Adds log-path config

cmd/server.go

@@ -79,6 +79,7 @@ on the configured port.`,
 	flags.StringSliceVarP(&Server.Config.Cluster.Nodes, "cluster.hosts", "", []string{}, "Comma separated list of hosts in cluster.")
 	flags.DurationVarP((*time.Duration)(&Server.Config.Cluster.PollingInterval), "cluster.poll-interval", "", time.Minute, "Polling interval for cluster.") // TODO what actually is this?
 	flags.StringVarP(&Server.Config.Plugins.Path, "plugins.path", "", "", "Path to plugin directory.")
+	flags.StringVar(&Server.Config.LogPath, "log-path", "", "Log path")
 	flags.DurationVarP((*time.Duration)(&Server.Config.AntiEntropy.Interval), "anti-entropy.interval", "", time.Minute*10, "Interval at which to run anti-entropy routine.")
 	flags.StringVarP(&Server.CPUProfile, "profile.cpu", "", "", "Where to store CPU profile.")
 	flags.DurationVarP(&Server.CPUTime, "profile.cpu-time", "", 30*time.Second, "CPU profile duration.")

cmd/server_test.go

@@ -23,6 +23,8 @@ func TestServerConfig(t *testing.T) {
 	failErr(t, err, "making data dir")
 	profFile, err := ioutil.TempFile("", "")
 	failErr(t, err, "making temp file")
+	logFile, err := ioutil.TempFile("", "")
+	failErr(t, err, "making log file")
 	tests := []commandTest{
 		// TEST 0
 		{
@@ -99,6 +101,24 @@ data-dir = "` + actualDataDir + `"
 				return v.Error()
 			},
 		},
+		// TEST 3 - test log path can be read from command line and it's priority is highest
+		{
+			args: []string{"server", "--log-path", logFile.Name()},
+			env:  map[string]string{"PILOSA_LOG_PATH": "/tmp/mylog_env"},
+			cfgFileContent: `
+log-path = "/tmp/mylog_cfg"
+`,
+			validation: func() error {
+				v := validator{}
+				v.Check(cmd.Server.Config.LogPath, logFile.Name())
+				if err := v.Error(); err != nil {
+					return v.Error()
+				}
+				// check that the log file was created
+				_, err = logFile.Stat()
+				return err
+			},
+		},
 	}
 
 	// run server tests

config.go

@@ -26,6 +26,8 @@ type Config struct {
 	AntiEntropy struct {
 		Interval Duration `toml:"interval"`
 	} `toml:"anti-entropy"`
+
+	LogPath string `toml:"log-path"`
 }
 
 // NewConfig returns an instance of Config with default options.

server/server.go

@@ -68,7 +68,15 @@ func (m *Command) Run(args ...string) (err error) {
 	}
 
 	// Setup logging output.
-	m.Server.LogOutput = m.Stderr
+	if m.Config.LogPath == "" {
+		m.Server.LogOutput = m.Stderr
+	} else {
+		logFile, err := os.OpenFile(m.Config.LogPath, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0600)
+		if err != nil {
+			return err
+		}
+		m.Server.LogOutput = logFile
+	}
 
 	// Configure index.
 	fmt.Fprintf(m.Stderr, "Using data from: %s\n", m.Config.DataDir)
@@ -109,6 +117,12 @@ func normalizeHost(host string) (string, error) {
 // Close shuts down the server.
 func (m *Command) Close() error {
 	err := m.Server.Close()
+	logOutput := m.Server.LogOutput
+	if logOutput != m.Stderr {
+		if file, ok := logOutput.(*os.File); ok {
+			file.Close()
+		}
+	}
 	close(m.Done)
 	return err
 }