UPS setup

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Powering Amahi (Fedora 12/14) with APC Back-UPS and Network UPS Tools (NUT)

The software APC Back-UPS comes with does not work in Linux. Instead, you need to use NUT or apcupsd. Google will turn up evidence that both work, but NUT seems to be the preferred one.

The original instructions that this guidance is based on came from here and here. The former, by Peter Selinger, are closest to this case, but a lot of the work he had to do is now done for you out of the box. The latter are for a different UPS, but are also fresher.

NOTE: This will be a future Amahi Web Application. To use the web monitoring capability, see UPS Monitor.

First, do this as root user:

yum -y install nut nut-client

Next, you will need to configure four files in /etc/ups: ups.conf, upsd.users, hosts.conf, and upsmon.conf. They will look almost identical to Selinger's (password1 and password2 can be changed to anything):

vi /etc/ups/ups.conf

[apc]
        driver = usbhid-ups
        port = auto
        desc = "APC Back-UPS"

vi /etc/ups/upsd.users

[admin]
        password = password1
        actions = SET
        instcmds = ALL
[monuser]
        password = password2
        upsmon master

vi /etc/ups/hosts.conf

MONITOR apc@localhost "UPS on HDA"

vi /etc/ups/upsmon.conf

MONITOR apc@localhost 1 monuser password2 master
MINSUPPLIES 1
SHUTDOWNCMD "/sbin/shutdown -h +0"
POLLFREQ 5
POLLFREQALERT 5
HOSTSYNC 15
DEADTIME 15
POWERDOWNFLAG /etc/killpower
RBWARNTIME 43200
NOCOMMWARNTIME 300
FINALDELAY 5

The next step is to start the UPS service:

upsdrvctl start
service ups stop
service ups start

At this point, you should see something like this in your terminal:

Starting UPS driver controller:                            [  OK  ]
Starting upsd:                                             [  OK  ]
Starting UPS monitor (master):                             [  OK  ]

If you do not, it may be because upsdrvctl refuses to cooperate at first. A reboot will fix that problem. The final step is to make sure that the UPS services start when the server does. For that, the /etc/rc.local file must be edited as follows:

vi /etc/rc.local

echo "Starting UPS driver, daemon, and monitor."
/sbin/upsdrvctl start
/usr/sbin/upsd
/usr/sbin/upsmon