPI(c)log.Print("Setting '/foo' key with 'bar' value")resp, err := kapi.Set(context.Background(), "/foo", "bar", nil)if err != nil {    log.Fatal(err)} else {    log.Printf("Set is done. Metadata is %q\n", resp)}

Read configuration

kapi := client.NewKeysAPI(c)resp, err = kapi.Get(context.Background(), "/foo", nil)if err != nil {    log.Fatal(err)} else {    log.Printf("Get is done. Metadata is %q\n", resp)    log.Printf("%q key has %q value\n", resp.Node.Key, resp.Node.Value)}

Subscription configuration changes