func run() error {
// Our massive custom usage
gnuflag.Usage = func() {
fmt.Printf("Usage: lxd [command] [options]\n")
fmt.Printf("\nCommands:\n")
fmt.Printf(" activateifneeded\n")
fmt.Printf(" Check if LXD should be started (at boot) and if so, spawns it through socket activation\n")
fmt.Printf(" daemon [--group=lxd] (default command)\n")
fmt.Printf(" Start the main LXD daemon\n")
fmt.Printf(" init [--auto] [--network-address=IP] [--network-port=8443] [--storage-backend=dir]\n")
fmt.Printf(" [--storage-create-device=DEVICE] [--storage-create-loop=SIZE] [--storage-pool=POOL]\n")
fmt.Printf(" [--trust-password=]\n")
fmt.Printf(" Setup storage and networking\n")
fmt.Printf(" ready\n")
fmt.Printf(" Tells LXD that any setup-mode configuration has been done and that it can start containers.\n")
fmt.Printf(" shutdown [--timeout=60]\n")
fmt.Printf(" Perform a clean shutdown of LXD and all running containers\n")
fmt.Printf(" waitready [--timeout=15]\n")
fmt.Printf(" Wait until LXD is ready to handle requests\n")
fmt.Printf("\n\nCommon options:\n")
fmt.Printf(" --debug\n")
fmt.Printf(" Enable debug mode\n")
fmt.Printf(" --help\n")
fmt.Printf(" Print this help message\n")
fmt.Printf(" --logfile FILE\n")
fmt.Printf(" Logfile to log to (e.g., /var/log/lxd/lxd.log)\n")
fmt.Printf(" --syslog\n")
fmt.Printf(" Enable syslog logging\n")
fmt.Printf(" --verbose\n")
fmt.Printf(" Enable verbose mode\n")
fmt.Printf(" --version\n")
fmt.Printf(" Print LXD's version number and exit\n")
fmt.Printf("\nDaemon options:\n")
fmt.Printf(" --group GROUP\n")
fmt.Printf(" Group which owns the shared socket\n")
fmt.Printf("\nDaemon debug options:\n")
fmt.Printf(" --cpuprofile FILE\n")
fmt.Printf(" Enable cpu profiling into the specified file\n")
fmt.Printf(" --memprofile FILE\n")
fmt.Printf(" Enable memory profiling into the specified file\n")
fmt.Printf(" --print-goroutines-every SECONDS\n")
fmt.Printf(" For debugging, print a complete stack trace every n seconds\n")
fmt.Printf("\nInit options:\n")
fmt.Printf(" --auto\n")
fmt.Printf(" Automatic (non-interactive) mode\n")
fmt.Printf("\nInit options for non-interactive mode (--auto):\n")
fmt.Printf(" --network-address ADDRESS\n")
fmt.Printf(" Address to bind LXD to (default: none)\n")
fmt.Printf(" --network-port PORT\n")
fmt.Printf(" Port to bind LXD to (default: 8443)\n")
fmt.Printf(" --storage-backend NAME\n")
fmt.Printf(" Storage backend to use (zfs or dir, default: dir)\n")
fmt.Printf(" --storage-create-device DEVICE\n")
fmt.Printf(" Setup device based storage using DEVICE\n")
fmt.Printf(" --storage-create-loop SIZE\n")
fmt.Printf(" Setup loop based storage with SIZE in GB\n")
fmt.Printf(" --storage-pool NAME\n")
fmt.Printf(" Storage pool to use or create\n")
fmt.Printf(" --trust-password PASSWORD\n")
fmt.Printf(" Password required to add new clients\n")
fmt.Printf("\nShutdown options:\n")
fmt.Printf(" --timeout SECONDS\n")
fmt.Printf(" How long to wait before failing\n")
fmt.Printf("\nWaitready options:\n")
fmt.Printf(" --timeout SECONDS\n")
fmt.Printf(" How long to wait before failing\n")
fmt.Printf("\n\nInternal commands (don't call these directly):\n")
fmt.Printf(" forkexec\n")
fmt.Printf(" Execute a command in a container\n")
fmt.Printf(" forkgetnet\n")
fmt.Printf(" Get container network information\n")
fmt.Printf(" forkgetfile\n")
fmt.Printf(" Grab a file from a running container\n")
fmt.Printf(" forkmigrate\n")
fmt.Printf(" Restore a container after migration\n")
fmt.Printf(" forkputfile\n")
fmt.Printf(" Push a file to a running container\n")
fmt.Printf(" forkstart\n")
fmt.Printf(" Start a container\n")
fmt.Printf(" callhook\n")
fmt.Printf(" Call a container hook\n")
}
// Parse the arguments
gnuflag.Parse(true)
// Set the global variables
debug = *argDebug
verbose = *argVerbose
if *argHelp {
// The user asked for help via --help, so we shouldn't print to
// stderr.
gnuflag.SetOut(os.Stdout)
gnuflag.Usage()
return nil
}
// Deal with --version right here
if *argVersion {
fmt.Println(shared.Version)
return nil
}
if len(shared.VarPath("unix.sock")) > 107 {
return fmt.Errorf("LXD_DIR is too long, must be < %d", 107-len("unix.sock"))
}
// Configure logging
syslog := ""
if *argSyslog {
syslog = "lxd"
}
handler := eventsHandler{}
var err error
shared.Log, err = logging.GetLogger(syslog, *argLogfile, *argVerbose, *argDebug, handler)
if err != nil {
fmt.Printf("%s", err)
return nil
}
// Process sub-commands
if len(os.Args) > 1 {
// "forkputfile", "forkgetfile", "forkmount" and "forkumount" are handled specially in nsexec.go
// "forkgetnet" is partially handled in nsexec.go (setns)
switch os.Args[1] {
// Main commands
case "activateifneeded":
return cmdActivateIfNeeded()
case "daemon":
return cmdDaemon()
case "callhook":
return cmdCallHook(os.Args[1:])
case "init":
return cmdInit()
case "ready":
return cmdReady()
case "shutdown":
return cmdShutdown()
case "waitready":
return cmdWaitReady()
// Internal commands
case "forkgetnet":
return printnet()
case "forkmigrate":
return MigrateContainer(os.Args[1:])
case "forkstart":
return startContainer(os.Args[1:])
case "forkexec":
ret, err := execContainer(os.Args[1:])
if err != nil {
fmt.Fprintf(os.Stderr, "error: %v\n", err)
}
os.Exit(ret)
}
}
// Fail if some other command is passed
if gnuflag.NArg() > 0 {
gnuflag.Usage()
return fmt.Errorf("Unknown arguments")
}
return cmdDaemon()
}
func run() error {
gnuflag.Usage = func() {
fmt.Printf("Usage: lxd [command] [options]\n\nOptions:\n")
gnuflag.PrintDefaults()
fmt.Printf("\nCommands:\n")
fmt.Printf(" shutdown\n")
fmt.Printf(" Perform a clean shutdown of LXD and all running containers\n")
fmt.Printf(" activateifneeded\n")
fmt.Printf(" Check if LXD should be started (at boot) and if so, spawn it through socket activation\n")
fmt.Printf("\nInternal commands (don't call directly):\n")
fmt.Printf(" forkgetfile\n")
fmt.Printf(" Grab a file from a running container\n")
fmt.Printf(" forkputfile\n")
fmt.Printf(" Pushes a file to a running container\n")
fmt.Printf(" forkstart\n")
fmt.Printf(" Start a container\n")
fmt.Printf(" forkmigrate\n")
fmt.Printf(" Restore a container after migration\n")
}
gnuflag.Parse(true)
if *help {
// The user asked for help via --help, so we shouldn't print to
// stderr.
gnuflag.SetOut(os.Stdout)
gnuflag.Usage()
return nil
}
if *version {
fmt.Println(shared.Version)
return nil
}
if len(shared.VarPath("unix.sock")) > 107 {
return fmt.Errorf("LXD_DIR is too long, must be < %d", 107-len("unix.sock"))
}
// Configure logging
syslog := ""
if *syslogFlag {
syslog = "lxd"
}
err := shared.SetLogger(syslog, *logfile, *verbose, *debug)
if err != nil {
fmt.Printf("%s", err)
return nil
}
// Process sub-commands
if len(os.Args) > 1 {
// "forkputfile" and "forkgetfile" are handled specially in copyfile.go
switch os.Args[1] {
case "forkstart":
return startContainer(os.Args[1:])
case "forkmigrate":
return MigrateContainer(os.Args[1:])
case "shutdown":
return cleanShutdown()
case "activateifneeded":
return activateIfNeeded()
}
}
if gnuflag.NArg() != 0 {
gnuflag.Usage()
return fmt.Errorf("Unknown arguments")
}
if *cpuProfile != "" {
f, err := os.Create(*cpuProfile)
if err != nil {
fmt.Printf("Error opening cpu profile file: %s\n", err)
return nil
}
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
if *memProfile != "" {
go memProfiler()
}
neededPrograms := []string{"setfacl", "rsync", "tar", "xz"}
for _, p := range neededPrograms {
_, err := exec.LookPath(p)
if err != nil {
return err
}
}
if *printGoroutines > 0 {
go func() {
for {
time.Sleep(time.Duration(*printGoroutines) * time.Second)
shared.PrintStack()
}
}()
}
d, err := startDaemon()
if err != nil {
if d != nil && d.db != nil {
d.db.Close()
}
return err
}
var ret error
var wg sync.WaitGroup
wg.Add(1)
go func() {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGPWR)
sig := <-ch
shared.Log.Info(
fmt.Sprintf("Received '%s signal', shutting down containers.", sig))
containersShutdown(d)
ret = d.Stop()
wg.Done()
}()
go func() {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT)
signal.Notify(ch, syscall.SIGQUIT)
signal.Notify(ch, syscall.SIGTERM)
sig := <-ch
shared.Log.Info(fmt.Sprintf("Received '%s signal', exiting.\n", sig))
ret = d.Stop()
wg.Done()
}()
wg.Wait()
return ret
}
func run() error {
gnuflag.Usage = func() {
fmt.Printf("Usage: lxd [command] [options]\n\nOptions:\n")
gnuflag.PrintDefaults()
fmt.Printf("\nCommands:\n")
fmt.Printf(" shutdown\n")
fmt.Printf(" Perform a clean shutdown of LXD and all running containers\n")
fmt.Printf(" activateifneeded\n")
fmt.Printf(" Check if LXD should be started (at boot) and if so, spawn it through socket activation\n")
fmt.Printf("\nInternal commands (don't call directly):\n")
fmt.Printf(" forkgetfile\n")
fmt.Printf(" Grab a file from a running container\n")
fmt.Printf(" forkputfile\n")
fmt.Printf(" Pushes a file to a running container\n")
fmt.Printf(" forkstart\n")
fmt.Printf(" Start a container\n")
fmt.Printf(" forkmigrate\n")
fmt.Printf(" Restore a container after migration\n")
}
gnuflag.Parse(true)
if *help {
// The user asked for help via --help, so we shouldn't print to
// stderr.
gnuflag.SetOut(os.Stdout)
gnuflag.Usage()
return nil
}
if *version {
fmt.Println(shared.Version)
return nil
}
// Configure logging
syslog := ""
if *syslogFlag {
syslog = "lxd"
}
err := shared.SetLogger(syslog, *logfile, *verbose, *debug)
if err != nil {
fmt.Printf("%s", err)
return nil
}
// Process sub-commands
if len(os.Args) > 1 {
// "forkputfile" and "forkgetfile" are handled specially in copyfile.go
switch os.Args[1] {
case "forkstart":
return startContainer(os.Args[1:])
case "forkmigrate":
return MigrateContainer(os.Args[1:])
case "shutdown":
return cleanShutdown()
case "activateifneeded":
return activateIfNeeded()
}
}
if gnuflag.NArg() != 0 {
gnuflag.Usage()
return fmt.Errorf("Unknown arguments")
}
if *cpuProfile != "" {
f, err := os.Create(*cpuProfile)
if err != nil {
fmt.Printf("Error opening cpu profile file: %s\n", err)
return nil
}
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
if *memProfile != "" {
go memProfiler()
}
neededPrograms := []string{"setfacl", "rsync", "tar", "xz"}
for _, p := range neededPrograms {
_, err := exec.LookPath(p)
if err != nil {
return err
}
}
_, err = exec.LookPath("apparmor_parser")
if err == nil && shared.IsDir("/sys/kernel/security/apparmor") {
aaEnabled = true
} else {
shared.Log.Warn("apparmor_parser binary not found or apparmor " +
"fs not mounted. AppArmor disabled.")
}
if aaEnabled && os.Getenv("LXD_SECURITY_APPARMOR") == "false" {
aaEnabled = false
shared.Log.Warn("per-container apparmor profiles have been manually disabled")
}
runningInUserns = shared.RunningInUserNS()
if aaEnabled && runningInUserns {
aaEnabled = false
shared.Log.Warn("per-container apparmor profiles disabled because we are in a user namespace")
}
/* Can we create devices? */
checkCanMknod()
if *printGoroutines > 0 {
go func() {
for {
time.Sleep(time.Duration(*printGoroutines) * time.Second)
shared.PrintStack()
}
}()
}
d, err := startDaemon()
if err != nil {
if d != nil && d.db != nil {
d.db.Close()
}
return err
}
var ret error
var wg sync.WaitGroup
wg.Add(1)
go func() {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGPWR)
sig := <-ch
shared.Log.Info(
fmt.Sprintf("Received '%s signal', shutting down containers.", sig))
containersShutdown(d)
ret = d.Stop()
wg.Done()
}()
go func() {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT)
signal.Notify(ch, syscall.SIGQUIT)
signal.Notify(ch, syscall.SIGTERM)
sig := <-ch
shared.Log.Info(fmt.Sprintf("Received '%s signal', exiting.\n", sig))
ret = d.Stop()
wg.Done()
}()
wg.Wait()
return ret
}