一键搭建nagios监控系统之一 脚本篇

    最近接了个项目，要求帮客户的6台服务器做一个监控系统，主要就是监控 cpuload;cpu使用率;硬盘分区使用情况;ftp是否健康;http是否健康;内存使用率;ping值;正常连接数以及mysql健康的监控. 而且要做到警告时，检测失败时以及恢复时要发送邮件到客户邮箱进行报警。(本来想是用飞信的，客户是电信189用户，不支持飞信，将邮件发送到189邮箱，然后邮箱邮件会自动发送到手机。) 基于这样的需求，决定来搭建一个nagios监控系统。可是正在准备着手搭建的时候，完了，时间长了忘记了怎么去搭建及配置了。有点杯具了。不过经过半天的摸索，终于上道了，花点时间搭建好了。也交差了。不过后来想想，始终靠记忆去记东西，靠不住啊。 决定把nagios服务器及客户端的配置，写到一个脚本里。只要在服务端和客户端执行 这个脚本，选择相应的操作，就能自动的将nagios监控系统完整的搭建完成。以后只要拿着这个脚本在手，就再不也怕啥"难够死"了。

经过一段时间的编写，这个脚本终于面试了。

1，脚本内容如下：

#! /bin/bash
##################  nagios server configure ########################
installserver() {
read -p " Please input the alarm  email address : " email
read -p " Please input the login nagios user: " loginuser
read -p " Please input the login nagios pass: " loginpass

echo  "###############  Install nagios server #################"
yum -y install httpd php php-gd php-xml php-mbstring php-ldap php-pear php-xmlrpc httpd-manual mod_ssl mod_perl  zlib libpng  freetype  libart_lgpl libart_lgpl-devel libxml*   pango*

wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.2.3.tar.gz
useradd nagios -s /sbin/nologin
tar -xvf  nagios-3.2.3.tar.gz
cd nagios-3.2.3
./configure --prefix=/usr/local/nagios
make all
make install
make install-init
make install-config
make install-commandmode
make install-webconf
cd  ..

wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz
tar -xvf  nagios-plugins-1.4.15.tar.gz
cd nagios-plugins-1.4.15
./configure
make
make install
cd ..

wget http://nchc.dl.sourceforge.net/sourceforge/nagios/nrpe-2.12.tar.gz
tar -xvf  nrpe-2.12.tar.gz
cd nrpe-2.12
./configure
make all
make install
make install-plugin
make install-daemon
make install-daemon-config
cd ..

wget http://oss.oetiker.ch/rrdtool/pub/rrdtool-1.4.7.tar.gz
tar -xvf  rrdtool-1.4.7.tar.gz
cd rrdtool-1.4.7
./configure --prefix=/usr/local/rrdtool/ &&make &&make install
cd ..

wget http://pkgs.fedoraproject.org/repo/pkgs/pnp4nagios/pnp-0.4.12.tar.gz/eb833a4769a5b58aad0ac53cae3e3e9f/pnp-0.4.12.tar.gz
tar -xvf  pnp-0.4.12.tar.gz
cd pnp-0.4.12
./configure --with-nagios-user=nagios --with-nagios-group-nagios --with-rrdtool=/usr/local/rrdtool/bin/rrdtool
make
make all
make install
make install-config
make install-init
cd ..

wget http://218.6.16.170/somenagios.tar
tar -xvf somenagios.tar -C /usr/local/nagios/libexec/

echo  "################install nagios server  completed#############"

echo "################# configure nagios server start###############"
htpasswd -bc /usr/local/nagios/etc/htpasswd.users  $loginuser $loginpass

# cgi.cfg configure#
sed -i "s#use_authentication=1#use_authentication=0#g" /usr/local/nagios/etc/cgi.cfg

#nagios.cfg configure#
sed -i '35i\cfg_file=/usr/local/nagios/etc/objects/hosts.cfg' /usr/local/nagios/etc/nagios.cfg
sed -i '35i\cfg_file=/usr/local/nagios/etc/objects/services.cfg' /usr/local/nagios/etc/nagios.cfg
sed -i '35i\cfg_file=/usr/local/nagios/etc/objects/hostgroup.cfg' /usr/local/nagios/etc/nagios.cfg
sed -i "s#cfg_file=/usr/local/nagios/etc/objects/localhost.cfg#\#cfg_file=/usr/local/nagios/etc/objects/localhost.cfg#g"  /usr/local/nagios/etc/nagios.cfg
sed -i "s#process_performance_data=0#process_performance_data=1#g" /usr/local/nagios/etc/nagios.cfg
sed -i "s/#host_perfdata_command=process-host-perfdata/host_perfdata_command=process-host-perfdata/g" /usr/local/nagios/etc/nagios.cfg
sed -i "s/#service_perfdata_command=process-service-perfdata/service_perfdata_command=process-service-perfdata/g" /usr/local/nagios/etc/nagios.cfg

#command.cfg configure#

line1=`sed -n '/process-host-perfdata$/=' /usr/local/nagios/etc/objects/commands.cfg`
line2=`sed -n '/process-service-perfdata$/=' /usr/local/nagios/etc/objects/commands.cfg`

sed -i "$(($line1+1))"d /usr/local/nagios/etc/objects/commands.cfg
sed -i "$(($line1+1))i\        command_line /usr/local/nagios/libexec/process_perfdata.pl"  /usr/local/nagios/etc/objects/commands.cfg
sed -i "$(($line2+1))"d /usr/local/nagios/etc/objects/commands.cfg
sed -i "$(($line2+1))i\        command_line /usr/local/nagios/libexec/process_perfdata.pl"  /usr/local/nagios/etc/objects/commands.cfg

echo '
define command{
        command_name    check_nrpe
        command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -t 30
        }

define command {
       command_name  check_mysql
       command_line    $USER1$/check_mysql -H $HOSTADDRESS$ -unagdb -pnagdb -d nagdb

       }
'>>/usr/local/nagios/etc/objects/commands.cfg

#templates.cfg configure#

echo '
define host {
        name       hosts-pnp
        register   0
        action_url /nagios/pnp/index.php?host=$HOSTNAME$
        process_perf_data               1

}
define service {
        name       services-pnp
        register   0
        action_url /nagios/pnp/index.php?host=$HOSTNAME$&srv=$SERVICEDESC$
        process_perf_data               1

}'>>/usr/local/nagios/etc/objects/templates.cfg

#pnp configure#

cp  /usr/local/nagios/etc/pnp/process_perfdata.cfg-sample  /usr/local/nagios/etc/pnp/process_perfdata.cfg
cp  /usr/local/nagios/etc/pnp/npcd.cfg-sample  /usr/local/nagios/etc/pnp/npcd.cfg
cp  /usr/local/nagios/etc/pnp/rra.cfg-sample  /usr/local/nagios/etc/pnp/rra.cfg
chown -R nagios:nagios  /usr/local/nagios/etc/pnp/*

sed -i 's#LOG_LEVEL = 0#LOG_LEVEL = 2#g'  /usr/local/nagios/etc/pnp/process_perfdata.cfg

#contacts.cfg configure#

sed -i  "s#nagios@localhost#$email#g" /usr/local/nagios/etc/objects/contacts.cfg
clear

echo "################### nagios server install and  configure completed,plase add hosts and services  then start it ##################"

}

restartnagios(){
    echo "stopping ......"
    service nagios stop
    killall -9 nrpe
    service httpd stop
    echo "starting ......"
    service nagios start
    /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
    service httpd start
}
addservices(){

read -p "please input the alias name : "  host
read -p "please input the clint ip : "  ip
echo "define host {
       host_name                 $host
        use            linux-server,hosts-pnp
       alias                      nagios server
       address                   $ip
       contact_groups             admins
       check_command              check-host-alive
       max_check_attempts         5
       notification_interval      10
       notification_period        24x7
       notification_options        d,u,r
       }" >> /usr/local/nagios/etc/objects/hosts.cfg


echo "define hostgroup {
        hostgroup_name myserver
        alias          myserver
        members        $host
}" >>/usr/local/nagios/etc/objects/hostgroup.cfg

echo "define service {
        host_name     $host
        use local-service,services-pnp
        service_description   CPU
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 1
        retry_check_interval 1
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command    check_nrpe!check_cpu
       }
define service {
        host_name     $host
        use local-service,services-pnp
        service_description   CPU_load
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 1
        retry_check_interval 1
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command    check_nrpe!check_load
       }
define service {
        host_name     $host
        use local-service,services-pnp
        service_description   HTTP
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 1
        retry_check_interval 1
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command    check_nrpe!check_http
       }
define service {
        host_name     $host
        use local-service,services-pnp
        service_description   MEMORY
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 1
        retry_check_interval 1
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command    check_nrpe!check_mem
       }
define service {
        host_name     $host
        service_description   connect-count
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 1
        retry_check_interval 1
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command    check_nrpe!check_ips
       }
define service {
        host_name     $host
        service_description   DISK
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 1
        retry_check_interval 1
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command    check_nrpe!check_disk
       }
define service {
        host_name     $host
        service_description   mysql
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 1
        retry_check_interval 1
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command   check_mysql
       }
define service {
        host_name     $host
        service_description   PING
        use local-service,services-pnp
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 1
        retry_check_interval 1
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command    check_ping!100.0,20%!500.0,60%
       }
define service {
        host_name     $host
        use local-service,services-pnp
        service_description  FTP
        check_period          24x7
        max_check_attempts    4
        normal_check_interval 60
        retry_check_interval 10
        contact_groups        admins
        notification_interval   10
        notification_period     24x7
        notification_options    w,u,c,r
        check_command    check_nrpe!check_ftp
       }

" >>/usr/local/nagios/etc/objects/services.cfg
echo "###############  Add services completed ########"
}
######################### nagios  configure  completed ########################

####################### client  server configure ########################

clientnagios() {

### install soft###
read -p "Please input the nagios server ip : " nagiosip

read -p "Please input the mysql password : " mysqlpass

useradd nagios
yum -y install zlib libpng  freetype  libart_lgpl libart_lgpl-devel libxml*   pango*

wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz
tar -xvf  nagios-plugins-1.4.15.tar.gz
cd nagios-plugins-1.4.15
./configure
make
make install
cd ..

wget http://nchc.dl.sourceforge.net/sourceforge/nagios/nrpe-2.12.tar.gz
tar -xvf  nrpe-2.12.tar.gz
cd nrpe-2.12
./configure
make all
make install
make install-plugin
make install-daemon
make install-daemon-config
cd ..

wget http://218.6.16.170/somenagios.tar
tar -xvf somenagios.tar -C /usr/local/nagios/libexec/
### install completed ###
### configure ####

rm /usr/local/nagios/etc/nrpe.cfg

cat >>/usr/local/nagios/etc/nrpe.cfg<<EOF
log_facility=daemon
pid_file=/var/run/nrpe.pid
server_port=5666
nrpe_user=nagios
nrpe_group=nagios
allowed_hosts=$nagiosip
dont_blame_nrpe=1
debug=1
command_timeout=30
connection_timeout=300
command[check_http]=/usr/local/nagios/libexec/check_http -H  -u 127.0.0.1 /index.php -t 60
command[check_disk]=/usr/local/nagios/libexec/check_disk -w 15% -c 10% -A -i '/dev/shm'
command[check_cpu]=/usr/local/nagios/libexec/check_cpu.sh
command[check_mem]=/usr/local/nagios/libexec/check_mem.sh
command[check_ips]=/usr/local/nagios/libexec/ip_conn.sh  400 600
command[check_load]=/usr/local/nagios/libexec/check_load -w 14,12,10 -c 18,15,12
command[check_ftp]=/usr/local/nagios/libexec/check_ftp 127.0.0.1 -w 10 -c 60
EOF

mysql -uroot -p"$mysqlpass" <<EOF
create database nagdb;
grant all on nagdb.* to nagdb@"$nagiosip" identified by 'nagdb';
flush privileges;
\q
EOF

killall -9 nrpe
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

############ configure completed ############

}

real=`grep -l '\^H' /root/.bash_profile`
if [ $? -eq 1 ];then
echo  'stty erase ^H' >> /root/.bash_profile
source /root/.bash_profile
fi
echo -e '\033[0;33;1m #################nagios################## \033[0m'
echo "nagios server install and configure or addserver          please input : 1"
echo "  clint server install or configure                       please input : 2"
echo "      exit                                                please input : 3"
echo -e '\033[0;33;1m ######################################### \033[0m'

read -p "please chose : " frist

if [ $frist -eq 1 ];then

echo -e '\033[0;33;1m #################nagios################## \033[0m'
echo "nagios server install and configue                    please input : 1"
echo "  Add server and services                             please input : 2"
echo "      exit                                            please input : 3"
echo -e '\033[0;33;1m ######################################### \033[0m'
read -p "please chose : " nagiosfrist
    if [ $nagiosfrist -eq 1 ];then
                    installserver
                    addservices
                    restartnagios
    elif [ $nagiosfrist -eq 2 ];then
                    addservices
                    restartnagios
    elif [  $nagiosfrist -eq 3 ];then
                    clear
                    exit
    else
                    echo "plase chose [1|2|3]"
    fi

elif [ $frist -eq 2 ];then
clientnagios

elif [ $frist -eq 3 ];then
clear
exit
else
echo "plase chose [1|2|3]"
fi

由于字数有限，脚本解释将在另一篇博客《一键搭建nagios监控系统之二 脚本解释篇》中讲解

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