1. 检测nginx进程是否存在异常
   `#!/bin/bash

收集nginx进程pid

pid=$(ps -ef |grep nginx|grep worker|awk '{print $2}')

收集第一个nginx进程的pid,打上时间戳

pid0=$(ps -ef |grep nginx|grep worker|awk '{print $2}'|head -n 1)
starttime0=$(ps -o lstart= -p $pid0)
starttimestamp0=$(date -d "$starttime0" +%s)
result=""

判断每个pid是否与第一个的启动时间相等

for i in $pid ; do

starttime=$(ps -o lstart= -p $i)
starttimestamp=$(date -d "$starttime" +%s)

if [ $starttimestamp0 -eq $starttimestamp ];then 
	result+="ture"
else 
	result+="false"
fi

done

如果存在不同的则重载nginx

if [[ $result == "false" ]] ; then
echo "=发现nginx存在异常进程，正在重载="
/usr/sbin/nginx -s reload
else
echo "=nginx进程未发现异常="
fi
`

2. 校验每个节点的配置是否一致
   `#!/bin/bash
   hosts=(18.12 18.13 18.14)

echo "=检测conf.d/下的文件="

for i in ${hosts[*]};do

递归计算目录中所有文件的MD5值

dir1="/usr/local/nginx/conf/conf.d"
dir2=ssh ${i} "cd /usr/local/nginx/conf/conf.d && pwd"
calculate_md5() {
local dir="$1"
find "$dir" -type f -exec md5sum {} ; | sort -k 2 | awk '{print $1}'
}

对比两个MD5列表是否一致

compare_md5() {
  local list1="$1"
  local list2="$2"
  temp_file1=$(mktemp)
  temp_file2=$(mktemp)
  echo "$list1" > "$temp_file1"
  echo "$list2" > "$temp_file2"
  diff "$temp_file1" "$temp_file2" >/dev/null
  rm -f "$temp_file1" "$temp_file2"
}

计算两个目录的MD5值并进行比较

md5_list1=$(calculate_md5 "$dir1")
md5_list2=$(calculate_md5 "$dir2")

if compare_md5 "$md5_list1" "$md5_list2"; then
echo "${i}的conf.d目录的文件一致"
else
echo "${i}的conf.d目录的文件不一致"
fi

done

echo "=检测nginx.conf="
Md5sum=md5sum /usr/local/nginx/conf/nginx.conf
echo -e "\n18.11nginx.conf的md5值：$Md5sum"
for i in ${hosts[*]};do

md5=`ssh ${i} "md5sum  /usr/local/nginx/conf/nginx.conf"`

if [ "$Md5sum"x = "$md5"x ]; then
    echo -e "\n${i}nginx.conf文件正常,正在重载"
    ssh ${i} "/usr/sbin/nginx -s reload"
    sleep 2
else
    echo -e "\n${i}nginx.conf文件异常,请排查！！"
    echo -e \n$md5
fi

done`

3. 运行此脚本从svn更新配置，并调用上面两个脚本检测配置和进程
   `#!/bin/bash

svn update更新nginx配置

cd /usr/local/nginx/conf && svn up

hosts=(18.12 18.13 18.14)

for i in ${hosts[*]};do
echo $i
ssh $i "cd /usr/local/nginx/conf && svn up"
sleep 2
done

sleep 15

调用脚本检查nginx配置、重载配置

sh /root/checkng/check_ngconf.sh

调用脚本检查nginx进程是否异常，异常则重载

echo -e "\n=检查18.11进程是否异常="
sh /root/checkng/ng_reload_check.sh

for i in ${hosts[*]};do
echo -e "\n=检查$i进程是否异常="
ssh $i "sh /root/checkng/ng_reload_check.sh"
don`