9. DashBoard

2023-12-17 20:36:17

9. DashBoard

  • 在kubernetes中完成的所有操作都是通过命令行工具kubectl完成的。

  • 为了提供更丰富的用户体验,kubernetes还开发了一个基于web的用户界面(Dashboard)。

  • 用户可以使用Dashboard部署容器化的应用,还可以监控应用的状态,执行故障排查以及管理kubernetes中各种资源。

9.1 部署Dashboard

下载yaml,并运行Dashboard

[root@k8s-master ~]#  wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml
--2023-12-18 02:00:42--  https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 185.199.111.133, 185.199.108.133, 185.199.109.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|185.199.111.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7621 (7.4K) [text/plain]
Saving to: ‘recommended.yaml’

recommended.yaml                  100%[============================================================>]   7.44K  15.9KB/s    in 0.5s    

2023-12-18 02:00:45 (15.9 KB/s) - ‘recommended.yaml’ saved [7621/7621]

[root@k8s-master ~]# ls
anaconda-ks.cfg  inventory  kube-flannel.yml  recommended.yaml

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

[root@k8s-master ~]# vi recommended.yaml 
[root@k8s-master ~]# 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
      targetPort: 8443
      nodePort: 30001
  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
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:
      securityContext:
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: kubernetes-dashboard
          image: kubernetesui/dashboard:v2.7.0
          imagePullPolicy: Always
          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
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            runAsUser: 1001
            runAsGroup: 2001
      volumes:
        - name: kubernetes-dashboard-certs
          secret:
            secretName: kubernetes-dashboard-certs
        - name: tmp-volume
          emptyDir: {}
      serviceAccountName: kubernetes-dashboard
      nodeSelector:
        "kubernetes.io/os": linux
      # 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:
      securityContext:
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: dashboard-metrics-scraper
          image: kubernetesui/metrics-scraper:v1.0.8
          ports:
            - containerPort: 8000
              protocol: TCP
          livenessProbe:
            httpGet:
              scheme: HTTP
              path: /
              port: 8000
            initialDelaySeconds: 30
            timeoutSeconds: 30
          volumeMounts:
          - mountPath: /tmp
            name: tmp-volume
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            runAsUser: 1001
            runAsGroup: 2001
      serviceAccountName: kubernetes-dashboard
      nodeSelector:
        "kubernetes.io/os": linux
      # 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: {}
          
# 部署
[root@k8s-master ~]# kubectl apply -f recommended.yaml 
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created

# 查看namespace下的kubernetes-dashboard下的资源
[root@k8s-master ~]# kubectl get pod,svc -n kubernetes-dashboard
NAME                                             READY   STATUS              RESTARTS   AGE
pod/dashboard-metrics-scraper-5657497c4c-jw9km   0/1     ContainerCreating   0          34s
pod/kubernetes-dashboard-78f87ddfc-vcfzt         0/1     ContainerCreating   0          34s

NAME                                TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)         AGE
service/dashboard-metrics-scraper   ClusterIP   10.101.86.124   <none>        8000/TCP        34s
service/kubernetes-dashboard        NodePort    10.98.6.114     <none>        443:30001/TCP   34s
[root@k8s-master ~]# kubectl get pods -n kubernetes-dashboard -o wide
NAME                                         READY   STATUS    RESTARTS   AGE   IP           NODE        NOMINATED NODE   READINESS GATES
dashboard-metrics-scraper-5657497c4c-jw9km   1/1     Running   0          42s   10.244.1.9   k8s-node1   <none>           <none>
kubernetes-dashboard-78f87ddfc-vcfzt         1/1     Running   0          42s   10.244.2.9   k8s-node2   <none>           <none>
[root@k8s-master ~]# 

创建访问账户,获取token

[root@k8s-master ~]# mkdir dashboard
[root@k8s-master ~]# cd dashboard/
[root@k8s-master dashboard]# ls
[root@k8s-master dashboard]# vi user.yaml
[root@k8s-master dashboard]# vi ClusterRoleBinding
[root@k8s-master dashboard]# cat user.yaml 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin
  namespace: kubernetes-dashboard
[root@k8s-master dashboard]# cat ClusterRoleBinding 
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin
  namespace: kubernetes-dashboard
[root@k8s-master dashboard]# kubectl apply -f user.yaml 
serviceaccount/admin created
[root@k8s-master dashboard]# kubectl apply -f ClusterRoleBinding 
clusterrolebinding.rbac.authorization.k8s.io/admin created
[root@k8s-master dashboard]# kubectl get -f user.yaml 
NAME    SECRETS   AGE
admin   0         14s
[root@k8s-master dashboard]# kubectl get -f ClusterRoleBinding 
NAME    ROLE                        AGE
admin   ClusterRole/cluster-admin   17s
[root@k8s-master dashboard]#  kubectl -n kubernetes-dashboard create token admin
eyJhbGciOiJSUzI1NiIsImtpZCI6Ikk0Y2JXVDljaXZkWlotbzJTQU5KWTlkRXJnR3VSVFhKYnpUZ3JNTmNBLWMifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNzAyODQxNTY5LCJpYXQiOjE3MDI4Mzc5NjksImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbiIsInVpZCI6ImVhNWMwNDZlLTM4ODItNDdhZS1iZGQ1LTkwZTFhNjU4ODc5ZSJ9fSwibmJmIjoxNzAyODM3OTY5LCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZXJuZXRlcy1kYXNoYm9hcmQ6YWRtaW4ifQ.DtEBQjFJBeMbcr_Daprk1kV5_5Jz2fno0k5QrTGX7CF12vedX1KYQXgQQKiXWhVEgJu5Q_bx7qmGcupQZCyX8EyYu5CN6-Gzedcp8dB4_C_CIVGj9XQPeaPxpIfzryovGE972Z2I6JUaJx_cyAbo0HeFvs1CT6rPvJydr60bKjTztxp_NixCWk962mBsPRQREkbhAOiJUUSlgNQs-22ETVU1MJeExdzTxhw4nOAFRjiQ_RbJG93NW7CaXwnTL65DvoBa_7xztXMsQ19vBxvESgF_O7lKll0g7wY459_gEh_234z2kXEpD1sCLsVoUmVx477-98PygEfseNoU-MXFPw
[root@k8s-master dashboard]# kubectl get serviceaccount -n kubernetes-dashboard
NAME                   SECRETS   AGE
admin                  0         20m
default                0         49m
kubernetes-dashboard   0         49m

# 保存在文档以便以后使用
[root@k8s-master dashboard]# vi token
[root@k8s-master dashboard]# cat token 
eyJhbGciOiJSUzI1NiIsImtpZCI6Ikk0Y2JXVDljaXZkWlotbzJTQU5KWTlkRXJnR3VSVFhKYnpUZ3JNTmNBLWMifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNzAyODQxNTY5LCJpYXQiOjE3MDI4Mzc5NjksImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbiIsInVpZCI6ImVhNWMwNDZlLTM4ODItNDdhZS1iZGQ1LTkwZTFhNjU4ODc5ZSJ9fSwibmJmIjoxNzAyODM3OTY5LCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZXJuZXRlcy1kYXNoYm9hcmQ6YWRtaW4ifQ.DtEBQjFJBeMbcr_Daprk1kV5_5Jz2fno0k5QrTGX7CF12vedX1KYQXgQQKiXWhVEgJu5Q_bx7qmGcupQZCyX8EyYu5CN6-Gzedcp8dB4_C_CIVGj9XQPeaPxpIfzryovGE972Z2I6JUaJx_cyAbo0HeFvs1CT6rPvJydr60bKjTztxp_NixCWk962mBsPRQREkbhAOiJUUSlgNQs-22ETVU1MJeExdzTxhw4nOAFRjiQ_RbJG93NW7CaXwnTL65DvoBa_7xztXMsQ19vBxvESgF_O7lKll0g7wY459_gEh_234z2kXEpD1sCLsVoUmVx477-98PygEfseNoU-MXFPw

如果需要删除admin ServiceAccount和ClusterRoleBinding。

kubectl -n kubernetes-dashboard delete serviceaccount admin
kubectl -n kubernetes-dashboard delete clusterrolebinding admin

** 通过浏览器访问Dashboard的UI**

将生成的token复制粘贴到这个
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出现下面界面代表登录成功
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9.2 使用DashBoard

创建一个pod查看

[root@k8s-master dashboard]# vi httpd.yaml
[root@k8s-master dashboard]# cat httpd.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: pod-pullimage
  namespace: dev
  labels:
    app: httpdlab
spec:
  nodeName: k8s-node2
  containers:
  - name: httpd
    image: httpd:latest
    imagePullPolicy: IfNotPresent
[root@k8s-master dashboard]# kubectl apply -f httpd.yaml 
pod/pod-pullimage created
[root@k8s-master dashboard]# kubectl get -f httpd.yaml 
NAME            READY   STATUS    RESTARTS   AGE
pod-pullimage   1/1     Running   0          6s
[root@k8s-master dashboard]# kubectl get pods -n dev
NAME            READY   STATUS    RESTARTS   AGE
pod-pullimage   1/1     Running   0          16s

可以查看到有一个在namespace是dev运行的pod
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删除成功
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创建deploy
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[root@k8s-master dashboard]# curl 10.110.57.228:8888
<html><body><h1>It works!</h1></body></html>

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[root@k8s-master dashboard]# curl 10.110.57.228:8888
<html><body><h1>It works!</h1></body></html>
[root@k8s-master dashboard]# kubectl get svc -n dev
NAME   TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
web    NodePort   10.110.57.228   <none>        8888:31421/TCP   7m5s

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文章来源:https://blog.csdn.net/whl0102222/article/details/135048825
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