runsly 技术分享 2020-06-13

kubernets集群搭建web管理界面

标签：ati 界面 ddb iis 图片 VID resources 角色 clust

K8S集群搭建web管理界面

一、部署前查看K8S集群状态

[[email protected] ~]# kubectl get nodes
NAME              STATUS     ROLES    AGE     VERSION
192.168.191.131   NotReady   <none>   7d22h   v1.12.3
192.168.191.132   Ready      <none>   7d21h   v1.12.3
[[email protected] ~]# kubectl get pod
NAME                    READY   STATUS    RESTARTS   AGE
nginx-dbddb74b8-sx4m6   1/1     Running   0          5d14h

二、在master节点部署UI界面
1、创建dashboard工作目录

[[email protected] ~]# mkdir /k8s/dashboard

2、推送官方的文件到本地
https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dashboard

五个导入文档详解：

dashboard-configmap.yaml 配置映射服务
dashboard-deployment.yaml 控制器
dashboard-rbac.yaml 角色控制，访问控制
dashboard-secret.yaml 安全
dashboard-service.yaml 服务
创建这些资源时的步骤：
①身份角色
②安全
③配置映射
④控制器
⑤服务
这里我使用dashboard的1.8.4版本。1.8.4版本中有一个配置文件叫controller.yaml,现在的是1.10版本，名称改deployment.yaml，都是控制器。
```
[[email protected] ~]# cd /k8s/dashboard/
[[email protected] dashboard]# ls
[[email protected] dashboard]# ls
dashboard-configmap.yaml  dashboard-controller.yaml  dashboard-rbac.yaml  dashboard-secret.yaml  dashboard-service.yaml  k8s-admin.yaml
```
3.基于yaml文件创建pod资源

查看当前各个资源的状态
命名空间

[[email protected] dashboard]# kubectl get ns
NAME          STATUS   AGE
default       Active   7d23h
kube-public   Active   7d23h
kube-system   Active   7d23h

[[email protected] dashboard]# kubectl get pod
NAME                    READY   STATUS    RESTARTS   AGE
nginx-dbddb74b8-sx4m6   1/1     Running   0          5d14h
[[email protected] dashboard]# kubectl get pod -n kube-system
No resources found.

kubectl get all //这个all 包含pod、deployment、service和副本replicaset四个资源

[[email protected] dashboard]# kubectl get all   #这个all 包含pod、deployment、service和副本replicaset四个个资源
NAME                        READY   STATUS    RESTARTS   AGE
pod/nginx-dbddb74b8-sx4m6   1/1     Running   0          5d14h
NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes   ClusterIP   10.0.0.1     <none>        443/TCP   7d23h
NAME                    DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/nginx   1         1         1            1           5d14h
NAME                              DESIRED   CURRENT   READY   AGE
replicaset.apps/nginx-dbddb74b8   1         1         1       5d14h

查看当前k8s中的角色

[[email protected] dashboard]# kubectl get Role -n kube-system
NAME                                             AGE
extension-apiserver-authentication-reader        7d23h
system::leader-locking-kube-controller-manager   7d23h
system::leader-locking-kube-scheduler            7d23h
system:controller:bootstrap-signer               7d23h
system:controller:cloud-provider                 7d23h
system:controller:token-cleaner                  7d23h

创建rbac资源

[[email protected] dashboard]# kubectl create -f dashboard-rbac.yaml 
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created

查看创建后的资源状态

[[email protected] dashboard]# kubectl get all
NAME                        READY   STATUS    RESTARTS   AGE
pod/nginx-dbddb74b8-sx4m6   1/1     Running   0          5d14h
NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes   ClusterIP   10.0.0.1     <none>        443/TCP   7d23h
NAME                    DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/nginx   1         1         1            1           5d14h
NAME                              DESIRED   CURRENT   READY   AGE
replicaset.apps/nginx-dbddb74b8   1         1         1       5d14h

查看角色，在配置文件中，角色的命名空间指定的是kube-system，所以查看的时候要-n指定

[[email protected] dashboard]# kubectl get role -n kube-system
NAME                                             AGE
extension-apiserver-authentication-reader        7d23h
kubernetes-dashboard-minimal                     3m
system::leader-locking-kube-controller-manager   7d23h
system::leader-locking-kube-scheduler            7d23h
system:controller:bootstrap-signer               7d23h
system:controller:cloud-provider                 7d23h
system:controller:token-cleaner                  7d23h

#创建身份角色
[[email protected] dashboard]# kubectl create -f dashboard-rbac.yaml 
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
#创建安全管理
[[email protected] dashboard]# kubectl create -f dashboard-secret.yaml 
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-key-holder created
#配置映射服务
[[email protected] dashboard]# kubectl create -f dashboard-configmap.yaml 
configmap/kubernetes-dashboard-settings created
#创建控制器
#本文创建的是1.84版本所以使用的是controller.yaml，在1.10版本使用的是deployment.yaml，两者都是一样的，都是控制器
[[email protected] dashboard]# kubectl create -f dashboard-controller.yaml 
serviceaccount/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
#创建服务
[[email protected] dashboard]# kubectl create -f dashboard-service.yaml 
service/kubernetes-dashboard created

5.完成后查看创建在指定的kube-system命名空间下

[[email protected] dashboard]# kubectl get pods -n kube-system
NAME                                    READY   STATUS              RESTARTS   AGE
kubernetes-dashboard-65f974f565-m9gm8   0/1     ContainerCreating   0          88s

6.查看访问地址

[[email protected] dashboard]# kubectl get pods,svc -n kube-system
NAME                                        READY   STATUS    RESTARTS   AGE
pod/kubernetes-dashboard-65f974f565-m9gm8   1/1     Running   0          2m49s

NAME                           TYPE       CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE
service/kubernetes-dashboard   NodePort   10.0.0.243   <none>        443:30001/TCP   2m24s

此时访问node节点的ip地址
发现并不能访问到，因为此时是不信任的证书

7.创建证书

[[email protected] dashboard]# vim dashboard-cert.sh
cat > dashboard-csr.json <<EOF
{
   "CN": "Dashboard",
   "hosts": [],
   "key": {
       "algo": "rsa",
       "size": 2048
   },
   "names": [
       {
           "C": "CN",
           "L": "BeiJing",
           "ST": "BeiJing"
       }
   ]
}
EOF

K8S_CA=$1
cfssl gencert -ca=$K8S_CA/ca.pem -ca-key=$K8S_CA/ca-key.pem -config=$K8S_CA/ca-config.json -profile=kubernetes dashboard-csr.json | cfssljson -bare dashboard
kubectl delete secret kubernetes-dashboard-certs -n kube-system
kubectl create secret generic kubernetes-dashboard-certs --from-file=./ -n kube-system

#执行生成认证证书
[[email protected] dashboard]# bash dashboard-cert.sh /root/k8s/k8s-cert/
#在dashboard-controller.yaml的args标签下面增加证书两行
[[email protected] dashboard]# vim dashboard-controller.yaml
args:
          # PLATFORM-SPECIFIC ARGS HERE
          - --auto-generate-certificates
          - --tls-key-file=dashboard-key.pem
          - --tls-cert-file=dashboard.pem

#重新部署
[[email protected] dashboard]# kubectl apply -f dashboard-controller.yaml

生成证书后即可正常访问

生成令牌

AGE
dashboard-admin-token-vnm9z        kubernetes.io/service-account-token   3      65s
default-token-zb8bw                kubernetes.io/service-account-token   3      8d
kubernetes-dashboard-certs         Opaque                                11     162s
kubernetes-dashboard-key-holder    Opaque                                2      262s
kubernetes-dashboard-token-ctfp9   kubernetes.io/service-account-token   3      62s
#查看令牌
[[email protected] dashboard]# kubectl describe secret dashboard-admin-token-vnm9z -n kube-system
Name:         dashboard-admin-token-vnm9z
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: dashboard-admin
              kubernetes.io/service-account.uid: de06f523-905f-11ea-80d3-000c29535012

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1359 bytes
namespace:  11 bytes
//复制使用下面的令牌信息即可登录
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.gfj0Yba5aexCLCDiPp2MzFEesuFUOxqJf0HFofijRm5_MjucfsLVdIgWg4eIS8Vuf8Fz7JX0sqhhDN-j4KgNAfIi7ZwREDC73NExYCTpbcBZSVff9MA0ynmLcAySRUToDNS58My2ZQpPsDokI0-wrOyql-VQcTgKdJ3Qwj6wdZVvBGXJlWzDS4AxSZTdJVGJtrfN9SNr1372wqWY7QLJj3zn-mc6F5eLU-bR9DJ7909qSV7Vh-XSJtzbRpbxQk9AGo5r1Rb2I04fchiVLVVE8K362bLtGkjXulmybya_t1naG0_YRlOZDG3GOQcKG0KyvYcFjPWLX89uop7u2Tl5Kg

到这里K8S群集的web管理界面搭建完成了