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Node IP address change

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For managed nodes, the hostname or IP address change can be performed using the opc_node_change.pl script located in the /opt/OV/bin/OpC/utils directory on the management server.

Before changing the IP address or host name of one or more managed nodes in the HPOM database, opc_node_change.pl verifies that the new IP address and host name can be resolved on the management server and that they are not already used by other managed nodes. The tool also verifies that all management server processes including the database processes are running. On the managed node, opc_node_change.plensures that the new IP address is configured with the HPOM agent software. If the host name has changed, all currently assigned policies are redistributed. 

# /opt/OV/bin/OpC/utils/opc_node_change.pl -help
usage: opc_node_change.pl [-h[elp]] -oldname OLD_FQDN -oldaddr OLD_IP_ADDR -newname 
NEW_FQDN -newaddr NEW_IP_ADDR[,NEW_IP_ADDR,...] [-nnmupdate -netmask 999.999.999.999 
-macaddr XX:XX:XX:XX:XX:XX [-hook CMDNAME] [-nnmtopofix]]

See also: HP Operations Manager Administrator’s Reference

But what can be done if the script fails? For example, the following errors might be retrieved:

!!ERROR: New hostname 'a.b.c.com' and new 
	IP address(es) '10.20.30.40' do not match -- cannot modify node a.b.c.com!
!!ERROR: Node a.b.c.com (IP Addr 10.20.30.40) 
	is not a managed node name -- cannot modify node a.b.c.com!

This article describes a way to get debug output from the opc_node_change.pl perl script.

Solution

opc_node_change.pl's logfile is opc_node_change.log which is located in /var/opt/OV/share/log. But this does only contain the errors which are printed to the shell prompt anyway.

To get verbose and debug output, edit /opt/OV/bin/OpC/utils/opc_node_change.pl and change the following variables in package main:

package main; 
	my $opt_verbose = 0; 
	my $opt_debug = 0;

to 

package main; 
	my $opt_verbose = 1; 
	my $opt_debug = 1;

Save and rerun opc_node_change.pl.

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Last modified: March 12, 2019