SSH access for the Xeon Phi coprocessor

[Paola_A_]

Hi,

I've installed the last version of MPSS and I lost connectivity with the coprocessors. My steps to recover access were:

service mpss stop

micctrl --userupdate=none

micctrl --sshkeys=root mic0

micctrl --sshkeys=root mic1

service mpss start

But, when I try ssh mic0 is asking me for a password. If one of the steps didn't work, what log file could I check to find the error?

Thanks,

Paola

[Loc_N_Intel]

Have you tried to re-generate the SSH key:

# ssh-keygen

# service mpss stop
# micctrl --sshkeys=root mic0 
# service mpss start

[Rolly_N_]

Hi,

I would like to share my findings on the same issue.

I am trying to install MPSS 3.8.1 on Ubuntu 16.04 here, https://software.intel.com/en-us/forums/intel-many-integrated-core/topic/712607

If I ssh with root, it asks for password, even I have already done

sudo ssh-keygen

which returns,

Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
/root/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:wasXXXXXXXXXXXXXXXXXXXXXXXXXXXXX root@node09
The key's randomart image is:
+---[RSA 2048]----+
| XXXXX  |
+----[SHA256]-----+

Then I do,

qeuser@node09:~$ sudo micctrl --sshkeys=root mic0
qeuser@node09:~$ ssh root@mic0
root@mic0's password: 
Permission denied, please try again.
root@mic0's password: 

Since Ubuntu has no root access, I have to

sudo bash

Then, I tried again. Now, I can ssh to the Phi with

root@node09:~# ssh mic0
The authenticity of host 'mic0 (172.31.1.1)' can't be established.
ECDSA key fingerprint is SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'mic0,172.31.1.1' (ECDSA) to the list of known hosts.

[root@node09-mic0 ~]# uname -a
Linux node09-mic0 2.6.38.8+mpss3.8.1 #1 SMP Thu Jan 12 16:10:30 EST 2017 k1om GNU/Linux

I hope it helps.

Rolly