Kubernetes二进制部署——负载均衡部署（3）-创新互联
前言：
接上一篇多节点部署（2）部署负载均衡部署环境
负载均衡
Nginx1:192.168.13.128/24
Nginx2:192.168.13.129/24
Master节点
master1:192.168.13.131/24 kube-apiserver kube-controller-manager kube-scheduler etcd
master2:192.168.13.130/24 kube-apiserver kube-controller-manager kube-scheduler etcd
Node节点
node1:192.168.13.132/24 kubelet kube-proxy docker flannel etcd
node2:192.168.13.133/24 kubelet kube-proxy docker flannel etcd站在用户的角度思考问题，与客户深入沟通，找到东丰网站设计与东丰网站推广的解决方案，凭借多年的经验，让设计与互联网技术结合，创造个性化、用户体验好的作品，建站类型包括：成都做网站、成都网站建设、企业官网、英文网站、手机端网站、网站推广、域名注册、网页空间、企业邮箱。业务覆盖东丰地区。
负载均衡部署
1，在两台Nginx服务器上安装nginx服务
[root@nginx01 ~]# rz -E ##上传nginx脚本和keepalive配置文件
[root@nginx01 ~]# ls
keepalived.conf nginx.sh
[root@nginx01 ~]# systemctl stop firewalld.service ##关闭防火墙
[root@nginx01 ~]# setenforce 0vim nginx.sh ##nginx脚本
cat > /etc/yum.repos.d/nginx.repo << EOF
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
EOF
stream {
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 10.0.0.3:6443;
server 10.0.0.8:6443;
}
server {
listen 6443;
proxy_pass k8s-apiserver;
}
}[root@nginx01 ~]# vim /etc/yum.repos.d/nginx.repo ##配置nginx的yum源
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
[root@nginx01 ~]# yum list ##更新yum
[root@nginx01 ~]# yum install -y nginx ##下载Nginx2，修改两台nginx服务器的配置文件
[root@nginx01 ~]# vim /etc/nginx/nginx.conf
events {
worker_connections 1024;
} ##在此处下面添加四层转发配置
stream {
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 192.168.13.131:6443; ##master01地址
server 192.168.13.130:6443; ##master02地址
}
server {
listen 6443;
proxy_pass k8s-apiserver;
}
}
[root@nginx01 ~]# systemctl start nginx ##开启nginx服务
##可以修改/usr/share/nginx/html/index.html主页区分主master从backup
##浏览器查看两个nginx网站
3，在两台nginx上部署keepalived服务，并修改配置文件
[root@nginx01 ~]# yum install -y keepalived ##安装keepalived服务
[root@nginx01 ~]# cp keepalived.conf /etc/keepalived/keepalived.conf ##复制配置文件
[root@nginx01 ~]# vim /etc/keepalived/keepalived.conf ##主master的配置文件修改
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
# 邮件发送地址
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/nginx/check_nginx.sh" ##nginx检查脚本，需要自己去编辑的
}
vrrp_instance VI_1 {
state MASTER ##主服务
interface ens33
virtual_router_id 51 ## VRRP 路由 ID实例，每个实例是唯一的
priority 100 ## 优先级，备服务器设置 90
advert_int 1 ## 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS ##验证不需要修改，主从一致
auth_pass 1111
}
virtual_ipaddress {
192.168.13.100/24 ##虚拟ip地址
}
track_script {
check_nginx
}
}
[root@nginx02 ~]# vim /etc/keepalived/keepalived.conf ##备backup的配置文件修改
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
# 邮件发送地址
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/nginx/check_nginx.sh" ##nginx检查脚本
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 90 # 优先级，备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.13.100/24
}
track_script {
check_nginx
}
}
[root@nginx01 ~]# vim /etc/nginx/check_nginx.sh ##编辑nginx检查脚本
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")
if [ "$count" -eq 0 ];then
systemctl stop keepalived
fi
[root@nginx01 ~]# chmod +x /etc/nginx/check_nginx.sh ##给执行权限
[root@nginx01 ~]# systemctl start keepalived.service ##开启服务
[root@nginx01 ~]# ip a ##查看地址信息
inet 192.168.13.100/24 scope global secondary ens33 ##漂移地址在master上4，验证地址漂移
##在nginx01中关闭nginx服务，此时keepalived服务也关闭了（check_nginx.sh）
[root@nginx01 ~]# pkill nginx
##在nginx02中查看漂移地址
[root@nginx02 ~]# ip a ##此时13.100在nginx02上
##在nginx01上恢复nginx和keepalived服务，查看漂移地址
[root@nginx01 ~]# systemctl start nginx
[root@nginx01 ~]# systemctl start keepalived.service
[root@nginx01 ~]# ip a ##此时漂移地址又到了nginx01上
##用浏览器访问虚拟ip
5，在所有的node节点服务器上统一配置VIP
[root@node01 ~]# vim /opt/kubernetes/cfg/bootstrap.kubeconfig
server: https://192.168.13.100:6443
[root@node01 ~]# vim /opt/kubernetes/cfg/kubelet.kubeconfig
server: https://192.168.13.100:6443
[root@node01 ~]# vim /opt/kubernetes/cfg/kube-proxy.kubeconfig
server: https://192.168.13.100:6443
[root@node01 ~]# cd /opt/kubernetes/cfg/ ##切换到配置文件目录
[root@node01 cfg]# grep 100 * ##查看修改的情况
bootstrap.kubeconfig: server: https://192.168.13.100:6443
kubelet.kubeconfig: server: https://192.168.13.100:6443
kube-proxy.kubeconfig: server: https://192.168.13.100:6443
[root@node01 cfg]# systemctl restart kubelet.service ##重启两个服务
[root@node01 cfg]# systemctl restart kube-proxy.service
##在nginx01上查看访问日志
[root@nginx01 ~]# tail /var/log/nginx/k8s-access.log
192.168.13.132 k8s-apiserver - [10/Feb/2020:13:17:11 +0800] 502 0
192.168.13.132 k8s-apiserver - [10/Feb/2020:13:17:11 +0800] 502 0
192.168.13.132 k8s-apiserver - [10/Feb/2020:13:17:11 +0800] 502 0
192.168.13.133 k8s-apiserver - [10/Feb/2020:13:17:11 +0800] 502 0
192.168.13.133 k8s-apiserver - [10/Feb/2020:13:17:11 +0800] 502 06，在matser01上创建pod
[root@master01 ~]# kubectl get pods ##查看pod
No resources found.
[root@master01 ~]# kubectl run nginx --image=nginx ##创建pod
[root@master01 ~]# kubectl get pods ##查看pod状态是正在创建的状态
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-brjlj 0/1 ContainerCreating 0 86s
[root@master01 ~]# kubectl get pods ##此时pod是已经运行的状态
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-brjlj 1/1 Running 0 87s
[root@master01 ~]# kubectl logs nginx-dbddb74b8-brjlj ##此时日志文件不能查看
[root@master01 ~]# kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous
##提权后日志文件就可以查看了
[root@master01 ~]# kubectl get pods -o wide ##查看pod网络，此时pod容器分配到node01上
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
nginx-dbddb74b8-brjlj 1/1 Running 0 5m18s 172.17.45.2 192.168.13.132 7，在对应的网段node01上访问
[root@node01 cfg]# curl 172.17.45.2 ##此时就可以访问nginx信息
Welcome to nginx!
##用node01虚拟机的浏览器访问
8，此时在master01上查看日志文件
[root@master01 ~]# kubectl logs nginx-dbddb74b8-brjlj
172.17.45.1 - - [10/Feb/2020:05:29:23 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-"负载均衡部署完成，未完待续...
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