Esempio n. 1
0
// configureLoggers sets up the standard out/error file rotators
func (e *UniversalExecutor) configureLoggers() error {
	e.rotatorLock.Lock()
	defer e.rotatorLock.Unlock()

	logFileSize := int64(e.ctx.Task.LogConfig.MaxFileSizeMB * 1024 * 1024)
	if e.lro == nil {
		lro, err := logging.NewFileRotator(e.ctx.AllocDir.LogDir(), fmt.Sprintf("%v.stdout", e.ctx.Task.Name),
			e.ctx.Task.LogConfig.MaxFiles, logFileSize, e.logger)
		if err != nil {
			return err
		}
		e.lro = lro
	}

	if e.lre == nil {
		lre, err := logging.NewFileRotator(e.ctx.AllocDir.LogDir(), fmt.Sprintf("%v.stderr", e.ctx.Task.Name),
			e.ctx.Task.LogConfig.MaxFiles, logFileSize, e.logger)
		if err != nil {
			return err
		}
		e.lre = lre
	}
	return nil
}
Esempio n. 2
0
// LaunchCmd launches a process and returns it's state. It also configures an
// applies isolation on certain platforms.
func (e *UniversalExecutor) LaunchCmd(command *ExecCommand, ctx *ExecutorContext) (*ProcessState, error) {
	e.logger.Printf("[DEBUG] executor: launching command %v %v", command.Cmd, strings.Join(command.Args, " "))

	e.ctx = ctx

	// configuring the task dir
	if err := e.configureTaskDir(); err != nil {
		return nil, err
	}

	// configuring the chroot, cgroup and enters the plugin process in the
	// chroot
	if err := e.configureIsolation(); err != nil {
		return nil, err
	}

	// setting the user of the process
	if e.ctx.UnprivilegedUser {
		if err := e.runAs("nobody"); err != nil {
			return nil, err
		}
	}

	logFileSize := int64(ctx.LogConfig.MaxFileSizeMB * 1024 * 1024)
	lro, err := logging.NewFileRotator(ctx.AllocDir.LogDir(), fmt.Sprintf("%v.stdout", ctx.TaskName),
		ctx.LogConfig.MaxFiles, logFileSize, e.logger)

	if err != nil {
		return nil, fmt.Errorf("error creating log rotator for stdout of task %v", err)
	}
	e.cmd.Stdout = lro
	e.lro = lro

	lre, err := logging.NewFileRotator(ctx.AllocDir.LogDir(), fmt.Sprintf("%v.stderr", ctx.TaskName),
		ctx.LogConfig.MaxFiles, logFileSize, e.logger)
	if err != nil {
		return nil, fmt.Errorf("error creating log rotator for stderr of task %v", err)
	}
	e.cmd.Stderr = lre
	e.lre = lre

	// setting the env, path and args for the command
	e.ctx.TaskEnv.Build()
	e.cmd.Env = ctx.TaskEnv.EnvList()
	e.cmd.Path = ctx.TaskEnv.ReplaceEnv(command.Cmd)
	e.cmd.Args = append([]string{e.cmd.Path}, ctx.TaskEnv.ParseAndReplace(command.Args)...)
	if filepath.Base(command.Cmd) == command.Cmd {
		if lp, err := exec.LookPath(command.Cmd); err != nil {
		} else {
			e.cmd.Path = lp
		}
	}

	// starting the process
	if err := e.cmd.Start(); err != nil {
		return nil, fmt.Errorf("error starting command: %v", err)
	}
	go e.wait()
	ic := &cstructs.IsolationConfig{Cgroup: e.groups}
	return &ProcessState{Pid: e.cmd.Process.Pid, ExitCode: -1, IsolationConfig: ic, Time: time.Now()}, nil
}