# 安装

yum install haproxy keepalived -y

# 配置 haproxy（master1,2配置相同）

# 修改配置文件
vi /etc/haproxy/haproxy.cfg
global
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

# 开启web页面
listen admin_status
    bind *:8000
    mode http
    stats uri /status

# 配置tcp转发
frontend  main *:16443
    mode tcp
    default_backend             k8s

# 配置后端端口
backend k8s
    balance     roundrobin
    mode tcp
    server  k8smaster01 192.168.241.191:6443 check
    server  k8smaster02 192.168.241.192:6443 check

# 启动haproxy
systemctl start haproxy && systemctl enable haproxy

# 配置keepalived

vi /etc/keepalived/keepalived.conf 
# 配置邮箱服务器
global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL_bak
   vrrp_skip_check_adv_addr
   vrrp_strict
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

# 配置监控检查脚本
# 用来做健康检查的，当时检查失败时会将 vrrp_instance 的 priority 减少相应的值。
vrrp_script check_haproxy {
    # 根据进程名称检测进程是否存活
    script "killall -0 haproxy"
    #【每个3秒检查一次；】
    interval 3
    # 【检测失败则权重-2；成功将不执行；
    # 可使用rpm -ql keepalived查询是否有样例文件可参看；】
    weight -2
    # 连续失败10次
    fall 10
    # 最少成功2次
    rise 2
}

# 配置虚拟ip
vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 51
    # 优先级高抢占虚拟IP，两台服务器优先级要不一致
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.241.190
    }
    # 检测脚本
    track_script {
        check_haproxy
    }
}


# 启动
systemctl start keepalived && systemctl status keepalived