mirror of
https://gitee.com/rainbond/Rainbond.git
synced 2024-12-04 20:57:38 +08:00
131 lines
3.3 KiB
Go
131 lines
3.3 KiB
Go
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// RAINBOND, Application Management Platform
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// Copyright (C) 2014-2017 Goodrain Co., Ltd.
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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 discover
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import (
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"github.com/goodrain/rainbond/cmd/entrance/option"
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"context"
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"fmt"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/coreos/etcd/clientv3"
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)
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//Manager discover manager
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type Manager struct {
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IP string
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Port int
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RegTime int64
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Etcdclientv3 *clientv3.Client
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Ctx context.Context
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Cancel func()
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LID clientv3.LeaseID
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Done chan struct{}
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//EventServerAddress []string
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}
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//NewDiscoverManager create discover manager
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func NewDiscoverManager(config option.Config) (*Manager, error) {
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etcdclientv3, err := clientv3.New(clientv3.Config{
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Endpoints: config.EtcdEndPoints,
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})
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if err != nil {
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return nil, err
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}
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ctx, cancel := context.WithCancel(context.Background())
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return &Manager{
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Etcdclientv3: etcdclientv3,
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Ctx: ctx,
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Cancel: cancel,
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IP: config.BindIP,
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Port: config.BindPort,
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RegTime: 5,
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}, nil
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}
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//Start start
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func (m *Manager) Start() {
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go m.keepAlive()
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defer m.CancelIP()
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}
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//CancelIP CancelIP
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func (m *Manager) CancelIP() error {
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ctx, cancel := context.WithTimeout(m.Ctx, time.Second*5)
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defer cancel()
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if _, err := m.Etcdclientv3.Delete(ctx, m.httpKey()); err != nil {
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return err
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}
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logrus.Info(fmt.Sprintf("cancel host %s into etcd", fmt.Sprintf("%s:%d", m.IP, m.Port)))
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return nil
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}
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func (m *Manager) keepAlive() {
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duration := time.Duration(m.RegTime) * time.Second
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timer := time.NewTimer(duration)
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for {
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select {
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case <-m.Done:
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return
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case <-timer.C:
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if m.LID > 0 {
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_, err := m.Etcdclientv3.KeepAliveOnce(m.Ctx, m.LID)
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if err == nil {
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timer.Reset(duration)
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continue
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}
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logrus.Warnf("%s lid[%x] keepAlive err: %s, try to reset...", m.domain(), m.LID, err.Error())
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m.LID = 0
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}
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if err := m.set(); err != nil {
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logrus.Warnf("%s set lid err: %s, try to reset after %d seconds...", m.domain(), err.Error(), m.RegTime)
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} else {
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logrus.Infof("%s set lid[%x] success", m.domain(), m.LID)
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}
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timer.Reset(duration)
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}
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}
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}
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func (m *Manager) domain() string {
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return fmt.Sprintf("%s:%v", m.IP, m.Port)
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}
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func (m *Manager) httpKey() string {
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return fmt.Sprintf("/traefik/backends/acp_entrance/servers/%s/url", m.IP)
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}
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func (m *Manager) set() error {
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resp, err := m.Etcdclientv3.Grant(m.Ctx, m.RegTime+2)
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if err != nil {
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return err
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}
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if _, err := m.Etcdclientv3.Put(m.Ctx,
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m.httpKey(),
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m.domain(),
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clientv3.WithLease(resp.ID)); err != nil {
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return err
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}
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m.LID = resp.ID
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return nil
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}
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