Reboot every night at 3 AM and kick off munki; See http://www.launchd.info/ for more details on launchdaemon

edu.ohio.oit.reboot_and_update_nightly.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>Label</key>
        <string>edu.ohio.oit.reboot_and_update_nightly</string>
        <key>ProgramArguments</key>
        <array>
            <string>/Library/Management/oit/reboot_and_update_nightly.sh</string>
        </array>
        <key>StartCalendarInterval</key>
        <dict>
        	<key>Hour</key>
        	<integer>3</integer>
        	<key>Minute</key>
        	<integer>0</integer>
        </dict>
</dict>
</plist>

reboot_and_update_nightly.sh

#!/bin/sh

# TODO: Is munki running?
# If so, exit
# If not, continue

/usr/bin/touch /Users/Shared/.com.googlecode.munki.checkandinstallatstartup
/sbin/reboot

edu.ohio.oit.reboot_and_update_nightly.plist should be in /Library/LaunchDaemons/

reboot_and_update_nightly.sh should be in /Library/Management/oit/