019.Kubernetes二进制部署插件dashboard

编程

一 修改配置文件

1.1 下载解压

  1 [root@k8smaster01 ~]# cd /opt/k8s/work/kubernetes/

2 [root@k8smaster01 kubernetes]# tar -xzvf kubernetes-src.tar.gz

提示:k8smaster01节点已解压完毕,可直接修改配置。

1.2 修改配置

  1 [root@k8smaster01 ~]# cd /opt/k8s/work/kubernetes/cluster/addons/dashboard

2 [root@k8smaster01 dashboard]# vi dashboard-service.yaml

3 ……

4 type: NodePort #增加此行,使用node形式访问

5 ……

6 #使用node方式访问dashboard

1.3 修改为国内源

  1 [root@k8smaster01 dashboard]# vi dashboard-controller.yaml

2 ……

3 image: mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.1

4 ……

提示:将yaml文件中的image字段修改为mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.1。

二 创建 dashboard

2.1 创建dashboard并检查

  1 [root@k8smaster01 ~]# cd /opt/k8s/work/kubernetes/cluster/addons/dashboard

2 [root@k8smaster01 dashboard]# kubectl apply -f .

2.2 查看分配的NodePort

  1 [root@k8smaster01 ~]# kubectl get deployment kubernetes-dashboard -n kube-system

2 NAME READY UP-TO-DATE AVAILABLE AGE

3 kubernetes-dashboard 1/1 1 1 84s

4 [root@k8smaster01 ~]# kubectl --namespace kube-system get pods -o wide

5 [root@k8smaster01 ~]# kubectl get services kubernetes-dashboard -n kube-system

提示:k8smaster02 NodePort 31181 映射到 dashboard pod 443 端口。

2.3 查看dashboard参数

  1 [root@k8smaster01 ~]# kubectl exec --namespace kube-system -it kubernetes-dashboard-7848d45466-bgz94  -- /dashboard --help

提示:dashboard 的 --authentication-mode 支持 token、basic,默认为 token。如果使用 basic,则 kube-apiserver 必须配置 --authorization-mode=ABAC 和 --basic-auth-file 参数。

三 dashboard验证方式

由于Kubernetes默认证书可能过期导致无法访问dashboard,本实验在已成功部署Kubernetes后手动重新创建证书。

3.1 创建证书

  1 [root@k8smaster01 ~]# cd /opt/k8s/work/

2 [root@k8smaster01 work]# openssl genrsa -out dashboard.key 2048

3 [root@k8smaster01 work]# openssl rsa -passin pass:x -in dashboard.key -out dashboard.key

4 [root@k8smaster01 work]# openssl req -new -key dashboard.key -out dashboard.csr

5 -----

6 Country Name (2 letter code) [XX]:CN

7 State or Province Name (full name) []:Shanghai

8 Locality Name (eg, city) [Default City]:Shanghai

9 Organization Name (eg, company) [Default Company Ltd]:k8s

10 Organizational Unit Name (eg, section) []:System

11 [root@k8smaster01 work]# openssl x509 -req -sha256 -days 365 -in dashboard.csr -signkey dashboard.key -out dashboard.crt

12 [root@k8smaster01 work]# openssl x509 -noout -text -in ./dashboard.crt #查看证书

3.2 分发证书

  1 [root@k8smaster01 ~]# cd /opt/k8s/work

2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh

3 [root@k8smaster01 work]# for all_ip in ${ALL_IPS[@]}

4do

5 echo ">>> ${all_ip}"

6 scp dashboard.* root@${all_ip}:/etc/kubernetes/cert

7 done

3.3 修改默认证书配置

  1 [root@k8smaster01 work]# cd /opt/k8s/work/kubernetes/cluster/addons/dashboard

2 [root@k8smaster01 dashboard]# kubectl delete -f . #删除使用默认证书所创建的dashboard

3 [root@k8smaster01 dashboard]# ll /etc/kubernetes/cert/dashboard.*

4 -rw-r--r-- 1 root root 1.2K Jun 28 18:06 /etc/kubernetes/cert/dashboard.crt

5 -rw-r--r-- 1 root root 976 Jun 28 18:06 /etc/kubernetes/cert/dashboard.csr

6 -rw-r--r-- 1 root root 1.7K Jun 28 18:06 /etc/kubernetes/cert/dashboard.key

7

8 [root@master dashboard]# kubectl create secret generic kubernetes-dashboard-certs --from-file="/etc/kubernetes/cert/dashboard.crt,/etc/kubernetes/cert/dashboard.key" -n kube-system #挂载新证书到dashboard

9 [root@master dashboard]# kubectl get secret kubernetes-dashboard-certs -n kube-system -o yaml #查看新证书

3.4 重新部署dashboard

  1 [root@k8smaster01 work]# cd /opt/k8s/work/kubernetes/cluster/addons/dashboard

2 [root@master dashboard]# kubectl apply -f .

3 [root@master dashboard]# kubectl get pods --namespace=kube-system | grep dashboard #确认验证

3.5 确认验证

  1 [root@k8smaster01 ~]# kubectl get deployment kubernetes-dashboard -n kube-system

2 [root@k8smaster01 ~]# kubectl --namespace kube-system get pods -o wide

3 [root@k8smaster01 ~]# kubectl get services kubernetes-dashboard -n kube-system

提示:k8smaster03 NodePort 30938 映射到 dashboard pod 443 端口。

四 访问dashboard

3.1 导入证书

将dashboard.crt导入IE浏览器,并设置为信任,导入操作略。

3.2 访问方式

本实验采用nodeip:nodepord方式访问。

浏览器访问:https://172.24.8.73:30938

提示:

更多dashboard访问方式及认证可参考《附004.Kubernetes Dashboard简介及使用》。

dashboard登录整个流程可参考:https://www.cnadn.net/post/2613.htm

apiserver方式见3.4,Kubeconfig验证方式见《附006.Kubernetes身份认证》中的3.5。

五 验证方式

5.1 创建token

  1 [root@k8smaster01 ~]# kubectl create sa dashboard-admin -n kube-system

2 [root@k8smaster01 ~]# kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin

3 [root@k8smaster01 ~]# ADMIN_SECRET=$(kubectl get secrets -n kube-system | grep dashboard-admin | awk "{print $1}")

4 [root@k8smaster01 ~]# DASHBOARD_LOGIN_TOKEN=$(kubectl describe secret -n kube-system ${ADMIN_SECRET} | grep -E "^token" | awk "{print $2}")

5 [root@k8smaster01 ~]# echo ${DASHBOARD_LOGIN_TOKEN} #输入登录的token

6 eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.X1NJsPNaAgV2TzJo0NlqOWFofDYOsSdkeiYHFGQFk5nNy0nbbnfnnoH0yumj_Ld0nGPakIjEpsUq9dqgCazeCpgk5EsygD6UlSg5sYA2sTLswbDoZdS3QzrOjY5MXWD3VDc_OQofD94MZqHMMw7IABVlfVsZ0vMEvHe-Qtyt6EQlFlHq5QjwDX8dCQDKRbwuiCr-Iy_dCWHHIhaT25BREf2viei8sZ497D8h4TXgO_u2CGf3qXRGNXj26VSdD8bT-BFGiDdyuXPbDHPU5LalvxF4WThChRfjO4zHLI2fOXq8BBF6DjbjhtG4X8fLuvJaxF4YWAmVS_78eJHhA3nvRg

3.4 创建kubeconfig文件

使用token相对复杂,可将token添加至kubeconfig文件中,使用KubeConfig 文件访问dashboard。

  1 [root@k8smaster01 ~]# cd /opt/k8s/work/

2 [root@k8smaster01 work]# source /opt/k8s/bin/environment.sh

3 [root@k8smaster01 work]# kubectl config set-cluster kubernetes

4 --certificate-authority=/etc/kubernetes/cert/ca.pem

5 --embed-certs=true

6 --server=${KUBE_APISERVER}

7 --kubeconfig=dashboard.kubeconfig # 设置集群参数

8 [root@k8smaster01 work]# kubectl config set-credentials dashboard_user

9 --token=${DASHBOARD_LOGIN_TOKEN}

10 --kubeconfig=dashboard.kubeconfig # 设置客户端认证参数,使用上面创建的 Token

11 [root@k8smaster01 work]# kubectl config set-context default

12 --cluster=kubernetes

13 --user=dashboard_user

14 --kubeconfig=dashboard.kubeconfig # 设置上下文参数

15 [root@k8smaster01 work]# kubectl config use-context default --kubeconfig=dashboard.kubeconfig # 设置默认上下文,将dashboard.kubeconfig文件导入,以便于浏览器使用该文件登录。

六 正式登录

6.1 kubeconfig访问

浏览器访问:https://172.24.8.73:30938


提示:由于缺少 Heapster 插件,当前 dashboard 不能展示 Pod、Nodes 的 CPU、内存等统计数据和图表。

以上是 019.Kubernetes二进制部署插件dashboard 的全部内容, 来源链接: utcz.com/z/510925.html

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