在AWS上使用starcluster和ipython进行集群计算

Question

我正在尝试在AWS上进行一些集群计算的实验。我在这方面完全是新手，并且有一些问题。我正在尝试遵循这里提供的教程：http://star.mit.edu/cluster/docs/latest/plugins/ipython.html#using-the-ipython-cluster。我使用starcluster启动一个集群实例，如下所示：

starcluster start mycluster

一切都按预期进行，并显示ipython插件已加载。然后，我尝试执行以下命令，如本教程所示：

starcluster sshmaster mycluster -u myuser

然而，连接失败了，并告诉我

Permission denied (publickey).

我可以使用以下工具登录

starcluster sshmaster mycluster

因此，我尝试继续本教程登录到主服务器，但当我尝试创建客户端时，我收到错误消息：

AssertionError: Not a valid connection file or url: 
u'/root/.ipython/profile_default/security/ipcontroller-client.json'

我看到的唯一不寻常的事情是，当集群启动时，它出现了：

>>> Running plugin ipcluster
>>> Writing IPython cluster config files
>>> Starting IPython cluster with 7 engines
>>> Waiting for JSON connector file... 
>>> Creating IPCluster cache directory: /Users/username/.starcluster/ipcluster
>>> Saving JSON connector file to '/Users/username/.starcluster/ipcluster/mycluster-us-east-1.json'
!!! ERROR - Error occurred while running plugin 'ipcluster':
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/StarCluster-0.93.3-py2.7.egg/starcluster/cluster.py", line 1506, in run_plugin
    func(*args)
  File "/Library/Python/2.7/site-packages/StarCluster-0.93.3-py2.7.egg/starcluster/plugins/ipcluster.py", line 276, in run
    plug.run(nodes, master, user, user_shell, volumes)
  File "<string>", line 2, in run
  File "/Library/Python/2.7/site-packages/StarCluster-0.93.3-py2.7.egg/starcluster/utils.py", line 87, in wrap_f
    res = func(*arg, **kargs)
  File "/Library/Python/2.7/site-packages/StarCluster-0.93.3-py2.7.egg/starcluster/plugins/ipcluster.py", line 228, in run
    cfile = self._start_cluster(master, n, profile_dir)
  File "/Library/Python/2.7/site-packages/StarCluster-0.93.3-py2.7.egg/starcluster/plugins/ipcluster.py", line 173, in _start_cluster
    master.ssh.get(json, local_json)
  File "/Library/Python/2.7/site-packages/StarCluster-0.93.3-py2.7.egg/starcluster/sshutils/__init__.py", line 431, in get
    self.scp.get(remotepaths, localpath, recursive=recursive)
  File "/Library/Python/2.7/site-packages/StarCluster-0.93.3-py2.7.egg/starcluster/sshutils/scp.py", line 141, in get
    self._recv_all()
  File "/Library/Python/2.7/site-packages/StarCluster-0.93.3-py2.7.egg/starcluster/sshutils/scp.py", line 242, in _recv_all
    msg = self.channel.recv(1024)
  File "build/bdist.macosx-10.8-intel/egg/ssh/channel.py", line 611, in recv
    raise socket.timeout()
timeout

有什么想法吗？

Answer 1

本教程假定在~/.starcluster/config中使用CLUSTER_USER = myuser，即使在缺省情况下为CLUSTER_USER = sgeadmin