當Prometheus的node_exporter中沒有咱們須要的一些監控項時,就能夠如zabbix同樣定製一些key,讓其支持咱們所須要的監控項。html
例如,我要根據 邏輯cpu核數 來肯定load的告警值,如今就要添加一個統計 邏輯cpu核數的 keynode
mkdir /usr/local/node_exporter-0.16/key vim /usr/local/node_exporter-0.16/key/Logical_CPU_core_number cat /proc/cpuinfo| grep "processor"| wc -l
vim /usr/local/node_exporter-0.16/key/key_runner #!/bin/bash # Runs a textfile collector. textfile_dir=/usr/local/node_exporter-0.16/key source /etc/profile.d/node_exporter.sh metric="$1" shift script="$textfile_dir/$metric" prom_file="$textfile_dir/$metric".prom echo $textfile_dir $script if [[ ! -x "$script" || -d "$script" ]]; then echo "ERROR: Can't find script for '$metric'. Aborting." exit 1 fi VALUE=`"$script" "$@"` if [[ ! -n $VALUE ]]; then exit 0 # echo "ERROR: Can't get value for '$metric'. Aborting." # exit 1 else echo "# TYPE ${metric} gauge"> "$prom_file".$$ echo "${metric} ${VALUE}" >> "$prom_file".$$ && mv "$prom_file".$$ "$prom_file" fi
添加權限vim
chmod 755 /usr/local/node_exporter-0.16/key/*
運行命令$1參數不用加路徑,以後會生成一個prom文件,exporter能夠識別該文件,收集數據centos
bash /usr/local/node_exporter-0.16/key/key_runner Logical_CPU_core_number [root@centos3 key]# ll total 12 -rwxr-xr-x 1 root root 641 Feb 21 11:50 key_runner -rwxr-xr-x 1 root root 43 Feb 21 11:56 Logical_CPU_core_number -rw-r--r-- 1 root root 69 Feb 21 11:54 Logical_CPU_core_number.prom [root@centos3 key]# cat Logical_CPU_core_number.prom # TYPE Logical_CPU_core_number gauge Logical_CPU_core_number 1
啓動node_exporter,指定新加key值的prom路徑bash
./node_exporter --collector.textfile.directory=/usr/local/node_exporter-0.16/key
查看metrics值是否新增了該監控項curl
curl localhost:9100/metrics > aaa vim aaa TYPE Logical_CPU_core_number gauge Logical_CPU_core_number 1
=======================================================ide
用一個腳本實現多個監控項key value的添加post
cat /usr/local/node_exporter/key/key_runner #! /bin/bash prom_file=/usr/local/node_exporter/key/key.prom IFS=";" export TERM=vt100 key_value=" Logical_CPU_core_total `cat /proc/cpuinfo| grep "processor"| wc -l`; logined_users_total `who | wc -l`; procs_total `/bin/top -b -n 1|grep Tasks|sed 's/,/\n/g'|grep total|awk '{ print $(NF-1) }'`; procs_zombie `/bin/top -b -n 1|grep Tasks|sed 's/,/\n/g'|grep zombie|awk '{ print $(NF-1) }'`" for i in $key_value do IFS=" " j=(`echo $i`) key=${j[0]} value=${j[1]} echo $key $value >> "$prom_file".tmp done cat "$prom_file".tmp > $prom_file rm -rf "$prom_file".tmp IFS=$OLD_IFS
執行效果優化
[root@Prometheus key]# ll total 8 -rw-r--r-- 1 root root 82 Mar 11 16:45 key.prom -rwxr-xr-x 1 root root 628 Mar 1 19:23 key_runner [root@Prometheus key]# cat key.prom Logical_CPU_core_total 4 logined_users_total 2 procs_total 129 procs_zombie 0