Kubernetes集群部署下

k8s环境规划总图

Kubernetes集群部署下

环境装备

二台master节点二台node节点二台安装nginx做负载均衡和故障转移以及飘逸地址vip

Kubernetes集群部署下

部署流程

关闭防火墙及安全功能

systemctl stop firewalld.service
setenforce 0

复制kubernetes目录到master2 （上个实验k8s目录）

scp -r /opt/kubernetes/ [email protected]:/opt

复制etcd目录到master2

scp -r /opt/etcd/ [email protected]:/opt

复制服务脚本

scp /usr/lib/systemd/system/{kube-apiserver,kube-controller-manager,kube-scheduler}.service [email protected]:/usr/lib/systemd/system/

修改配置文件，将ip地址改为本机地址

vim /opt/kubernetes/cfg/kube-apiserver

--bind-address=192.168.149.129
--advertise-address=192.168.149.129

追加修改环境变量并执行生效

vim /etc/profile

export PATH=$PATH:/opt/kubernetes/bin/

source /etc/profile

部署keepalive服务，准备脚本

vim keepalive.conf

Kubernetes集群部署下

将脚本放入家目录中后，建立yum仓库

vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http:/ /nginx.org/packages/centos/7/$basearch/
gpgcheck=0

完成后，刷新yum仓库，下载nginx

yum list
yum install nginx -y

添加四层转发模块，开启服务

Kubernetes集群部署下

安装keepalive服务，将准备好的配置文件覆盖，并修改

yum install keepalived -y
cp keepalived.conf /etc/keepalived/keepalived.conf
vim /etc/keepalived/keepalived.conf

Kubernetes集群部署下

创建nginx脚本，并检测
Kubernetes集群部署下

vim /etc/nginx/check_nginx.sh

count=$(ps -ef |grep nginx |egrep -cv "grep|$$")

if [ "$count" -eq 0 ];then
systemctl stop keepalived
fi

chmod +x /etc/nginx/check_nginx.sh
systemctl start keepalived.service
ip a

ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:eb:11:2a brd ff:ff:ff:ff:ff:ff
inet 192.168.149.140/24 brd 192.168.142.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::53ba:daab:3e22:e711/64 scope link
valid_lft forever preferred_lft forever

node节点修改配置文件

cd /opt/kubernetes/cfg/
#配置文件统一修改为VIP
vim /opt/kubernetes/cfg/bootstrap.kubeconfig

server: https:/ /192.168.149.20:6443
#第5行改为Vip的地址

vim /opt/kubernetes/cfg/kubelet.kubeconfig
server: https:/ /192.168.149.20:6443
#第5行改为Vip的地址

vim /opt/kubernetes/cfg/kube-proxy.kubeconfig
server: https:/ /192.168.149.20:6443
#第5行改为Vip的地址

替换完成后自检

grep 20 *

bootstrap.kubeconfig: server: https:/ /192.168.142.20:6443
kubelet.kubeconfig: server: https:/ /192.168.142.20:6443
kube-proxy.kubeconfig: server: https:/ /192.168.142.20:6443

在lb01上查看nginx的k8s日志

tail /var/log/nginx/k8s-access.log
192.168.142.140 192.168.142.129:6443 - [08/Feb/2020:19:20:40 +0800] 200 1119
192.168.142.140 192.168.142.120:6443 - [08/Feb/2020:19:20:40 +0800] 200 1119
192.168.142.150 192.168.142.129:6443 - [08/Feb/2020:19:20:44 +0800] 200 1120
192.168.142.150 192.168.142.120:6443 - [08/Feb/2020:19:20:44 +0800] 200 1120

创建Pod

测试创建Pod

kubectl run nginx --image=nginx

查看状态

kubectl get pods

绑定群集中的匿名用户赋予管理员权限

kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous

创建UI显示界面

在master1上创建dashborad工作目录

mkdir /k8s/dashboard

cd /k8s/dashboard

上传官方的文件到该目录中

授权访问api

kubectl create -f dashboard-rbac.yaml

加密
kubectl create -f dashboard-secret.yaml

配置应用
kubectl create -f dashboard-configmap.yaml

控制器
kubectl create -f dashboard-controller.yaml

发布访问

kubectl create -f dashboard-service.yaml

完成后查看创建在指定的kube-system命名空间下

kubectl get pods -n kube-system

查看如何访问

kubectl get pods,svc -n kube-system

在master端,编写证书自签

Kubernetes集群部署下

重新应用新的自签证书

bash dashboard-cert.sh /root/k8s/apiserver/

修改yaml文件
vim dashboard-controller.yaml
      - --tls-key-file=dashboard-key.pem
      - --tls-cert-file=dashboard.pem
重新进行部署
kubectl apply -f dashboard-controller.yaml

生成令牌

kubectl create -f k8s-admin.yaml
将令牌保存
kubectl get secret -n kube-system

Kubernetes集群部署下

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Kubernetes集群部署下

Kubernetes集群部署 下

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