func threadCallbacks(chanCallbacks chan wigo.INotification) {
httpEnabled := wigo.GetLocalWigo().GetConfig().Notifications.HttpEnabled
mailEnabled := wigo.GetLocalWigo().GetConfig().Notifications.EmailEnabled
for {
notification := <-chanCallbacks
// Serialize notification
json, err := notification.ToJson()
if err != nil {
log.Printf("Fail to decode notification : %s", err)
continue
}
// Send it
go func() {
if httpEnabled != 0 {
err := wigo.CallbackHttp(string(json))
if err != nil && mailEnabled == 2 {
wigo.SendMail(notification.GetSummary(), notification.GetMessage())
}
}
if mailEnabled == 1 {
wigo.SendMail(notification.GetSummary(), notification.GetMessage())
}
}()
}
}
func threadWatch(ci chan wigo.Event) {
// Vars
probeDirectories := make([]string, 0)
// First list
probeDirectories, err := wigo.ListProbesDirectories()
// Send
for _, dir := range probeDirectories {
ci <- wigo.Event{wigo.ADDDIRECTORY, wigo.GetLocalWigo().GetConfig().Global.ProbesDirectory + "/" + dir}
}
// Init inotify
watcherNew, err := fsnotify.NewWatcher()
if err != nil {
log.Fatal(err)
return
}
// Create a watcher on checks directory
err = watcherNew.Watch(wigo.GetLocalWigo().GetConfig().Global.ProbesDirectory)
if err != nil {
log.Fatal(err)
return
}
// Watch for changes forever
for {
select {
case ev := <-watcherNew.Event:
if ev.IsCreate() {
fileInfo, err := os.Stat(ev.Name)
if err != nil {
log.Printf("Error stating %s : %s", ev.Name, err)
return
}
if fileInfo.IsDir() {
ci <- wigo.Event{wigo.ADDDIRECTORY, ev.Name}
}
} else if ev.IsDelete() {
ci <- wigo.Event{wigo.REMOVEDIRECTORY, ev.Name}
} else if ev.IsRename() {
ci <- wigo.Event{wigo.REMOVEDIRECTORY, ev.Name}
}
}
}
}
func main() {
// Init Wigo
err := wigo.InitWigo()
if err != nil {
log.Printf("Error initialising Wigo : %s", err)
os.Exit(1)
}
config := wigo.GetLocalWigo().GetConfig()
if config.Global.Debug {
// Debug heap
go func() {
log.Println(http.ListenAndServe("localhost:6060", nil))
}()
}
// Launch goroutines
go threadWatch(wigo.Channels.ChanWatch)
go threadLocalChecks()
go threadCallbacks(wigo.Channels.ChanCallbacks)
go threadRemoteChecks(config.RemoteWigos.AdvancedList)
if config.Http.Enabled {
go threadHttp(config.Http)
}
if config.PushClient.Enabled {
go threadPush(config.PushClient)
}
// Signals
signal.Notify(wigo.Channels.ChanSignals, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
// Selection
for {
select {
case sig := <-wigo.Channels.ChanSignals:
switch sig {
case syscall.SIGHUP:
log.Printf("Caught SIGHUP. Reloading logger filehandle and configuration file...\n")
wigo.GetLocalWigo().InitOrReloadLogger()
case syscall.SIGTERM:
os.Exit(0)
case os.Interrupt:
os.Exit(0)
}
}
}
}
func threadHttp(config *wigo.HttpConfig) {
apiAddress := config.Address
apiPort := config.Port
m := martini.New()
if wigo.GetLocalWigo().GetConfig().Global.Debug {
// Log requests
m.Use(martini.Logger())
}
// Compress http responses with gzip
if config.Gzip {
log.Println("Http server : gzip compression enabled")
m.Use(gzip.All())
}
// Add some basic security checks
m.Use(secure.Secure(secure.Options{}))
// Http basic auth
if config.Login != "" && config.Password != "" {
log.Println("Http server : basic auth enabled")
m.Use(auth.Basic(config.Login, config.Password))
}
// Serve static files
m.Use(martini.Static("public"))
// Handle errors // TODO is this even working ?
m.Use(martini.Recovery())
// Define the routes.
r := martini.NewRouter()
r.Get("/api", func() (int, string) {
json, err := wigo.GetLocalWigo().ToJsonString()
if err != nil {
return 500, fmt.Sprintf("%s", err)
}
return 200, json
})
r.Get("/api/status", func() string { return strconv.Itoa((wigo.GetLocalWigo().GlobalStatus)) })
r.Get("/api/logs", wigo.HttpLogsHandler)
r.Get("/api/logs/indexes", wigo.HttpLogsIndexesHandler)
r.Get("/api/groups", wigo.HttpGroupsHandler)
r.Get("/api/groups/:group", wigo.HttpGroupsHandler)
r.Get("/api/groups/:group/logs", wigo.HttpLogsHandler)
r.Get("/api/groups/:group/probes/:probe/logs", wigo.HttpLogsHandler)
r.Get("/api/hosts", wigo.HttpRemotesHandler)
r.Get("/api/hosts/:hostname", wigo.HttpRemotesHandler)
r.Get("/api/hosts/:hostname/status", wigo.HttpRemotesStatusHandler)
r.Get("/api/hosts/:hostname/logs", wigo.HttpLogsHandler)
r.Get("/api/hosts/:hostname/probes", wigo.HttpRemotesProbesHandler)
r.Get("/api/hosts/:hostname/probes/:probe", wigo.HttpRemotesProbesHandler)
r.Get("/api/hosts/:hostname/probes/:probe/status", wigo.HttpRemotesProbesStatusHandler)
r.Get("/api/hosts/:hostname/probes/:probe/logs", wigo.HttpLogsHandler)
r.Get("/api/probes/:probe/logs", wigo.HttpLogsHandler)
r.Get("/api/authority/hosts", wigo.HttpAuthorityListHandler)
r.Post("/api/authority/hosts/:uuid/allow", wigo.HttpAuthorityAllowHandler)
r.Post("/api/authority/hosts/:uuid/revoke", wigo.HttpAuthorityRevokeHandler)
m.Use(func(c martini.Context, w http.ResponseWriter, r *http.Request) {
if strings.HasPrefix(r.URL.Path, "/api") {
w.Header().Set("Content-Type", "application/json")
}
})
m.Action(r.Handle)
// Create a listner and serv connections forever.
if config.SslEnabled {
address := apiAddress + ":" + strconv.Itoa(apiPort)
log.Println("Http server : starting tls server @ " + address)
tlsConfig := &tls.Config{MinVersion: tls.VersionTLS10}
server := &http.Server{Addr: address, Handler: m, TLSConfig: tlsConfig}
err := server.ListenAndServeTLS(config.SslCert, config.SslKey)
if err != nil {
log.Fatalf("Failed to start http server : %s", err)
}
} else {
address := apiAddress + ":" + strconv.Itoa(apiPort)
log.Println("Http server : starting plain http server @ " + address)
if err := http.ListenAndServe(address, m); err != nil {
log.Fatalf("Failed to start http server : %s", err)
}
}
}
func launchRemoteHostCheckRoutine(Hostname wigo.AdvancedRemoteWigoConfig) {
secondsToSleep := wigo.GetLocalWigo().GetConfig().RemoteWigos.CheckInterval
if Hostname.CheckInterval != 0 {
secondsToSleep = Hostname.CheckInterval
}
// Split host/port
host := Hostname.Hostname
if Hostname.Port != 0 {
host = Hostname.Hostname + ":" + strconv.Itoa(Hostname.Port)
} else {
host = Hostname.Hostname + ":" + strconv.Itoa(wigo.GetLocalWigo().GetConfig().Global.ListenPort)
}
// Create vars
var resp *http.Response
var body []byte
var err error
// Create http client
client := http.Client{Timeout: time.Duration(time.Second)}
sslEnabled := wigo.GetLocalWigo().GetConfig().RemoteWigos.SslEnabled
if Hostname.SslEnabled {
sslEnabled = Hostname.SslEnabled
}
var protocol string
if sslEnabled {
protocol = "https://"
} else {
protocol = "http://"
}
url := protocol + host + "/api"
req, err := http.NewRequest("GET", url, nil)
if err != nil {
log.Printf("RemoteHostCheckRoutine : Unable to build get request : %s ", err)
return
}
login := wigo.GetLocalWigo().GetConfig().RemoteWigos.Login
if Hostname.Login != "" {
login = Hostname.Login
}
password := wigo.GetLocalWigo().GetConfig().RemoteWigos.Password
if Hostname.Password != "" {
password = Hostname.Password
}
if login != "" && password != "" {
req.SetBasicAuth(login, password)
}
for {
for i := 1; i <= 3; i++ {
resp, err = client.Do(req)
if err != nil {
time.Sleep(time.Second)
} else {
body, _ = ioutil.ReadAll(resp.Body)
resp.Body.Close()
break
}
}
// Can't connect to remote wigo
if err != nil {
log.Printf("Can't connect to %s : %s", host, err)
time.Sleep(time.Second * time.Duration(secondsToSleep))
continue
}
// Instanciate object from remote return
wigoObj, err := wigo.NewWigoFromJson(body, Hostname.CheckRemotesDepth)
if err != nil {
log.Printf("Failed to parse return from host %s : %s\nReturn was : %s", host, err, body)
time.Sleep(time.Second * time.Duration(secondsToSleep))
continue
}
// Send it to main
wigo.GetLocalWigo().AddOrUpdateRemoteWigo(wigoObj)
// Sleep
time.Sleep(time.Second * time.Duration(secondsToSleep))
}
}
func execProbe(probePath string, timeOut int) {
// Get probe name
probeDirectory, probeName := path.Split(probePath)
// Create ProbeResult
var probeResult *wigo.ProbeResult
// Stat prob
fileInfo, err := os.Stat(probePath)
if err != nil {
log.Printf("Failed to stat probe %s : %s", probePath, err)
return
}
// Test if executable
if m := fileInfo.Mode(); m&0111 == 0 {
log.Printf(" - Probe %s is not executable (%s)", probePath, m.Perm().String())
return
}
// Create Command
cmd := exec.Command(probePath)
// Capture stdOut
commandOutput := make([]byte, 0)
outputPipe, err := cmd.StdoutPipe()
if err != nil {
probeResult = wigo.NewProbeResult(probeName, 500, -1, fmt.Sprintf("error getting stdout pipe: %s", err), "")
wigo.GetLocalWigo().GetLocalHost().AddOrUpdateProbe(probeResult)
return
}
errPipe, err := cmd.StderrPipe()
if err != nil {
probeResult = wigo.NewProbeResult(probeName, 500, -1, fmt.Sprintf("error getting stderr pipe: %s", err), "")
wigo.GetLocalWigo().GetLocalHost().AddOrUpdateProbe(probeResult)
return
}
combinedOutput := io.MultiReader(outputPipe, errPipe)
// Start
err = cmd.Start()
if err != nil {
probeResult = wigo.NewProbeResult(probeName, 500, -1, fmt.Sprintf("error starting command: %s", err), "")
wigo.GetLocalWigo().GetLocalHost().AddOrUpdateProbe(probeResult)
return
}
// Wait channel
done := make(chan error)
go func() {
commandOutput, err = ioutil.ReadAll(combinedOutput)
if err != nil {
probeResult = wigo.NewProbeResult(probeName, 500, -1, fmt.Sprintf("error reading pipe: %s", err), "")
wigo.GetLocalWigo().GetLocalHost().AddOrUpdateProbe(probeResult)
return
}
done <- cmd.Wait()
}()
// Timeout or result ?
select {
case err := <-done:
if err != nil {
// Get exit code
exitCode := 1
if exiterr, ok := err.(*exec.ExitError); ok {
// The program has exited with an exit code != 0
// This works on both Unix and Windows. Although package
// syscall is generally platform dependent, WaitStatus is
// defined for both Unix and Windows and in both cases has
// an ExitStatus() method with the same signature.
if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
exitCode = status.ExitStatus()
}
}
if exitCode == 12 {
log.Printf(" - Probe %s is disabled\n", probeName)
return
}
if exitCode == 13 {
log.Printf(" - Probe %s responded with special exit code 13. Discarding result...\n", probeName)
// Disabling it
wigo.GetLocalWigo().DisableProbe(probeName)
// Remove result if present
wigo.GetLocalWigo().GetLocalHost().DeleteProbeByName(probeName)
return
}
// Create error probe
probeResult = wigo.NewProbeResult(probeName, 500, exitCode, fmt.Sprintf("error: %s", err), string(commandOutput))
wigo.GetLocalWigo().GetLocalHost().AddOrUpdateProbe(probeResult)
log.Printf(" - Probe %s in directory %s failed to exec : %s\n", probeResult.Name, probeDirectory, err)
return
} else {
probeResult = wigo.NewProbeResultFromJson(probeName, commandOutput)
wigo.GetLocalWigo().GetLocalHost().AddOrUpdateProbe(probeResult)
log.Printf(" - Probe %s in directory %s responded with status : %d\n", probeResult.Name, probeDirectory, probeResult.Status)
if probeResult.Status > 100 {
log.Printf(" --> %s\n", probeResult.Message)
}
return
}
case <-time.After(time.Second * time.Duration(timeOut)):
probeResult = wigo.NewProbeResult(probeName, 500, -1, "Probe timeout", "")
wigo.GetLocalWigo().GetLocalHost().AddOrUpdateProbe(probeResult)
log.Printf(" - Probe %s in directory %s timeouted..\n", probeResult.Name, probeDirectory)
// Killing it..
log.Printf(" - Killing it...")
err := cmd.Process.Kill()
if err != nil {
log.Printf(" - Failed to kill probe %s : %s\n", probeName, err)
// TODO handle error
} else {
log.Printf(" - Probe %s successfully killed\n", probeName)
}
return
}
}
func threadLocalChecks() {
// Directory list
var checksDirectories list.List
// Listen events
go func() {
for {
ev := <-wigo.Channels.ChanWatch
switch ev.Type {
case wigo.ADDDIRECTORY:
var directory string = ev.Value.(string)
log.Println("Adding directory", directory)
checksDirectories.PushBack(directory)
// Create local list of probes to detect removes
currentProbesList, err := wigo.ListProbesInDirectory(directory)
if err != nil {
log.Printf("Fail to read directory %s : %s", directory, err)
}
go func() {
for {
// Am I still a valid directory ?
stillValid := false
for e := checksDirectories.Front(); e != nil; e = e.Next() {
if e.Value == directory {
stillValid = true
}
}
if !stillValid {
// Delete probes results of this directory
for c := currentProbesList.Front(); c != nil; c = c.Next() {
probeName := c.Value.(string)
if _, ok := wigo.GetLocalWigo().GetLocalHost().Probes[probeName]; ok {
delete(wigo.GetLocalWigo().GetLocalHost().Probes, probeName)
}
}
return
}
// Guess sleep time from dir
sleepTime := path.Base(directory)
sleepTImeInt, err := strconv.Atoi(sleepTime)
if err != nil {
log.Printf(" - Weird folder name %s. Doing nothing...\n", directory)
return
}
// Update probes list
newProbesList, err := wigo.ListProbesInDirectory(directory)
if err != nil {
break
}
// Check new probes
for n := newProbesList.Front(); n != nil; n = n.Next() {
newProbeName := n.Value.(string)
probeIsNew := true
// Add probe if new
for j := currentProbesList.Front(); j != nil; j = j.Next() {
probeName := j.Value.(string)
if probeName == newProbeName {
probeIsNew = false
}
}
if probeIsNew {
currentProbesList.PushBack(newProbeName)
log.Printf("Probe %s has been added in directory %s\n", newProbeName, directory)
}
}
// Check deleted probes
for c := currentProbesList.Front(); c != nil; c = c.Next() {
probeName := c.Value.(string)
probeIsDeleted := true
for n := newProbesList.Front(); n != nil; n = n.Next() {
newProbeName := n.Value.(string)
if probeName == newProbeName {
probeIsDeleted = false
}
}
if probeIsDeleted {
log.Printf("Probe %s has been deleted from filesystem.. Removing it from directory.\n", probeName)
currentProbesList.Remove(c)
wigo.GetLocalWigo().LocalHost.DeleteProbeByName(probeName)
continue
}
}
// Launching probes
log.Printf("Launching probes of directory %s", directory)
for c := currentProbesList.Front(); c != nil; c = c.Next() {
probeName := c.Value.(string)
if wigo.GetLocalWigo().IsProbeDisabled(probeName) {
log.Printf(" - Probe %s has been disabled earlier. Restart wigo to enable it again!", probeName)
} else {
go execProbe(directory+"/"+probeName, sleepTImeInt-1)
}
}
time.Sleep(time.Second * time.Duration(sleepTImeInt))
}
}()
case wigo.REMOVEDIRECTORY:
for el := checksDirectories.Front(); el != nil; el = el.Next() {
if el.Value == ev.Value {
log.Println("Removing directory ", ev.Value)
checksDirectories.Remove(el)
break
}
}
}
}
}()
}
