Prepare the release for goconserver 0.1

This commit includes the following works

- Add new flat -h, --help to show the help message.
- Add more description for goconserver configuration file.
- Modify the makefile to change the permission of directories.

Makefile

@@ -41,6 +41,7 @@ install: build
 	cp ${SERVER_BINARY} /usr/local/bin/${SERVER_BINARY}
 	cp ${CLIENT_BINARY} /usr/local/bin/${CLIENT_BINARY}
 	mkdir -p /etc/goconserver /var/log/goconserver/nodes /var/lib/goconserver
+	chmod 700 /etc/goconserver /var/log/goconserver/nodes /var/lib/goconserver
 
 	if [ ! -f "/etc/goconserver/server.conf" ];  then \
 		cp etc/goconserver/server.conf /etc/goconserver/; \

etc/goconserver/server.conf

@@ -1,26 +1,27 @@
 global:
-  host: 127.0.0.1
+  host: 127.0.0.1   # the host name or ip address as the server address, If ssl/tls is enabled, hostname must be specified here.
   # ssl_key_file: /etc/goconserver/cert/server-key.pem
   # ssl_cert_file: /etc/goconserver/cert/server-cert.pem
   # ssl_ca_cert_file: /etc/goconserver/cert/ca.pem
-  logfile: "/var/log/goconserver/server.log"
+  logfile: "/var/log/goconserver/server.log"   # the log file for goconserver daemon.
   log_level: "info"  # debug, info, warn, error, fatal, panic
-  worker: 4
-  storage_type: file
+  worker: 4   # the max cpu cores could be used
+  storage_type: file  # file or etcd, etcd is just experimental option.
 
 api:
-  port: "8089"
+  port: "8089"   # http(s) port
   http_timeout: 5 # in second
 
 console:
-  port: 12430
-  datadir: "/var/lib/goconserver/"
-  logdir: "/var/log/goconserver/nodes/"
-  target_timeout: 30
-  client_timeout: 30
-  reconnect_interval: 5  # retry interval in seconds if console could not be connected
-  rpcport: 12431
+  port: 12430    # the console session port for client(congo) to connect.
+  datadir: "/var/lib/goconserver/"       # the data file to save the session node information.
+  logdir: "/var/log/goconserver/nodes/"  # log files for session nodes.
+  target_timeout: 30    # timeout option to connect to the target, like BMC, hypervisor, etc.
+  client_timeout: 30    # timeout option for client to connect to the goconserver.
+  reconnect_interval: 5 # retry interval in second if console could not be connected.
+  rpcport: 12431        # [experimental] port for grpc server to support goconserver cluster, only available if storage_type is set to etcd.
 
+# below is experimental option for etcd storage
 etcd:
   dail_timeout: 5
   request_timeout: 2

goconserver.go

@@ -21,6 +21,7 @@ var (
 	ServerCmd *cobra.Command
 	confFile  string
 	showVer   bool
+	help      bool
 	Version   string
 	BuildTime string
 	Commit    string
@@ -34,6 +35,7 @@ func init() {
 		Long:  `goconserver daemon service`}
 	ServerCmd.Flags().StringVarP(&confFile, "config-file", "c", "/etc/goconserver/server.conf", "Specify the configuration file for goconserver daemon.")
 	ServerCmd.Flags().BoolVarP(&showVer, "version", "v", false, "Show the version of goconserver.")
+	ServerCmd.Flags().BoolVarP(&help, "help", "h", false, "Show the help message of goconserver.")
 }
 
 func loadTlsConfig(serverConfig *common.ServerConfig) *tls.Config {
@@ -61,6 +63,15 @@ func main() {
 		fmt.Printf("Version: %s, BuildTime: %s Commit: %s\n", Version, BuildTime, Commit)
 		os.Exit(0)
 	}
+	if help {
+		fmt.Printf(`Usage: goconserver [flag]
+	-c --config-file <configuration file>  Start the goconserver daemon service.
+					       If not specified, use /etc/goconserver/server.conf by default.
+	-h --help                              Show the help message.
+	-v --version                           Show the version information of the goconserver.`)
+		fmt.Println("\n")
+		os.Exit(0)
+	}
 	serverConfig, err := common.InitServerConfig(confFile)
 	if err != nil {
 		panic(err)