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Adding an uninterruptible power supply (UPS) to your Amahi server
== Powering Amahi (Fedora 12, Intel Atom D510MO) with APC Back-UPS ES 550 and [http://www.networkupstools.org/index.html NUT] ==
The APC Back-UPS ES 550 is a consumer-grade UPS: the software it comes with does not work in Linux. Instead, you need to use NUT or apcupsd. Google will turn up evidence that both work.
The original NUT instructions that this article is based on came from [http://www.mscs.dal.ca/~selinger/ups/backups.html here] and [http://billauer.co.il/blog/2010/01/fedora-mustek-powermust-600-ups-nut-howto/ 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.
First, do this:
{{Code|Code=
#yum -y install nut nut-client
}}
Next, you will need to configure three files in /etc/ups: ups.conf, upsd.users, and upsmon.conf. They will look almost identical to Selinger's:
{{Code|Code=
/usr/etc/ups.conf:
----------------------------------------------------------------------
[apc]
driver = usbhid-ups
port = auto
desc = "APC Back-UPS ES 550"
/usr/etc/upsd.users:
----------------------------------------------------------------------
[admin]
password = password1
actions = SET
instcmds = ALL
[monuser]
password = password2
upsmon master
/usr/etc/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:
{{Code|
# upsdrvctl start
# service ups stop
# service ups start
}}
At this point, you should see something like this in your terminal:
{{Code|
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:
{{Code|
echo "Starting UPS driver, daemon, and monitor."
/sbin/upsdrvctl start
/usr/sbin/upsd
/usr/sbin/upsmon
}}
The APC Back-UPS ES 550 is a consumer-grade UPS: the software it comes with does not work in Linux. Instead, you need to use NUT or apcupsd. Google will turn up evidence that both work.
The original NUT instructions that this article is based on came from [http://www.mscs.dal.ca/~selinger/ups/backups.html here] and [http://billauer.co.il/blog/2010/01/fedora-mustek-powermust-600-ups-nut-howto/ 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.
First, do this:
{{Code|Code=
#yum -y install nut nut-client
}}
Next, you will need to configure three files in /etc/ups: ups.conf, upsd.users, and upsmon.conf. They will look almost identical to Selinger's:
{{Code|Code=
/usr/etc/ups.conf:
----------------------------------------------------------------------
[apc]
driver = usbhid-ups
port = auto
desc = "APC Back-UPS ES 550"
/usr/etc/upsd.users:
----------------------------------------------------------------------
[admin]
password = password1
actions = SET
instcmds = ALL
[monuser]
password = password2
upsmon master
/usr/etc/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:
{{Code|
# upsdrvctl start
# service ups stop
# service ups start
}}
At this point, you should see something like this in your terminal:
{{Code|
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:
{{Code|
echo "Starting UPS driver, daemon, and monitor."
/sbin/upsdrvctl start
/usr/sbin/upsd
/usr/sbin/upsmon
}}
