nagios监控系统安装(2)
6、设置监控报警
需要调整的文件包括：
/usr/local/nagios/etc/objects/contacts.cfg
/usr/local/nagios/etc/objects/commands.cfg
a./usr/local/nagios/etc/objects/contacts.cfg
这里面是联系人、分组的信息，简单配置contact项目如下：
define contact{
contact_name nagiosadmin
use generic-contact
service_notification_period 24x7
host_notification_period 24x7
service_notification_options w,u,c,r
host_notification_options d,u,r
alias Nagios Admin
service_notification_commands notify-service-by-email,notify-service-by-sms
host_notification_commands notify-host-by-email,notify-host-by-sms
email wulujia@gmail.com ; «***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
}
b./usr/local/nagios/etc/objects/commands.cfg
这里配置了各种plugins的用法、命令等，可以好好看看这份文件，在其中做的事情包括了，定义发sms和通过邮件发报警信息，其中sms信息的细节建议参见《libfetion短信通知与nagios整合》：
#host notify by sms
define command {
command_name notify-host-by-sms
command_line /usr/local/fetion/sms.sh “Host $HOSTSTATE$ alert for $HOSTNAME$! on ‘$DATETIME$’">/dev/null 2>&1
}
#service notify by sms
define command {
command_name notify-service-by-sms
command_line /usr/local/fetion/sms.sh “$HOSTADDRESS$ $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$">/dev/null 2>&1
}
’notify-host-by-email’ command definition#
define command{
command_name notify-host-by-email
command_line /usr/local/nagios/bin/mail_send.sh “** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ ” “*** N
agios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPU
T$\n\nDate/Time: $LONGDATETIME$\n” $CONTACTEMAIL$
}
’notify-service-by-email’ command definition#
define command{
command_name notify-service-by-email
command_line /usr/local/nagios/bin/mail_send.sh “** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVI
CESTATE$ ” “*** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HO
STADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$” $CONTACTEMAIL$
}
顺便提一句：如果要检查非标准端口（比如，ftp开在了22222端口上），也是修改commands.cfg文件，对check_ftp的声明修改增加-p参数即可。
‘check_ftp’ command definition#
define command{
command_name check_ftp
command_line $USER1$/check_ftp -H $HOSTADDRESS$ -p $ARG1$
}
再把test.cfg中，对应服务的检测命令后面加一个端口号的参数：
define service {
host_name …
…
check_command check_ftp!22222
}
这就可以对22222端口的FTP进行监控，要添加多个参数，也可以如法炮制。
其中用到的脚本mail_send.sh如下：
#!/bin/bash
cd /usr/local/nagios/bin
if [ $# -ne 4 ]; then
Subject="$1”
AlertInfo="$2”
Touser="$3"
/usr/bin/python /usr/local/nagios/bin/mail_send.py “$Subject” “$AlertInfo” “$Touser”
fi
EOF :mail_send.sh#
用到的mail_send.py脚本如下：
below is the mail_send.py#
mail_send.py#
-- coding: utf-8 --#
import sys,os,re,glob,sys
import os.path
import smtplib
import time,datetime
import base64
import random
import email
import mimetypes
from email.MIMEMultipart import MIMEMultipart
from email.MIMEText import MIMEText
from email.MIMEImage import MIMEImage
#from email import Encoders
#from email import Message
#os.sys.path.append(’/webapp/_conf/nagios/’)
#from nagios_conf import visit
#################################################################
## vspMail ##
## 参数列表 ##
## smtp_server 发邮件smtp服务器地址 ##
## from_usr 发件人地址 ##
## to_usr 收件人地址 ##
## subject 邮件标题 ##
## htmlText 邮件内容 ##
## auth 是否需要认证，1为是，0为否 ##
## log_usr smtp用户名 ##
## log_passwd smtp密码 ##
## ##
#################################################################
def nagiosMail(smtp_server,from_usr,to_usr,subject,plainText,htmlText,auth,log_usr,log_passwd):
server = smtplib.SMTP(smtp_server)
#server.set_debuglevel(1)
if auth == 1:
server.login(log_usr,log_passwd)
strFrom = from_usr
strTo = to_usr
subject="=?GB2312?B?%s?=" % (base64.encodestring(subject)[:-1])
# msgRoot = MIMEMultipart(‘related’)
msgRoot = MIMEMultipart(‘alternative’)
msgRoot[‘Subject’] = subject
msgRoot[‘From’] = strFrom
msgRoot[‘To’] = strTo
msgRoot.preamble = ‘This is a multi-part message in MIME format.’
msgAlternative = MIMEMultipart(‘alternative’)
msgAlternative.attach(msgAlternative)
#设定纯文本信息
msgText = MIMEText(plainText, ‘plain’, ‘gbk’)
msgAlternative.attach(msgText) # 隐藏文本
# msgRoot.attach(msgText)
#设定HTML信息
msgText = MIMEText(htmlText, ‘html’, ‘gbk’)
msgRoot.attach(msgText)
#设定内置图片信息,可以考虑作为取日志的附件的方法
# fp = open(’test.jpg’, ‘rb’)
# msgImage = MIMEImage(fp.read())
# fp.close()
# msgImage.add_header(‘Content-ID’, ‘’)
# msgRoot.attach(msgImage)
server.sendmail(strFrom, strTo, msgRoot.as_string())
server.quit()
class Logger(object):
def init(self):
from time import strftime
pid = os.getpid()
logtime=strftime(’%Y%m%d’)
self.logfile = ‘/var/log/nagios/nagios-%s.log’ % logtime
def write(self, err):
logline = ‘%s|%s\n’ % (time.asctime(), err)
f = file(self.logfile, ‘a’)
f.write(logline)
f.close()
#class mailsend(object,subject,htmlText):
def mailsend(*arguments):
logger = Logger()
subject=arguments[0]
htmlText=arguments[1]
plainText=arguments[1]
touser=arguments[2]
#print subject
#print htmlText
#print plainText
#return True
#flist=visit()
######################################################
##
## 以下为配置内容
##
######################################################
#邮件发送服务器地址
smtp_server = ’localhost’
#smtp_server = ‘smtp.163.com’
#smtp_server = ‘abc.com’
#smtp_server = ‘192.168.0.220’
#发一封歇息多久
delay = 3
#smtp服务器是否需要验证
#需要验证为1不需要为0
auth = 0
#如果需要验证，请在下面输入用户名和密码
log_usr=“abcdef”
log_passwd=“123456”
#发件人地址
from_usr = ’nagios@abc.com’
try:
tousr=touser.split(",")
for to_usr in tousr:
print to_usr
nagiosMail(smtp_server,from_usr,to_usr,subject,plainText, htmlText,auth,log_usr,log_passwd)
logger.write(‘‘‘Email has been sent to: %s \n’’’ % (to_usr))
time.sleep(delay)
logger.write(’’’……The all logs for nagios has been Finished!!!\n’’’)
except IOError:
logger.write(“Can not open list file please place it in current directory and name it as ‘addr-xxx.txt’\n”)
if name == ‘main’:
logger = Logger()
argv = sys.argv
subject=argv[1]
htmlText=argv[2]
touser=argv[3]
#subject="**RECOVERY alert - 192.168.0.233/Partition_Webapp is OK **"
#htmlText="***** Nagios *****\n\nNotification Type:RECOVERY\n\nService: Partition_Webapp\nHost:192.168.0.233\nAddress: 192.168.0.233\nState:OK\n\nDate/Time: Mon Jul 30 18:24:59 CST 2007\n\nAdditionalInfo:\n\nDISK OK - free space: /webapp 757 MB (54% inode=70%):"
print argv
try:
mailsend(subject,htmlText,touser)
except:
logger.write(’execution failure:’ + str(sys.exc_info()[0]))
raise
测试：/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
启动nagios配置文件：/etc/init.d/nagios start
7、登陆web访问：http://server/nagios/
输入在nagios.pw中定义的用户名和密码登陆，就可以看到对test服务器的监控情况了，如果停止其中的某个服务，会在检测4次失败后，短消息和邮件通知。
8、如果需要服务器使用mysql进行数据存储，需要安装NDOUtils
./configure –enable-mysql
make
Mysql中建立库、用户，并赋予权限：
mysqladmin -uroot -p create nagios
mysql -uroot -p
mysql> grant all privileges on nagios.* to m1@localhost identified by ‘xfocusisbest’;
mysql> flush privileges;
导入库：
cd db
./installdb –u user –p password –h localhost –d database
拷贝编译完成的文件：
cp src/ndomod-3x.o /usr/local/nagios/bin/ndomod.o
cp config/ndomod.cfg /usr/local/nagios/etc/
调整/usr/local/nagios/etc/nagios.cfg
broker_module=/usr/local/nagios/bin/ndomod.o config_file=/usr/local/nagios/etc/ndomod.cfg
event_broker_options=-1
安装NDO2DB DAEMON
cp src/ndo2db-3x /usr/local/nagios/bin/ndo2db
cp config/ndo2db.cfg /usr/local/nagios/etc/
运行ndo2db，并将之加入/etc/rc.local
/usr/local/nagios/bin/ndo2db -c /usr/local/nagios/etc/ndo2db.cfg
9、如果希望对Linux受监控端的机器进行更细粒度的监控，需要安装NRPE
在客户机（受监控端），解压后：
./configure –enable-ssl –enable-command-args
make all
make install
将下面命令行运行并加入/etc/rc.local：
/usr/sbin/nrpe -c /etc/nrpe.cfg -d
在服务器（监控端），解压后：
./configure –enable-ssl –enable-command-args
make all
make install
cp sample-config/nrpe.cfg /etc/
cp src/nrpe /usr/sbin/
cp src/check_nrpe /usr/local/nagios/libexec/
在 objects/commands.cfg 中定义 check_nrpe 使用的命令：
‘check_nrpe’ command definition#
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
之后调整server的配置，加入check_nrpe，并重载nagios.cfg，就可以使用nrpe的功能了。
再次说明，本文中的配置和脚本多数来自：http://www.linuxtone.org/viewthread.php?tid=514，不知道是否原始出处，记录。