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019.Kubernetes二进制部署插件dashboard

2019-11-19 11:47 2071 查看

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[@]}
4   do
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。
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