Product specifications

4–InfiniPath Cluster Setup and Administration
Host Environment Setup for MPI
4-26 IB6054601-00 H
S
The example in this section assumes the following:
 Both the cluster nodes and the front end system are running the openssh
package as distributed in current Linux systems.
 All cluster end users have accounts with the same account name on the
front end and on each node, by using Network Information Service (NIS) or
another means of distributing the password file.
 The front end used in this example is called ip-fe.
 Root or superuser access is required on ip-fe and on each node to
configure ssh.
 ssh, including the host’s key, has already been configured on the system
ip-fe. See the sshd and ssh-keygen man pages for more information.
To use shosts.equiv to configure ssg and sshd:
1. On the system ip-fe (the front end node), change the
/etc/ssh/ssh_config file to allow host-based authentication.
Specifically, this file must contain the following four lines, all set to yes. If the
lines are already there but commented out (with an initial #), remove the #.
RhostsAuthentication yes
RhostsRSAAuthentication yes
HostbasedAuthentication yes
EnableSSHKeysign yes
2. On each of the InfiniPath node systems, create or edit the file
/etc/ssh/shosts.equiv, adding the name of the front end system. Add
the line:
ip-fe
Change the file to mode 600 when you are finished editing.
3. On each of the InfiniPath node systems, create or edit the file
/etc/ssh/ssh_known_hosts. You will need to copy the contents of the
file /etc/ssh/ssh_host_dsa_key.pub from ip-fe to this file (as a
single line), and then edit that line to insert ip-fe ssh-dss at the
beginning of the line. This is very similar to the standard known_hosts file
for
ssh. An example line might look like this (displayed as multiple lines, but
a single line in the file):
ip-fe ssh-dss
AAzAB3NzaC1kc3MAAACBAPoyES6+Akk+z3RfCkEHCkmYuYzqL2+1nwo4LeTVW
pCD1QsvrYRmpsfwpzYLXiSJdZSA8hfePWmMfrkvAAk4ueN8L3ZT4QfCTwqvHV
vSctpibf8n
aUmzloovBndOX9TIHyP/Ljfzzep4wL17+5hr1AHXldzrmgeEKp6ect1wxAAAA
FQDR56dAKFA4WgAiRmUJailtLFp8swAAAIBB1yrhF5P0jO+vpSnZrvrHa0Ok+
Y9apeJp3sessee30NlqKbJqWj5DOoRejr2VfTxZROf8LKuOY8tD6I59I0vlcQ