具有kubernetes1.16 安装dashboard UI

作者: 无处安放的躁动 | 来源:发表于2019-10-24 11:07 被阅读0次

前言

前面踩坑特别特别多，由于网络原因，由于版本原因，由于证书原因等等。

分析

下载官方文件
修改官方文件
配置证书
拉取镜像为本地并设置为master为部署节点
启动kubernetes-dashboard
页面登录
授权管理员
查看日志

部署dashboard 过程

下载官方文件

修改官方文件

wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta4/aio/deploy/recommended.yaml

修改官方文件

证书问题

 48 #---
 49 ## 由于证书问题，只能firefox浏览器才能打开，通过修改证书的方式，使得所有浏览器都能打开
 50 #apiVersion: v1
 51 #kind: Secret
 52 #metadata:
 53 #  labels:
 54 #    k8s-app: kubernetes-dashboard
 55 #  name: kubernetes-dashboard-certs  #生成证书会用到该名字
 56 #  namespace: kubernetes-dashboard  #生成证书使用该命名空间
 57 #type: Opaque

名字很重要下面生成证书会用到

修改获取镜像相关

190     spec:
191       nodeSelector:     #部署在哪一个节点的选择器
192         type: master     # master
193       containers:
194         - name: kubernetes-dashboard
195           image: kubernetesui/dashboard:v2.0.0-beta4
196           #imagePullPolicy: Always                                  # 注释原来的镜像拉取规则
197           imagePullPolicy: IfNotPresent                           # 设置为本地没有则拉取

镜像相关设置

暴露端口相关设置

 30 ---
 31 
 32 kind: Service
 33 apiVersion: v1
 34 metadata:
 35   labels:
 36     k8s-app: kubernetes-dashboard
 37   name: kubernetes-dashboard
 38   namespace: kubernetes-dashboard
 39 spec:
 40   type: NodePort                  # 设置为NodePort
 41   ports:
 42     - port: 443
 43       nodePort: 30001           # 不设置则为随机，设置则为该端口
 44       targetPort: 8443
 45   selector:
 46     k8s-app: kubernetes-dashboard

配置证书

# 创建目录使用证书
mkdir key && cd key
# 查看是否存在namespace为kubernetes-dashboard
kubectl get namespaces
# 不存在namespace为创建kubernetes-dashboard创建namespace
kubectl create namespace kubernetes-dashboard
# 生成 key
openssl genrsa -out dashboard.key 2048
# 生成证书请求
openssl req -days 36000   -new -out dashboard.csr    -key dashboard.key   -subj '/CN=**192.168.100.10**'
# 生成自签证书
openssl x509 -req -in dashboard.csr -signkey dashboard.key -out dashboard.crt
# 目录结构
[root@k8smaster key]# ll
total 12
-rw-r--r-- 1 root root 1001 Oct 23 22:21 dashboard.crt
-rw-r--r-- 1 root root  903 Oct 23 22:20 dashboard.csr
-rw-r--r-- 1 root root 1679 Oct 23 22:20 dashboard.key
# 使用自签证书创建secret
kubectl create secret generic kubernetes-dashboard-certs     --from-file=dashboard.key     --from-file=dashboard.crt      -n kubernetes-dashboard

在master节点上这是label，拉取镜像

# 设置node选择器label为master
kubectl label node k8smaster type=master
# 拉取镜像
docker pull kubernetesui/dashboard:v2.0.0-beta4

启动

kubectl apply -f  recommended.yaml

检查

# 查看pod 与service是否运行正常
[root@k8smaster 1]# kubectl  get pod,svc -n kubernetes-dashboard  -o wide
NAME                                             READY   STATUS    RESTARTS   AGE     IP            NODE        NOMINATED NODE   READINESS GATES
pod/dashboard-metrics-scraper-566cddb686-7csmx   1/1     Running   0          2m16s   10.244.2.15   k8snode1    <none>           <none>
pod/kubernetes-dashboard-75d8b49cf6-fcn6v        1/1     Running   0          2m17s   10.244.0.19   k8smaster   <none>           <none>

NAME                                TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)         AGE     SELECTOR
service/dashboard-metrics-scraper   ClusterIP   10.110.92.64     <none>        8000/TCP        2m16s   k8s-app=dashboard-metrics-scraper
service/kubernetes-dashboard        NodePort    10.101.171.115   <none>        443:30001/TCP   2m17s   k8s-app=kubernetes-dashboard
[root@k8smaster 1]# kubectl describe pod kubernetes-dashboard-75d8b49cf6-fcn6v -n kubernetes-dashboard 
Name:         kubernetes-dashboard-75d8b49cf6-fcn6v
Namespace:    kubernetes-dashboard
Priority:     0
Node:         k8smaster/192.168.100.10
Start Time:   Wed, 23 Oct 2019 22:31:49 -0400
Labels:       k8s-app=kubernetes-dashboard
              pod-template-hash=75d8b49cf6
... ...
省略
... ...
Events:
  Type    Reason     Age        From                Message
  ----    ------     ----       ----                -------
  Normal  Scheduled  <unknown>  default-scheduler   Successfully assigned kubernetes-dashboard/kubernetes-dashboard-75d8b49cf6-fcn6v to k8smaster
  Normal  Pulled     3m1s       kubelet, k8smaster  Container image "kubernetesui/dashboard:v2.0.0-beta4" already present on machine
  Normal  Created    3m1s       kubelet, k8smaster  Created container kubernetes-dashboard
  Normal  Started    3m         kubelet, k8smaster  Started container kubernetes-dashboard
# 查看

页面登录

浏览器打开
到登录页面

默认用户登录

# 获取token
kubectl describe secrets  $(kubectl  get secrets -n kubernetes-dashboard | awk  '/kubernetes-dashboard-token/{print $1}' ) -n kubernetes-dashboard |sed -n '/token:.*/p'
# 使用该token登录

默认用户权限不足

默认用户现象

授权管理员

# 创建sa
kubectl create serviceaccount dashboard-admin -n kubernetes-dashboard
# 绑定集群管理员
kubectl create clusterrolebinding  dashboard-cluster-admin --clusterrole=cluster-admin --serviceaccount=kubernetes-dashboard:dashboard-admin
# 查看sa以及secrets
[root@k8smaster ENV]# kubectl  get sa,secrets -n kubernetes-dashboard 
NAME                                  SECRETS   AGE
serviceaccount/dashboard-admin        1         32s
serviceaccount/default                1         33m
serviceaccount/kubernetes-dashboard   1         25m

NAME                                      TYPE                                  DATA   AGE
secret/dashboard-admin-token-rjk49        kubernetes.io/service-account-token   3      32s
secret/default-token-65rm4                kubernetes.io/service-account-token   3      33m
secret/kubernetes-dashboard-certs         Opaque                                2      33m
secret/kubernetes-dashboard-csrf          Opaque                                1      25m
secret/kubernetes-dashboard-key-holder    Opaque                                2      25m
secret/kubernetes-dashboard-token-696vq   kubernetes.io/service-account-token   3      25m
# 查看token
kubectl describe secrets dashboard-admin-token-rjk49 -n kubernetes-dashboard 
- 或者通过下面命令直接获取token
kubectl describe secrets  $(kubectl  get secrets -n kubernetes-dashboard | awk  '/dashboard-admin-token/{print $1}' ) -n kubernetes-dashboard |sed -n '/token:.*/p'

管理员登录截图

管理员登录截图

查看日志

kubectl   logs -f    kubernetes-dashboard-75d8b49cf6-fcn6v  -n kubernetes-dashboard

后话

欢迎交流
必要时候必须查看官方文档

坑点

由于版本原因，上面操作都正常，你授权管理员登录会出现404，实测版本：1.10.1
安装# heapster
由于extensions/v1beta1弃用，会出现一连串的问题官网公告
heapster 问题

修改后资源清单

[root@k8smaster 1]# cat recommended.yaml 
# Copyright 2017 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

apiVersion: v1
kind: Namespace
metadata:
  name: kubernetes-dashboard

---

apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard

---

kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  type: NodePort
  ports:
    - port: 443
      nodePort: 30001
      targetPort: 8443
  selector:
    k8s-app: kubernetes-dashboard

#---
#
#apiVersion: v1
#kind: Secret
#metadata:
#  labels:
#    k8s-app: kubernetes-dashboard
#  name: kubernetes-dashboard-certs
#  namespace: kubernetes-dashboard
#type: Opaque

---

apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-csrf
  namespace: kubernetes-dashboard
type: Opaque
data:
  csrf: ""

---

apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-key-holder
  namespace: kubernetes-dashboard
type: Opaque

---

kind: ConfigMap
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-settings
  namespace: kubernetes-dashboard

---

kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
rules:
  # Allow Dashboard to get, update and delete Dashboard exclusive secrets.
  - apiGroups: [""]
    resources: ["secrets"]
    resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"]
    verbs: ["get", "update", "delete"]
    # Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.
  - apiGroups: [""]
    resources: ["configmaps"]
    resourceNames: ["kubernetes-dashboard-settings"]
    verbs: ["get", "update"]
    # Allow Dashboard to get metrics.
  - apiGroups: [""]
    resources: ["services"]
    resourceNames: ["heapster", "dashboard-metrics-scraper"]
    verbs: ["proxy"]
  - apiGroups: [""]
    resources: ["services/proxy"]
    resourceNames: ["heapster", "http:heapster:", "https:heapster:", "dashboard-metrics-scraper", "http:dashboard-metrics-scraper"]
    verbs: ["get"]

---

kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
rules:
  # Allow Metrics Scraper to get metrics from the Metrics server
  - apiGroups: ["metrics.k8s.io"]
    resources: ["pods", "nodes"]
    verbs: ["get", "list", "watch"]

---

apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: kubernetes-dashboard
subjects:
  - kind: ServiceAccount
    name: kubernetes-dashboard
    namespace: kubernetes-dashboard

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: kubernetes-dashboard
subjects:
  - kind: ServiceAccount
    name: kubernetes-dashboard
    namespace: kubernetes-dashboard

---

kind: Deployment
apiVersion: apps/v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
    spec:
      nodeSelector:
        type: master
      containers:
        - name: kubernetes-dashboard
          #image: registry.cn-hangzhou.aliyuncs.com/google_containers/dashboard:v2.0.0-beta4
          image: kubernetesui/dashboard:v2.0.0-beta4
          #imagePullPolicy: Always
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 8443
              protocol: TCP
          args:
            - --auto-generate-certificates
            - --namespace=kubernetes-dashboard
            # Uncomment the following line to manually specify Kubernetes API server Host
            # If not specified, Dashboard will attempt to auto discover the API server and connect
            # to it. Uncomment only if the default does not work.
            # - --apiserver-host=http://my-address:port
          volumeMounts:
            - name: kubernetes-dashboard-certs
              mountPath: /certs
              # Create on-disk volume to store exec logs
            - mountPath: /tmp
              name: tmp-volume
          livenessProbe:
            httpGet:
              scheme: HTTPS
              path: /
              port: 8443
            initialDelaySeconds: 30
            timeoutSeconds: 30
      volumes:
        - name: kubernetes-dashboard-certs
          secret:
            secretName: kubernetes-dashboard-certs
        - name: tmp-volume
          emptyDir: {}
      serviceAccountName: kubernetes-dashboard
      # Comment the following tolerations if Dashboard must not be deployed on master
      tolerations:
        - key: node-role.kubernetes.io/master
          effect: NoSchedule

---

kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: dashboard-metrics-scraper
  name: dashboard-metrics-scraper
  namespace: kubernetes-dashboard
spec:
  ports:
    - port: 8000
      targetPort: 8000
  selector:
    k8s-app: dashboard-metrics-scraper

---

kind: Deployment
apiVersion: apps/v1
metadata:
  labels:
    k8s-app: dashboard-metrics-scraper
  name: dashboard-metrics-scraper
  namespace: kubernetes-dashboard
spec:
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      k8s-app: dashboard-metrics-scraper
  template:
    metadata:
      labels:
        k8s-app: dashboard-metrics-scraper
    spec:
      containers:
        - name: dashboard-metrics-scraper
          image: kubernetesui/metrics-scraper:v1.0.1
          ports:
            - containerPort: 8000
              protocol: TCP
          livenessProbe:
            httpGet:
              scheme: HTTP
              path: /
              port: 8000
            initialDelaySeconds: 30
            timeoutSeconds: 30
          volumeMounts:
          - mountPath: /tmp
            name: tmp-volume
      serviceAccountName: kubernetes-dashboard
      # Comment the following tolerations if Dashboard must not be deployed on master
      tolerations:
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
      volumes:
        - name: tmp-volume
          emptyDir: {}

具有kubernetes1.16 安装dashboard UI

前言

分析

部署dashboard 过程

下载官方文件

修改官方文件

配置证书

在master节点上这是label，拉取镜像

启动

检查

页面登录

默认用户登录

授权管理员

后话

坑点

修改后资源清单

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