相关内容：

Kubernetes部署（一）：架构及功能说明 Kubernetes部署（二）：系统环境初始化 Kubernetes部署（三）：CA证书制作 Kubernetes部署（四）：ETCD集群部署 Kubernetes部署（五）：Haproxy、Keppalived部署 Kubernetes部署（六）：Master节点部署 Kubernetes部署（七）：Node节点部署 Kubernetes部署（八）：Flannel网络部署 Kubernetes部署（九）：CoreDNS、Dashboard、Ingress部署 Kubernetes部署（十）：储存之glusterfs和heketi部署 Kubernetes部署（十一）：管理之Helm和Rancher部署 Kubernetes部署（十二）：helm部署harbor企业级镜像仓库

部署haproxy

1. 安装haproxy

[root@node-01 ~]# yum install haproxy -y

2. 配置内核转发

基于NAT模式的负载均衡器都需要打开系统转发功能

[root@node-01 ~]# cat >>/etc/sysctl.conf<<EOF
net.ipv4.ip_forward = 1
net.ipv4.ip_nonlocal_bind = 1
EOF
[root@node-01 ~]# sysctl -p

3. 日志配置

编辑/etc/rsyslog.conf增加如下配置

cat >>/etc/rsyslog.conf <<EOF
#Haproxy
local0.* /var/log/haproxy.log
EOF

vim /etc/rsyslog.conf +15   #取消配置文件注释
$ModLoad imudp
$UDPServerRun 514

编辑/etc/sysconfig/rsyslog

[root@node-01 ~]# tail -1 /etc/sysconfig/rsyslog 
SYSLOGD_OPTIONS="-c 2 -m 0 -r -x"
#重启rsyslog服务
systemctl restart rsyslog

在node-01和node-02执行相同操作，注意修改部分配置的ip地址

4. haproxy配置

node-01配置和node-2配置一样

[root@node-01 ~]# vim /etc/haproxy/haproxy.cfg
global
        chroot  /var/lib/haproxy
        daemon
        group haproxy
        user haproxy
        log 127.0.0.1:514 local0 warning
        pidfile /var/lib/haproxy.pid
        maxconn 20000
        spread-checks 3
        nbproc 8

defaults
        log     global
        mode    tcp
        retries 3
        option redispatch

listen https-apiserver
        bind 10.31.90.200:6443
        mode tcp
        balance roundrobin
        timeout server 15s
        timeout connect 15s

        server apiserver01 10.31.90.201:6443 check port 6443 inter 5000 fall 5
        server apiserver02 10.31.90.202:6443 check port 6443 inter 5000 fall 5
        server apiserver03 10.31.90.203:6443 check port 6443 inter 5000 fall 5

listen http-apiserver
        bind 10.31.90.200:8080
        mode tcp
        balance roundrobin
        timeout server 15s
        timeout connect 15s

        server apiserver01 10.31.90.201:8080 check port 8080 inter 5000 fall 5
        server apiserver02 10.31.90.202:8080 check port 8080 inter 5000 fall 5
        server apiserver03 10.31.90.203:8080 check port 8080 inter 5000 fall 5

5. 启动服务

[root@node-01 ~]# systemctl start haproxy.service  
[root@node-01 ~]# systemctl status haproxy.service

部署Keepalived

1. 安装keepalived

[root@node-01 k8s]# tar zxf keepalived-2.0.10.tar.gz 
[root@node-01 k8s]# cd keepalived-2.0.10/
[root@node-01 keepalived-2.0.10]# ./configure 
[root@node-01 keepalived-2.0.10]# make -j2 && make install
[root@node-01 keepalived-2.0.10]#mkdir /etc/keepalived
[root@node-01 keepalived-2.0.10]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
[root@node-01 keepalived-2.0.10]# cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

2. 日志配置

修改/etc/sysconfig/keepalived

[root@node-01 keepalived-2.0.10]# vim /etc/sysconfig/keepalived 
KEEPALIVED_OPTIONS="-D -d -S 1"

cat >>/etc/rsyslog.conf <<EOF
#keepalived
local1.* /var/log/keepalived.log
EOF

#重启rsyslog服务
systemctl restart rsyslog

3. keepalived配置文件

node-01配置文件

[root@node-01 ~]# vim /etc/keepalived/keepalived.conf 
! Configuration File for keepalived

global_defs {
   notification_email {
        feng110498@163.com
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_1
}
                                                     
vrrp_instance VI_1 {
    state MASTER          
    interface eth0
    lvs_sync_daemon_inteface eth0
    virtual_router_id 50
    advert_int 1
    priority 100         
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      10.31.90.200/24
    }
}

node-02配置文件

[root@node-02 keepalived-2.0.10]# cat /etc/keepalived/keepalived.conf 
! Configuration File for keepalived

global_defs {
   notification_email {
        feng110498@163.com
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_2
}
                                                     
vrrp_instance VI_1 {
    state MASTER     
    interface eth0
    lvs_sync_daemon_inteface eth0
    virtual_router_id 50
    advert_int 1
    priority 90         
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      10.31.90.200/24
    }
}

至此haproxy和keepalived部署完成，可以停止其中一台的keepalived服务器，用ip add show eth0查看VIP的漂浮状态，如果能正常转移就成功了。

#node-01
[root@node-01 ~]# ip add show eth0                
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:50:56:82:64:70 brd ff:ff:ff:ff:ff:ff
    inet 10.31.90.201/24 brd 10.31.90.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet 10.31.90.200/24 scope global secondary eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:fe82:6470/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

#node-02
[root@node-02 ~]# ip add show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:50:56:82:dd:7d brd ff:ff:ff:ff:ff:ff
    inet 10.31.90.202/24 brd 10.31.90.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:fe82:dd7d/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

后续会陆续更新所有的安装文档，如果你觉得我写的不错，希望大家多多关注点赞，非常感谢！