func main() {
flag.Parse()
workingRootDir := path.Join(*subdDir, "root")
objectsDir := path.Join(*subdDir, "objects")
tmpDir := path.Join(*subdDir, "tmp")
netbenchFilename := path.Join(*subdDir, "netbench")
oldTriggersFilename := path.Join(*subdDir, "triggers.previous")
if !createDirectory(workingRootDir) {
os.Exit(1)
}
if !sanityCheck() {
os.Exit(1)
}
if !createDirectory(objectsDir) {
os.Exit(1)
}
if !createDirectory(tmpDir) {
os.Exit(1)
}
if !mountTmpfs(tmpDir) {
os.Exit(1)
}
if !unshareAndBind(workingRootDir) {
os.Exit(1)
}
runtime.GOMAXPROCS(int(*maxThreads))
bytesPerSecond, blocksPerSecond, firstScan, ok := getCachedFsSpeed(
workingRootDir, tmpDir)
if !ok {
os.Exit(1)
}
circularBuffer := logbuf.New(*logbufLines)
logger := log.New(circularBuffer, "", log.LstdFlags)
var configuration scanner.Configuration
var err error
configuration.ScanFilter, err = filter.NewFilter(constants.ScanExcludeList)
if err != nil {
fmt.Printf("Unable to set default scan exclusions\t%s\n", err)
os.Exit(1)
}
configuration.FsScanContext = fsrateio.NewReaderContext(bytesPerSecond,
blocksPerSecond, 0)
defaultSpeed := configuration.FsScanContext.GetContext().SpeedPercent()
if firstScan {
configuration.FsScanContext.GetContext().SetSpeedPercent(100)
}
if *showStats {
fmt.Println(configuration.FsScanContext)
}
var fsh scanner.FileSystemHistory
fsChannel := scanner.StartScannerDaemon(workingRootDir, objectsDir,
&configuration, logger)
networkReaderContext := rateio.NewReaderContext(
getCachedNetworkSpeed(netbenchFilename),
constants.DefaultNetworkSpeedPercent, &rateio.ReadMeasurer{})
configuration.NetworkReaderContext = networkReaderContext
rescanObjectCacheChannel := rpcd.Setup(&configuration, &fsh, objectsDir,
networkReaderContext, netbenchFilename, oldTriggersFilename, logger)
httpd.AddHtmlWriter(&fsh)
httpd.AddHtmlWriter(&configuration)
httpd.AddHtmlWriter(circularBuffer)
html.RegisterHtmlWriterForPattern("/dumpFileSystem", "Scanned File System",
&DumpableFileSystemHistory{&fsh})
err = httpd.StartServer(*portNum)
if err != nil {
fmt.Printf("Unable to create http server\t%s\n", err)
os.Exit(1)
}
fsh.Update(nil)
invalidateNextScanObjectCache := false
sighupChannel := make(chan os.Signal)
signal.Notify(sighupChannel, syscall.SIGHUP)
sigtermChannel := make(chan os.Signal)
signal.Notify(sigtermChannel, syscall.SIGTERM, syscall.SIGINT)
writePidfile()
for iter := 0; true; {
select {
case <-sighupChannel:
err = syscall.Exec(os.Args[0], os.Args, os.Environ())
if err != nil {
logger.Printf("Unable to Exec:%s\t%s\n", os.Args[0], err)
}
case <-sigtermChannel:
gracefulCleanup()
case fs := <-fsChannel:
if *showStats {
fmt.Printf("Completed cycle: %d\n", iter)
}
if invalidateNextScanObjectCache {
fs.ScanObjectCache()
invalidateNextScanObjectCache = false
}
fsh.Update(fs)
iter++
runtime.GC() // An opportune time to take out the garbage.
if *showStats {
fmt.Print(fsh)
fmt.Print(fsh.FileSystem())
memstats.WriteMemoryStats(os.Stdout)
fmt.Println()
}
if firstScan {
configuration.FsScanContext.GetContext().SetSpeedPercent(
defaultSpeed)
firstScan = false
if *showStats {
fmt.Println(configuration.FsScanContext)
}
}
case <-rescanObjectCacheChannel:
invalidateNextScanObjectCache = true
fsh.UpdateObjectCacheOnly()
}
}
}
func main() {
flag.Parse()
tricorder.RegisterFlags()
subdDirPathname := path.Join(*rootDir, *subdDir)
workingRootDir := path.Join(subdDirPathname, "root")
objectsDir := path.Join(workingRootDir, *subdDir, "objects")
tmpDir := path.Join(subdDirPathname, "tmp")
netbenchFilename := path.Join(subdDirPathname, "netbench")
oldTriggersFilename := path.Join(subdDirPathname, "triggers.previous")
if !createDirectory(workingRootDir) {
os.Exit(1)
}
if !sanityCheck() {
os.Exit(1)
}
if !createDirectory(tmpDir) {
os.Exit(1)
}
if !mountTmpfs(tmpDir) {
os.Exit(1)
}
if !unshareAndBind(workingRootDir) {
os.Exit(1)
}
if !createDirectory(objectsDir) {
os.Exit(1)
}
runtime.GOMAXPROCS(int(*maxThreads))
circularBuffer := logbuf.New()
logger := log.New(circularBuffer, "", log.LstdFlags)
if err := setupserver.SetupTls(); err != nil {
logger.Println(err)
circularBuffer.Flush()
if !*permitInsecureMode {
os.Exit(1)
}
}
bytesPerSecond, blocksPerSecond, firstScan, ok := getCachedFsSpeed(
workingRootDir, tmpDir)
if !ok {
os.Exit(1)
}
publishFsSpeed(bytesPerSecond, blocksPerSecond)
var configuration scanner.Configuration
var err error
configuration.ScanFilter, err = filter.New(scanExcludeList)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to set default scan exclusions: %s\n",
err)
os.Exit(1)
}
configuration.FsScanContext = fsrateio.NewReaderContext(bytesPerSecond,
blocksPerSecond, *defaultScanSpeedPercent)
defaultSpeed := configuration.FsScanContext.GetContext().SpeedPercent()
if firstScan {
configuration.FsScanContext.GetContext().SetSpeedPercent(100)
}
if *showStats {
fmt.Println(configuration.FsScanContext)
}
var fsh scanner.FileSystemHistory
mainFunc := func(fsChannel <-chan *scanner.FileSystem,
disableScanner func(disableScanner bool)) {
networkReaderContext := rateio.NewReaderContext(
getCachedNetworkSpeed(netbenchFilename),
*defaultNetworkSpeedPercent, &rateio.ReadMeasurer{})
configuration.NetworkReaderContext = networkReaderContext
invalidateNextScanObjectCache := false
rpcdHtmlWriter :=
rpcd.Setup(&configuration, &fsh, objectsDir,
workingRootDir, networkReaderContext, netbenchFilename,
oldTriggersFilename, disableScanner,
func() {
invalidateNextScanObjectCache = true
fsh.UpdateObjectCacheOnly()
},
logger)
configMetricsDir, err := tricorder.RegisterDirectory("/config")
if err != nil {
fmt.Fprintf(os.Stderr,
"Unable to create /config metrics directory: %s\n",
err)
os.Exit(1)
}
configuration.RegisterMetrics(configMetricsDir)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to create config metrics: %s\n", err)
os.Exit(1)
}
httpd.AddHtmlWriter(rpcdHtmlWriter)
httpd.AddHtmlWriter(&fsh)
httpd.AddHtmlWriter(&configuration)
httpd.AddHtmlWriter(circularBuffer)
html.RegisterHtmlWriterForPattern("/dumpFileSystem",
"Scanned File System",
&DumpableFileSystemHistory{&fsh})
if err = httpd.StartServer(*portNum); err != nil {
fmt.Fprintf(os.Stderr, "Unable to create http server: %s\n", err)
os.Exit(1)
}
fsh.Update(nil)
sighupChannel := make(chan os.Signal)
signal.Notify(sighupChannel, syscall.SIGHUP)
sigtermChannel := make(chan os.Signal)
signal.Notify(sigtermChannel, syscall.SIGTERM, syscall.SIGINT)
writePidfile()
for iter := 0; true; {
select {
case <-sighupChannel:
logger.Printf("Caught SIGHUP: re-execing with: %v\n", os.Args)
circularBuffer.Flush()
err = syscall.Exec(os.Args[0], os.Args, os.Environ())
if err != nil {
logger.Printf("Unable to Exec:%s: %s\n", os.Args[0], err)
}
case <-sigtermChannel:
logger.Printf("Caught SIGTERM: performing graceful cleanup\n")
circularBuffer.Flush()
gracefulCleanup()
case fs := <-fsChannel:
if *showStats {
fmt.Printf("Completed cycle: %d\n", iter)
}
if invalidateNextScanObjectCache {
fs.ScanObjectCache()
invalidateNextScanObjectCache = false
}
fsh.Update(fs)
iter++
runtime.GC() // An opportune time to take out the garbage.
if *showStats {
fmt.Print(fsh)
fmt.Print(fsh.FileSystem())
memstats.WriteMemoryStats(os.Stdout)
fmt.Println()
}
if firstScan {
configuration.FsScanContext.GetContext().SetSpeedPercent(
defaultSpeed)
firstScan = false
if *showStats {
fmt.Println(configuration.FsScanContext)
}
}
}
}
}
scanner.StartScanning(workingRootDir, objectsDir, &configuration, logger,
mainFunc)
}