R和雪在亚马逊EC2使用starcluster

Question

我正在尝试在AWS EC2集群上以R并行运行分析。 我正在使用starcluster来设置和管理EC2集群，并尝试在R中使用snow和foreach 。首先，我在集群中有2个节点，1个master和1个worker。

starcluster start mycluster 
starcluster listinstances

-----------------------------------------
mycluster (security group: @sc-mycluster)
-----------------------------------------
....
Cluster nodes:
     master running i-xxxxxxxxx masterIP.compute-1.amazonaws.com
    node001 running i-xxxxxxxxx node001IP.compute-1.amazonaws.com
Total nodes: 2

starcluster sshmaster mycluster

然后我启动R并加载snow包并尝试创建一个集群对象。

R
library("snow")

cl = makeCluster(c("masterIP.compute-1.amazonaws.com", "node001IP.compute-1.amazonaws.com"), type = "SOCK")

但是，这会给我以下错误消息：

The authenticity of host 'masterIP.compute-1.amazonaws.com (xx.xxx.xx.xx)' can't be established.
ECDSA key fingerprint is xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'masterIP.compute-1.amazonaws.com,xx.xxx.xx.xx' (ECDSA) to the list of known hosts.
Permission denied (publickey).

所以我尝试将我的ssh密钥（ keyname.rsa具体）复制到EC2上的.ssh文件中并再次尝试。 那还是行不通; 我收到了相同的Permission denied (publickey). 错误。 我认为starcluster处理节点之间的ssh和通信的设置，所以我有点困惑为什么我无法设置它。 我也尝试添加node001，所以cl = makeCluster(c("node001IP.compute-1.amazonaws.com"), type = "SOCK") ，但是发生了同样的错误。

Answer 1

事实证明，经过多次修补后，所需要的只是R版本2.15的更新。 命令cl = makeCluster(c("masterIP.compute-1.amazonaws.com", "node001IP.compute-1.amazonaws.com"), type = "SOCK")之后完美运行。