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在我们搭建多节点部署时，多个master同时运行工作，在处理工作问题时总是使用同一个master完成工作，当master服务器面对多个请求任务时，处理速度就会变慢，同时其余的master服务器不处理请求也是一种资源的浪费，这个时候我们就考虑到做负载均衡服务
[root@master01 kubeconfig]# scp -r /opt/kubernetes/ root@192.168.80.11:/opt //直接复制kubernetes目录到master02
The authenticity of host '192.168.80.11 (192.168.80.11)' can't be established.
ECDSA key fingerprint is SHA256:Ih0NpZxfLb+MOEFW8B+ZsQ5R8Il2Sx8dlNov632cFlo.
ECDSA key fingerprint is MD5:a9:ee:e5:cc:40:c7:9e:24:5b:c1:cd:c1:7b:31:42:0f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.80.11' (ECDSA) to the list of known hosts.
root@192.168.80.11's password:
token.csv 100% 84 61.4KB/s 00:00
kube-apiserver 100% 929 1.6MB/s 00:00
kube-scheduler 100% 94 183.2KB/s 00:00
kube-controller-manager 100% 483 969.2KB/s 00:00
kube-apiserver 100% 184MB 106.1MB/s 00:01
kubectl 100% 55MB 85.9MB/s 00:00
kube-controller-manager 100% 155MB 111.9MB/s 00:01
kube-scheduler 100% 55MB 115.8MB/s 00:00
ca-key.pem 100% 1675 2.7MB/s 00:00
ca.pem 100% 1359 2.6MB/s 00:00
server-key.pem 100% 1679 2.5MB/s 00:00
server.pem 100% 1643 2.7MB/s 00:00
[root@master01 kubeconfig]# scp /usr/lib/systemd/system/{kube-apiserver,kube-controller-manager, kube-scheduler}.service root@192.168.80.11:/usr/lib/systemd/system //复制master中的三个组件启动脚本
root@192.168.80.11's password:
kube-apiserver.service 100% 282 274.4KB/s 00:00
kube-controller-manager.service 100% 317 403.5KB/s 00:00
kube-scheduler.service 100% 281 379.4KB/s 00:00
[root@master01 kubeconfig]# scp -r /opt/etcd/ root@192.168.80.11:/opt/ //特别注意：master02一定要有 etcd证书，否则apiserver服务无法启动 拷贝master01上已有的etcd证书给master02使用
root@192.168.80.11's password:
etcd 100% 509 275.7KB/s 00:00
etcd 100% 18MB 95.3MB/s 00:00
etcdctl 100% 15MB 75.1MB/s 00:00
ca-key.pem 100% 1679 941.1KB/s 00:00
ca.pem 100% 1265 1.6MB/s 00:00
server-key.pem 100% 1675 2.0MB/s 00:00
server.pem 100% 1338 1.5MB/s 00:00[root@master02 ~]# systemctl stop firewalld.service //关闭防火墙
[root@master02 ~]# setenforce 0 //关闭selinux
[root@master02 ~]# vim /opt/kubernetes/cfg/kube-apiserver //更改文件
...
--etcd-servers=https://192.168.80.12:2379,https://192.168.80.13:2379,https://192.168.80.14:2379 \
--bind-address=192.168.80.11 \ //更改IP地址
--secure-port=6443 \
--advertise-address=192.168.80.11 \ //更改IP地址
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
...
:wq
[root@master02 ~]# systemctl start kube-apiserver.service //启动apiserver服务
[root@master02 ~]# systemctl enable kube-apiserver.service //设置开机自启
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/ systemd/system/kube-apiserver.service.
[root@master02 ~]# systemctl start kube-controller-manager.service //启动controller-manager
[root@master02 ~]# systemctl enable kube-controller-manager.service //设置开机自启
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service to /usr/lib/systemd/system/kube-controller-manager.service.
[root@master02 ~]# systemctl start kube-scheduler.service //启动scheduler
[root@master02 ~]# systemctl enable kube-scheduler.service //设置开机自启
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-scheduler.service to /usr/lib/ systemd/system/kube-scheduler.service.
[root@master02 ~]# vim /etc/profile //编辑添加环境变量
...
export PATH=$PATH:/opt/kubernetes/bin/
:wq
[root@master02 ~]# source /etc/profile //重新执行
[root@master02 ~]# kubectl get node //查看节点信息
NAME STATUS ROLES AGE VERSION
192.168.80.13 Ready <none> 146m v1.12.3
192.168.80.14 Ready <none> 144m v1.12.3 //多master配置成功lb01、lb02同步操作keepalived服务配置文件下载 提取码：fkoh
[root@lb01 ~]# systemctl stop firewalld.service
[root@lb01 ~]# setenforce 0
[root@lb01 ~]# vim /etc/yum.repos.d/nginx.repo //配置nginx服务yum源
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
:wq
[root@lb01 yum.repos.d]# yum list //重新加载yum
已加载插件：fastestmirror
base | 3.6 kB 00:00:00
extras | 2.9 kB 00:00:00
...
[root@lb01 yum.repos.d]# yum install nginx -y //安装nginx服务
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.163.com
...
[root@lb01 yum.repos.d]# vim /etc/nginx/nginx.conf //编辑nginx配置文件
...
events {
worker_connections 1024;
}
stream { //添加四层转发模块
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 192.168.80.12:6443; //注意IP地址
server 192.168.80.11:6443;
}
server {
listen 6443;
proxy_pass k8s-apiserver;
}
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
...
:wq
[root@lb01 yum.repos.d]# systemctl start nginx //启动nginx服务 可以在浏览器中访问测试nginx服务
[root@lb01 yum.repos.d]# yum install keepalived -y //安装keepalived服务
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.163.com
...
[root@lb01 yum.repos.d]# mount.cifs //192.168.80.2/shares/K8S/k8s02 /mnt/ //挂载宿主机目录
Password for root@//192.168.80.2/shares/K8S/k8s02:
[root@lb01 yum.repos.d]# cp /mnt/keepalived.conf /etc/keepalived/keepalived.conf //复制准备好的 keepalived配置文件覆盖源配置文件
cp：是否覆盖"/etc/keepalived/keepalived.conf"？ yes
[root@lb01 yum.repos.d]# vim /etc/keepalived/keepalived.conf //编辑配置文件
...
vrrp_script check_nginx {
script "/etc/nginx/check_nginx.sh" //注意脚本位置修改
}
vrrp_instance VI_1 {
state MASTER
interface ens33 //注意网卡名称
virtual_router_id 51 //VRRP 路由 ID实例，每个实例是唯一的
priority 100 //优先级，备服务器设置 90
advert_int 1 //指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.80.100/24 //飘逸地址
}
track_script {
check_nginx
}
}
//删除下面所有内容
:wqlb02服务器keepalived配置文件修改
[root@lb02 ~]# vim /etc/keepalived/keepalived.conf
...
vrrp_script check_nginx {
script "/etc/nginx/check_nginx.sh" //注意脚本位置修改
}
vrrp_instance VI_1 {
state BACKUP //修改角色为backup
interface ens33 //网卡名称
virtual_router_id 51 //VRRP 路由 ID实例，每>个实例是唯一的
priority 90 //优先级，备服务器设置 90
advert_int 1 //指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.80.100/24 //虚拟IP地址
}
track_script {
check_nginx
}
}
//删除下面所有内容
:wqlb01、lb02同步操作
[root@lb01 yum.repos.d]# vim /etc/nginx/check_nginx.sh //编辑判断nginx状态脚本
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")
if [ "$count" -eq 0 ];then
systemctl stop keepalived
fi
:wq
chmod +x /etc/nginx/check_nginx.sh //添加脚本执行权限
[root@lb01 yum.repos.d]# systemctl start keepalived //启动服务[root@lb01 ~]# ip a //查看地址信息
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:e9:04:ba brd ff:ff:ff:ff:ff:ff
inet 192.168.80.19/24 brd 192.168.80.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.80.100/24 scope global secondary ens33 //虚拟地址成功配置
valid_lft forever preferred_lft forever
inet6 fe80::c3ab:d7ec:1adf:c5df/64 scope link
valid_lft forever preferred_lft forever[root@lb02 ~]# ip a //查看地址信息
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:7d:c7:ab brd ff:ff:ff:ff:ff:ff
inet 192.168.80.20/24 brd 192.168.80.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::cd8b:b80c:8deb:251f/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::c3ab:d7ec:1adf:c5df/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever //没有虚拟IP地址 lb02属于备用服务[root@lb01 ~]# systemctl stop nginx.service
[root@lb01 nginx]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:e9:04:ba brd ff:ff:ff:ff:ff:ff
inet 192.168.80.19/24 brd 192.168.80.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::c3ab:d7ec:1adf:c5df/64 scope link
valid_lft forever preferred_lft forever
[root@lb02 ~]# ip a //在lb02服务器查看
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:7d:c7:ab brd ff:ff:ff:ff:ff:ff
inet 192.168.80.20/24 brd 192.168.80.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.80.100/24 scope global secondary ens33 //漂移地址转移到lb02上
valid_lft forever preferred_lft forever
inet6 fe80::cd8b:b80c:8deb:251f/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::c3ab:d7ec:1adf:c5df/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever[root@lb01 nginx]# systemctl start nginx
[root@lb01 nginx]# systemctl start keepalived.service
[root@lb01 nginx]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:e9:04:ba brd ff:ff:ff:ff:ff:ff
inet 192.168.80.19/24 brd 192.168.80.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.80.100/24 scope global secondary ens33 //漂移地址被抢占回来 因为配置了优先级
valid_lft forever preferred_lft forever
inet6 fe80::c3ab:d7ec:1adf:c5df/64 scope link
valid_lft forever preferred_lft forever[root@node01 ~]# vim /opt/kubernetes/cfg/bootstrap.kubeconfig
...
server: https://192.168.80.100:6443
...
:wq
[root@node01 ~]# vim /opt/kubernetes/cfg/kubelet.kubeconfig
...
server: https://192.168.80.100:6443
...
:wq
[root@node01 ~]# vim /opt/kubernetes/cfg/kube-proxy.kubeconfig
...
server: https://192.168.80.100:6443
...
:wq
[root@node01 ~]# systemctl restart kubelet.service //重启服务
[root@node01 ~]# systemctl restart kube-proxy.service[root@lb01 nginx]# tail /var/log/nginx/k8s-access.log
192.168.80.13 192.168.80.12:6443 - [11/Feb/2020:15:23:52 +0800] 200 1118
192.168.80.13 192.168.80.11:6443 - [11/Feb/2020:15:23:52 +0800] 200 1119
192.168.80.14 192.168.80.12:6443 - [11/Feb/2020:15:26:01 +0800] 200 1119
192.168.80.14 192.168.80.12:6443 - [11/Feb/2020:15:26:01 +0800] 200 1120[root@master01 ~]# kubectl run nginx --image=nginx //创建pod节点
kubectl run --generator=deployment/apps.v1beta1 is DEPRECATED and will be removed in a future version. Use kubectl create instead.
deployment.apps/nginx created
[root@master01 ~]# kubectl get pods //查看pod信息
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-sdcpl 1/1 Running 0 33m //创建成功
[root@master01 ~]# kubectl logs nginx-dbddb74b8-sdcpl //查看日志信息
Error from server (Forbidden): Forbidden (user=system:anonymous, verb=get, resource=nodes, subresource=proxy) ( pods/log nginx-dbddb74b8-sdcpl) //出报错
[root@master01 ~]# kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous //解决日志报错问题
clusterrolebinding.rbac.authorization.k8s.io/cluster-system-anonymous created
[root@master01 ~]# kubectl logs nginx-dbddb74b8-sdcpl //再次查看日志
[root@master01 ~]# //这个时候没有访问，所有日志没有显示日志信息在node节点中访问nginx网页
[root@master01 ~]# kubectl get pods -o wide //先在master01节点上查看pod网络信息
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
nginx-dbddb74b8-sdcpl 1/1 Running 0 38m 172.17.33.2 192.168.80.14 <none>
[root@node01 ~]# curl 172.17.33.2 //在node节点上操作可以直接访问
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h2>Welcome to nginx!</h2>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>[root@master01 ~]# kubectl logs nginx-dbddb74b8-sdcpl
172.17.12.0 - - [12/Feb/2020:06:45:54 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-" //出现访问信息免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。