ansible+python+shell 实现SpringCloud微服务治理

前言：

    公司目前还是传统方式的微服务集群，使用的是SpringCloud架构，最近晚上经常出现服务注册失败，consul上的服务会下线，导致整个微服务应用不可以使用，出现Down机状态，这个时候到集群节点上通过 ps -ef|grep xxx.jar  发现服务进程还在，然后继续查看相应日志，找到了原因，由于微服务会每隔一段时间去自检mysql，mq的连通性，如果出现一个超时（公司使用aws，难免会出现超时），那么服务就任务自己是异常状态，从而自动退出，鉴于这种情况，博主自己设计了一套服务治理方案，可以在服务出现异常退出（异常是指由于网络延时，连接超时等）时，去优雅的重启服务，减少了人工干预。

环境介绍:

操作步骤:

1. 在 opsServer上操作：

安装ansible：

apt-get update #更新软件源中的所有软件列表
apt-get install ansible  #安装ansible

配置ansible:

vim /etc/ansible/ansible.cfg

[defaults]
inventory      = /etc/ansible/hosts
forks          = 5
remote_port    = 22
host_key_checking = False
timeout = 10
log_path = /var/log/ansible.log
[inventory]
[privilege_escalation]
[paramiko_connection]
[ssh_connection]
[persistent_connection]
[accelerate]
[selinux]
[colors]
[diff]

vim /etc/ansible/hosts

[webservers]
cloudServer1p ansible_ssh_user=cloud ansible_ssh_key=/home/cloud/.ssh/id_rsa
cloudServer2p ansible_ssh_user=cloud ansible_ssh_key=/home/cloud/.ssh/id_rsa
cloudServer3p ansible_ssh_user=cloud ansible_ssh_key=/home/cloud/.ssh/id_rsa


解释:
确保opsServer与cloudServer1p ，cloudServer2p ，cloudServer3p的ssh 打通，这里是用密钥进行认证

配置crontab任务:

crontab -l

*/5 * * * * /usr/bin/python /home/cloud/ops/manageCloudService1p.py `curl  -s http://cloudServer1p:8530/v1/agent/services` >/home/cloud/ops/cloudServer1p.log
*/5 * * * * /usr/bin/python /home/cloud/ops/manageCloudService2p.py `curl  -s http://cloudServer2p:8530/v1/agent/services` >/home/cloud/ops/cloudServer2p.log
*/5 * * * * /usr/bin/python /home/cloud/ops/manageCloudService3p.py `curl  -s http://cloudServer3p:8530/v1/agent/services` >/home/cloud/ops/cloudServer3p.log

注释：

curl  -s http://cloudServer1p:8530/v1/agent/services  通过调用consul接口获取consul注册的微服务然后作为参数传递给脚本去处理。

manageCloudService1p.py内容：

 # python json_format.py json_text
import os
import sys
import json
import smtplib
from email.mime.text import MIMEText

length = len(sys.argv)

def sendMail(name):
    mail_host = 'mail.163.com'
    mail_user = 'alert@163.com'
    mail_pass = 'test123'
    sender = 'alert@163.com'
    receivers = ['alert@163.com']
    message = MIMEText(name+' server check failure! i will start this server.','plain','utf-8')
    message['Subject'] = 'cloud server check'
    message['From'] = sender
    message['To'] = receivers[0]
    try:
        smtpObj = smtplib.SMTP()
        smtpObj.connect(mail_host,25)
        smtpObj.login(mail_user,mail_pass)
        smtpObj.sendmail(
        sender,receivers,message.as_string())
        smtpObj.quit()
        print('success')
    except smtplib.SMTPException as e:
        print('error',e)

if length > 1:
        try:
           jsonstr = sys.argv[1]
           jsonObj = json.loads(jsonstr)
           serverName=["gateway-service-9999","order-service-8020","portal-service-8080","product-service-8010"]
           realServerName=[]
           for key in jsonObj.keys():
               realServerName.append(key)
           for name in serverName:
               if name not in realServerName:
                   print(name+"is down")
                   if name == 'gateway-service-9999':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer1p -e serverName=restartGatewayService")
                   elif name == 'order-service-8020':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer1p -e serverName=restartOrderService")
                   elif name == 'portal-service-8080':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer1p -e serverName=restartPortalService")
                   elif name == 'product-service-8010':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer1p -e serverName=restartProductService")
                   else:
                        print(name+"not exist!")
               else:
                    print(name+"is up")
        except Exception:
           print("json parse error.")
else :
    print("argv's length is 1, no json text input.")

manageCloudService2p.py内容：

 # python json_format.py json_text
import os
import sys
import json
import smtplib
from email.mime.text import MIMEText

length = len(sys.argv)

def sendMail(name):
    mail_host = 'mail.163.com'
    mail_user = 'alert@163.com'
    mail_pass = 'test123'
    sender = 'alert@163.com'
    receivers = ['alert@163.com']
    message = MIMEText(name+' server check failure! i will start this server.','plain','utf-8')
    message['Subject'] = 'cloud server check'
    message['From'] = sender
    message['To'] = receivers[0]
    try:
        smtpObj = smtplib.SMTP()
        smtpObj.connect(mail_host,25)
        smtpObj.login(mail_user,mail_pass)
        smtpObj.sendmail(
        sender,receivers,message.as_string())
        smtpObj.quit()
        print('success')
    except smtplib.SMTPException as e:
        print('error',e)

if length > 1:
        try:
           jsonstr = sys.argv[1]
           jsonObj = json.loads(jsonstr)
           serverName=["gateway-service-9999","order-service-8020","portal-service-8080","product-service-8010"]
           realServerName=[]
           for key in jsonObj.keys():
               realServerName.append(key)
           for name in serverName:
               if name not in realServerName:
                   print(name+"is down")
                   if name == 'gateway-service-9999':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer2p -e serverName=restartGatewayService")
                   elif name == 'order-service-8020':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer2p -e serverName=restartOrderService")
                   elif name == 'portal-service-8080':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer2p -e serverName=restartPortalService")
                   elif name == 'product-service-8010':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer2p -e serverName=restartProductService")
                   else:
                        print(name+"not exist!")
               else:
                    print(name+"is up")
        except Exception:
           print("json parse error.")
else :
    print("argv's length is 1, no json text input.")

manageCloudService3p.py内容：

 # python json_format.py json_text
import os
import sys
import json
import smtplib
from email.mime.text import MIMEText

length = len(sys.argv)

def sendMail(name):
    mail_host = 'mail.163.com'
    mail_user = 'alert@163.com'
    mail_pass = 'test123'
    sender = 'alert@163.com'
    receivers = ['alert@163.com']
    message = MIMEText(name+' server check failure! i will start this server.','plain','utf-8')
    message['Subject'] = 'cloud server check'
    message['From'] = sender
    message['To'] = receivers[0]
    try:
        smtpObj = smtplib.SMTP()
        smtpObj.connect(mail_host,25)
        smtpObj.login(mail_user,mail_pass)
        smtpObj.sendmail(
        sender,receivers,message.as_string())
        smtpObj.quit()
        print('success')
    except smtplib.SMTPException as e:
        print('error',e)

if length > 1:
        try:
           jsonstr = sys.argv[1]
           jsonObj = json.loads(jsonstr)
           serverName=["gateway-service-9999","order-service-8020","portal-service-8080","product-service-8010"]
           realServerName=[]
           for key in jsonObj.keys():
               realServerName.append(key)
           for name in serverName:
               if name not in realServerName:
                   print(name+"is down")
                   if name == 'gateway-service-9999':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer3p -e serverName=restartGatewayService")
                   elif name == 'order-service-8020':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer3p -e serverName=restartOrderService")
                   elif name == 'portal-service-8080':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer3p -e serverName=restartPortalService")
                   elif name == 'product-service-8010':
                        sendMail(name)
                        os.system("ansible-playbook /etc/ansible/restartService.yml -e serverList=cloudServer3p -e serverName=restartProductService")
                   else:
                        print(name+"not exist!")
               else:
                    print(name+"is up")
        except Exception:
           print("json parse error.")
else :
    print("argv's length is 1, no json text input.")

restartService.yml内容如下：

---
- hosts: '{{ serverList }}'
  tasks:
   - name: restart server
     command: "/bin/bash /home/cloud/startService.sh {{serverName}}"
     register: result
   - name: show debug info
     debug: var=result.stdout verbosity=0

2. 在微服务节点上操作：

将 startService.sh 这个脚本分别拷贝到三个微服务节点的 /home/cloud/ 目录下面：

startService.sh 内容如下:

  #!/bin/bash
restartGatewayService()
{
    srevice_name="gateway-service"
    service_pid=`ps -ef|grep ${srevice_name} |grep -v task|grep prod |grep -v grep |awk '{print $2}'`
    if [ ! -n "$service_pid" ];then
      echo  "${srevice_name} is already stopped,i will start ${srevice_name} now!"
      /usr/bin/nohup java -jar -Xms512m -Xmx512m -Dserver.port=9999 -Dspring.profiles.active=prod -Dlogging.level.root=info /home/cloud/services/gateway-service.jar  >> /home/cloud/services/gateway-service.log &
      sleep 10
    else
      echo  "${srevice_name} is running,i will kill -15 ${srevice_name} and start it now!"
      kill -15 $service_pid
      sleep 10
     /usr/bin/nohup java -jar -Xms512m -Xmx512m -Dserver.port=9999 -Dspring.profiles.active=prod -Dlogging.level.root=info /home/cloud/services/gateway-service.jar  >> /home/cloud/services/gateway-service.log &
    fi
}
restartOrderService()
{
    srevice_name="order-service"
    service_pid=`ps -ef|grep ${srevice_name} |grep -v task|grep prod |grep -v grep |awk '{print $2}'`
    if [ ! -n "$service_pid" ];then
      echo  "${srevice_name} is already stopped,i will start ${srevice_name} now!"
      /usr/bin/nohup java -jar -Xms512m -Xmx512m -Dserver.port=8020 -Dspring.profiles.active=prod -Dlogging.level.root=info /home/cloud/services/order-service.jar  >> /home/cloud/services/order-service.log &
      sleep 10
    else
      echo  "${srevice_name} is running,i will kill -15 ${srevice_name} and start it now!"
      kill -15 $service_pid
      sleep 10
     /usr/bin/nohup java -jar -Xms512m -Xmx512m -Dserver.port=8020 -Dspring.profiles.active=prod -Dlogging.level.root=info /home/cloud/services/order-service.jar  >> /home/cloud/services/order-service.log &
    fi
}
restartPortalService()
{
    srevice_name="portal-service"
    service_pid=`ps -ef|grep ${srevice_name} |grep -v task|grep prod |grep -v grep |awk '{print $2}'`
    if [ ! -n "$service_pid" ];then
      echo  "${srevice_name} is already stopped,i will start ${srevice_name} now!"
      /usr/bin/nohup java -jar -Xms512m -Xmx512m -Dserver.port=8080 -Dspring.profiles.active=prod -Dlogging.level.root=info /home/cloud/services/portal-service.jar  >> /home/cloud/services/portal-service.log &
      sleep 10
    else
      echo  "${srevice_name} is running,i will kill -15 ${srevice_name} and start it now!"
      kill -15 $service_pid
      sleep 10
     /usr/bin/nohup java -jar -Xms512m -Xmx512m -Dserver.port=8080 -Dspring.profiles.active=prod -Dlogging.level.root=info /home/cloud/services/portal-service.jar  >> /home/cloud/services/portal-service.log &
    fi
}
restartProductService()
{
    srevice_name="product-service"
    service_pid=`ps -ef|grep ${srevice_name} |grep -v task|grep prod |grep -v grep |awk '{print $2}'`
    if [ ! -n "$service_pid" ];then
      echo  "${srevice_name} is already stopped,i will start ${srevice_name} now!"
      /usr/bin/nohup java -jar -Xms512m -Xmx512m -Dserver.port=8010 -Dspring.profiles.active=prod -Dlogging.level.root=info /home/cloud/services/product-service.jar  >> /home/cloud/services/product-service.log &
      sleep 10
    else
      echo  "${srevice_name} is running,i will kill -15 ${srevice_name} and start it now!"
      kill -15 $service_pid
      sleep 10
     /usr/bin/nohup java -jar -Xms512m -Xmx512m -Dserver.port=8010 -Dspring.profiles.active=prod -Dlogging.level.root=info /home/cloud/services/product-service.jar  >> /home/cloud/services/product-service.log &
    fi
}


restartAllService()
{
  restartGatewayService
  restartOrderService
  restartPortalService
  restartProductService
}


serviceStatus()
{
  echo  "service status as:"
  jps -l
}

case $1 in
  "all")
    echo  "restart all service!"
    restartAllService
    serviceStatus
    ;;
  "restartGatewayService")
    echo  "restart gateway service!"
    restartGatewayService
    serviceStatus
    ;;
  "restartOrderService")
    echo  "restart order service!"
    restartOrderService
    serviceStatus
    ;;
  "restartPortalService")
    echo  "restart portal service!"
    restartPortalService
    serviceStatus
    ;;
  "restartProductService")
    echo  "restart product service!"
    restartProductService
    serviceStatus
    ;;

  *)
    echo   "input parameter  error! USAGE: bash startService.sh all|one"
    ;;
esac

此方案已经在生产环境开始运行，运行效果测试有效，如有问题请及时联系博主。