Etcd和Consul都是非常出名的服务化治理工具。本篇先来讲一下Etcd的使用。

学会使用

安装

go get github.com/coreos/etcd/client

引用

"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)
}

使用说明

创建客户端

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

设置配置

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)
}

读取配置

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)
}

订阅配置变更