Kubernetes集群之Dashboard

使用kubeadm搭建Dashboard

系列博文

下载yaml文件

https://rawgit.com/kubernetes/dadashboard/master/src/deploy/kubernetes-dashboard.yaml

将镜像gcr.io/google_containers/kubernetes-dadashboard-amd64:v1.5.0放进私有库中

修改yaml文件

去掉`imagePullPolicy: Always`,在[漠大神的博客](https://mritd.me/2016/10/29/set-up-kubernetes-cluster-by-kubeadm/#section-6)中将值改为IfNotPresent或者Never，但是仍然出错；

image地址改为`192.168.1.78:5000/kubernetes-dashboard-amd64:v1.5.0`

部署

kubectl create -f kubernetes-dashboard.yaml

<<'COMMENT'
deployment "kubernetes-dashboard" created
service "kubernetes-dashboard" created
COMMENT

查看deployments

kubectl get deployment --all-namespaces

<<'COMMENT'
NAMESPACE     NAME                   DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
kube-system   kube-discovery         1         1         1            1           22h
kube-system   kube-dns               1         1         1            1           22h
kube-system   kubernetes-dashboard   1         1         1            1           30m
COMMENT

查看service

kubectl get service --all-namespaces

<<'COMMENT'
NAMESPACE     NAME                   CLUSTER-IP     EXTERNAL-IP   PORT(S)         AGE
default       kubernetes             10.96.0.1      <none>        443/TCP         23h
kube-system   kube-dns               10.96.0.10     <none>        53/UDP,53/TCP   23h
kube-system   kubernetes-dashboard   10.101.241.6   <nodes>       80/TCP          34m
COMMENT

查看dashboard的端口

kubectl describe svc kubernetes-dashboard --namespace kube-system

<<'COMMENT'
Name:                   kubernetes-dashboard
Namespace:              kube-system
Labels:                 app=kubernetes-dashboard
Selector:               app=kubernetes-dashboard
Type:                   NodePort
IP:                     10.101.241.6
Port:                   <unset> 80/TCP
NodePort:               <unset> 32688/TCP
Endpoints:              10.244.1.14:9090
Session Affinity:       None
COMMENT	

从中可以看出其类型为NodePort,端口为32688;或者可将该端口固定住(在yaml文件中的service中使用NodePort)。

访问dashboard 浏览器中输入：http://192.168.1.168:32688/即可
删除部署

kubectl delete -f kubernetes-dashboard.yaml

<<'COMMENT'
deployment "kubernetes-dashboard" deleted
service "kubernetes-dashboard" deleted
COMMENT

查询Linux暴露出来的端口

netstat -tnlp

使用二进制文件搭建Dashboard

该小节主要配合kubernetes集群的的二进制安装。由于环境变量等问题，不支持单独使用，如有需要请进一步阅读相关博文。

官方文件路径：kubernetes/cluster/addons/dashboard
所有的资源可以在这里进行下载

系列博文

YAML文件

操作服务器IP：192.168.1.171，即K8s-master。在此之前，需要对服务器进行准备工作，具体操作请阅读Kubernetes集群之安全设置

dashboard-contoller.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      serviceAccountName: dashboard
      containers:
      - name: kubernetes-dashboard
        image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.6.0
        resources:
          # keep request = limit to keep this container in guaranteed class
          limits:
            cpu: 100m
            memory: 50Mi
          requests:
            cpu: 100m
            memory: 50Mi
        ports:
        - containerPort: 9090
        livenessProbe:
          httpGet:
            path: /
            port: 9090
          initialDelaySeconds: 30
          timeoutSeconds: 30
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"

dashboard-rbac.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: dashboard
  namespace: kube-system

---

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: dashboard
subjects:
  - kind: ServiceAccount
    name: dashboard
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io

dashboard-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  type: NodePort 
  selector:
    k8s-app: kubernetes-dashboard
  ports:
  - port: 80
    targetPort: 9090
    nodePort: 38888

创建Pod和service

kubectl create -f dashboard/
<<'COMMENT'
deployment "kubernetes-dashboard" created
serviceaccount "dashboard" created
clusterrolebinding "dashboard" created
service "kubernetes-dashboard" created
COMMENT

# 检查 controller
get pods --all-namespaces -o wide

<<'COMMENT'
NAMESPACE     NAME                                    READY     STATUS    RESTARTS   AGE       IP           NODE
default       my-nginx-3418754612-2zb9g               1/1       Running   0          23m       172.17.0.4   192.168.1.173
default       my-nginx-3418754612-qtdhd               1/1       Running   0          23m       172.17.0.5   192.168.1.173
default       nginx-ds-3srdx                          1/1       Running   0          17h       172.17.0.2   192.168.1.173
kube-system   kube-dns-3574069718-m6rmr               3/3       Running   0          28m       172.17.0.3   192.168.1.173
kube-system   kubernetes-dashboard-2970940268-n5df0   1/1       Running   0          59s       172.17.0.6   192.168.1.173
COMMENT

kubectl get svc --all-namespaces -o wide

<<'COMMENT'
NAMESPACE     NAME                   CLUSTER-IP      EXTERNAL-IP   PORT(S)         AGE       SELECTOR
default       kubernetes             10.254.0.1      <none>        443/TCP         21h       <none>
default       my-nginx               10.254.5.222    <none>        80/TCP          23m       run=my-nginx
default       nginx-ds               10.254.79.44    <nodes>       80:8966/TCP     17h       app=nginx-ds
kube-system   kube-dns               10.254.0.2      <none>        53/UDP,53/TCP   29m       k8s-app=kube-dns
kube-system   kubernetes-dashboard   10.254.139.40   <nodes>       80:8888/TCP     1m        k8s-app=kubernetes-dashboard
COMMENT

访问Dashboard

地址：http://192.168.1.173:38888

本作品由陈健采用知识共享署名-非商业性使用-相同方式共享 4.0 国际许可协议进行许可。

Deploy Dashboard With K8s

使用kubeadm搭建Dashboard

系列博文

下载yaml文件

修改yaml文件

部署

使用二进制文件搭建Dashboard

系列博文

YAML文件

创建Pod和service

访问Dashboard

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