nagios监控heartbeat

heartbeat架好后，我们就需要监控起来喽，下面我们就来了解下怎么监控。

首先来了解下几个命令，这几个命令在heartbeat安装后会自动加上，我们的监控脚本就用到这几个命令。

[[email protected] libexec]# which cl_status
/usr/bin/cl_status
[[email protected] libexec]# cl_status listnodes   #列出当前heartbeat集群中的节点
192.168.3.1
usvr-211
usvr-210
[[email protected] libexec]# cl_status nodestatus usvr-211  #列出节点的状态
active
[[email protected] libexec]# cl_status nodestatus 192.168.3.1  #列出节点的状态
ping

我们的check_heartbeat.sh原理就是列出集群中所有节点，并监测所有节点的状态是否正常，我们实验的节点状态为ping和active。

当active+ping的个数为0时critical

当active+ping的个数小于节点总个数时为wart

当active+ping的个数等于节点总个数时为ok

[[email protected] libexec]# cat check_heartbeat.sh
#!/bin/bash
# Author: Emmanuel Bretelle
# Date: 12/03/2010
# Description: Retrieve Linux HA cluster status using cl_status
# Based on http://www.randombugs.com/linux/howto-monitor-linux-heartbeat-snmp.html
#
# Autor: Stanila Constantin Adrian
# Date: 20/03/2009
# Description: Check the number of active heartbeats
# http://www.randombugs.com

# Get program path
REVISION=1.3
PROGNAME=`/bin/basename $0`
PROGPATH=`echo $0 | /bin/sed -e 's,[\\/][^\\/][^\\/]*$,,'`

NODE_NAME=`uname -n`
CL_ST='/usr/bin/cl_status'

#nagios error codes
#. $PROGPATH/utils.sh
OK=0
WARNING=1
CRITICAL=2
UNKNOWN=3

usage () {
    echo "Nagios plugin to heartbeat.

Usage:
  $PROGNAME
  $PROGNAME [--help | -h]
  $PROGNAME [--version | -v]

Options:
  --help -l	Print this help information
  --version -v  Print version of plugin
"
}

help () {
    print_revision $PROGNAME $REVISION
    echo; usage; echo; support
}

while test -n "$1"
do
  case "$1" in
    --help | -h)
      help
      exit $STATE_OK;;
    --version | -v)
      print_revision $PROGNAME $REVISION
      exit $STATE_OK;;
#    -H)
#      shift
#      HOST=$1;;
#    -C)
#      shift
#      COMMUNITY=$1;;
    *)
      echo "Heartbeat UNKNOWN: Wrong command usage"; exit $UNKNOWN;;
  esac
  shift
done

$CL_ST hbstatus > /dev/null
res=$?
if [ $res -ne 0 ]
then
  echo "Heartbeat CRITICAL: Heartbeat is not running on this node"
  exit $CRITICAL
fi

declare -i I=0
declare -i A=0
NODES=`$CL_ST listnodes`

for node in $NODES
do
  status=`$CL_ST nodestatus $node`
  let I=$I+1
#  if [ $status == "active" ] 默认情况下检测active状态的个数，但是ping状态也为正常状态，因此改成如下条件。
  if [ $status == "active" -o $status == "ping" ]
  then
    let A=$A+1
  fi
done

if [ $A -eq 0 ]
then
  echo "Heartbeat CRITICAL: $A/$I"
  exit $CRITICAL
elif [ $A -ne $I ]
then
  echo "Heartbeat WARNING: $A/$I"
  exit $WARNING
else
  echo "Heartbeat OK: $A/$I"
  exit $OK
fi

我们在nagios客户端，也就是我们的lvs集群usvr-210，usvr-211，我们通过nagios服务器端的check_nrpe来获取监控信息。

naigos客户端

1.先将脚本复制到nagios命令目录下并修改相应权限

cp check_heartbeat.sh /usr/local/nagios/libexec/

chmod a+x check_heartbeat.sh

chown nagios.nagios check_heartbeat.sh

2.在naigos客户端的配置文件中加入监控命令。

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

command[check_heartbeat]=/usr/local/nagios/libexec/check_heartbeat.sh

3.重新载入配置文件。

service xinetd reload

nagios服务端

1.加入相关监控服务

define service {
    use                     local-service
    service_description     heartbeat-lvs-master
    check_command           check_nrpe!check_heartbeat
    service_groups          heartbeat_services
    host_name               usvr-210
    check_interval          5
    notifications_enabled   1
    notification_interval   30
    contact_groups          admins
}
define service {
    use                     local-service
    service_description     heartbeat-lvs-slave
    check_command           check_nrpe!check_heartbeat
    service_groups          heartbeat_services
    host_name               usvr-211
    check_interval          5
    notifications_enabled   1
    notification_interval   30
    contact_groups          admins
}

2.检查并载入配置文件

nagioscheck

service nagios reload

监控如下：

ok，我们的heartbeat监控完成了。

我是参考这个网站http://wiki.debuntu.org/wiki/Linux_HA_Heartbeat/Monitoring_with_Nagios，希望能对大家有所帮助。