====== HAproxy кластер ======

<cli>
sudo apt install haproxy keepalived -y
</cli>

<code=ini /etc/haproxy/haproxy.cfg>
...
frontend stats
    mode http
    bind *:8404
    stats enable
    stats uri /stats
    stats refresh 2s
    stats admin if LOCALHOST

frontend localnodes
        bind *:80
        mode tcp
        default_backend nodes

backend nodes
        mode tcp
        balance leastconn
        server web01 192.168.25.188:80 check inter 2s
        server web02 192.168.25.189:80 check inter 2s
</code>
<code=java /etc/keepalived/keepalived.conf>
vrrp_track_process track_haproxy {
    process haproxy
    delay 1
}
vrrp_instance VI_1 {
    state MASTER
#    state BACKUP
    interface eth1
    virtual_router_id 101
    priority 20
#    priority 10 
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1qaz2wsx
    }
    virtual_ipaddress {
        192.168.25.185
    }
    track_process {
        track_haproxy
    }
}

</code>
<cli>
systemctl restart keepalived.service
</cli>