Linux学习笔记5月21日任务

18.2 keepalived介绍

18.3/18.4/18.5 用keepalived配置高可用集群

#yum install -y keepalived

#yum install -y nginx

编辑配置文件#vim /etc/keepalived/keepalived.conf

清空配置文件#> !$

编辑配置文件#vim /etc/keepalived/keepalived.conf复制提供的配置内容进来，保存

编辑监控脚本#vim /usr/local/sbin/check_ng.sh

#chmod 755 /usr/local/sbin/check_ng.sh

启动服务 #systemctl start keepalived

查看#ps aux | grep keep 

查看nginx服务#ps aux | grep nginx

停止nginx服务#/etc/init.d/nginx stop

查看nginx服务#！ps

nginx服务自动起来了

查看日志文件#less /var/log/messages

可以看到日志中服务的启动停止情况

查看IP配置#ip add  //ifconfig是查看不到的

查看iptables规则#iptables -nvl

关闭防火墙#systemctl stop firewalld

查看防火墙#getenforce

关闭selinux，#setenforce 0

备用主机设置

编辑配置文件#vim /etc/keepalived/keepalived.conf

编辑监控脚本#vim /usr/local/sbin/check_ng.sh

#chmod 755 /usr/local/sbin/check_ng.sh

启动服务 #systemctl start keepalived

#systemctl stop keepalived

#systemctl start keepalived

扩展

heartbeat和keepalived比较http://blog.csdn.net/yunhua_lee/article/details/9788433

DRBD工作原理和配置   http://502245466.blog.51cto.com/7559397/1298945

mysql+keepalived http://lizhenliang.blog.51cto.com/7876557/1362313

Linux学习笔记5月21日任务

原文：http://blog.51cto.com/12059818/2124334