简单说下golang的etcd接口例子。etcd api有v2（http+json）和v3（grpc）两个版本，目前大家都用v2，所以。。。
v2: https://github.com/coreos/etcd/tree/master/client
v3: https://github.com/coreos/etcd/tree/master/clientv3
v2 example:
package main import (
"log"
"time" "golang.org/x/net/context"
"github.com/coreos/etcd/client"
) func main() {
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)
}
kapi := client.NewKeysAPI(c)
// set "/foo" key with "bar" value
log.Print("Setting '/foo' key with 'bar' value")
resp, err := kapi.Set(context.Background(), "/foo", "bar", nil)
if err != nil {
log.Fatal(err)
} else {
// print common key info
log.Printf("Set is done. Metadata is %q\n", resp)
}
// get "/foo" key's value
log.Print("Getting '/foo' key value")
resp, err = kapi.Get(context.Background(), "/foo", nil)
if err != nil {
log.Fatal(err)
} else {
// print common key info
log.Printf("Get is done. Metadata is %q\n", resp)
// print value
log.Printf("%q key has %q value\n", resp.Node.Key, resp.Node.Value)
}
}