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I have two apcupsd.conf files (this is for a 2 UPS setup, easily expandable to N):
[adk0212@mail apcupsd]$ ls -l /etc/apcupsd/*.conf
-rw-r--r-- 1 root root 11799 Aug 3 08:39 /etc/apcupsd/apcupsd.ups0.conf
-rw-r--r-- 1 root root 11822 Aug 25 14:31 /etc/apcupsd/apcupsd.ups1.conf
In my case, ups0 is the UPS powering the UPS server running the multiple apcupsd instances, so only
ups0 should initiate a shutdown of the local machine. The differences between the confs are minor since
both UPSes are USB (although that is not a requirement; mixing cable types works fine too):
[adk0212@mail apcupsd]$ diff -u apcupsd.ups0.conf apcupsd.ups1.conf
--- apcupsd.ups0.conf 2007-08-03 08:39:26.000000000 -0400
+++ apcupsd.ups1.conf 2007-08-25 14:31:17.000000000 -0400
-UPSNAME ups0
+UPSNAME ups1
-DEVICE /dev/ups0
+DEVICE /dev/ups1
-SCRIPTDIR /etc/apcupsd
+SCRIPTDIR /etc/apcupsd/null
-PWRFAILDIR /etc/apcupsd
+PWRFAILDIR /etc/apcupsd/null
-NOLOGINDIR /etc
+NOLOGINDIR /etc/apcupsd/null
-ANNOY 300
+ANNOY 0
-NISPORT 3551
+NISPORT 3552
-EVENTSFILE /var/log/apcupsd.events
+EVENTSFILE /var/log/apcupsd.2.events
The important difference to note is that ups1 has its SCRIPTDIR, PWRFAILDIR, and NOLOGINDIR set to
a special "null" directory that I have created. This directory contains a copy of the event handling scripts
modified to avoid shutting down the local machine. (Details below). Also the UPSes are given different
EVENTSFILE and NISPORT settings. Plus I disable the "annoy" feature on ups1. Since the state of that
UPS does not impact local users, there's no reason to annoy them.
I have the following files in the special "null" directory:
[adk0212@mail apcupsd]$ ls -l /etc/apcupsd/null
total 32
-rwxr--r-- 1 root root 4176 Aug 3 08:24 apccontrol
-rwxr-xr-x 1 root root 475 Aug 3 08:28 changeme
-rwxr-xr-x 1 root root 502 Aug 3 08:28 commfailure
-rwxr-xr-x 1 root root 503 Aug 3 08:28 commok
-rwxr--r-- 1 root root 8 Aug 3 08:22 doshutdown
-rwxr-xr-x 1 root root 470 Aug 3 08:27 offbattery
-rwxr-xr-x 1 root root 435 Aug 3 08:27 onbattery
The important change here is the addition of a 'doshutdown' script which overrides apccontrol's shutdown
action:
[adk0212@mail null]$ cat /etc/apcupsd/null/doshutdown
exit 99
The "exit 99" tells apccontrol to skip its normal processing for that event. apccontrol itself is unchanged; it
is a direct copy of the original. The other scripts are also direct copies and have simply been modified to
- APCUPSD User Manual 1
- Important Legal Disclaimer 6
- How To Use This Manual 7
- Basic User's Guide 7
- Supported Operating Systems 8
- Supported UPSes and Cables 9
- Choosing a Configuration Type 10
- Configuration types 10
- USB Configuration 12
- BSD USB Configuration 16
- Windows USB Configuration 18
- Solaris USB Configuration 18
- Installation from Source 20
- Configure Options 23
- Compilers and Options 26
- Operating System Specifics 26
- After Installation 30
- Configuration Examples 32
- MODBUS Driver 35
- Testing Apcupsd 36
- Communications Test 38
- Simulated Power Fail Test 39
- System Shutdown Test 40
- Full Power Down Test 40
- Security Issues: 48
- Configuring Your EEPROM 48
- Battery Technology 48
- Battery Life 49
- Battery Replacement 50
- Battery Installation 51
- Frequently-Asked Questions 55
- Customizing Event Handling 57
- Multiple UPS Example 59
- Support for SNMP UPSes 62
- Building with SNMP support 65
- SNMP Trap Catching 66
- Known Problems 66
- Logging Types 66
- Implementation Details 67
- Installing Apcupsd on Windows 68
- Starting Apcupsd on Windows 69
- Testing Apcupsd on Windows 70
- Upgrading 70
- Post-Installation 70
- Problem Areas 70
- Email Notification of Events 71
- Killpower under Windows 71
- Power Down During Shutdown 71
- Testing Serial-Line UPSes 73
- Voltage Signalling 78
- Analyses of APC Cables 79
- Recalibrating the UPS Runtime 86
- Status report format 93
- Status Report Example 93
- Status Report Fields 94
- Shutdown Sequence 97
- Shutdown Problems 99
- Master/Slave Shutdown 99
- APC smart protocol 100
- Dip switch info 106
- Status bits 106
- Alert messages 106
- Register 1 107
- Register 2 107
- Register 3 108
- EEPROM Values 109
- Programming the UPS EEPROM 110
- NIS Network Server Protocol 111
- Apcupsd RPM Packaging FAQ 111
- Contributors 113
- Apcupsd License 114
- Other Open Source Licenses 114
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