Red Hat ENTERPRISE LINUX 4 - ADMINISTRATION Manual

Also see for ENTERPRISE LINUX 4 - DEVELOPER TOOLS GUIDE: Installation guide Installation guide Tuning guide Installation guide Manual

Contents

Chapter 2. Before Configuring a Red Hat Cluster14-A INPUT -i 10.10.10.200 -m state --state NEW -m multiport -p tcp -s10.10.10.0/24 -d 10.10.10.0/24 --dports 40040,40042,41040 -j ACCEPTExample 2.7. Ports 40040, 40042, 41040: lock_gulmd-A INPUT -i 10.10.10.200 -m state --state NEW -m multiport -p tcp -s10.10.10.0/24 -d 10.10.10.0/24 --dports 41966,41967,41968,41969 -j ACCEPTExample 2.8. Ports 41966, 41967, 41968, 41969: rgmanager-A INPUT -i 10.10.10.200 -m state --state NEW -m multiport -p tcp -s10.10.10.0/24 -d 10.10.10.0/24 --dports 50006,50008,50009 -j ACCEPTExample 2.9. Ports 50006, 50008, 50009: ccsd (TCP)-A INPUT -i 10.10.10.200 -m state --state NEW -m multiport -p udp -s10.10.10.0/24 -d 10.10.10.0/24 --dports 50007 -j ACCEPTExample 2.10. Port 50007: ccsd (UDP)2.3. Configuring ACPI For Use with Integrated FenceDevicesIf your cluster uses integrated fence devices, you must configure ACPI (Advanced Configuration andPower Interface) to ensure immediate and complete fencing.NoteFor the most current information about integrated fence devices supported by Red HatCluster Suite, refer to http://www.redhat.com/cluster_suite/hardware/.If a cluster node is configured to be fenced by an integrated fence device, disable ACPI Soft-Off forthat node. Disabling ACPI Soft-Off allows an integrated fence device to turn off a node immediatelyand completely rather than attempting a clean shutdown (for example, shutdown -h now).Otherwise, if ACPI Soft-Off is enabled, an integrated fence device can take four or more seconds toturn off a node (refer to note that follows). In addition, if ACPI Soft-Off is enabled and a node panicsor freezes during shutdown, an integrated fence device may not be able to turn off the node. Underthose circumstances, fencing is delayed or unsuccessful. Consequently, when a node is fencedwith an integrated fence device and ACPI Soft-Off is enabled, a cluster recovers slowly or requiresadministrative intervention to recover.NoteThe amount of time required to fence a node depends on the integrated fence deviceused. Some integrated fence devices perform the equivalent of pressing and holding thepower button; therefore, the fence device turns off the node in four to five seconds. Otherintegrated fence devices perform the equivalent of pressing the power button momentarily,