长沙建设公司网站/小程序搭建
目录
- 前提
- master02部署
- 前端负载nginx搭建
- 测试
- node IP指向VIP地址
- 测试方法负载
前提
多节点在单节点的基础上进行
资源规划
| 名称 | 主机名 | IP地址 |
|---|---|---|
| ks8-master01 | master | 20.0.0.10/24 |
| ks8-master02 | master02 | 20.0.0.40/24 |
| node01 | node01 | 20.0.0.20/24 |
| node02 | node02 | 20.0.0.30/24 |
| nginx-master | nginx-master | 20.0.0.40/24 |
| nginx-backup | nginx-backup | 20.0.0.50/24 |
| VIP地址 | 20.0.0.100/24 |
master02部署
1、将master01的配置信息输出到master02上
[root@master kubeconfig]# scp -r /opt/kubernetes/ root@20.0.0.40:/opt/
The authenticity of host '20.0.0.40 (20.0.0.40)' can't be established.
ECDSA key fingerprint is SHA256:3YC4ehaBnUbIovfc6ha74KIHn4KPTl4hXHvXgZZX4J0.
ECDSA key fingerprint is MD5:f9:36:e7:e0:99:70:ba:c0:ba:46:85:58:6f:60:2c:70.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '20.0.0.40' (ECDSA) to the list of known hosts.
root@20.0.0.40's password:
token.csv 100% 84 102.3KB/s 00:00
kube-apiserver 100% 909 1.3MB/s 00:00
kube-scheduler 100% 94 161.6KB/s 00:00
kube-controller-manager 100% 483 842.0KB/s 00:00
kube-apiserver 100% 184MB 93.6MB/s 00:01
kubectl 100% 55MB 94.6MB/s 00:00
kube-controller-manager 100% 155MB 97.4MB/s 00:01
kube-scheduler 100% 55MB 97.3MB/s 00:00
admin-key.pem 100% 1679 1.9MB/s 00:00
admin.pem 100% 1399 1.9MB/s 00:00
ca-key.pem 100% 1675 3.7MB/s 00:00
ca.pem 100% 1359 3.0MB/s 00:00
kube-proxy-key.pem 100% 1679 3.9MB/s 00:00
kube-proxy.pem 100% 1403 3.2MB/s 00:00
server-key.pem 100% 1675 3.7MB/s 00:00
server.pem 100% 1643 3.9MB/s 00:00
2、master01复制启动文件到master02中
[root@master kubeconfig]# scp /usr/lib/systemd/system/{kube-apiserver,kube-controller-manager,kube-scheduler}.service root@20.0.0.40:/usr/lib/systemd/system/
root@20.0.0.40's password:
kube-apiserver.service 100% 282 509.4KB/s 00:00
kube-controller-manager.service 100% 317 706.6KB/s 00:00
kube-scheduler.service 100% 281 616.3KB/s 00:00
3、master02修改kube-apiserver IP地址指向自己
[root@master02 ~]# vim /opt/kubernetes/cfg/kube-apiserver
--bind-address=20.0.0.40 \ #修改为自己主机IP地址--advertise-address=20.0.0.40 \ #修改为自己主机IP地址
4、将master01的etcd证书复制到master02上面
[root@master kubeconfig]# scp -r /opt/etcd/ root@20.0.0.40:/opt/
root@20.0.0.40's password:
etcd 100% 481 88.9KB/s 00:00
etcd 100% 18MB 88.8MB/s 00:00
etcdctl 100% 15MB 92.6MB/s 00:00
ca-key.pem 100% 1679 899.3KB/s 00:00
ca.pem 100% 1265 490.2KB/s 00:00
server-key.pem 100% 1679 2.2MB/s 00:00
server.pem 100% 1338 1.2MB/s 00:00
5、启动apiserver、scheduler、controller-manager
[root@master02 ~]# systemctl start kube-apiserver.service
[root@master02 ~]# systemctl enable kube-apiserver.service
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-scheduler.service
[root@master02 ~]# systemctl enable kube-scheduler.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-scheduler.service to /usr/lib/systemd/system/kube-scheduler.service.[root@master02 ~]# systemctl start kube-controller-manager.service
[root@master02 ~]# systemctl enable kube-controller-manager.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service to /usr/lib/systemd/system/kube-controller-manager.service.
6、添加环境变量
[root@master02 ~]# vim /etc/profile
export PATH=$PATH:/opt/kubernetes/bin/ #增加[root@master02 ~]# source /etc/profile #加载环境变量
7、查看群集状态
[root@master02 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
20.0.0.20 Ready <none> 64m v1.12.3
20.0.0.30 Ready <none> 14m v1.12.3
前端负载nginx搭建
nginx-master配置
1、设置nginx源
[root@nginx-master ~]# vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
2、安装nginx
[root@nginx-master ~]# yum -y install nginx
3、修改nginx配置文件代理后端master
[root@nginx-master ~]# vim /etc/nginx/nginx.conf
events {worker_connections 1024;
}
增加下面内容
stream {log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';access_log /var/log/nginx/k8s-access.log main;upstream k8s-apiserver {server 20.0.0.10:6443;server 20.0.0.40:6443;}server {listen 6443;proxy_pass k8s-apiserver;}}
4、检查语法
[root@nginx-master ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
5、启动nginx
[root@nginx-master ~]# systemctl start nginx.service
[root@nginx-master ~]# systemctl enable nginx.service
Created symlink from /etc/systemd/system/multi-user.target.wants/nginx.service to /usr/lib/systemd/system/nginx.service.
6、安装keepalived
[root@nginx-master ~]# yum -y install keepalived
7、修改keepalived配置文件
[root@nginx-master ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs {# 接收邮件地址notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}# 邮件发送地址notification_email_from Alexandre.Cassen@firewall.locsmtp_server 127.0.0.1smtp_connect_timeout 30router_id NGINX_MASTER
}vrrp_script check_nginx {script "/etc/nginx/nginx.sh"
}vrrp_instance VI_1 {state MASTERinterface ens33virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的priority 100 # 优先级，备服务器设置 90advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {20.0.0.100/24}track_script {check_nginx}
}
8、创建nginx健康检查脚本
[root@nginx-master ~]# vim /etc/nginx/nginx.sh
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")if [ "$count" -eq 0 ];thensystemctl stop keepalived
fi
9、给脚本加执行权限
[root@nginx-master ~]# chmod +x /etc/nginx/nginx.sh
10、启动keepalived
[root@nginx-master ~]# systemctl start keepalived.service
[root@nginx-master ~]# systemctl enable keepalived.service
nginx-backup配置
1、设置nginx源
[root@nginx-backup ~]# vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
2、安装nginx
[root@nginx-backup ~]# yum -y install nginx
3、修改nginx配置文件代理后端master
[root@nginx-master ~]# vim /etc/nginx/nginx.conf
events {worker_connections 1024;
}
增加下面内容
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 20.0.0.10:6443;server 20.0.0.40:6443;}server {listen 6443;proxy_pass k8s-apiserver;}}
4、检查语法
[root@nginx-master ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
5、启动nginx
[root@nginx-master ~]# systemctl start nginx.service
[root@nginx-master ~]# systemctl enable nginx.service
Created symlink from /etc/systemd/system/multi-user.target.wants/nginx.service to /usr/lib/systemd/system/nginx.service.
6、安装keepalived
[root@nginx-backup ~]# yum -y install keepalived
7、修改keepalived配置文件
[root@nginx-backup ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs {# 接收邮件地址notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}# 邮件发送地址notification_email_from Alexandre.Cassen@firewall.locsmtp_server 127.0.0.1smtp_connect_timeout 30router_id NGINX_MASTER
}vrrp_script check_nginx {script "/etc/nginx/nginx.sh"
}vrrp_instance VI_1 {state BACKUPinterface ens33virtual_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 90advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {20.0.0.100/24}track_script {check_nginx}
}
8、创建nginx健康检查脚本
[root@nginx-backup ~]# vim /etc/nginx/nginx.sh
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")if [ "$count" -eq 0 ];thensystemctl stop keepalived
fi
9、给脚本加执行权限
[root@nginx-backup ~]# chmod +x /etc/nginx/nginx.sh
10、启动keepalived
[root@nginx-backup ~]# systemctl start keepalived.service
[root@nginx-backup ~]# systemctl enable keepalived.service
测试
测试漂移地址
1、查看IP地址
[root@nginx-master ~]# ip a
ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000link/ether 00:0c:29:fe:a2:12 brd ff:ff:ff:ff:ff:ffinet 20.0.0.50/24 brd 20.0.0.255 scope global ens33valid_lft forever preferred_lft foreverinet 20.0.0.100/24 scope global secondary ens33valid_lft forever preferred_lft foreverinet6 fe80::edac:d705:9b30:5197/64 scope link valid_lft forever preferred_lft forever[root@nginx-backup ~]# ip a
ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000link/ether 00:0c:29:e9:43:b6 brd ff:ff:ff:ff:ff:ffinet 20.0.0.60/24 brd 20.0.0.255 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::d283:86ee:ba5e:dcf8/64 scope link valid_lft forever preferred_lft forever2、关闭主节点的nginx看VIP地址是否漂移
[root@nginx-master ~]# pkill nginx
[root@nginx-master ~]# ip a
ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000link/ether 00:0c:29:fe:a2:12 brd ff:ff:ff:ff:ff:ffinet 20.0.0.50/24 brd 20.0.0.255 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::edac:d705:9b30:5197/64 scope link valid_lft forever preferred_lft forever[root@nginx-backup ~]# ip a
ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000link/ether 00:0c:29:e9:43:b6 brd ff:ff:ff:ff:ff:ffinet 20.0.0.60/24 brd 20.0.0.255 scope global ens33valid_lft forever preferred_lft foreverinet 20.0.0.100/24 scope global secondary ens33valid_lft forever preferred_lft foreverinet6 fe80::d283:86ee:ba5e:dcf8/64 scope link valid_lft forever preferred_lft forever#主节点nginx恢复正常后VIP地址会自动漂移回来，先启动nginx在启动keepalived
node IP指向VIP地址
所有node节点都进行如下设置
1、修改地址为VIP地址
vim /opt/kubernetes/cfg/bootstrap.kubeconfig
server: https://20.0.0.100:6443 #修改为VIP地址vim /opt/kubernetes/cfg/kubelet.kubeconfig
server: https://20.0.0.100:6443 #修改为VIP地址vim /opt/kubernetes/cfg/kube-proxy.kubeconfig
server: https://20.0.0.100:6443 #修改为VIP地址
2、重启
systemctl restart kubelet.service
systemctl restart kube-proxy.service
3、查看是否修改成功
grep 100 *bootstrap.kubeconfig: server: https://20.0.0.100:6443
kubelet.kubeconfig: server: https://20.0.0.100:6443
kube-proxy.kubeconfig: server: https://20.0.0.100:6443
测试方法负载
[root@master k8s-cert]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
20.0.0.20 Ready <none> 5h5m v1.12.3
20.0.0.30 Ready <none> 4h15m v1.12.3[root@nginx-backup ~]# tail -f /var/log/nginx/k8s-access.log
20.0.0.30 20.0.0.10:6443 - [21/Jan/2021:15:25:32 +0800] 200 1115
20.0.0.30 20.0.0.40:6443 - [21/Jan/2021:15:25:32 +0800] 200 1115
20.0.0.20 20.0.0.10:6443 - [21/Jan/2021:15:33:55 +0800] 200 1115
20.0.0.20 20.0.0.40:6443 - [21/Jan/2021:15:33:55 +0800] 200 1114
1、创建pod测试
[root@master k8s-cert]# kubectl run nginx --image=nginx
kubectl run --generator=deployment/apps.v1beta1 is DEPRECATED and will be removed in a future version. Use kubectl create instead.
deployment.apps/nginx created
2、查看状态
[root@master k8s-cert]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-mdfnc 0/1 ContainerCreating 0 22s[root@master k8s-cert]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-dbddb74b8-mdfnc 1/1 Running 0 50s
3、查看pod日志
[root@master k8s-cert]# kubectl logs nginx-dbddb74b8-mdfnc
#默认匿名用户没有权限
[root@master k8s-cert]# kubectl logs nginx-dbddb74b8-mdfnc
Error from server (Forbidden): Forbidden (user=system:anonymous, verb=get, resource=nodes, subresource=proxy) ( pods/log nginx-dbddb74b8-mdfnc)
#设置权限
[root@master k8s-cert]# kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous
clusterrolebinding.rbac.authorization.k8s.io/cluster-system-anonymous created
#查看pod创建在哪个节点创建
[root@master k8s-cert]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
nginx-dbddb74b8-mdfnc 1/1 Running 0 4m15s 172.17.75.3 20.0.0.30 <none>去node2上查看
[root@node2 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0040331bf8c1 nginx "/docker-entrypoint.…" 4 minutes ago Up 4 minutes k8s_nginx_nginx-dbddb74b8-mdfnc_default_c9b8648e-5bbb-11eb-b8b6-000c29d29307_0
66f042492ba0 registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0 "/pause" 5 minutes ago Up 5 minutes k8s_POD_nginx-dbddb74b8-mdfnc_default_c9b8648e-5bbb-11eb-b8b6-000c29d29307_0
43a46bd8868f centos:7