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2016-05-08补充Keepalived内容
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Nginx-Keepalived-Install-And-Settings.md

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- JDK:**8u72**
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- Tomcat:**8.0.32**
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- 部署环境:
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- VIP:192.168.1.50
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- 第一台主机:Nginx 1 + Keepalived 1 + Tomcat 1 == 192.168.1.120(Master)
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- 第二台主机:Nginx 2 + Keepalived 2 + Tomcat 2 == 192.168.1.121(Backup)
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- 两台机子进行时间校准:[NTP(Network Time Protocol)介绍](NTP.md)
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- 第一台主机部署(第二台主机也是按着这样完全配置):
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- 虚拟 IP(VIP):192.168.1.50
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- 第一台主机:Nginx 1 + Keepalived 1 == 192.168.1.120(Master)
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- 第二台主机:Nginx 2 + Keepalived 2 == 192.168.1.121(Backup)
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- 第三台主机:Tomcat 1 == 192.168.1.122(Web 1)
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- 第四台主机:Tomcat 2 == 192.168.1.123(Web 2)
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- 所有机子进行时间校准:[NTP(Network Time Protocol)介绍](NTP.md)
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- 第三、第四台主机部署:
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- JDK 的安装:[JDK 安装](JDK-Install.md)
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- Tomcat 的安装:[Tomcat 安装和配置、优化](Tomcat-Install-And-Settings.md)
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- 第一台主机部署(第二台主机也是按着这样完全配置):
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- Nginx 的安装:[Nginx 安装和配置](Nginx-Install-And-Settings.md)
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- 添加虚拟 IP:
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- 复制一个网卡信息:`sudo cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0`
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- 启动服务:`service keepalived start`
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- 加入随机启动:`chkconfig keepalived on`
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- 第一台主机配置:
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- ``
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- ``
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- 健康监测脚本:``
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- Keepalived 配置文件编辑:``
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- ``
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- ``
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- ``
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- 第二台主机配置:
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### 高可用测试
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- 模拟 Keepalived 挂掉
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- 关闭 Master 主机的 Keepalived,查看 Master 和 Backup 两台主机的对应日志:`cat /var/log/messages`
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- 重新开启 Master 主机的 Keepalived,查看 Master 和 Backup 两台主机的对应日志:`cat /var/log/messages`
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- 模拟 Nginx 挂掉
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- 关闭 Master 主机的 Nginx,查看 Master 和 Backup 两台主机的对应日志:`cat /var/log/messages`
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- 重新开启 Master 主机的 Nginx,查看 Master 和 Backup 两台主机的对应日志:`cat /var/log/messages`
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- 完善脚本,增加 Nginx 挂掉后自动重启脚本
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## 资料

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