. keepalived+haproxy

19.1 架构

主机	IP	软件
ha01	192.168.72.20 VIP 192.168.72.10	haproxy, keepalived
ha02	192.168.72.21	haproxy, keepalived
web1	192.168.72.22	nginx

19.2 规划

主机	IP	软件
web2	192.168.72.23	nginx
web3	192.168.72.24	nginx

19.3 安装

在主备上安装 haproxy 和 keepalived

dnf install haproxy keepalived -y

在三台web服务器上安装 nginx

dnf install nginx -y
echo "`hostname` - `hostname -I`" > /usr/share/nginx/html/inde.html
systemctl start nginx

19.4 配置proxy

[root@ha-proxy-master ~]# vim /etc/haproxy/haproxy.cfg
global_defs {log 127.0.0.1 local3 infomaxconn 4096uid nobodygid nobodydaemonnbproc 1
defaultslog globalmode httpmaxconn 2048retries 3option redispatchstats uri /haproxystats auth jock:123timeout connect 5000timeout client 50000timeout server 5000
frontend http-inbind 0.0.0.0:80mode httplog globaloption httplogoption httpcloseacl html url_reg -i \.html$use_backend html-server if htmldefault_backend html-server
backend html-servermode httpbalance roundrobinoption httpchk GET /index.htmlcookie SERVERID insert indirect nocacheserver http1 192.168.72.22:80 weight 1 cookie 3 check inter 2000 rise 2 fall2server http2 192.168.72.23:80 weight 1 cookie 4 check inter 2000 rise 2 fall2server http2 192.168.72.24:80 weight 1 cookie 5 check inter 2000 rise 2 fall2

将配置文件拷贝到backup服务器

[root@ha-proxy-master ~]# scp /etc/haproxy/haproxy.cfg
192.168.72.21:/etc/haproxy/

两台机器启动设置开机启动。

[root@ha-proxy-master ~]# systemctl start haproxy
[root@ha-proxy-master ~]# systemctl enable haproxy

19.5 配置keepalived

[root@ha-proxy-master ~]# vim /etc/keepalived/keepalived.conf
# 主
global_defs {router_id host-1
}
vrrp_script check_haproxy {script "killall -0 haproxy"interval 2
}
vrrp_instance HAProxy_1 {state MASTERinterface ens160virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}track_script {check_haproxy
}virtual_ipaddress {192.168.72.10/24 dev ens160}
}
global_defs {router_id host-2
}
vrrp_instance VI_1 {state BACKUPinterface ens160virtual_router_id 51priority 90advert_int 1authentication {auth_type PASSauth_pass 1111
}    virtual_ipaddress {192.168.72.10/24 dev ens160
}
}

启动：

[root@ha-proxy-master ~]# systemctl start keepalived

配置完成