While installing and configuring Oracle Cluster you need to configure RSH Server (Quite outdated but still oracle requires it). Today in this post I will explain how you can configure RSH on nodes which are going to be clustered.
1) Installation of RSH:-
You can install RSH using YUM or RPM package manager.
For YUM execute following command from Shell (as root)
For RPM:-
Download rsh-server RPM from Repository OR mount your RHEL DVD and go to RPM’s Directory and execute following command:-
2) Enable RSH Service.
By default RSH service is disabled to enable it open and Edit /etc/xinetd.d/rsh and /etc/xinetd.d/rlogin ; find term “disable”. Change “yes” to “no”. Make sure that both the files looks like following
# default: on
# description: The rshd server is the server for the rcmd(3) routine and,
# consequently, for the rsh(1) program. The server provides
# remote execution facilities with authentication based on
# privileged port numbers from trusted hosts.
service shell
{
socket_type = stream
wait = no
user = root
log_on_success += USERID
log_on_failure += USERID
server = /usr/sbin/in.rshd
disable = no
}
_
# default: on
# description: rlogind is the server for the rlogin(1) program. The server
# provides a remote login facility with authentication based on
# privileged port numbers from trusted hosts.
service login
{
socket_type = stream
wait = no
user = root
log_on_success += USERID
log_on_failure += USERID
server = /usr/sbin/in.rlogind
disable = no
}
3) Restart the Service on all node’s.
Restart xinetd service on all clustered nodes and also make sure to enable it on reboot. These operations can be done using following commands.
chkconfig rsh on
chkconfig rlogin on
4) Without Password logins
For Oracle Cluster setup its important that you should able to login into any other node without entering passwords. In SSH you can do that by setting SSH Keys but in RSH all you have to create /etc/hosts.equiv and insert all the Nodes in that. Following are the commands
chmod 600 /etc/hosts.equiv
chown root:root /etc/hosts.equiv
Then allow oracle user to connect servers without password. Insert following in /etc/hosts.equiv file
+rac2 oracle
+pvt1 oracle
+pvt2 oracle
Here, rac1, rac2, pvt1 and pvt2 are the servers in cluster (rac is public IP and pvt is private IP).
Thats it, now try to connect servers using command “rlogin [serverip]“.
About Milind Koyande
Milind Koyande is the Senior Research Engineer and his job is to work with new technologies, specially Cloud Computing / Virtualization Technology. His past projects include Government Sector initiatives, Backup and Disaster Recovery Solutions.
Milind Koyande is the Senior Research Engineer and his job is to work with new technologies, specially Cloud Computing / Virtualization Technology. His past projects include Government Sector initiatives, Backup and Disaster Recovery Solutions. Follow him on 
Tweets that mention How to Configure RSH for Oracle Cluster | -- Topsy.com
on Sep 10th, 2010
@ 9:43 pm:
[...] This post was mentioned on Twitter by eITWebguru, eITWebguru. eITWebguru said: How to Configure RSH for Oracle Cluster http://goo.gl/fb/xKOcZ [...]
Twitter Tweets about ORAC as of December 17, 2011
on Mar 20th, 2012
@ 1:46 am:
[...] 2011-12-16 00:47:14 · Reply · View TwitterDoodle by The Chocolate Truth VirtualWorldLyn: Hurry & Score a Deal On this Xe Healthy Energy Drink 3 Pack! Try it $7.95 shipped….follow">http://t.co/DHMoAbiZ #free 2011-12-17 14:34:10 · Reply · View Holleyzlm: Life [...]