Merge pull request #843 from abperiasamy/logger

logrus based logger

logger.go

@@ -0,0 +1,66 @@
+/*
+ * Minio Cloud Storage, (C) 2015 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"encoding/json"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/minio/minio/pkg/probe"
+	"github.com/weekface/mgorus"
+)
+
+type fields map[string]interface{}
+
+var log = logrus.New() // Default console logger.
+
+// log2Mongo enables logging to mongodb. Use capped collection to
+func log2Mongo(url, db, collection string) *probe.Error {
+	hooker, e := mgorus.NewHooker(url, db, collection)
+	if e != nil {
+		return probe.NewError(e)
+	}
+
+	log.Hooks.Add(hooker)                   // Add mongodb hook.
+	log.Formatter = &logrus.JSONFormatter{} // JSON formatted log.
+	log.Level = logrus.InfoLevel            // Minimum log level.
+	return nil
+}
+
+func errorIf(err *probe.Error, msg string, fields map[string]interface{}) {
+	if err == nil {
+		return
+	}
+	if fields == nil {
+		fields = make(map[string]interface{})
+	}
+
+	fields["error"] = err.ToGoError()
+	if jsonErr, e := json.Marshal(err); e == nil {
+		fields["probe"] = string(jsonErr)
+	}
+	log.WithFields(fields).Error(msg)
+
+}
+
+func audit(msg string, fields logrus.Fields) {
+	if fields == nil {
+		fields = make(map[string]interface{})
+	}
+
+	log.WithFields(fields).Info(msg)
+}

logger_test.go

@@ -0,0 +1,23 @@
+/*
+ * Minio Cloud Storage (C) 2015 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import . "gopkg.in/check.v1"
+
+func (s *CmdTestSuite) TestLogger(c *C) {
+
+}

server-main.go

@@ -17,14 +17,17 @@
 package main
 
 import (
+	"fmt"
+
 	"github.com/minio/cli"
+	"github.com/minio/minio/pkg/probe"
 	"github.com/minio/minio/pkg/server"
 	"github.com/minio/minio/pkg/server/api"
 )
 
 var serverCmd = cli.Command{
 	Name:   "server",
-	Usage:  "Start minio server",
+	Usage:  "Start minio server.",
 	Action: serverMain,
 	CustomHelpTemplate: `NAME:
   minio {{.Name}} - {{.Description}}
@@ -60,7 +63,9 @@ func serverMain(c *cli.Context) {
 		cli.ShowCommandHelpAndExit(c, "server", 1)
 	}
 	apiServerConfig := getServerConfig(c)
-	if err := server.Start(apiServerConfig); err != nil {
-		Fatalln(err.Trace())
-	}
+
+	err := server.Start(apiServerConfig)
+	err = probe.NewError(fmt.Errorf("Fake error."))
+	errorIf(err.Trace(), "Failed to start the server.", nil)
+
 }

vendor.json

@@ -86,6 +86,13 @@
 			"revision": "eb527c8097e0f19a3ff7b253a3fe70545070f420",
 			"revisionTime": "2015-08-29T22:34:20-07:00"
 		},
+		{
+			"canonical": "github.com/weekface/mgorus",
+			"comment": "",
+			"local": "vendor/github.com/weekface/mgorus",
+			"revision": "9a3ff865bf11d949ab7084198479139d9746c68f",
+			"revisionTime": "2015-09-01T11:57:24+08:00"
+		},
 		{
 			"canonical": "gopkg.in/check.v1",
 			"comment": "",

vendor/github.com/weekface/mgorus/LICENSE

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

vendor/github.com/weekface/mgorus/README.md

@@ -0,0 +1,34 @@
+# Mongodb Hooks for [Logrus](https://github.com/Sirupsen/logrus) <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:"/>
+
+## Install
+
+```shell
+$ go get github.com/weekface/mgorus
+```
+
+## Usage
+
+```go
+package main
+
+import (
+	"github.com/Sirupsen/logrus"
+	"github.com/weekface/mgorus"
+)
+
+func main() {
+	log := logrus.New()
+	hooker, err := mgorus.NewHooker("localhost:27017", "db", "collection")
+	if err == nil {
+	    log.Hooks.Add(hooker)
+	}
+
+	log.WithFields(logrus.Fields{
+		"name": "zhangsan",
+		"age":  28,
+	}).Error("Hello world!")
+}
+```
+
+## License
+*MIT*

vendor/github.com/weekface/mgorus/mgorus.go

@@ -0,0 +1,47 @@
+package mgorus
+
+import (
+	"fmt"
+
+	"github.com/Sirupsen/logrus"
+	"gopkg.in/mgo.v2"
+	"gopkg.in/mgo.v2/bson"
+)
+
+type hooker struct {
+	c *mgo.Collection
+}
+
+type M bson.M
+
+func NewHooker(mgoUrl, db, collection string) (*hooker, error) {
+	session, err := mgo.Dial(mgoUrl)
+	if err != nil {
+		return nil, err
+	}
+
+	return &hooker{c: session.DB(db).C(collection)}, nil
+}
+
+func (h *hooker) Fire(entry *logrus.Entry) error {
+	entry.Data["Level"] = entry.Level.String()
+	entry.Data["Time"] = entry.Time
+	entry.Data["Message"] = entry.Message
+	mgoErr := h.c.Insert(M(entry.Data))
+	if mgoErr != nil {
+		return fmt.Errorf("Failed to send log entry to mongodb: %s", mgoErr)
+	}
+
+	return nil
+}
+
+func (h *hooker) Levels() []logrus.Level {
+	return []logrus.Level{
+		logrus.PanicLevel,
+		logrus.FatalLevel,
+		logrus.ErrorLevel,
+		logrus.WarnLevel,
+		logrus.InfoLevel,
+		logrus.DebugLevel,
+	}
+}