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139 lines
2.9 KiB
139 lines
2.9 KiB
/*
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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 main
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import (
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/minio/redigo/redis"
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)
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// redisLogger to send logs to Redis server
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type redisLogger struct {
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Enable bool `json:"enable"`
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Level string `json:"level"`
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Addr string `json:"address"`
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Password string `json:"password"`
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Key string `json:"key"`
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}
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type redisConn struct {
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*redis.Pool
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params redisLogger
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}
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// Dial a new connection to redis instance at addr, optionally with a password if any.
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func dialRedis(rLogger redisLogger) (*redis.Pool, error) {
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// Return error if redis not enabled.
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if !rLogger.Enable {
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return nil, errLoggerNotEnabled
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}
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addr := rLogger.Addr
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password := rLogger.Password
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rPool := &redis.Pool{
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MaxIdle: 3,
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IdleTimeout: 240 * time.Second,
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Dial: func() (redis.Conn, error) {
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c, err := redis.Dial("tcp", addr)
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if err != nil {
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return nil, err
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}
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if password != "" {
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if _, derr := c.Do("AUTH", password); derr != nil {
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c.Close()
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return nil, derr
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}
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}
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return c, err
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},
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TestOnBorrow: func(c redis.Conn, t time.Time) error {
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_, err := c.Do("PING")
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return err
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},
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}
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// Test if connection with REDIS can be established.
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rConn := rPool.Get()
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defer rConn.Close()
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// Check connection.
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_, err := rConn.Do("PING")
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if err != nil {
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return nil, err
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}
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// Return pool.
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return rPool, nil
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}
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func enableRedisLogger() error {
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rLogger := serverConfig.GetRedisLogger()
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// Dial redis.
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rPool, err := dialRedis(rLogger)
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if err != nil {
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return err
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}
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rrConn := redisConn{
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Pool: rPool,
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params: rLogger,
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}
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lvl, err := logrus.ParseLevel(rLogger.Level)
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fatalIf(err, "Unknown log level found in the config file.")
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// Add a elasticsearch hook.
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log.Hooks.Add(rrConn)
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// Set default JSON formatter.
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log.Formatter = new(logrus.JSONFormatter)
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// Set default log level to info.
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log.Level = lvl
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return nil
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}
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func (r redisConn) Fire(entry *logrus.Entry) error {
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rConn := r.Pool.Get()
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defer rConn.Close()
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data, err := entry.String()
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if err != nil {
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return err
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}
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_, err = rConn.Do("RPUSH", r.params.Key, data)
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if 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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// Required for logrus hook implementation
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func (r redisConn) Levels() []logrus.Level {
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return []logrus.Level{
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logrus.PanicLevel,
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logrus.FatalLevel,
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logrus.ErrorLevel,
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logrus.WarnLevel,
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logrus.InfoLevel,
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logrus.DebugLevel,
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}
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}
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