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Check_disk errors
Posted: Tue Feb 26, 2019 5:30 am
by AnotherNagiosUser
I'm having problems monitoring the disk on a remote server.
This is the error message I'm getting.
check_disk: Could not parse arguments
Usage:
check_disk -w limit -c limit [-W limit] [-K limit] {-p path
Performance Data: -x device} [-C] [-E] [-e] [-f] [-g group ] [-k] [-l] [-M] [-m] [-R path ] [-r path ] [-t timeout] [-u unit] [-v] [-X type] [-N type] [-n
On the Nagios server the following is entered under nrpe.cfg
Code: Select all
command[check_disk]=/usr/local/nagios/libexec/check_disk $ARG1$
#command[check_users]=/usr/local/nagios/libexec/check_users -w $ARG1$ -c $ARG2$
#command[check_load]=/usr/local/nagios/libexec/check_load -w $ARG1$ -c $ARG2$
#command[check_disk]=/usr/local/nagios/libexec/check_disk $ARG1$
#command[check_procs]=/usr/local/nagios/libexec/check_procs -w $ARG1$ -c $ARG2$ -s $ARG3$
On the cfg file for the server I have the following
Code: Select all
define service{
use generic-service
host_name SERVER2
service_description Root Partition
check_command check_nrpe!check_disk!
}
On the remote server I have the following in the nrpe.cfg file
Code: Select all
command[check_disk]=/usr/local/nagios/libexec/check_disk $ARG1$
#command[check_users]=/usr/local/nagios/libexec/check_users -w $ARG1$ -c $ARG2$
#command[check_load]=/usr/local/nagios/libexec/check_load -w $ARG1$ -c $ARG2$
#command[check_disk]=/usr/local/nagios/libexec/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
#command[check_procs]=/usr/local/nagios/libexec/check_procs -w $ARG1$ -c $ARG2$ -s $ARG3$
And /etc/xinetd.d/nrpe on the remote server
Code: Select all
# default: on
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
flags = REUSE
socket_type = stream
port = 5666
wait = no
user = nagios
group = nagios
server = /usr/local/nagios/bin/nrpe
server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd
log_on_failure += USERID
disable = no
only_from = xx.x.x.x
}
When I execute this command on the Nagios server
Code: Select all
/usr/local/nagios/libexec/check_nrpe -H server2 -c check_disk -a '-w 85% -c 90% -p /'
I get the following
DISK CRITICAL - free space: / 3510 MB (12.81% inode=97%);| /=23888MB;4333;2888;0;28890
I can't figure out what is wrong here.It's probably something obvious I've forgotten to do!
Re: Check_disk errors
Posted: Tue Feb 26, 2019 1:48 pm
by scottwilkerson
This
Code: Select all
define service{
use generic-service
host_name SERVER2
service_description Root Partition
check_command check_nrpe!check_disk!
}
should be this
Code: Select all
define service{
use generic-service
host_name SERVER2
service_description Root Partition
check_command check_nrpe!check_disk! -a '-w 85% -c 90% -p /'
}
Re: Check_disk errors
Posted: Wed Feb 27, 2019 5:46 am
by AnotherNagiosUser
Thanks. I've updated the cfg file for the server, and I'm still getting the same error message.
Re: Check_disk errors
Posted: Wed Feb 27, 2019 8:16 am
by scottwilkerson
in your nrpe.cfg is this set?
It needs to be if you are going to pass the arguments the the command.
Then restart NRPE
Re: Check_disk errors
Posted: Wed Feb 27, 2019 9:18 am
by AnotherNagiosUser
On the remote server dont_blame_nrpe was set to 1
It wasn't on the Nagios server, so I changed that, but it's not made a difference.
Tried restarting nagios, and restarting nrpe on the remote server.
Re: Check_disk errors
Posted: Wed Feb 27, 2019 9:27 am
by scottwilkerson
lets check to make sure check_disk isn't specifies multiple times on the remote server
Code: Select all
grep check_disk /usr/local/nagios/etc/nrpe.cfg
grep check_disk -R /usr/local/nagios/etc/nrpe/
Re: Check_disk errors
Posted: Wed Feb 27, 2019 9:57 am
by AnotherNagiosUser
On the remote server
Code: Select all
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1
command[check_disk]=/usr/local/nagios/libexec/check_disk $ARG1$
#command[check_disk]=/usr/local/nagios/libexec/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
Code: Select all
grep check_disk -R /usr/local/nagios/etc/nrpe/
grep: /usr/local/nagios/etc/nrpe/: No such file or directory
The only thing in /usr/local/nagios/etc/ on the remote server is the nrpe.cfg file
Re: Check_disk errors
Posted: Thu Feb 28, 2019 4:06 am
by AnotherNagiosUser
I'm using xinet.d so the command should be this I think.
Code: Select all
grep check_disk -R /etc/xinetd.d/nrpe
Which brings back nothing
Re: Check_disk errors
Posted: Thu Feb 28, 2019 10:49 am
by scottwilkerson
Can you share your whole /usr/local/nagios/etc/nrpe.cfg ?
Re: Check_disk errors
Posted: Fri Mar 01, 2019 4:20 am
by AnotherNagiosUser
Here is the nrpe.cfg file from the remote server.
Code: Select all
#############################################################################
# Sample NRPE Config File
# Written by: Ethan Galstad ([email protected])
#
# Last Modified: 11-23-2007
#
# NOTES:
# This is a sample configuration file for the NRPE daemon. It needs to be
# located on the remote host that is running the NRPE daemon, not the host
# from which the check_nrpe client is being executed.
#############################################################################
# LOG FACILITY
# The syslog facility that should be used for logging purposes.
log_facility=daemon
# PID FILE
# The name of the file in which the NRPE daemon should write it's process ID
# number. The file is only written if the NRPE daemon is started by the root
# user and is running in standalone mode.
pid_file=/var/run/nrpe.pid
# PORT NUMBER
# Port number we should wait for connections on.
# NOTE: This must be a non-priviledged port (i.e. > 1024).
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd
server_port=5666
# SERVER ADDRESS
# Address that nrpe should bind to in case there are more than one interface
# and you do not want nrpe to bind on all interfaces.
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd
#server_address=127.0.0.1
# NRPE USER
# This determines the effective user that the NRPE daemon should run as.
# You can either supply a username or a UID.
#
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd
nrpe_user=nagios
# NRPE GROUP
# This determines the effective group that the NRPE daemon should run as.
# You can either supply a group name or a GID.
#
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd
nrpe_group=nagios
# ALLOWED HOST ADDRESSES
# This is an optional comma-delimited list of IP address or hostnames
# that are allowed to talk to the NRPE daemon. Network addresses with a bit mask
# (i.e. 192.168.1.0/24) are also supported. Hostname wildcards are not currently
# supported.
#
# Note: The daemon only does rudimentary checking of the client's IP
# address. I would highly recommend adding entries in your /etc/hosts.allow
# file to allow only the specified host to connect to the port
# you are running this daemon on.
#
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd
allowed_hosts=127.0.0.1,xx.x.x.xx
# COMMAND ARGUMENT PROCESSING
# This option determines whether or not the NRPE daemon will allow clients
# to specify arguments to commands that are executed. This option only works
# if the daemon was configured with the --enable-command-args configure script
# option.
#
# *** ENABLING THIS OPTION IS A SECURITY RISK! ***
# Read the SECURITY file for information on some of the security implications
# of enabling this variable.
#
# Values: 0=do not allow arguments, 1=allow command arguments
dont_blame_nrpe=1
# BASH COMMAND SUBTITUTION
# This option determines whether or not the NRPE daemon will allow clients
# to specify arguments that contain bash command substitutions of the form
# $(...). This option only works if the daemon was configured with both
# the --enable-command-args and --enable-bash-command-substitution configure
# script options.
#
# *** ENABLING THIS OPTION IS A HIGH SECURITY RISK! ***
# Read the SECURITY file for information on some of the security implications
# of enabling this variable.
#
# Values: 0=do not allow bash command substitutions,
# 1=allow bash command substitutions
allow_bash_command_substitution=0
# COMMAND PREFIX
# This option allows you to prefix all commands with a user-defined string.
# A space is automatically added between the specified prefix string and the
# command line from the command definition.
#
# *** THIS EXAMPLE MAY POSE A POTENTIAL SECURITY RISK, SO USE WITH CAUTION! ***
# Usage scenario:
# Execute restricted commmands using sudo. For this to work, you need to add
# the nagios user to your /etc/sudoers. An example entry for alllowing
# execution of the plugins from might be:
#
# nagios ALL=(ALL) NOPASSWD: /usr/lib/nagios/plugins/
#
# This lets the nagios user run all commands in that directory (and only them)
# without asking for a password. If you do this, make sure you don't give
# random users write access to that directory or its contents!
# command_prefix=/usr/bin/sudo
# DEBUGGING OPTION
# This option determines whether or not debugging messages are logged to the
# syslog facility.
# Values: 0=debugging off, 1=debugging on
debug=1
# COMMAND TIMEOUT
# This specifies the maximum number of seconds that the NRPE daemon will
# allow plugins to finish executing before killing them off.
command_timeout=60
# CONNECTION TIMEOUT
# This specifies the maximum number of seconds that the NRPE daemon will
# wait for a connection to be established before exiting. This is sometimes
# seen where a network problem stops the SSL being established even though
# all network sessions are connected. This causes the nrpe daemons to
# accumulate, eating system resources. Do not set this too low.
connection_timeout=300
# WEEK RANDOM SEED OPTION
# This directive allows you to use SSL even if your system does not have
# a /dev/random or /dev/urandom (on purpose or because the necessary patches
# were not applied). The random number generator will be seeded from a file
# which is either a file pointed to by the environment valiable $RANDFILE
# or $HOME/.rnd. If neither exists, the pseudo random number generator will
# be initialized and a warning will be issued.
# Values: 0=only seed from /dev/[u]random, 1=also seed from weak randomness
#allow_weak_random_seed=1
# INCLUDE CONFIG FILE
# This directive allows you to include definitions from an external config file.
#include=<somefile.cfg>
# INCLUDE CONFIG DIRECTORY
# This directive allows you to include definitions from config files (with a
# .cfg extension) in one or more directories (with recursion).
#include_dir=<somedirectory>
#include_dir=<someotherdirectory>
# COMMAND DEFINITIONS
# Command definitions that this daemon will run. Definitions
# are in the following format:
#
# command[<command_name>]=<command_line>
#
# When the daemon receives a request to return the results of <command_name>
# it will execute the command specified by the <command_line> argument.
#
# Unlike Nagios, the command line cannot contain macros - it must be
# typed exactly as it should be executed.
#
# Note: Any plugins that are used in the command lines must reside
# on the machine that this daemon is running on! The examples below
# assume that you have plugins installed in a /usr/local/nagios/libexec
# directory. Also note that you will have to modify the definitions below
# to match the argument format the plugins expect. Remember, these are
# examples only!
# The following examples use hardcoded command arguments...
command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
# The following examples allow user-supplied arguments and can
# only be used if the NRPE daemon was compiled with support for
# command arguments *AND* the dont_blame_nrpe directive in this
# config file is set to '1'. This poses a potential security risk, so
# make sure you read the SECURITY file before doing this.
command[check_disk]=/usr/local/nagios/libexec/check_disk $ARG1$
#command[check_users]=/usr/local/nagios/libexec/check_users -w $ARG1$ -c $ARG2$
#command[check_load]=/usr/local/nagios/libexec/check_load -w $ARG1$ -c $ARG2$
#command[check_disk]=/usr/local/nagios/libexec/check_disk -w $ARG1$ -c $ARG2$ -p $ARG3$
#command[check_procs]=/usr/local/nagios/libexec/check_procs -w $ARG1$ -c $ARG2$ -s $ARG3$