packaging: fixed issue with pid file on systemd systems, fixes #9133

pkg/cmd/grafana-server/server.go

@@ -2,7 +2,12 @@ package main
 
 import (
 	"context"
+	"flag"
+	"io/ioutil"
 	"os"
+	"path/filepath"
+	"strconv"
+	"time"
 
 	"golang.org/x/sync/errgroup"
 
@@ -45,8 +50,9 @@ type GrafanaServerImpl struct {
 func (g *GrafanaServerImpl) Start() {
 	go listenToSystemSignals(g)
 
-	writePIDFile()
-	initRuntime()
+	g.initLogging()
+	g.writePIDFile()
+
 	initSql()
 	metrics.Init()
 	search.Init()
@@ -74,6 +80,22 @@ func (g *GrafanaServerImpl) Start() {
 	g.startHttpServer()
 }
 
+func (g *GrafanaServerImpl) initLogging() {
+	err := setting.NewConfigContext(&setting.CommandLineArgs{
+		Config:   *configFile,
+		HomePath: *homePath,
+		Args:     flag.Args(),
+	})
+
+	if err != nil {
+		g.log.Error(err.Error())
+		os.Exit(1)
+	}
+
+	g.log.Info("Starting Grafana", "version", version, "commit", commit, "compiled", time.Unix(setting.BuildStamp, 0))
+	setting.LogConfigurationInfo()
+}
+
 func (g *GrafanaServerImpl) startHttpServer() {
 	g.httpServer = api.NewHttpServer()
 
@@ -101,3 +123,23 @@ func (g *GrafanaServerImpl) Shutdown(code int, reason string) {
 	log.Close()
 	os.Exit(code)
 }
+
+func (g *GrafanaServerImpl) writePIDFile() {
+	if *pidFile == "" {
+		return
+	}
+
+	// Ensure the required directory structure exists.
+	err := os.MkdirAll(filepath.Dir(*pidFile), 0700)
+	if err != nil {
+		g.log.Error("Failed to verify pid directory", "error", err)
+		os.Exit(1)
+	}
+
+	// Retrieve the PID and write it.
+	pid := strconv.Itoa(os.Getpid())
+	if err := ioutil.WriteFile(*pidFile, []byte(pid), 0644); err != nil {
+		g.log.Error("Failed to write pidfile", "error", err)
+		os.Exit(1)
+	}
+}