func runAgent(logger logger.Logger) chan error {
errCh := make(chan error, 1)
go func() {
defer logger.HandlePanic("Main")
logger.Debug(mainLogTag, "Starting agent")
fs := boshsys.NewOsFileSystem(logger)
app := boshapp.New(logger, fs)
err := app.Setup(os.Args)
if err != nil {
logger.Error(mainLogTag, "App setup %s", err.Error())
errCh <- err
return
}
err = app.Run()
if err != nil {
logger.Error(mainLogTag, "App run %s", err.Error())
errCh <- err
return
}
}()
return errCh
}
func fail(err error, ui biui.UI, logger boshlog.Logger, callback func()) {
logger.Error(mainLogTag, err.Error())
ui.ErrorLinef("")
ui.ErrorLinef(biuifmt.MultilineError(err))
if callback != nil {
callback()
}
os.Exit(1)
}
func mustLoadConfig(fs boshsys.FileSystem, logger boshlog.Logger) Config {
flag.Parse()
config, err := NewConfigFromPath(*configPathOpt, fs)
if err != nil {
logger.Error(mainLogTag, "Failed to load config %s", err)
os.Exit(1)
}
return config
}
func NewSignalableLogger(writerLogger logger.Logger, signalChannel chan os.Signal) (logger.Logger, chan bool) {
doneChannel := make(chan bool, 1)
go func() {
for {
<-signalChannel
writerLogger.Error("Received SIGSEGV", "Dumping goroutines...")
stackTrace := make([]byte, 10000)
runtime.Stack(stackTrace, true)
writerLogger.Error("Received SIGSEGV", string(stackTrace))
doneChannel <- true
}
}()
return writerLogger, doneChannel
}
func marshalResponse(response Response, maxResponseLength int, logger boshlog.Logger) ([]byte, error) {
respJSON, err := json.Marshal(response)
if err != nil {
logger.Error(mbusHandlerLogTag, "Failed to marshal response: %s", err.Error())
return respJSON, bosherr.WrapError(err, "Marshalling JSON response")
}
if maxResponseLength == UnlimitedResponseLength {
return respJSON, nil
}
if len(respJSON) > maxResponseLength {
respJSON, err = json.Marshal(response.Shorten())
if err != nil {
logger.Error(mbusHandlerLogTag, "Failed to marshal response: %s", err.Error())
return respJSON, bosherr.WrapError(err, "Marshalling JSON response")
}
}
if len(respJSON) > maxResponseLength {
respJSON, err = BuildErrorWithJSON(responseMaxLengthErrMsg, logger)
if err != nil {
logger.Error(mbusHandlerLogTag, "Failed to build 'max length exceeded' response: %s", err.Error())
return respJSON, bosherr.WrapError(err, "Building error")
}
}
return respJSON, nil
}
func Fail(err error, logger boshlog.Logger) {
logger.Error("main", err.Error())
os.Exit(1)
}
