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etcdManager.go
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etcdManager.go
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// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package discover
import (
"errors"
"github.com/goodrain/rainbond/eventlog/conf"
"time"
"golang.org/x/net/context"
"github.com/coreos/etcd/client"
)
var keyAPI client.KeysAPI
var dconf conf.DiscoverConf
//CreateETCDClient 创建etcd api
func CreateETCDClient(conf conf.DiscoverConf) (client.KeysAPI, error) {
dconf = conf
cfg := client.Config{
Endpoints: conf.EtcdAddr,
Username: conf.EtcdUser,
Password: conf.EtcdPass,
HeaderTimeoutPerRequest: time.Second * 5,
}
c, err := client.New(cfg)
if err != nil {
return nil, err
}
keyAPI = client.NewKeysAPI(c)
return keyAPI, nil
}
//SaveDockerLogInInstance 存储service和node 的对应关系
func SaveDockerLogInInstance(ctx context.Context, serviceID, instanceID string) error {
if keyAPI == nil {
return errors.New("etcd client is nil")
}
_, err := keyAPI.Set(ctx, dconf.HomePath+"/dockerloginstacne/"+serviceID, instanceID, &client.SetOptions{})
if err != nil {
if cerr, ok := err.(client.Error); ok {
if cerr.Code == client.ErrorCodeNodeExist {
_, err := keyAPI.Update(ctx, dconf.HomePath+"/dockerloginstacne/"+serviceID, instanceID)
if err != nil {
return err
}
return nil
}
}
return err
}
return nil
}
//GetDokerLogInInstance 获取应用日志接收节点
func GetDokerLogInInstance(ctx context.Context, serviceID string) (string, error) {
if keyAPI == nil {
return "", errors.New("etcd client is nil")
}
res, err := keyAPI.Get(ctx, dconf.HomePath+"/dockerloginstacne/"+serviceID, &client.GetOptions{})
if err != nil {
if cerr, ok := err.(client.Error); ok {
if cerr.Code == client.ErrorCodeKeyNotFound {
return "", nil
}
}
return "", err
}
return res.Node.Value, nil
}