kubernetes部署haproxy、keepalived为kube-apiserver做集群

也可以用nginx、keepalived做负载均衡，看大家的需求。

# yum -y install haproxy keepalived

haproxy的配置文件（三台一样）：

cat > /etc/haproxy/haproxy.cfg <<EOF
global
    log /dev/log    local0
    log /dev/log    local1 notice
    chroot /var/lib/haproxy
    stats socket /var/run/haproxy-admin.sock mode 660 level admin
    stats timeout 30s
    user haproxy
    group haproxy
    daemon
    nbproc 1

defaults
    log     global
    timeout connect 5000
    timeout client  10m
    timeout server  10m

listen  admin_stats
    bind 0.0.0.0:10080
    mode http
    log 127.0.0.1 local0 err
    stats refresh 30s
    stats uri /status
    stats realm welcome login Haproxy
    stats auth admin:123456
    stats hide-version
    stats admin if TRUE

listen kube-master
    bind 0.0.0.0:8443
    mode tcp
    option tcplog
    balance source
    server 192.168.111.10 192.168.111.10:6443 check inter 2000 fall 2 rise 2 weight 1
    server 192.168.111.11 192.168.111.11:6443 check inter 2000 fall 2 rise 2 weight 1
    server 192.168.111.12 192.168.111.12:6443 check inter 2000 fall 2 rise 2 weight 1
EOF

启动haproxy：

# for SERVICES in haproxy;do systemctl enable $SERVICES; systemctl restart  $SERVICES; systemctl status $SERVICES; done

keepalived配置文件（1主）：

cat > /etc/keepalived/keepalived.conf <<EOF
global_defs {
    router_id lb-master-105
}

vrrp_script check-haproxy {
    script "killall -0 haproxy"
    interval 5
    weight -30
}

vrrp_instance VI-kube-master {
    state MASTER
    priority 120
    dont_track_primary
    interface ens33
    virtual_router_id 68
    advert_int 3
    track_script {
        check-haproxy
    }
    virtual_ipaddress {
        192.168.111.9
    }
}
EOF

keepalived配置文件（2备）：

cat > /etc/keepalived/keepalived.conf <<EOF
global_defs {
    router_id lb-backup-105
}

vrrp_script check-haproxy {
    script "killall -0 haproxy"
    interval 5
    weight -30
}

vrrp_instance VI-kube-master {
    state BACKUP
    priority 110
    dont_track_primary
    interface ens33
    virtual_router_id 68
    advert_int 3
    track_script {
        check-haproxy
    }
    virtual_ipaddress {
        192.168.111.9
    }
}
EOF

启动keepalived：

for SERVICES in keepalived;do systemctl enable $SERVICES; systemctl restart  $SERVICES; systemctl status $SERVICES; done