昨天我将服务器从 Debian 9 升级到 Debian 10。该服务器由 nagios 监控。升级后,我收到一条警报,状态未知:
“卷组 array03-0 无效或未使用“-v Volumegroup”指定,再见。 false
该服务是VG baie03-0用法,其命令是check_nrpe!check_vgs_array03-0。该服务的目标是在阵列上的存储几乎已满时生成警报。
check_nrpe 命令是标准的:
# 'check_NRPE' command definition
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
如果我没记错的话,这意味着我在受监督服务器上的 /etc/nagios/nrpe.cfg 中有一个 check_vgs_array03-0 命令。让我们看一下,它是:
命令[check_vgs_array03-0]=/usr/lib/nagios/plugins/check_vg_size -w 20 -c 10 -v array03-0
如果我只是在受监督的服务器上键入此命令,则没有错误,它可以工作。
VG array03-0 OK 可用空间为 805 GB;| array03-0=805GB;20;10;0;19155
例如,如果我键入不存在的卷组名称,则会收到错误消息。
check_vg_size插件脚本如下:
#!/bin/bash
#check_vg_size
#set -x
# Plugin for Nagios
# Written by M. Koettenstorfer ([email protected])
# Some additions by J. Schoepfer ([email protected])
# Major changes into functions and input/output values J. Veverka ([email protected])
# Last Modified: 2012-11-06
#
# Description:
#
# This plugin will check howmany space in volume groups is free
# Nagios return codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
STATE_DEPENDENT=4
SERVICEOUTPUT=""
SERVICEPERFDATA=""
PROGNAME=$(basename $0)
vgs_bin=`/usr/bin/whereis -b -B /sbin /bin /usr/bin /usr/sbin -f vgs | awk '{ print $2 }'`
_vgs="$vgs_bin --units=g"
bc_bin=`/usr/bin/whereis -b -B /sbin /bin /usr/bin /usr/sbin -f bc | awk '{ print $2 }'`
exitstatus=$STATE_OK #default
declare -a volumeGroups;
novg=0; #number of volume groups
allVG=false; #Will we use all volume groups we can find on system?
inPercent=false; #Use percentage for comparison?
unitsGB="GB"
unitsPercent="%"
units=$unitsGB
########################################################################
### DEFINE FUNCTIONS
########################################################################
print_usage() {
echo "Usage: $PROGNAME -w <min size warning level in gb> -c <min size critical level in gb> -v <volumegroupname> [-a] [-p]"
echo "If '-a' and '-v' are specified: all volumegroups defined by -v will be ommited and the remaining groups which are found on system are checked"
echo "If '-p' is specified: the warning and critical levels are represented as the percent space left on device"
echo ""
}
print_help() {
print_usage
echo ""
echo "This plugin will check how much space is free in volume groups"
echo "usage: "
exit $STATE_UNKNOWN
}
checkArgValidity () {
# Check arguments for validity
if [[ -z $critlevel || -z $warnlevel ]] # Did we get warn and crit values?
then
echo "You must specify a warning and critical level"
print_usage
exitstatus=$STATE_UNKNOWN
exit $exitstatus
elif [ $warnlevel -le $critlevel ] # Do the warn/crit values make sense?
then
if [ $inPercent != 'true' ]
then
echo "CRITICAL value of $critlevel GB is less than WARNING level of $warnlevel GB"
print_usage
exitstatus=$STATE_UNKNOWN
exit $exitstatus
else
echo "CRITICAL value of $critlevel % is higher than WARNING level of $warnlevel %"
print_usage
exitstatus=$STATE_UNKNOWN
exit $exitstatus
fi
fi
}
#Does volume group actually exist?
volumeGroupExists () {
local volGroup="$@"
VGValid=$($_vgs 2>/dev/null | grep "$volGroup" | wc -l )
if [[ -z "$volGroup" || $VGValid = 0 ]]
then
echo "Volumegroup $volGroup wasn't valid or wasn't specified"
echo "with \"-v Volumegroup\", bye."
echo false
return 1
else
#The volume group exists
echo true
return 0
fi
}
getNumberOfVGOnSystem () {
local novg=$($_vgs 2>/dev/null | wc -l)
let novg--
echo $novg
}
getAllVGOnSystem () {
novg=$(getNumberOfVGOnSystem)
local found=false;
for (( i=0; i < novg; i++)); do
volumeGroups[$i]=$($_vgs | tail -n $(($i+1)) | head -n 1 | awk '{print $1}')
found=true;
done
if ( ! $found ); then
echo "$found"
echo "No Volumegroup wasn't valid or wasn't found"
exit $STATE_UNKNOWN
fi
}
getColumnNoByName () {
columnName=$1
result=$($_vgs 2>/dev/null | head -n1 | awk -v name=$columnName '
BEGIN{}
{ for(i=1;i<=NF;i++){
if ($i ~ name)
{print i } }
}')
echo $result
}
convertToPercent () {
#$1 = xx%
#$2 = 100%
# Make values numbers only
local input="$(echo $1 | sed 's/g//i')"
local max="$(echo $2 | sed 's/g//i')"
local onePercent='';
local freePercent='';
if [ -x "$bc_bin" ] ; then
onePercent=$( echo "scale=2; $max / 100" | bc );
freePercent=$( echo "$input / $onePercent" | bc );
else
freePercent=$(perl -e "print int((($max-$input)*100/$max))")
fi
echo $freePercent;
return 0;
}
getSizesOfVolume () {
volumeName="$1";
#Check the actual sizes
cnFree=`getColumnNoByName "VFree"`;
cnSize=`getColumnNoByName "VSize"`;
freespace=`$_vgs $volumeName 2>/dev/null | awk -v n=$cnFree '/[0-9]/{print $n}' | sed -e 's/[\.,\,].*//'`;
fullspace=`$_vgs $volumeName 2>/dev/null | awk -v n=$cnSize '/[0-9]/{print $n}' | sed -e 's/[\.,\,].*//'`;
if ( $inPercent ); then
#Convert to Percents
freespace="$(convertToPercent $freespace $fullspace)"
fi
}
setExitStatus () {
local status=$1
local volGroup="$2"
local formerStatus=$exitstatus
if [ $status -gt $formerStatus ]
then
formerStatus=$status
fi
if [ $status = $STATE_UNKNOWN ] ; then
SERVICEOUTPUT="${volGroup}"
exitstatus=$STATE_UNKNOWN
return
fi
if [ "$freespace" -le "$critlevel" ]
then
SERVICEOUTPUT=$SERVICEOUTPUT" VG $volGroup CRITICAL Available space is $freespace $units;"
exitstatus=$STATE_CRITICAL
elif [ "$freespace" -le "$warnlevel" ]
then
SERVICEOUTPUT=$SERVICEOUTPUT"VG $volGroup WARNING Available space is $freespace $units;"
exitstatus=$STATE_WARNING
else
SERVICEOUTPUT=$SERVICEOUTPUT"VG $volGroup OK Available space is $freespace $units;"
exitstatus=$STATE_OK
fi
SERVICEPERFDATA="$SERVICEPERFDATA $volGroup=$freespace$units;$warnlevel;$critlevel"
if [ $inPercent != 'true' ] ; then
SERVICEPERFDATA="${SERVICEPERFDATA};0;$fullspace"
fi
if [ $formerStatus -gt $exitstatus ]
then
exitstatus=$formerStatus
fi
}
checkVolumeGroups () {
checkArgValidity
for (( i=0; i < novg; i++ )); do
local status="$STATE_OK"
local currentVG="${volumeGroups[$i]}"
local groupExists="$(volumeGroupExists "$currentVG" )"
if [ "$groupExists" = 'true' ]; then
getSizesOfVolume "$currentVG"
status=$STATE_OK
else
status=$STATE_UNKNOWN
setExitStatus $status "${groupExists}"
break
fi
setExitStatus $status "$currentVG"
done
}
########################################################################
### RUN PROGRAM
########################################################################
########################################################################
#Read input values
while getopts ":w:c:v:h:ap" opt ;do
case $opt in
h)
print_help;
exit $exitstatus;
;;
w)
warnlevel=$OPTARG;
;;
c)
critlevel=$OPTARG;
;;
v)
if ( ! $allVG ); then
volumeGroups[$novg]=$OPTARG;
let novg++;
fi
;;
a)
allVG=true;
getAllVGOnSystem;
;;
p)
inPercent=true;
units=$unitsPercent
;;
\?)
echo "Invalid option: -$OPTARG" >&2
;;
esac
done
checkVolumeGroups
echo $SERVICEOUTPUT"|"$SERVICEPERFDATA
exit $exitstatus
我对 check_nrpe 命令使用另一个 arg (另一个脚本),它可以工作。
例如 :
root@nagiosserver:/usr/local/nagios# /usr/local/nagios/libexec/check_nrpe -H srv-supervised04 -c check_load OK - 平均负载:3.79、2.99、1.83|load1=3.790;25.000;30.000;0;负载5=2.990;20.000;25.000;0;负载15=1.830;15.000;20.000;0;
VG array03-0 确实存在:
root@srv-supervised04:/usr/lib/nagios/plugins# vgdisplay --- 卷组 --- VG 名称 array03-0 系统 ID 格式
lvm2 元数据区域 1 元数据序列号 34 VG 访问读/写 VG 状态可调整大小 MAX LV 0 当前 LV 5 打开 LV 4 最大 PV
0 当前 PV 1 实际 PV 1 VG 大小
<18,71 TiB PE 大小 4,00 MiB 总 PE
4903887 分配 PE / 大小 4697600 / <17,92 TiB 空闲 PE / 大小 206287 / < 805,81 GiB VG UUID
OgzAMF-DGbW-3t3L-Wk7k-gY1g-s6fH-zYEKad
所以。 VG确实存在。 check_vg_size 插件在本地使用时有效,check_nrpe 命令在与另一个插件一起使用时在 nagios 服务器上工作,但 check_vg_size 在 nagios 服务器上不起作用。错误消息显然是 array03-0 不存在,而它确实存在。我没有更改所有文件中的任何内容。它随 Debian 从 9 更新到 10 一起出现(在安装过程中,我决定保留我的 nrpe.cfg 修改文件)。
有人知道它来自哪里吗? Debian 版本?也许是新的 bash 版本? nagios 服务器(仍然是 Debian 9)和受监督服务器(Debian 10)之间不兼容?
答案1
我修好了它。
这是一个权限问题。我必须向插件上的 nagios 用户授予 sudo 权限。
nagios ALL=(root) NOPASSWD: /usr/lib/nagios/plugins/check_vg_size
然后修改
/etc/nrpe.cfg
在命令开始之前添加 sudo
command[check_vgs_array03-0]= sudo /usr/lib/nagios/plugins/check_vg_size -w 20 -c 10 -v array03-0