Add logger command - also migrate from old config to newer config

config-logger-main.go

@@ -0,0 +1,78 @@
+/*
+ * 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 "github.com/minio/cli"
+
+// Configure logger
+var configLoggerCmd = cli.Command{
+	Name:   "logger",
+	Usage:  "Configure logger.",
+	Action: mainConfigLogger,
+	CustomHelpTemplate: `NAME:
+   minio config {{.Name}} - {{.Usage}}
+
+USAGE:
+   minio config {{.Name}}
+
+`,
+}
+
+func mainConfigLogger(ctx *cli.Context) {
+	if !ctx.Args().Present() || ctx.Args().First() == "help" {
+		cli.ShowCommandHelpAndExit(ctx, "logger", 1) // last argument is exit code
+	}
+	if ctx.Args().Get(0) == "mongo" {
+		enableLog2Mongo(ctx.Args().Tail())
+	}
+	if ctx.Args().Get(0) == "syslog" {
+		enableLog2Syslog(ctx.Args().Tail())
+	}
+	if ctx.Args().Get(0) == "file" {
+		enableLog2File(ctx.Args().Tail())
+	}
+}
+
+func enableLog2Mongo(args cli.Args) {
+	config, err := loadConfigV2()
+	fatalIf(err.Trace(), "Unable to load config", nil)
+
+	config.MongoLogger.Addr = args.Get(0)
+	config.MongoLogger.DB = args.Get(1)
+	config.MongoLogger.Collection = args.Get(2)
+
+	err = saveConfig(config)
+	fatalIf(err.Trace(), "Unable to save config.", nil)
+}
+
+func enableLog2Syslog(args cli.Args) {
+	config, err := loadConfigV2()
+	fatalIf(err.Trace(), "Unable to load config.", nil)
+
+	config.SyslogLogger.Addr = args.Get(0)
+	config.SyslogLogger.Network = args.Get(1)
+	err = saveConfig(config)
+	fatalIf(err.Trace(), "Unable to save config.", nil)
+}
+
+func enableLog2File(args cli.Args) {
+	config, err := loadConfigV2()
+	fatalIf(err.Trace(), "Unable to load config.", nil)
+	config.FileLogger.Filename = args.Get(0)
+	err = saveConfig(config)
+	fatalIf(err.Trace(), "Unable to save config.", nil)
+}