def enable()

in VMExtension/hpcnodemanager.py [0:0]

• 25 lines of code
• 9 McCabe index (conditional complexity)

def enable():
    #Always restart daemon and clear PID file
    hutil = parse_context('Enable')
    if os.path.isfile(DaemonPidFilePath):
        pid = waagent.GetFileContents(DaemonPidFilePath)
        if os.path.isdir(os.path.join("/proc", pid)) and _is_nodemanager_daemon(pid):
            waagent.Log("Stop old daemon: {0}".format(pid))
            os.killpg(int(pid), 9)
        os.remove(DaemonPidFilePath)

    args = [get_python_executor(), os.path.join(os.getcwd(), __file__), "daemon"]
    devnull = open(os.devnull, 'w')
    child = subprocess.Popen(args, stdout=devnull, stderr=devnull, preexec_fn=os.setsid)
    if child.pid is None or child.pid < 1:
        hutil.do_exit(1, 'Enable', 'error', '1',
                      'Failed to launch HPC Linux node manager daemon')
    else:
        hutil.save_seq()
        waagent.SetFileContents(DaemonPidFilePath, str(child.pid))
        #Sleep 3 seconds to check if the process is still running
        time.sleep(3)
        if child.poll() is None:
            waagent.Log("Daemon pid: {0}".format(child.pid))
            hutil.do_exit(0, 'Enable', 'success', '0',
                      'HPC Linux node manager daemon is enabled')
        else:
            hutil.do_exit(1, 'Enable', 'error', '2',
                      'Failed to launch HPC Linux node manager daemon')