mirror of
https://gitee.com/rainbond/Rainbond.git
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104 lines
2.7 KiB
Go
104 lines
2.7 KiB
Go
// Copyright (C) 2014-2018 Goodrain Co., Ltd.
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// RAINBOND, Application Management Platform
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version. For any non-GPL usage of Rainbond,
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// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
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// must be obtained first.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package discovery
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import (
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"context"
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"encoding/json"
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"fmt"
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"strings"
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"time"
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c "github.com/coreos/etcd/clientv3"
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"github.com/sirupsen/logrus"
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)
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// Etcd implements Discoverier
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type etcd struct {
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cli *c.Client
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endpoints []string
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key string
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username string
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password string
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}
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// NewEtcd creates a new Discorvery which implemeted by etcd.
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func NewEtcd(info *Info) Discoverier {
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// TODO: validate endpoints
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return &etcd{
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endpoints: info.Servers,
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key: info.Key,
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username: info.Username,
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password: info.Password,
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}
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}
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// Connect connects a etcdv3 client with a given configuration.
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func (e *etcd) Connect() error {
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cli, err := c.New(c.Config{
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Endpoints: e.endpoints,
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DialTimeout: 10 * time.Second,
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Username: e.username,
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Password: e.password,
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})
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if err != nil {
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logrus.Errorf("Endpoints: %s; error connecting etcd: %v", strings.Join(e.endpoints, ","), err)
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return err
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}
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e.cli = cli
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return nil
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}
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// Fetch fetches data from Etcd.
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func (e *etcd) Fetch() ([]*Endpoint, error) {
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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if e.cli == nil {
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return nil, fmt.Errorf("can't fetching data from etcd without etcdv3 client")
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}
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resp, err := e.cli.Get(ctx, e.key, c.WithPrefix())
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if err != nil {
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return nil, fmt.Errorf("error fetching endpoints form etcd: %v", err)
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}
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if resp == nil {
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return nil, fmt.Errorf("error fetching endpoints form etcd: empty GetResponse")
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}
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var res []*Endpoint
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for _, kv := range resp.Kvs {
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var ep Endpoint
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if err := json.Unmarshal(kv.Value, &ep); err != nil {
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return nil, fmt.Errorf("error parsing the data from etcd: %v", err)
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}
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ep.Ep = strings.Replace(string(kv.Key), e.key+"/", "", -1)
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res = append(res, &ep)
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}
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return res, nil
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}
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// Close shuts down the client's etcd connections.
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func (e *etcd) Close() error {
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if e.cli != nil {
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return nil
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}
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return e.cli.Close()
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}
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