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main.go
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main.go
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package main
import (
"errors"
"flag"
"fmt"
"github.com/admicrovn/wazuh-integratord/config"
"github.com/admicrovn/wazuh-integratord/integrator"
"github.com/admicrovn/wazuh-integratord/logger"
"github.com/fsnotify/fsnotify"
"github.com/sevlyar/go-daemon"
log "github.com/sirupsen/logrus"
"os"
"os/user"
"path"
"strconv"
"syscall"
)
const (
defaultOssecPath = "/var/ossec/"
defaultPidFile = "/var/ossec/var/run/wazuh-integratord.pid"
defaultLogFile = "/var/ossec/logs/ossec.log"
defaultUser = "wazuh"
appName = "wazuh-integratord"
)
type Formatter struct {
TimeFormat string
LevelDesc []string
}
func (f *Formatter) Format(entry *log.Entry) ([]byte, error) {
timestamp := entry.Time.Format(f.TimeFormat)
return []byte(fmt.Sprintf("%s %s: %s: %s\n", timestamp, appName, f.LevelDesc[entry.Level], entry.Message)), nil
}
var levelMap = map[string]log.Level{
"trace": log.TraceLevel,
"debug": log.DebugLevel,
"info": log.InfoLevel,
"warn": log.WarnLevel,
"error": log.ErrorLevel,
"panic": log.PanicLevel,
"fatal": log.FatalLevel,
}
func getLogLevel(lvl string) (log.Level, error) {
if level, ok := levelMap[lvl]; ok {
return level, nil
}
return 0, errors.New("invalid log level")
}
func main() {
logLevel := flag.String("log-level", "info", "Log level")
testConfig := flag.Bool("t", false, "Test configuration")
foreground := flag.Bool("f", false, "Run in foreground mode")
flag.Usage = func() {
fmt.Fprintf(flag.CommandLine.Output(), "\nThe Wazuh Integratord is a daemon that allows "+
"Wazuh to connect to external APIs and alerting tools such as Slack, VirusTotal and PagerDuty.\n"+
"This version is written in Go, it was created to help to parse alerts log and alerting faster.\n\n")
fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s:\n", os.Args[0])
flag.PrintDefaults()
}
flag.Parse()
logFormat := new(Formatter)
logFormat.TimeFormat = "2006/01/02 15:04:05"
logFormat.LevelDesc = []string{"PANIC", "FATAL", "ERROR", "WARNING", "INFO", "DEBUG", "TRACE"}
log.SetFormatter(logFormat)
level, err := getLogLevel(*logLevel)
if err != nil {
log.Fatalf("invalid log level. must be one of: panic, fatal, error, warn, info, debug, trace")
}
log.SetLevel(level)
var cfg *config.Config
cfg, err = config.GetConfig()
if err != nil {
log.Fatalf("config err: %s", err)
}
if *testConfig {
fmt.Println("Configuration file is valid")
return
}
if !*foreground {
pidFile := defaultPidFile
logFile := defaultLogFile
ossecPath := defaultOssecPath
var cred *syscall.Credential
// development
if os.Getenv("ENV") == integrator.DEV {
pidFile = "./wazuh-integratord.pid"
logFile = "./ossec.log"
ossecPath = "./"
} else {
var u *user.User
u, err = user.Lookup(defaultUser)
if err != nil {
log.Fatalf("get uid err: %s", err)
}
uid, _ := strconv.ParseUint(u.Uid, 10, 32)
gid, _ := strconv.ParseUint(u.Gid, 10, 32)
cred = &syscall.Credential{
Uid: uint32(uid),
Gid: uint32(gid),
}
}
dCtx := &daemon.Context{
PidFileName: pidFile,
PidFilePerm: 0644,
LogFileName: logFile,
LogFilePerm: 0660,
WorkDir: ossecPath,
Credential: cred,
Umask: 027,
}
var d *os.Process
d, err = dCtx.Reborn()
if err != nil {
log.Fatalf("unable to run: %s", err)
}
if d != nil {
return
}
// on production, we will write pid to a pid file in format: wazuh-integratord-<pid>.pid
if os.Getenv("ENV") != integrator.DEV {
var proc *os.Process
proc, err = dCtx.Search()
if err != nil {
log.Fatalf("unable to search: %s", err)
}
newPidFile := path.Join(defaultOssecPath, "var", "run", fmt.Sprintf("%s-%d.pid", appName, proc.Pid))
err = writePid(proc.Pid, newPidFile)
if err != nil {
log.Fatalf("unable to write pid: %s", err)
}
}
defer dCtx.Release()
go setupLog(logFile)
}
i := integrator.New(cfg)
go i.MonitorWaitingQueue()
go i.RunIntegratorSocketServer()
i.Run()
}
func setupLog(logFile string) {
lf, err := logger.NewLogFile(logFile, os.Stderr)
if err != nil {
log.Fatalf("unable to setup log file: %s", err.Error())
}
log.SetOutput(lf)
var watcher *fsnotify.Watcher
watcher, err = fsnotify.NewWatcher()
if err != nil {
log.Fatal(err)
}
defer watcher.Close()
done := make(chan bool)
go func() {
for {
select {
case event, ok := <-watcher.Events:
if !ok {
return
}
if event.Op&fsnotify.Rename == fsnotify.Rename {
log.Infof("log rotated: %s", event.Name)
if err = lf.Rotate(); err != nil {
log.Fatalf("unable to rotate log: %s", err)
}
}
case err, ok := <-watcher.Errors:
if !ok {
return
}
log.Errorf("watch err: %s", err)
}
}
}()
err = watcher.Add(logFile)
if err != nil {
log.Panic(err)
}
<-done
}
// write pid to file
func writePid(pid int, pidFile string) error {
return os.WriteFile(pidFile, []byte(strconv.Itoa(pid)), 0640) //nolint:gosec
}