// Spool spools code of an app from Cocaine Storage service
func (b *Box) Spool(ctx context.Context, name string, opts isolate.Profile) (err error) {
spoolPath := b.spoolPath
if val, ok := opts["spool"]; ok {
spoolPath = fmt.Sprintf("%s", val)
}
defer apexctx.GetLogger(ctx).WithField("name", name).WithField("spoolpath", spoolPath).Trace("processBox.Spool").Stop(&err)
data, err := b.fetch(ctx, name)
if err != nil {
return err
}
if isolate.IsCancelled(ctx) {
return nil
}
return unpackArchive(ctx, data, filepath.Join(spoolPath, name))
}
// Spawn spawns a new process
func (b *Box) Spawn(ctx context.Context, config isolate.SpawnConfig, output io.Writer) (proc isolate.Process, err error) {
spoolPath := b.spoolPath
if val, ok := config.Opts["spool"]; ok {
spoolPath = fmt.Sprintf("%s", val)
}
workDir := filepath.Join(spoolPath, config.Name)
var execPath = config.Executable
if !filepath.IsAbs(config.Executable) {
execPath = filepath.Join(workDir, config.Executable)
}
packedEnv := make([]string, 0, len(config.Env))
for k, v := range config.Env {
packedEnv = append(packedEnv, k+"="+v)
}
packedArgs := make([]string, 1, len(config.Args)*2+1)
packedArgs[0] = filepath.Base(config.Executable)
for k, v := range config.Args {
packedArgs = append(packedArgs, k, v)
}
defer apexctx.GetLogger(ctx).WithFields(
log.Fields{"name": config.Name, "executable": config.Executable,
"workDir": workDir, "execPath": execPath}).Trace("processBox.Spawn").Stop(&err)
// Update statistics
start := time.Now()
spawningQueueSize.Inc(1)
if spawningQueueSize.Count() > 10 {
spawningQueueSize.Dec(1)
return nil, syscall.EAGAIN
}
err = b.spawnSm.Acquire(ctx)
spawningQueueSize.Dec(1)
if err != nil {
return nil, isolate.ErrSpawningCancelled
}
defer b.spawnSm.Release()
// NOTE: once process was put to the map
// its waiter responsibility to Wait for it.
// NOTE: No defer here
b.mu.Lock()
if isolate.IsCancelled(ctx) {
b.mu.Unlock()
return nil, isolate.ErrSpawningCancelled
}
newProcStart := time.Now()
pr, err := newProcess(ctx, execPath, packedArgs, packedEnv, workDir, output)
newProcStarted := time.Now()
// Update has lock, so move it out from Hot spot
defer procsNewTimer.Update(newProcStarted.Sub(newProcStart))
if err != nil {
b.mu.Unlock()
procsErroredCounter.Inc(1)
return nil, err
}
b.children[pr.cmd.Process.Pid] = pr.cmd
b.mu.Unlock()
totalSpawnTimer.UpdateSince(start)
isolate.NotifyAboutStart(output)
procsCreatedCounter.Inc(1)
return pr, err
}