Installation guide

For gnbd:
iptables -I INPUT -p tcp -m state --state NEW -m multiport --dports 14567 -j ACCEPT
For luci:
iptables -I INPUT -p tcp -m state --state NEW -m multiport --dports 8084 -j ACCEPT
For DLM:
iptables -I INPUT -p tcp -m state --state NEW -m multiport --dports 21064 -j ACCEPT
For ccsd:
iptables -I INPUT -p udp -m state --state NEW -m multiport --dports 50007 -j ACCEPT
iptables -I INPUT -p tcp -m state --state NEW -m multiport --dports 50008 -j ACCEPT
After executing these commands, run the following command.
service iptables save ; service iptables restart
In Red Hat Enterprise Linux 5, rgmanager does not access the network directly; rgmanager
communication happens by means of openais network transport. Enabling openais allows
rgmanager (or any openais clients) to work automatically.
2.11. Considerat ions for Using Conga
When using Co n g a to configure and manage your Red Hat Cluster, make sure that each computer
running lu ci (the Co n g a user interface server) is running on the same network that the cluster is
using for cluster communication. Otherwise, lu ci cannot configure the nodes to communicate on the
right network. If the computer running lu ci is on another network (for example, a public network
rather than a private network that the cluster is communicating on), contact an authorized Red Hat
support representative to make sure that the appropriate host name is configured for each cluster
node.
2.12. Configuring Virt ual Machines in a Clust ered Environment
When you configure your cluster with virtual machine resources, you should use the rgmanager
tools to start and stop the virtual machines. Using xm or virsh to start the machine can result in the
virtual machine running in more than one place, which can cause data corruption in the virtual
machine.
To reduce the chances of administrators accidentally " double-starting" virtual machines by using
both cluster and non-cluster tools in a clustered environment, you can configure your system as
follows:
Ensure that you are using the rgmanager 2.0.52-1.el5_4.3 or later package release.
Store the virtual machine configuration files in a non-default location.
Storing the virtual machine configuration files somewhere other than their default location makes it
more difficult to accidentally start a virtual machine using xm or virsh, as the configuration file will
be unknown out of the box to libvirt or the xm tool.
Red Hat Ent erprise Linux 5 Clust er Administ rat ion
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