/
main.go
199 lines (171 loc) · 5.36 KB
/
main.go
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package main
import (
"errors"
"flag"
"fmt"
"net/http"
_ "net/http/pprof"
"os"
"os/signal"
"runtime"
"runtime/trace"
"strconv"
"syscall"
"time"
"github.com/famarks/grafarg/pkg/extensions"
"github.com/famarks/grafarg/pkg/infra/log"
"github.com/famarks/grafarg/pkg/infra/metrics"
"github.com/famarks/grafarg/pkg/server"
_ "github.com/famarks/grafarg/pkg/services/alerting/conditions"
_ "github.com/famarks/grafarg/pkg/services/alerting/notifiers"
"github.com/famarks/grafarg/pkg/setting"
_ "github.com/famarks/grafarg/pkg/tsdb/azuremonitor"
_ "github.com/famarks/grafarg/pkg/tsdb/cloudmonitoring"
_ "github.com/famarks/grafarg/pkg/tsdb/cloudwatch"
_ "github.com/famarks/grafarg/pkg/tsdb/elasticsearch"
_ "github.com/famarks/grafarg/pkg/tsdb/graphite"
_ "github.com/famarks/grafarg/pkg/tsdb/influxdb"
_ "github.com/famarks/grafarg/pkg/tsdb/loki"
_ "github.com/famarks/grafarg/pkg/tsdb/mysql"
_ "github.com/famarks/grafarg/pkg/tsdb/opentsdb"
_ "github.com/famarks/grafarg/pkg/tsdb/postgres"
_ "github.com/famarks/grafarg/pkg/tsdb/prometheus"
_ "github.com/famarks/grafarg/pkg/tsdb/tempo"
_ "github.com/famarks/grafarg/pkg/tsdb/testdatasource"
)
// The following variables cannot be constants, since they can be overridden through the -X link flag
var version = "5.0.0"
var commit = "NA"
var buildBranch = "master"
var buildstamp string
type exitWithCode struct {
reason string
code int
}
func (e exitWithCode) Error() string {
return e.reason
}
func main() {
var (
configFile = flag.String("config", "", "path to config file")
homePath = flag.String("homepath", "", "path to grafarg install/home path, defaults to working directory")
pidFile = flag.String("pidfile", "", "path to pid file")
packaging = flag.String("packaging", "unknown", "describes the way Grafarg was installed")
v = flag.Bool("v", false, "prints current version and exits")
profile = flag.Bool("profile", false, "Turn on pprof profiling")
profilePort = flag.Uint64("profile-port", 6060, "Define custom port for profiling")
tracing = flag.Bool("tracing", false, "Turn on tracing")
tracingFile = flag.String("tracing-file", "trace.out", "Define tracing output file")
)
flag.Parse()
if *v {
fmt.Printf("Version %s (commit: %s, branch: %s)\n", version, commit, buildBranch)
os.Exit(0)
}
profileDiagnostics := newProfilingDiagnostics(*profile, *profilePort)
if err := profileDiagnostics.overrideWithEnv(); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
traceDiagnostics := newTracingDiagnostics(*tracing, *tracingFile)
if err := traceDiagnostics.overrideWithEnv(); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
if profileDiagnostics.enabled {
fmt.Println("diagnostics: pprof profiling enabled", "port", profileDiagnostics.port)
runtime.SetBlockProfileRate(1)
go func() {
err := http.ListenAndServe(fmt.Sprintf("localhost:%d", profileDiagnostics.port), nil)
if err != nil {
panic(err)
}
}()
}
if err := executeServer(*configFile, *homePath, *pidFile, *packaging, traceDiagnostics); err != nil {
code := 1
var ewc exitWithCode
if errors.As(err, &ewc) {
code = ewc.code
}
if code != 0 {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
}
os.Exit(code)
}
}
func executeServer(configFile, homePath, pidFile, packaging string, traceDiagnostics *tracingDiagnostics) error {
defer func() {
if err := log.Close(); err != nil {
fmt.Fprintf(os.Stderr, "Failed to close log: %s\n", err)
}
}()
if traceDiagnostics.enabled {
fmt.Println("diagnostics: tracing enabled", "file", traceDiagnostics.file)
f, err := os.Create(traceDiagnostics.file)
if err != nil {
panic(err)
}
defer func() {
if err := f.Close(); err != nil {
log.Error("Failed to write trace diagnostics", "path", traceDiagnostics.file, "err", err)
}
}()
if err := trace.Start(f); err != nil {
panic(err)
}
defer trace.Stop()
}
buildstampInt64, err := strconv.ParseInt(buildstamp, 10, 64)
if err != nil || buildstampInt64 == 0 {
buildstampInt64 = time.Now().Unix()
}
setting.BuildVersion = version
setting.BuildCommit = commit
setting.BuildStamp = buildstampInt64
setting.BuildBranch = buildBranch
setting.IsEnterprise = extensions.IsEnterprise
setting.Packaging = validPackaging(packaging)
metrics.SetBuildInformation(version, commit, buildBranch)
s, err := server.New(server.Config{
ConfigFile: configFile, HomePath: homePath, PidFile: pidFile,
Version: version, Commit: commit, BuildBranch: buildBranch,
})
if err != nil {
return err
}
go listenToSystemSignals(s)
if err := s.Run(); err != nil {
code := s.ExitCode(err)
return exitWithCode{
reason: err.Error(),
code: code,
}
}
return nil
}
func validPackaging(packaging string) string {
validTypes := []string{"dev", "deb", "rpm", "docker", "brew", "hosted", "unknown"}
for _, vt := range validTypes {
if packaging == vt {
return packaging
}
}
return "unknown"
}
func listenToSystemSignals(s *server.Server) {
signalChan := make(chan os.Signal, 1)
sighupChan := make(chan os.Signal, 1)
signal.Notify(sighupChan, syscall.SIGHUP)
signal.Notify(signalChan, os.Interrupt, syscall.SIGTERM)
for {
select {
case <-sighupChan:
if err := log.Reload(); err != nil {
fmt.Fprintf(os.Stderr, "Failed to reload loggers: %s\n", err)
}
case sig := <-signalChan:
s.Shutdown(fmt.Sprintf("System signal: %s", sig))
}
}
}