一.問題與思考
項目中使用IM中間件rabbitMQ,存在常駐進程異常退出,需要自動監測項目中所有的worker正常運行(異常退出worker監測與拉起).
二.流程處理
- 建立項目worker配置文件
- linux定時檢測worker狀態
- 當前worker狀態獲取
- 對於實際worker數據與配置不符合的,重置該業務worker進程數量
三.主要代碼實現
- 項目worker配置
[common_test]
cmd = common/test/index
test_procs = 2
prod_procs = 5
[msg_test]
cmd = msg/test/index
test_procs = 2
prod_procs = 5
- 當前worker狀態獲取及配置worker數量信息
<?php
/**
* Created by PhpStorm.
* User: 小小徐
* Date: 2019/8/25
* Time: 16:38
*/
$arr = parse_ini_file(__DIR__.'/../daemon2.ini',true);
if(getenv('APP_ENV') != 'prod'){
$needNumKey = "test_procs";
}else{
$needNumKey = "prod_procs";
}
foreach ($arr as $key=>$value)
{
$cmd = $value['cmd'];
$execNum = exec("ps aux|grep -v grep|grep $cmd|wc -l");
echo $key.' '.$cmd.' '.$execNum.'/'.$value[$needNumKey].PHP_EOL;
}
- 檢測當前worker數量是否和配置數量一致,不一致時修復worker進程
#!/bin/bash
executePath=$(readlink -f $(dirname $0))
executeLog=`readlink -f $executePath/check.log`
envPath=`readlink -f $executePath/../../env.sh`
source $envPath
set -a; source /etc/environment; set +a;
scriptIndex=`readlink -f $executePath/../console/index.php`
proStatusSaveFile="/var/www/html/proStatus.log"
proExecFile=`readlink -f $executePath/parseIni.php`
proccessName=
#declare -i proccessNum
#declare -i needNum
proccessNum=0
needNum=0
function setProccessNum
{
proccessNum=`ps aux|grep -v grep|grep $proccessName|wc -l`
}
function stop_pro()
{
setProccessNum
pids=$(ps aux|grep -v grep|grep ${proccessName}|awk '{ print $2 }')
for pid in $pids
do
setProccessNum
if [ $proccessNum -eq $needNum ]
then
break
fi
kill -9 $pid
done
}
function start_pro()
{
setProccessNum
while (( $proccessNum < $needNum ))
do
/usr/local/php/bin/php $scriptIndex $proccessName &
setProccessNum
done
}
function reset()
{
if [ $proccessNum -lt $needNum ]
then
echo "實際進程數爲:"$proccessNum"需要進程數爲:"$needNum"增加進程數..."
start_pro
elif [ $proccessNum -gt $needNum ]
then
echo "實際進程數爲:"$proccessNum"需要進程數爲:"$needNum"減少進程數..."
stop_pro
sleep 1
start_pro
fi
}
function checkType(){
local a="$1"
printf "%d" "$a" &>/dev/null && echo "integer" && return
printf "%d" "$(echo $a|sed 's/^[+-]\?0\+//')" &>/dev/null && echo "integer" && return
printf "%f" "$a" &>/dev/null && echo "number" && return
[ ${#a} -eq 1 ] && echo "char" && return
echo "string"
}
function proccessInit()
{
proccessName=$2
arr=($(echo $3 | awk 'BEGIN{FS="/";OFS=" "} {print strtonum($1),strtonum($2)}'))
proccessNum=${arr[0]}
needNum=${arr[1]}
setProccessNum
}
php $proExecFile > $proStatusSaveFile
while read line
do
proccessInit $line
reset
done < $proStatusSaveFile
四.遇到的問題與實現
php在計算的時候會自動將字符串類型的變量轉化爲數值類型,shell使用字符串實現運算時(判斷大於小於)會報錯!通過百度通過awk與strtonum解決該問題