调整数据库磁盘报警阀值为99%报警
1,#ssh 10.21.100.13
2,#cd /usr/local/nagios/libexec
3,#vim check_disk
#! /bin/bash
if [ $# -ne 6 ]
then
echo "Usage:$0 -w num1 -c num2 -p 挂载目录"
exit 3
fi
Total=`df -k | grep -w "$6" | awk ‘{print $2}‘`
TOTAL=`df -h | grep -w "$6" | awk ‘{print $2}‘`
Totalp=`expr $Total \* 1000`
PERCENT=`df -h | grep -w "$6" | awk ‘{print $5}‘ | awk -F% ‘{print $1}‘`
Used=`df -k | grep -w "$6" | awk ‘{print $3}‘`
USED=`df -h | grep -w "$6" | awk ‘{print $3}‘`
Usedp=`expr $Used \* 1000`
if [ $PERCENT -lt "$2" ];then
echo "OK - Used DISK: $USED ($PERCENT%)"
exit 0
elif [ $PERCENT -gt "$2" -a $PERCENT -lt "$4" ];then
echo "Warning - Used DISK: $USED ($PERCENT%)"
exit 1
elif [ $PERCENT -gt "$4" ];then
echo "Critical - Used DISK: $USED ($PERCENT%)"
exit 2
fi
exit 0
4,#cd /usr/local/nagios/etc
5,#vim nrpe.cfg
#############################################################################
# Sample NRPE Config File
# Written by: Ethan Galstad (nagios@nagios.org)
#
# 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
//nrpe服务的端口号是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.
#
# 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=127.0.0.1,10.21.200.14,172.21.200.14
# 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=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:
#
# nagiosALL=(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=0
# 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 6,5,4 -c 10,9,8
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
command[check_disk]=/usr/local/nagios/libexec/check_disk -w 90 -c 99 -p /
command[check_disk_sdb1]=/usr/local/nagios/libexec/check_disk -w 98 -c 99 -p /oracle
报警的时候会报两个命令的名称分别是check_disk和check_disk_sdb1
check_disk和check_disk_sdb1都用的是/usr/local/nagios/libexec/check_disk这个脚本做检测的。
-p /代表check_disk检测根目录
-p /oracle代表check_disk_sdb1检测的是/oracle目录
-w 90代表warning报警是磁盘使用90%时
-c 99 代表critical紧急报警是磁盘使用99%时
command[check_cpu]=/usr/local/nagios/libexec/check_cpu -w 99 -c 100
command[check_mem]=/usr/local/nagios/libexec/check_mem -w 99 -c 100
command[check_swap]=/usr/local/nagios/libexec/check_swap -w 30% -c 10%
command[check_1588num]=/usr/local/nagios/libexec/check_1588num
# 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_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 $ARG3$
6, #/usr/local/nagios/libexec/check_disk -w 90 -c 99 -p /
检测一下是否会报警。
7，#killall nrpe
杀掉nrpe这个服务，这时候netstat –lntp 会发现5666端口已不存在。
8，#/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d
启动nrpe服务，这时候netstat –lntp 会发现5666端口已存在。
9，把启动nrpe服务的命令写入开机自启动里面
#vim /etc/rc.local
#/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d
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