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如何通过脚本动态计算Swap警告/严重？

tag-icon • tag-icon scripting swap nagios
如何通过脚本动态计算Swap警告/严重？

我在下面的脚本中使用了 SAR，并尝试在各个服务器上运行以进行 nagios 监控。有人可以建议我如何在下面的检查中获得交换警告并交换临界值吗？我尝试在每台服务器上运行以下命令时动态计算它，但它报告错误。

（交换警告/严重需要分别计算为总交换的 20%/总交换的 40%）

请建议。

# 2 = CRITICAL (SWAP usage higher than CRITICAL)
# 3 = UNKNOWN (Wrong usage)

SWAP_WARN=
SWAP_CRIT=
SWAPOUT_ACTIVITY_TEST=

## GET SWAP Warning and Critical values from the Machine

# 2 = CRITICAL (SWAP usage higher than CRITICAL)
# 3 = UNKNOWN (Wrong usage)

SWAP_WARN=
SWAP_CRIT=
SWAPOUT_ACTIVITY_TEST=

**## GET SWAP Warning and Critical values from the Machine
temp=$(swapon -s | tail -n 1 | awk '{print $3}' )
SWAP_WARN=$(echo '$(temp)*.20' | bc)
SWAP_CRIT=$(echo '$(temp)*.40' | bc)**

## FETCH ARGUMENTS
##while getopts "h:" OPTION; do
#        case "${h}" in
#                 h)
#                        usage
#                        exit 3
#                        ;;
#                ?)
#                        usage
#                        exit 3
#                        ;;
#        esac
#done

## CHECK ARGUMENTS
if [ -z ${SWAP_WARN} ] || [ -z ${SWAP_CRIT} ] || [ ${SWAP_WARN} -gt ${SWAP_CRIT} ] ; then
        usage
        exit 3
fi

## GET SWAP INFO FROM MACHINE

cd /var/log/sa
FOR_VALUE=sa
FOR_DATE=$(date | awk '{print $3}')
SA=$FOR_VALUE$FOR_DATE
SWAPOUT_ACTIVITY_TEST=$(sar -S -f $SA | tail -n 2| head -n 1 | awk '{print $4}')


## CHECK SWAPPING ON MACHINE
if [ ${SWAPOUT_ACTIVITY_TEST} -lt ${SWAP_WARN} ]; then
        ## SWAP IS OK
        LINE="OK! Swapout size in last 10 minutes : ${SWAPOUT_ACTIVITY_TEST} | swapout_size=${SWAPOUT_ACTIVITY_TEST}B;${SWAP_WARN};${SWAP_CRIT};"
        echo $LINE
        exit 0
elif [ ${SWAPOUT_ACTIVITY_TEST} -gt ${SWAP_WARN} ] && [ ${SWAPOUT_ACTIVITY_TEST} -lt ${SWAP_CRIT} ] || [ ${SWAPOUT_ACTIVITY_TEST} -eq ${SWAP_WARN} ]; then
        ## SWAP IS IN WARNING STATE
        LINE="WARNING! Swapout size in last 10 minutes: ${SWAPOUT_ACTIVITY_TEST} | swapout_size=${SWAPOUT_ACTIVITY_TEST}B;${SWAP_WARN};${SWAP_CRIT};"
:

## FETCH ARGUMENTS
##while getopts "h:" OPTION; do
#        case "${h}" in
#                 h)
#                        usage
#                        exit 3
#                        ;;
#                ?)
#                        usage
#                        exit 3
#                        ;;
#        esac
#done

## CHECK ARGUMENTS
if [ -z ${SWAP_WARN} ] || [ -z ${SWAP_CRIT} ] || [ ${SWAP_WARN} -gt ${SWAP_CRIT} ] ; then
        usage
        exit 3
fi

## GET SWAP INFO FROM MACHINE

cd /var/log/sa
FOR_VALUE=sa
FOR_DATE=$(date | awk '{print $3}')
SA=$FOR_VALUE$FOR_DATE
SWAPOUT_ACTIVITY_TEST=$(sar -S -f $SA | tail -n 2| head -n 1 | awk '{print $4}')


## CHECK SWAPPING ON MACHINE
if [ ${SWAPOUT_ACTIVITY_TEST} -lt ${SWAP_WARN} ]; then
        ## SWAP IS OK
        LINE="OK! Swapout size in last 10 minutes : ${SWAPOUT_ACTIVITY_TEST} | swapout_size=${SWAPOUT_ACTIVITY_TEST}B;${SWAP_WARN};${SWAP_CRIT};"
        echo $LINE
        exit 0
elif [ ${SWAPOUT_ACTIVITY_TEST} -gt ${SWAP_WARN} ] && [ ${SWAPOUT_ACTIVITY_TEST} -lt ${SWAP_CRIT} ] || [ ${SWAPOUT_ACTIVITY_TEST} -eq ${SWAP_WARN} ]; then
        ## SWAP IS IN WARNING STATE
        LINE="WARNING! Swapout size in last 10 minutes: ${SWAPOUT_ACTIVITY_TEST} | swapout_size=${SWAPOUT_ACTIVITY_TEST}B;${SWAP_WARN};${SWAP_CRIT};"

答案1

check_swap您无法使用的任何具体原因nagios 插件？

check_swap -w 80% -c 60%

如果您坚持使用sar，为什么要计算阈值的绝对值，难道您不能只使用%swpused列中的值来确定检查状态吗？

SWPUSED=$(sar -S -f $SA | tail -2 | head -1 | awk '{print $5}')
SWPUSED_ROUNDED=$(printf "%.0f" $SWPUSED)

if [ $SWPUSED_ROUNDED -gt 40 ]; then
    echo "CRITICAL: ${SWPUSED}% of swap space used"
    exit 2
elif [ $SWPUSED_ROUNDED -gt 20 ]; then
    echo "WARNING: ${SWPUSED}% of swap space used"
    exit 1
else
    echo "OK: ${SWPUSED}% of swap space used"
    exit 0
fi

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