HP XC System Software Release Notes for Version 3.1

7 System Administration and Management
This chapter contains notes about system administration and management commands and tasks.
7.1 Multiple %EXPR% Expressions Are Not Accepted In the nagios_vars.ini
File
The nagios_vars.ini file is intended for site specific customizations. Problems occur if you
modify the entries in this file to contain more than one %EXPR% variable. For example, the
following entry causes the Nagios plug-in(s) that use this information to fail to report the correct
status.
loadave_warning =
%EXPR(%LDAVEWARN%+5)%,%EXPR(%LDAVEWARN%+4)%,%EXPR(%LDAVEWARN%+4)%,10
Instead of using the previous syntax, use simple numbers as shown in the following example:
loadave_warning = 11,10,10,10
7.2 The collectl Utility Does Not Correctly Handle the Change to Daylight
Savings Time
When the time changes to daylight savings time (DST), the collectl utility stops rolling its
log files. As a result, all data is written to the current log, and the log grows uncontrolled in size.
To work around this issue, restart the collectl service on all nodes on which it is currently
running:
# service collectl restart
7.3 Perform a Dry Run Before Using the si_updateclient Utility to Update
Nodes
The si_updateclient utility can leave nodes in an unbootable state in certain situations. You
can still use si_updateclient to deploy image changes to nodes. However, before you update
any nodes, HP recommends that you perform a dry run first to ensure that files in the /boot
directory are not updated. Updating files in /boot can result in nodes being unable to boot.
You can retieve a list of files that will be updated by si_updateclient by specifying
--dry-run on the command line.
7.4 NAT Server Aliases Continue to Run When the Number of NAT Servers
Are Reduced
This release note applies only if the HP XC system is configured with improved availability of
services.
If the NAT service is configured with improved availability and you reconfigure the system with
a reduced number of NAT servers, NAT aliases are left running on the nodes that no longer
provide the NAT server role. For example, if you remove the NAT server role from the nodes in
the availability set containing the head node, the old NAT aliases continue to run on the head
node.
A work around for this problem is to manually delete the alias files in the
/etc/sysconfig/network-scripts directory and stop the aliases before issuing the
transfer_to_avail command, as shown in the following procedure:
1. Stop the internal NAT server alias on the head node:
# ifconfig ethx:intn down
2. Stop the external NAT server alias on the head node:
7.1 Multiple %EXPR% Expressions Are Not Accepted In the nagios_vars.ini File 55