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_diskcheck_disk_sdb1

check_diskcheck_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%

-c 99 代表critical紧急报警是磁盘使用99%

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