公司nginx keepalived tomcat cxf 搭建高可用负载均衡实战系列1- keepalived的安装配置

Posted 2020-10-06 不甘平凡，叶育生

 

1，ip说明

 

vip	10.50.13.67
server1	10.50.13.68
server2	10.50.13.140

 

2，keepalived安装

keepalived通常与lvs或者nginx结合使用保证集群的高可用，keepalived的master会绑定一个vip用来对外服务并定期向backup发送消息，当backup接收不到消息时则会判定master已经挂掉，backup将升为master并且绑定vip继续对外提供服务，从而保证高可用。下面介绍keepalived的安装

安装依赖 openssl-devel popt-devel

yum install -y gcc openssl-devel popt-devel

 

 

下载 /keepalived-1.2.24.tar.gz

 wget http://www.keepalived.org/software/keepalived-1.2.24.tar.gz

 

tar zxvf keepalived-1.2.24.tar.gz

 

cd keepalived-1.2.24

 

./configure --prefix=/opt/wacos/aaatool/keepalived

 

make && make install

 

设置开机启动

cp /opt/wacos/aaatool/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

cp /opt/wacos/aaatool/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

 

cp /ut/server/keepalived-1.2.24/sbin/keepalived /usr/sbin/

 

cp /opt/wacos/aaatool/keepalived/sbin/keepalived /usr/sbin/

 

chmod 755 /etc/init.d/keepalived

 

keepalived启动会默认读取keepalived/keepalived.conf配置文件

mkdir /etc/keepalived

 拷贝keepalived.conf配置文件到/etc/keepalived/

 

 keepalived.conf配置文件如下

 

! Configuration File for keepalived

 

global_defs {

   router_id edu-proxy-02

}

 

vrrp_script chk_nginx {

    script "/etc/keepalived/nginx_check.sh"

    interval 2

    weight -20

}

 

vrrp_instance VI_1 {

    state BACKUP

    interface eth0

    virtual_router_id 51

    mcast_src_ip 10.50.13.68

    priority 90

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

 

    track_script {

        chk_nginx

    }

 

    virtual_ipaddress {

        10.50.13.67

    }

}

 

 

 启动 关闭 keepalived

 

service keepalived start[stop]

 

 

 

ip a查看是否绑定虚拟ip10.50.13.67

 

 

 3，备keepalived安装

 和说明主keepalived 过程一样，只是配置文件/etc/keepalived/keepalived。conf一处需要修改

 mcast_src_ip 10.50.13.140

 

4,测试高可用

关掉10.50.13.67的keepalived后，发现vip绑定到了10.50.13.140

重启10.50.13.67的keepalived，vip又重新绑定到了10.50.13.67