Shell之批量监控主机磁盘使用率

1）本地磁盘监控

USE_RATE_LIST=$(df -h |awk '/^\/dev/{print $1"="int($5)}') #结果/dev/sda1=10
for USE_RATE in $USE_RATE_LIST; do
PART_NAME=${USE_RATE%=*}
USE_RATE=${USE_RATE#*=}
if [ $USE_RATE -ge 80 ]; then
echo "Warning: $PART_NAME Partition usage $USE_RATE%!"
fi
done

2）少台主机磁盘监控

HOST_IP=(192.168.1.130 192.168.1.131)
HOST_SUM=${#HOST_IP[*]}
TMP_FILE=/tmp/mon_host_disk.tmp
for ((i=0;i<$HOST_SUM;i++)); do
ssh root@${HOST_IP[i]} 'df -h' >$TMP_FILE
USE_RATE_LIST=$(awk '/^\/dev/{print $1"="int($5)}' $TMP_FILE)
for USE_RATE in $USE_RATE_LIST; do
PART_NAME=${USE_RATE%=*}
USE_RATE=${USE_RATE#*=}
if [ $USE_RATE -ge 80 ]; then
echo "Warning: $PART_NAME Partition usage $USE_RATE%!"
fi
done
done

3）多台主机磁盘监控
思路：前提监控端和被监控端可以SSH免交互认证，应写一个配置文件保存远程主机登陆信息
远程主机用户信息文件格式：IP User Port
例如：

$ cat host_info.txt
192.168.1.130 root 22

HOST_INFO=./host_info.txt
for IP in $(awk '/^[^#]/{print $1}' $HOST_INFO); do
USER=$(awk -v ip=$IP 'ip==$1{print $2}' $HOST_INFO)
PORT=$(awk -v ip=$IP 'ip==$1{print $3}' $HOST_INFO)
TMP_FILE=/tmp/mon_host_disk.tmp
ssh -p $PORT $USER@$IP 'df -h' >$TMP_FILE
USE_RATE_LIST=$(awk '/^\/dev/{print $1"="int($5)}' $TMP_FILE)
for USE_RATE in $USE_RATE_LIST; do
PART_NAME=${USE_RATE%=*}
USE_RATE=${USE_RATE#*=}
if [ $USE_RATE -ge 80 ]; then
echo "Warning: $PART_NAME Partition usage $USE_RATE%!"
fi
done
done