When you want to mount an NFS file system on a node of an HACMP cluster, there are a couple of items you need check, before it will work:
- Make sure the hostname and IP address of the HACMP node are resolvable and provide the correct output, by running:
# nslookup [hostname] # nslookup [ip-address]
- The next thing you will want to check on the NFS server, if the node names of your HACMP cluster nodes are correctly added to the /etc/exports file. If they are, run:
# exportfs -va
- The last, and tricky item you will want to check is, if a service IP label is defined as an IP alias on the same adapter as your nodes hostname, e.g.:
The example above shows you that the default gateway is defined on the en1 interface. The next command shows you where your Service IP label lives:# netstat -nr Routing tables Destination Gateway Flags Refs Use If Exp Groups Route Tree for Protocol Family 2 (Internet): default 10.251.14.1 UG 4 180100 en1 - - 10.251.14.0 10.251.14.50 UHSb 0 0 en1 - - 10.251.14.50 127.0.0.1 UGHS 3 791253 lo0 - -
As you can see, the Service IP label (in the example above called "serviceip") is defined on en1. In that case, for NFS to work, you also want to add the "serviceip" to the /etc/exports file on the NFS server and re-run "exportfs -va". And you should also make sure that hostname "serviceip" resolves to an IP address correctly (and of course the IP address resolves to the correct hostname) on both the NFS server and the client.# netstat -i Name Mtu Network Address Ipkts Ierrs Opkts en1 1500 link#2 0.2.55.d3.75.77 2587851 0 940024 en1 1500 10.251.14 node01 2587851 0 940024 en1 1500 10.251.20 serviceip 2587851 0 940024 lo0 16896 link#1 1912870 0 1914185 lo0 16896 127 loopback 1912870 0 1914185 lo0 16896 ::1 1912870 0 1914185
If you found this useful, here's more on the same topic(s) in our blog:
- Renaming disk devices
- HACMP auto-verification
- Creating a bootable AIX DVD
- Commands to create printer queues
- Storing core files in one location
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Interested in learning more?
Interested in learning more?