keepalived_sample.conf

# this is for haproxy1
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 101
    priority 101  # higher priority
    advert_int 1
    unicast_src_ip 192.168.3.122  # haproxy1 private ip
    unicast_peer {
        192.168.2.17  # haproxy2 private ip
    }
    authentication {
        auth_type PASS
        auth_pass password
    }
    virtual_ipaddress {
        192.168.4.130/17 # floating private ip
        45.xx.xx.xx/24   # floating public ip
    }
    notify_master "/bin/echo 'now master' > /tmp/keepalived.state"
    notify_backup "/bin/echo 'now backup' > /tmp/keepalived.state"
    notify_fault "/bin/echo 'now fault' > /tmp/keepalived.state"
    smtp_alert
}

# this is for haproxy2
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 101
    priority 100 # lower priority
    advert_int 1
    unicast_src_ip 192.168.2.17
    unicast_peer {
        192.168.3.122
    }
    authentication {
        auth_type PASS
        auth_pass password
    }
    virtual_ipaddress {
        192.168.4.130/17 # floating private ip
        45.xx.xx.xx/24   # floating public ip
    }
    notify_master "/bin/echo 'now master' > /tmp/keepalived.state"
    notify_backup "/bin/echo 'now backup' > /tmp/keepalived.state"
    notify_fault "/bin/echo 'now fault' > /tmp/keepalived.state"
    smtp_alert
}