Posts Tagged ‘script’

Configuring APCUPSD on Gentoo for APC SmartUPS Over Serial

Both of the Gentoo wiki links at the bottom of this article are more-or-less USB-oriented so here’s a quick start for Serial connections. I use a USB to serial adapter so my serial device is named /dev/ttyUSB0, yours may be different if you use a regular serial port (i.e. /dev/ttyS0).

Emerge apcupsd:

# emerge apcupsc

Calculating dependencies... done!
[ebuild  N     ] sys-power/apcupsd-3.14.8-r1  USE="cgi nls snmp usb -gnome" 

Be sure to include the snmp USE flag if you will be configuring any UPSes with a networked management card later.

Edit /etc/apcupsd/apcupsd.conf to reflect:

## apcupsd.conf v1.1 ##
# 
#  for apcupsd release 3.14.8 (16 January 2010) - gentoo
#
# "apcupsd" POSIX config file

#
# ========= General configuration parameters ============
#

# UPSNAME xxx
#   Use this to give your UPS a name in log files and such. This
#   is particulary useful if you have multiple UPSes. This does not
#   set the EEPROM. It should be 8 characters or less.
#UPSNAME

# UPSCABLE <cable>
#   Defines the type of cable connecting the UPS to your computer.
#
#   Possible generic choices for <cable> are:
#     simple, smart, ether, usb
#
#   Or a specific cable model number may be used:
#     940-0119A, 940-0127A, 940-0128A, 940-0020B,
#     940-0020C, 940-0023A, 940-0024B, 940-0024C,
#     940-1524C, 940-0024G, 940-0095A, 940-0095B,
#     940-0095C, M-04-02-2000
#
UPSCABLE smart

# To get apcupsd to work, in addition to defining the cable
# above, you must also define a UPSTYPE, which corresponds to
# the type of UPS you have (see the Description for more details).
# You must also specify a DEVICE, sometimes referred to as a port.
# For USB UPSes, please leave the DEVICE directive blank. For
# other UPS types, you must specify an appropriate port or address.
#
# UPSTYPE   DEVICE           Description
# apcsmart  /dev/tty**       Newer serial character device, appropriate for 
#                            SmartUPS models using a serial cable (not USB).
#
# usb       <BLANK>          Most new UPSes are USB. A blank DEVICE
#                            setting enables autodetection, which is
#                            the best choice for most installations.
#
# net       hostname:port    Network link to a master apcupsd through apcupsd's 
#                            Network Information Server. This is used if the
#                            UPS powering your computer is connected to a 
#                            different computer for monitoring.
#
# snmp      hostname:port:vendor:community
#                            SNMP network link to an SNMP-enabled UPS device.
#                            Hostname is the ip address or hostname of the UPS 
#                            on the network. Vendor can be can be "APC" or 
#                            "APC_NOTRAP". "APC_NOTRAP" will disable SNMP trap 
#                            catching; you usually want "APC". Port is usually 
#                            161. Community is usually "private".
#
# netsnmp   hostname:port:vendor:community
#                            OBSOLETE
#                            Same as SNMP above but requires use of the 
#                            net-snmp library. Unless you have a specific need
#                            for this old driver, you should use 'snmp' instead.
#
# dumb      /dev/tty**       Old serial character device for use with 
#                            simple-signaling UPSes.
#
# pcnet     ipaddr:username:passphrase
#                            PowerChute Network Shutdown protocol which can be 
#                            used as an alternative to SNMP with the AP9617 
#                            family of smart slot cards.ipaddr is the IP 
#                            address of the UPS mgmtcard. username and 
#                            passphrase are the credentials for which the card 
#                            has been configured.
#
UPSTYPE apcsmart
DEVICE /dev/ttyUSB0

# POLLTIME <int>
#   Interval (in seconds) at which apcupsd polls the UPS for status. This
#   setting applies both to directly-attached UPSes (UPSTYPE apcsmart, usb, 
#   dumb) and networked UPSes (UPSTYPE net, snmp). Lowering this setting
#   will improve apcupsd's responsiveness to certain events at the cost of
#   higher CPU utilization. The default of 60 is appropriate for most
#   situations.
#POLLTIME 60

# LOCKFILE <path to lockfile>
#   Path for device lock file. Not used on Win32.
LOCKFILE /var/lock

# SCRIPTDIR <path to script directory>
#   Directory in which apccontrol and event scripts are located.
SCRIPTDIR /etc/apcupsd

# PWRFAILDIR <path to powerfail directory>
#   Directory in which to write the powerfail flag file. This file
#   is created when apcupsd initiates a system shutdown and is
#   checked in the OS halt scripts to determine if a killpower
#   (turning off UPS output power) is required.
PWRFAILDIR /etc/apcupsd

# NOLOGINDIR <path to nologin directory>
#   Directory in which to write the nologin file. The existence
#   of this flag file tells the OS to disallow new logins.
NOLOGINDIR /etc


#
# ======== Configuration parameters used during power failures ==========
#

# The ONBATTERYDELAY is the time in seconds from when a power failure
#   is detected until we react to it with an onbattery event.
#
#   This means that, apccontrol will be called with the powerout argument
#   immediately when a power failure is detected.  However, the
#   onbattery argument is passed to apccontrol only after the 
#   ONBATTERYDELAY time.  If you don't want to be annoyed by short
#   powerfailures, make sure that apccontrol powerout does nothing
#   i.e. comment out the wall.
ONBATTERYDELAY 6

# 
# Note: BATTERYLEVEL, MINUTES, and TIMEOUT work in conjunction, so
# the first that occurs will cause the initation of a shutdown.
#

# If during a power failure, the remaining battery percentage
# (as reported by the UPS) is below or equal to BATTERYLEVEL, 
# apcupsd will initiate a system shutdown.
BATTERYLEVEL 2

# If during a power failure, the remaining runtime in minutes 
# (as calculated internally by the UPS) is below or equal to MINUTES,
# apcupsd, will initiate a system shutdown.
MINUTES 3

# If during a power failure, the UPS has run on batteries for TIMEOUT
# many seconds or longer, apcupsd will initiate a system shutdown.
# A value of 0 disables this timer.
#
#  Note, if you have a Smart UPS, you will most likely want to disable
#    this timer by setting it to zero. That way, you UPS will continue
#    on batteries until either the % charge remaing drops to or below BATTERYLEVEL,
#    or the remaining battery runtime drops to or below MINUTES.  Of course,
#    if you are testing, setting this to 60 causes a quick system shutdown
#    if you pull the power plug.   
#  If you have an older dumb UPS, you will want to set this to less than
#    the time you know you can run on batteries.
TIMEOUT 0

#  Time in seconds between annoying users to signoff prior to
#  system shutdown. 0 disables.
ANNOY 300

# Initial delay after power failure before warning users to get
# off the system.
ANNOYDELAY 60

# The condition which determines when users are prevented from
# logging in during a power failure.
# NOLOGON <string> [ disable | timeout | percent | minutes | always ]
NOLOGON disable

# If KILLDELAY is non-zero, apcupsd will continue running after a
# shutdown has been requested, and after the specified time in
# seconds attempt to kill the power. This is for use on systems
# where apcupsd cannot regain control after a shutdown.
# KILLDELAY <seconds>  0 disables
KILLDELAY 0

#
# ==== Configuration statements for Network Information Server ====
#

# NETSERVER [ on | off ] on enables, off disables the network
#  information server. If netstatus is on, a network information
#  server process will be started for serving the STATUS and
#  EVENT data over the network (used by CGI programs).
NETSERVER on

# NISIP <dotted notation ip address>
#  IP address on which NIS server will listen for incoming connections.
#  This is useful if your server is multi-homed (has more than one
#  network interface and IP address). Default value is 0.0.0.0 which
#  means any incoming request will be serviced. Alternatively, you can
#  configure this setting to any specific IP address of your server and 
#  NIS will listen for connections only on that interface. Use the
#  loopback address (127.0.0.1) to accept connections only from the
#  local machine.
NISIP 0.0.0.0

# NISPORT <port> default is 3551 as registered with the IANA
#  port to use for sending STATUS and EVENTS data over the network.
#  It is not used unless NETSERVER is on. If you change this port,
#  you will need to change the corresponding value in the cgi directory
#  and rebuild the cgi programs.
NISPORT 3551

# If you want the last few EVENTS to be available over the network
# by the network information server, you must define an EVENTSFILE.
EVENTSFILE /var/log/apcupsd.events

# EVENTSFILEMAX <kilobytes>
#  By default, the size of the EVENTSFILE will be not be allowed to exceed
#  10 kilobytes.  When the file grows beyond this limit, older EVENTS will
#  be removed from the beginning of the file (first in first out).  The
#  parameter EVENTSFILEMAX can be set to a different kilobyte value, or set
#  to zero to allow the EVENTSFILE to grow without limit.
EVENTSFILEMAX 10

#
# ========== Configuration statements used if sharing =============
#            a UPS with more than one machine

#
# Remaining items are for ShareUPS (APC expansion card) ONLY
#

# UPSCLASS [ standalone | shareslave | sharemaster ]
#   Normally standalone unless you share an UPS using an APC ShareUPS
#   card.
UPSCLASS standalone

# UPSMODE [ disable | share ]
#   Normally disable unless you share an UPS using an APC ShareUPS card.
UPSMODE disable

#
# ===== Configuration statements to control apcupsd system logging ========
#

# Time interval in seconds between writing the STATUS file; 0 disables
STATTIME 0

# Location of STATUS file (written to only if STATTIME is non-zero)
STATFILE /var/log/apcupsd.status

# LOGSTATS [ on | off ] on enables, off disables
# Note! This generates a lot of output, so if         
#       you turn this on, be sure that the
#       file defined in syslog.conf for LOG_NOTICE is a named pipe.
#  You probably do not want this on.
LOGSTATS off

# Time interval in seconds between writing the DATA records to
#   the log file. 0 disables.
DATATIME 0

# FACILITY defines the logging facility (class) for logging to syslog. 
#          If not specified, it defaults to "daemon". This is useful 
#          if you want to separate the data logged by apcupsd from other
#          programs.
#FACILITY DAEMON

#
# ========== Configuration statements used in updating the UPS EPROM =========
#

#
# These statements are used only by apctest when choosing "Set EEPROM with conf
# file values" from the EEPROM menu. THESE STATEMENTS HAVE NO EFFECT ON APCUPSD.
#

# UPS name, max 8 characters 
#UPSNAME UPS_IDEN

# Battery date - 8 characters
#BATTDATE mm/dd/yy

# Sensitivity to line voltage quality (H cause faster transfer to batteries)  
# SENSITIVITY H M L        (default = H)
#SENSITIVITY H

# UPS delay after power return (seconds)
# WAKEUP 000 060 180 300   (default = 0)
#WAKEUP 60

# UPS Grace period after request to power off (seconds)
# SLEEP 020 180 300 600    (default = 20)
#SLEEP 180

# Low line voltage causing transfer to batteries
# The permitted values depend on your model as defined by last letter 
#  of FIRMWARE or APCMODEL. Some representative values are:
#    D 106 103 100 097
#    M 177 172 168 182
#    A 092 090 088 086
#    I 208 204 200 196     (default = 0 => not valid)
#LOTRANSFER  208

# High line voltage causing transfer to batteries
# The permitted values depend on your model as defined by last letter 
#  of FIRMWARE or APCMODEL. Some representative values are:
#    D 127 130 133 136
#    M 229 234 239 224
#    A 108 110 112 114
#    I 253 257 261 265     (default = 0 => not valid)
#HITRANSFER 253

# Battery charge needed to restore power
# RETURNCHARGE 00 15 50 90 (default = 15)
#RETURNCHARGE 15

# Alarm delay 
# 0 = zero delay after pwr fail, T = power fail + 30 sec, L = low battery, N = never
# BEEPSTATE 0 T L N        (default = 0)
#BEEPSTATE T

# Low battery warning delay in minutes
# LOWBATT 02 05 07 10      (default = 02)
#LOWBATT 2

# UPS Output voltage when running on batteries
# The permitted values depend on your model as defined by last letter 
#  of FIRMWARE or APCMODEL. Some representative values are:
#    D 115
#    M 208
#    A 100
#    I 230 240 220 225     (default = 0 => not valid)
#OUTPUTVOLTS 230

# Self test interval in hours 336=2 weeks, 168=1 week, ON=at power on
# SELFTEST 336 168 ON OFF  (default = 336)
#SELFTEST 336

Start APCUPSD:

# /etc/init.d/apcupsd start

Add apcupsd to the default runlevel:

# rc-update add apcupsd default

If you want apcupsd to power off your UPS when it shuts down your system in a power failure, add apcupsd.powerfail to the shutdown runlevel:

# rc-update add apcupsd.powerfail shutdown

Verify you are able to communicate with the UPS with this configuration:

# apcaccess status
APC      : 001,051,1223
DATE     : 2012-08-14 21:19:08 -0400  
HOSTNAME : mdma
VERSION  : 3.14.8 (16 January 2010) gentoo
UPSNAME  : UPS_IDEN
CABLE    : Custom Cable Smart
MODEL    : SMART-UPS 1400 RM
UPSMODE  : Stand Alone
STARTTIME: 2012-08-14 21:16:51 -0400  
STATUS   : ONLINE 
LINEV    : 120.9 Volts
LOADPCT  :  40.5 Percent Load Capacity
BCHARGE  : 100.0 Percent
TIMELEFT :  10.0 Minutes
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME  : 0 Seconds
MAXLINEV : 120.9 Volts
MINLINEV : 119.6 Volts
OUTPUTV  : 120.2 Volts
SENSE    : High
DWAKE    : 000 Seconds
DSHUTD   : 020 Seconds
DLOWBATT : 02 Minutes
LOTRANS  : 103.0 Volts
HITRANS  : 132.0 Volts
RETPCT   : 000.0 Percent
ITEMP    : 43.6 C Internal
ALARMDEL : 5 seconds
BATTV    : 28.0 Volts
LINEFREQ : 60.0 Hz
LASTXFER : Automatic or explicit self test
NUMXFERS : 0
TONBATT  : 0 seconds
CUMONBATT: 0 seconds
XOFFBATT : N/A
SELFTEST : NO
STESTI   : 336
STATFLAG : 0x07000008 Status Flag
DIPSW    : 0x00 Dip Switch
REG1     : 0x00 Register 1
REG2     : 0x00 Register 2
REG3     : 0x00 Register 3
MANDATE  : 06/04/98
SERIALNO : XXXXXXXXXXXXX
BATTDATE : 10/19/07
NOMOUTV  : 115 Volts
NOMBATTV :  24.0 Volts
EXTBATTS : 0
FIRMWARE : 72.9.D
APCMODEL : KWD
END APC  : 2012-08-14 21:19:51 -0400

Now we’ll do a serious test; tail the log and unplug the UPS then plug it back in. You should see something like:

# tail -f /var/log/apcupsd.events 
2012-08-14 21:17:05 -0400  apcupsd 3.14.8 (16 January 2010) gentoo startup succeeded
2012-08-14 21:23:04 -0400  Power failure.
2012-08-14 21:23:10 -0400  Running on UPS batteries.

Broadcast message from root@mdma (Tue Aug 14 21:23:10 2012):

Power failure on UPS UPS_IDEN. Running on batteries.
2012-08-14 21:23:11 -0400  Mains returned. No longer on UPS batteries.
2012-08-14 21:23:11 -0400  Power is back. UPS running on mains.

Broadcast message from root@mdma (Tue Aug 14 21:23:12 2012):

Power has returned on UPS UPS_IDEN...

If you would like to be notified of events by e-mail edit the scripts in the /etc/apcupsd directory and change the SYSADMIN variable to your preferred e-mail address.

More Reading:

Installing NRPE for Nagios/Icinga on Gentoo

You have two options for monitoring things like load average and logged in users on a remote host with Nagios or Icinga: SNMP (which you are probably already using for Cacti or a similar graphing/monitoring solution) or the Nagios Remote Plugin Executor (NRPE). NRPE gives one greater flexibility in the kind of data collected and actions executed. Unfortunately, NRPE is not included in Portage so we must compile and configure it on our own.

First, download the NRPE source tarball to your core monitoring server and install check_nrpe:

# mkdir /usr/src/nrpe
# cd /usr/src/nrpe
# wget [tarball]
# tar xf [tarball]
# cd nrpe-[version]
# ./configure
# make all
# cp src/check_nrpe /usr/[lib|lib64]/nagios/plugins/

Now add the command to your Icinga or Nagios config:

define command{
        command_name check_nrpe
        command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}

Compile and install the nrpe server on the target host:

# mkdir /usr/src/nrpe
# cd /usr/src/nrpe
# wget [tarball]
# tar xf [tarball]
# cd nrpe-[version]
# ./configure
# make all
# mkdir /etc/nrpe
# cp src/nrpe /usr/bin/
# cp sample-config/nrpe.cfg /etc/nrpe/

Install the nagios-plugins package from portage:

# emerge nagios-plugins

Edit /etc/nrpe/nrpe.cfg with a mind to security (particularly the allowed_hosts directive). The nagios-plugins package has already created the nagios user and group so there is no need to change the defaults. Update the command paths at the end of the file to reflect the location nagios-plugins installed to:

command[check_users]=/usr/lib/nagios/plugins/check_users -w 5 -c 10
command[check_load]=/usr/lib/nagios/plugins/check_load -w 15,10,5 -c 30,25,20
command[check_root]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /dev/root
command[check_zombie_procs]=/usr/lib/nagios/plugins/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/lib/nagios/plugins/check_procs -w 150 -c 200

Start the server as root with the daemoniz flag:

# nrpe -c /etc/nrpe/nrpe.cfg -d

We can see it has dropped down to the nagios user:

# ps aux | grep nrpe
nagios     570  0.0  0.0   4208   948 ?        Ss   16:55   0:00 nrpe -c /etc/nrpe/nrpe.cfg -d

Now we can test the configuration on the Nagios/Icinga core monitoring server:

# /usr/lib64/nagios/plugins/check_nrpe -H [ADDRESS]
NRPE v2.13

If the remote NRPE server’s configuration is working it should respond with NRPE [version]. Now we can set up some services on the monitoring server:

define service{
        host_name               myhost
        service_description     Users
        check_command           check_nrpe!check_users
        max_check_attempts      5
        check_interval          5
        retry_interval          1
        check_period            24x7
        notification_interval   30
        notification_period     24x7
        notification_options    w,c,r
        contact_groups          admins
        }

Note that the argument for check_command is one of the hard-coded commands in the nrpe server’s configuration file. Restart Icinga/Nagios to load the changes and begin monitoring:

# /etc/init.d/icinga restart

An init script will be required to make the NRPE daemon start on boot, create /etc/init.d/nrpe:

#!/sbin/runscript
# Copyright (c) 2012 http://foxpa.ws
# All rights released

description="Runs Nagios Remote Plugin Executor on Gentoo"

depend()
{
        need net
}

start()
{
        ebegin "Starting NRPE"
        start-stop-daemon --start --quiet --user=root --background --exec "/usr/bin/nrpe" -- -c /etc/nrpe/nrpe.cfg -d
        eend ${?}
}

stop()
{
        ebegin "Stopping NRPE"
        start-stop-daemon --stop --quiet --pidfile "/var/run/nrpe.pid"
        eend ${?}
}

Now make it executable and add it to the default runlevel:

# chmod +x /etc/init.d/nrpe
# rc-update add nrpe default

Alternatively, NRPE can be run by xinetd. From the README:

Running Under INETD or XINETD
-----------------------------

If you plan on running nrpe under inetd or xinetd and making use
of TCP wrappers, you need to do the following things:



1) Add a line to your /etc/services file as follows (modify the port
   number as you see fit)

        nrpe            5666/tcp        # NRPE



2) Add entries for the NRPE daemon to either your inetd or xinetd
   configuration files.  Which one your use will depend on which
   superserver is installed on your system.  Both methods are described
   below.  NOTE: If you run nrpe under inetd or xinetd, the server_port
   and allowed_hosts variables in the nrpe configuration file are
   ignored.


   ***** INETD *****
   If your system uses the inetd superserver WITH tcpwrappers, add an
   entry to /etc/inetd.conf as follows:

        nrpe    stream  tcp     nowait  <user> /usr/sbin/tcpd <nrpebin> -c <nrpecfg> --inetd

   If your system uses the inetd superserver WITHOUT tcpwrappers, add an
   entry to /etc/inetd.conf as follows:

        nrpe    stream  tcp     nowait  <user> <nrpebin> -c <nrpecfg> --inetd


   - Replace <user> with the name of the user that the nrpe server should run as.
        Example: nagios
   - Replace <nrpebin> with the path to the nrpe binary on your system.
        Example: /usr/local/nagios/nrpe
   - Replace <nrpecfg> with the path to the nrpe config file on your system.
        Example: /usr/local/nagios/nrpe.cfg


   ***** XINETD *****
   If your system uses xinetd instead of inetd, you'll probably
   want to create a file called 'nrpe' in your /etc/xinetd.d
   directory that contains the following entries:


        # default: on
        # description: NRPE
        service nrpe
        {
                flags           = REUSE
                socket_type     = stream        
                wait            = no
                user            = <user>
                server          = <nrpebin>
                server_args     = -c <nrpecfg> --inetd
                log_on_failure  += USERID
                disable         = no
                only_from       = <ipaddress1> <ipaddress2> ...
        }


   - Replace <user> with the name of the user that the nrpe server should run as.
   - Replace <nrpebin> with the path to the nrpe binary on your system.
   - Replace <nrpecfg> with the path to the nrpe config file on your system.
   - Replace the <ipaddress> fields with the IP addresses of hosts which
     are allowed to connect to the NRPE daemon.  This only works if xinetd was
     compiled with support for tcpwrappers.



3) Restart inetd or xinetd will the following command (pick the
   on that is appropriate for your system:

        /etc/rc.d/init.d/inet restart

        /etc/rc.d/init.d/xinetd restart

   OpenBSD users can use the following command to restart inetd:

        kill -HUP `cat /var/run/inet.pid`



4) Add entries to your /etc/hosts.allow and /etc/hosts.deny
   file to enable TCP wrapper protection for the nrpe service.
   This is optional, although highly recommended.

ApacheBench Shows Lots of Failed Requests due to Length

Breathe easy. Smile. You’re probably here because you’ve just run ab and got output something like:

This is ApacheBench, Version 2.0.40-dev <$Revision: 1.146 $> apache-2.0
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright 2006 The Apache Software Foundation, http://www.apache.org/

Benchmarking **** (be patient)
Completed 100000 requests
Completed 200000 requests
Completed 300000 requests
Completed 400000 requests
Completed 500000 requests
Completed 600000 requests
Completed 700000 requests
Completed 800000 requests
Completed 900000 requests
Finished 1000000 requests


Server Software:        nginx/1.2.1
Server Hostname:        ****
Server Port:            80

Document Path:          ****
Document Length:        162 bytes

Concurrency Level:      5
Time taken for tests:   9502.884921 seconds
Complete requests:      1000000
Failed requests:        697730
   (Connect: 0, Length: 697730, Exceptions: 0)
Write errors:           0
Total transferred:      279019852 bytes
Total POSTed:           247000494
HTML transferred:       158019731 bytes
Requests per second:    105.23 [#/sec] (mean)
Time per request:       47.514 [ms] (mean)
Time per request:       9.503 [ms] (mean, across all concurrent requests)
Transfer rate:          28.67 [Kbytes/sec] received
                        25.38 kb/s sent
                        54.06 kb/s total

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0   15  26.7     13    3183
Processing:     0   31  18.8     29    2319
Waiting:        0   30  15.9     28    1719
Total:          0   46  38.9     42    4333

Percentage of the requests served within a certain time (ms)
  50%     42
  66%     45
  75%     46
  80%     47
  90%     51
  95%     55
  98%    104
  99%    201
 100%   4333 (longest request)

697730 out of 1 million requests failed? No, not really.

ApacheBench expects to be run against something that produces consistent output. Chances are you’ve specified a script that has dynamic output and the length of that output has changed since the first pull.

Let’s have a nice cup of tea :)

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