[launchd-dev] LimitLoadToHosts doesn't work with RunAtLoad

5 Jun 2008

      Hi,

I have a cluster of mail servers, using Wackamole to ensure IP failover. I 
start wackamole at startup, since it requires to be available all the time. 
Actually, I require NetworkState to be true.

Each server has a different set of preferred IP addresses, so each requires 
a different wackamole configuration file. I'm maintaining the software 
using RADMIND, and the simplest thing to do is place all the files on all 
the servers. I had hoped that launchd's LimitLoadToHosts key would help me 
out here, so I created a plist file for each server.

The trouble is that adding the following key to the plist seems to stop the 
service loading at startup, although it lets me load the service from the 
command line. It works as expected on the other hosts, preventing loading 
at any time.

<key>LimitLoadToHosts</key>
<array>
		<string>snow.uscs.susx.ac.uk</string>
</array>

Is this a bug in launchd? Does it work with, for example, on demand 
services?

My full (working) plist is here:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" 
"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>EnvironmentVariables</key>
	<dict>
		<key>DYLD_LIBRARY_PATH</key>
		<string>/opt/local/lib</string>
	</dict>
	<key>KeepAlive</key>
	<dict>
		<key>NetworkState</key>
		<true/>
	</dict>
	<key>Label</key>
	<string>org.wackamole.snow</string>
	<key>ProgramArguments</key>
	<array>
		<string>/opt/local/sbin/wackamole</string>
		<string>-c</string>
		<string>/opt/local/etc/wackamole.snow.conf</string>
		<string>-d</string>
	</array>
	<key>RunAtLoad</key>
	<true/>
</dict>
</plist>

-- 
Ian Eiloart
IT Services, University of Sussex
x3148