服务监控的方案有很多，譬如naigos，zabbix这种，不但可以监控服务，还可以监控cpu、内存、磁盘、网络流量、服务端口等，关于naigos和zabbix的搭建配置，需要另外篇幅介绍，这里使用服务器自身的定时任务+脚本+邮件功能完成一个简单的监控。
Part1 邮件服务搭建
安装mailx
yum -y install mailx
############################
##qq个人邮箱配置
############################
vim /etc/mail.rc
添加如下配置：
set [email protected]
set smtp=smtps://smtp.qq.com:465
set [email protected]
set smtp-auth-password=你的 QQ 邮箱授权码 （登录qq邮箱到账户设置中，打开smtp服务时，提示的验证码，此验证码非密码。）
set smtp-auth=login
#set smtp-use-starttls 这里是不需要配置的，很多地方没说明，配置了反而会验证失败，所以我注释掉；
set ssl-verify=ignore
set nss-config-dir=/root/.certs##创建证书
mkdir -p /root/.certs/
cd /root/.certs/
echo -n | openssl s_client -connect smtp.qq.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/qq.crt
certutil -A -n "GeoTrust SSL CA" -t "C,," -d ~/.certs -i ~/.certs/qq.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/qq.crt
certutil -L -d /root/.certs
##认证
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ./ -i qq.crt#返回如下提示即可：
Notice: Trust flag u is set automatically if the private key is present.
#发送主题为“邮箱测试”，内容为当前目录下 message_fiel.txt 文件内容到 [email protected] 邮箱。
mailx -s "邮箱测试" [email protected] < message_file.txt
############################
##qq企业邮箱配置
############################
vim /etc/mail.rc
添加如下配置:
set [email protected]
set smtp=smtps://smtp.exmail.qq.com:465
set [email protected]
set smtp-auth-password=*****(登录密码，不同于个人邮箱的授权码)
set smtp-auth=login
set ssl-verify=ignore
set nss-config-dir=/etc/pki/nssdb/cd /etc/pki/nssdb/
#生成证书
echo -n | openssl s_client -connect smtp.qq.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /etc/pki/nssdb/qq.crt
certutil -A -n "GeoTrust SSL CA" -t "C,," -d /etc/pki/nssdb/ -i /etc/pki/nssdb/qq.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d /etc/pki/nssdb/ -i /etc/pki/nssdb/qq.crt
certutil -L -d /etc/pki/nssdb/
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ./ -i qq.crt #认证同样，认证完会返回如下提示：
Notice: Trust flag u is set automatically if the private key is present.
##测试echo "this email come from centos 172.36.27.71"|mail -v -s "mysql check test" [email protected]
Part2 监控脚本准备
- mysql监控脚本
大致想法：mysql监控脚本分别运行在两个实例上，如果当前实例宕机，则重启本机mysql服务，如果其他服务器上的mysql连接不上则邮件通知。
#!/bin/bash
notify_addr='[email protected],[email protected]'
error_log="/opt/script/logs/check_mysql.err"
###定义一个简单判断mysql是否可用的函数
function excute_query {
echo -e "`date "+%F %H:%M:%S"` -----checking mysql instance $1 by querying -----" >> ${error_log}
/usr/local/mysql/bin/mysql -uroot -pPASWD -h $1 --port 30468 -e "select 1;" 2>> ${error_log}
}
###定义无法执行查询，且mysql服务异常时的处理函数
function service_error {
echo -e "`date "+%F %H:%M:%S"` -----mysql service error，notify manager now-----" >> ${error_log}
systemctl restart mysql.service
echo "$1 无法连接并被重启"|mail -s "MYSQL $1 实例正在被重启, 请及时登录查看状态！" ${notify_addr} 2>> ${error_log}
echo -e "\n---------------------------------------------------------\n" >> ${error_log}
}
###定义无法执行查询,但mysql服务正常的处理函数
function query_error {
echo -e "`date "+%F %H:%M:%S"` -----mysql instance $1 query error, retry after 30s-----" >> ${error_log}
sleep 30
excute_query $1
if [ $? -ne 0 ];then
echo -e "`date "+%F %H:%M:%S"` -----mysql instance $1 still can't execute query-----" >> ${error_log}
echo "mysql isntance $1 is down"|mail -s "MYSQL $1 无法连接查询, 请及时处理！from(172.36.27.70)" ${notify_addr} 2>> ${error_log}
else
echo -e "`date "+%F %H:%M:%S"` -----mysql instance $1 query ok after 10s-----" >> ${error_log}
echo -e "\n---------------------------------------------------------\n" >> ${error_log}
fi
}
###监控本机mysql状态
excute_query 172.36.27.70
if [ $? -ne 0 ];then
systemctl status mysql.service &>/dev/null
if [ $? -ne 0 ];then
service_error 172.36.27.70
else
query_error 172.36.27.70
fi
else
echo -e "\n-----------mysql instance 172.36.27.70 is ok for query-------------\n" >> ${error_log}
fi
###监控备机mysql状态
excute_query 172.36.27.71
if [ $? -ne 0 ];then
query_error 172.36.27.71
else
echo -e "\n-----------mysql instance 172.36.27.71 is ok for query-------------\n" >> ${error_log}
fi- mongo监控脚本
大致思想：通过mongo命令登录或者mongostat判断节点是否正常运行。
notify_addr='[email protected],[email protected]'
error_log="/opt/script/logs/check_mongo.err"
###定义一个简单判断mysql是否可用的函数
function connect_db {
echo -e "`date "+%F %H:%M:%S"` -----checking mongo instance $1 by login -----" >> ${error_log}
echo "db.serverStatus().mem" | /usr/local/mongodb/bin/mongo admin -uroot -pPWD --host $1 --port 20467 2>> ${error_log}
}
function replication_stat_query {
echo -e "`date "+%F %H:%M:%S"` -----checking mongo instance $1 by mongostat -----" >> ${error_log}
/usr/local/mongodb/bin/mongostat --uri=mongodb://suroot:PWD@$1:20467/admin 2>> ${error_log}
}
###定义无法执行查询，且mysql服务异常时的处理函数
function service_error {
echo -e "`date "+%F %H:%M:%S"` -----mongo service $1 error，notify manager now-----" >> ${error_log}
##/usr/local/mongo/bin/mongod -f /etc/mongo.conf --shutdown
echo "$1 mongo连接失败，请及时处理"|mail -s "Mongo $1 实例无法连接, 请及时登录处理！from(172.26.27.70)" ${notify_addr} 2>> ${error_log}
echo -e "\n---------------------------------------------------------\n" >> ${error_log}
}
###监控本机mongo node 状态
function monitor_node {
connect_db $1
if [ $? -ne 0 ];then
service_error $1
#else
#replication_stat_query $1
#if [ $? -ne 0 ];then
#service_error $1
#else
#echo -e "\n-----------mongostat of node $1 is ok! -------------\n" >> ${error_log}
echo -e "\n-----------mongo connection to node $1 is ok! -------------\n" >> ${error_log}
#fi
fi
}
###监控本机mongo node 状态
monitor_node 172.36.27.70
monitor_node 172.36.27.71
monitor_node 172.36.27.72- redis监控脚本
大致思想： 通过redis-cli登录并检索clusterinfo是否enable来判断该节点及集群是否正常工作。
#!/bin/bash
notify_addr='[email protected],[email protected]'
error_log="/opt/script/logs/check_redis.err"
###定义无法执行查询，且mysql服务异常时的处理函数
function service_error {
echo -e "`date "+%F %H:%M:%S"` -----redis service $1:$2 error，notify manager now-----" >> ${error_log}
##/usr/local/mongo/bin/mongod -f /etc/mongo.conf --shutdown
echo "$1 redis连接异常，请及时处理"|mail -s "Redis $1:$2 节点连接失败, 请及时登录处理！(from 172.36.27.70)" ${notify_addr} 2>> ${error_log}
echo -e "\n---------------------------------------------------------\n" >> ${error_log}
}
###监控redis 状态
function monitor_node {
echo -e "`date "+%F %H:%M:%S"` -----checking mongo redis $1:$2 by cli -----" >> ${error_log}
/usr/local/bin/redis-cli -h $1 -p $2 -a PWD info |grep cluster_enabled
if [ $? -ne 0 ];then
service_error $1 $2
echo -e "\n-----------redis connection to node $1:$2 is ok! -------------\n" >> ${error_log}
fi
}
###监控本机mongo node 状态
monitor_node 172.36.27.70 6239
monitor_node 172.36.27.70 6339
monitor_node 172.36.27.71 6239
monitor_node 172.36.27.71 6339
monitor_node 172.36.27.72 6239
monitor_node 172.36.27.72 6339- rabbitmq监控脚本
通过rabbitmqctl查看集群状态或者节点状态
#!/bin/bash
notify_addr='[email protected],[email protected]'
error_log="/opt/script/logs/check_redis.err"
###定义无法执行查询，且mysql服务异常时的处理函数
function service_error {
echo -e "`date "+%F %H:%M:%S"` -----rabbitmq service error，notify manager now-----" >> ${error_log}
#ps -ef | grep ^rabbitmq | awk '{print $2}' | xargs kill -9
#service rabbitmq-server start
echo "$1 rabbitmq服务异常, 请及时处理"|mail -s " $1 RabbitMQ服务异常, 请及时登录处理！（from $2）" ${notify_addr} 2>> ${error_log}
echo -e "\n---------------------------------------------------------\n" >> ${error_log}
}
###监控rabbitmq 状态
function monitor_node {
echo -e "`date "+%F %H:%M:%S"` -----checking mongo redis $1:$2 by cli -----" >> ${error_log}
#/usr/lib/rabbitmq/bin/rabbitmqctl cluster_status |grep cluster_name
/usr/sbin/rabbitmqctl cluster_status | grep cluster_name
if [ $? -ne 0 ];then
service_error $1 $2
echo -e "\n-----------redis connection to node $1:$2 is ok! -------------\n" >> ${error_log}
fi
}
monitor_node 172.36.27.72 172.36.27.72Part3 定时任务配置
crontab -e
*/1 * * * * /opt/script/check_mysql.sh > /opt/script/logs/cron_result.log 2>&1
*/3 * * * * /opt/script/check_mongo.sh > /opt/script/logs/cron_result.log 2>&1
*/5 * * * * /opt/script/check_redis.sh > /opt/script/logs/cron_result.log 2>&1
*/5 * * * * /opt/script/check_rabbitmq.sh > /opt/script/logs/cron_result.log 2>&1