haproxy Mycat集2---KeepAlived
KA 配两台 MASTER,BACKUP节点
安装Keepalived
1、下载安装依赖包
yum install -y wget make gcc openssl-devel popt-devel
2、下载、安装Keepalived
wget https://www.keepalived.org/software/keepalived-2.0.18.tar.gz
tar zxvf keepalived-2.0.18
cd keepalived-2.0.18
./configure --prefix=/usr/local/keepalived
make
make install
3、安装成功后做成服务模式。
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /keepalived-2.0.18/keepalived/etc/init.d/keepalived /etc/init.d
4、配置文件
mkdir -p /etc/keepalived/
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
chmod +x /etc/init.d/keepalived
vi /etc/keepalived/keepalived.conf
global_defs { router_id LVS_DEVEL }
vrrp_script chk_haproxy {
script "/etc/keepalived/chk.sh" //检查haproxy的脚本
interval 2 //每两秒检查一次
}
vrrp_instance VI_1 {
state MASTER //定义为MASTER节点
nopreempt //开启不抢占
interface eth0
virtual_router_id 51
priority 100 //开启了不抢占,所以此处优先级必须高于另一台
advert_int 1
authentication {
auth_type PASS
auth_pass abcd
}
virtual_ipaddress {
172.17.0.21 //配置VIP 当前DOCKER IP:172.17.0.20
}
track_script {
chk_haproxy //调用检查脚本
}
notify_backup "/etc/init.d/haproxy restart" //KA 启动Haproxy
notify_fault "/etc/init.d/haproxy stop"
}
5.chk.sh文件:
vi /etc/keepalived/chk.sh
#!/bin/bash
#
if [ $(ps -C haproxy --no-header | wc -l) -eq 0 ]; then
/etc/init.d/keepalived stop
fi
chmod +x /etc/keepalived/chk.sh
service keepalived start
参考:https://www.cnblogs.com/tae44/p/4717334.html https://www.cnblogs.com/kgdxpr/p/3325788.html