etcd_client/client.go

package etcd_client

import (
	"context"
	"go.etcd.io/etcd/clientv3"
	"time"
)

var client *clientv3.Client

func NewEtcdClient(endpoints []string) error {
	var err error
	config := clientv3.Config{
		Endpoints: endpoints,
		//Endpoints: []string{"47.106.183.209:31379"},
		//Endpoints:   []string{"10.43.152.46:2379"},
		DialTimeout: 5 * time.Second,
	}

	if client, err = clientv3.New(config); err != nil {
		return err
	}

	return nil
}

func Get(key string) (string, error) {
	resp, err := client.Get(context.TODO(), key)
	if err != nil {
		return "", err
	}

	if resp.Count == 0 {
		return "", nil
	}

	return string(resp.Kvs[0].Value), nil
}

func GetWithPrefix(key string) (map[string]string, error) {
	result := make(map[string]string, 0)

	resp, err := client.Get(context.TODO(), key, clientv3.WithPrefix())
	if err != nil {
		return result, err
	}

	for i := int64(0); i < resp.Count; i++ {
		result[string(resp.Kvs[i].Key)] = string(resp.Kvs[i].Value)
	}

	return result, nil
}

func Put(key, val string) error {
	_, err := client.Put(context.TODO(), key, val)

	return err
}

func Delete(key string) error {
	_, err := client.Delete(context.TODO(), key)

	return err
}

func DeleteWithPrefix(key string) error {
	_, err := client.Delete(context.TODO(), key, clientv3.WithPrefix())

	return err
}