8293f546af
This implementation is similar to AMQP notifications: * Notifications are published on a single topic as a JSON feed * Topic is configurable, as is the QoS. Uses the paho.mqtt.golang library for the mqtt connection, and supports connections over tcp and websockets, with optional secure tls support. * Additionally the minio server configuration has been bumped up so mqtt configuration can be added. * Configuration migration code is added with tests. MQTT is an ISO standard M2M/IoT messaging protocol and was originally designed for applications for limited bandwidth networks. Today it's use is growing in the IoT space.
124 lines
2.9 KiB
Go
124 lines
2.9 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"crypto/tls"
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"io/ioutil"
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"time"
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"github.com/Sirupsen/logrus"
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MQTT "github.com/eclipse/paho.mqtt.golang"
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)
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type mqttNotify struct {
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Enable bool `json:"enable"`
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Broker string `json:"broker"`
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Topic string `json:"topic"`
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QoS int `json:"qos"`
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ClientID string `json:"clientId"`
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User string `json:"username"`
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Password string `json:"password"`
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}
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func (m *mqttNotify) Validate() error {
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if !m.Enable {
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return nil
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}
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if _, err := checkURL(m.Broker); err != nil {
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return err
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}
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return nil
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}
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type mqttConn struct {
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params mqttNotify
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Client MQTT.Client
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}
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func dialMQTT(mqttL mqttNotify) (mqttConn, error) {
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if !mqttL.Enable {
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return mqttConn{}, errNotifyNotEnabled
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}
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connOpts := &MQTT.ClientOptions{
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ClientID: mqttL.ClientID,
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CleanSession: true,
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Username: mqttL.User,
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Password: mqttL.Password,
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MaxReconnectInterval: 1 * time.Second,
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KeepAlive: 30 * time.Second,
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TLSConfig: tls.Config{RootCAs: globalRootCAs},
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}
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connOpts.AddBroker(mqttL.Broker)
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client := MQTT.NewClient(connOpts)
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if token := client.Connect(); token.Wait() && token.Error() != nil {
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return mqttConn{}, token.Error()
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}
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return mqttConn{Client: client, params: mqttL}, nil
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}
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func newMQTTNotify(accountID string) (*logrus.Logger, error) {
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mqttL := serverConfig.Notify.GetMQTTByID(accountID)
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//connect to MQTT Server
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mqttC, err := dialMQTT(mqttL)
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if err != nil {
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return nil, err
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}
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mqttLog := logrus.New()
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// Disable writing to console.
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mqttLog.Out = ioutil.Discard
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// Add a mqtt hook.
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mqttLog.Hooks.Add(mqttC)
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// Set default JSON formatter
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mqttLog.Formatter = new(logrus.JSONFormatter)
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// successfully enabled all MQTTs
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return mqttLog, nil
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}
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// Fire if called when an event should be sent to the message broker.
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func (q mqttConn) Fire(entry *logrus.Entry) error {
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body, err := entry.String()
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if err != nil {
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return err
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}
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if !q.Client.IsConnected() {
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if token := q.Client.Connect(); token.Wait() && token.Error() != nil {
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return token.Error()
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}
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}
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token := q.Client.Publish(q.params.Topic, byte(q.params.QoS), false, body)
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if token.Wait() && token.Error() != nil {
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return token.Error()
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}
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return nil
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}
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// Levels is available logging levels.
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func (q mqttConn) Levels() []logrus.Level {
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return []logrus.Level{
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logrus.InfoLevel,
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}
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}
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