K8S_08_K8S的GUI资源管理插件-dashboard

dashboard 官方Github
https://github.com/kubernetes/dashboard
一、准备Dashboard镜像：
在hdss7-200.host.com(10.4.7.200)上面操作：
版本用的是1.8.3
docker pull k8scn/kubernetes-dashboard-amd64:v1.8.3



docker tag fcac9aa03fd6 harbor.od.com/public/dashboard:v1.8.3
docker login harbor.od.com
docker push harbor.od.com/public/dashboard:v1.8.3


二、准备资源配置清单

读官方yaml文件，进行修改。
https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dashboard/dashboard.yaml



mkdir -p /data/k8s-yaml/dashboard && cd /data/k8s-yaml/dashboard

2.1 rbac--->yaml [主要是创建用户和权限]

vim rbac.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
  name: kubernetes-dashboard-admin
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: kubernetes-dashboard-admin
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    addonmanager.kubernetes.io/mode: Reconcile
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard-admin
  namespace: kube-system
######++++++++



2.2 deployment----->yaml [ pod 控制器]
vi dp.yaml
apiVersion: apps/v1
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:
      priorityClassName: system-cluster-critical
      containers:
      - name: kubernetes-dashboard
        image: harbor.od.com/public/dashboard:v1.8.3
        resources:
          limits:
            cpu: 100m
            memory: 300Mi
          requests:
            cpu: 50m
            memory: 100Mi
        ports:
        - containerPort: 8443
          protocol: TCP
        args:
          # PLATFORM-SPECIFIC ARGS HERE
          - --auto-generate-certificates
        volumeMounts:
        - name: tmp-volume
          mountPath: /tmp
        livenessProbe:
          httpGet:
            scheme: HTTPS
            path: /
            port: 8443
          initialDelaySeconds: 30
          timeoutSeconds: 30
      volumes:
      - name: tmp-volume
        emptyDir: {}
      serviceAccountName: kubernetes-dashboard-admin
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"

2.3 service(svc)----->ymal [创建service资源]
vim svc.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:
  selector:
    k8s-app: kubernetes-dashboard
  ports:
  - port: 443
    targetPort: 8443


2.4 Ingress----->yaml
vim ingress.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  annotations:
    kubernetes.io/ingress.class: traefik
spec:
  rules:
  - host: dashboard.od.com
    http:
      paths:
      - backend:
          serviceName: kubernetes-dashboard
          servicePort: 443


三、把这个资源清单应用到K8S集群里面
在任意一个节点上面操作（10.4.7.21 或者 10.4.7.22）
kubectl apply -f http://k8s-yaml.od.com/dashboard/rbac.yaml
kubectl apply -f http://k8s-yaml.od.com/dashboard/dp.yaml
kubectl apply -f http://k8s-yaml.od.com/dashboard/svc.yaml
kubectl apply -f http://k8s-yaml.od.com/dashboard/ingress.yaml

##########++++++++++++=
kubectl get pods -o wide -n kube-system


kubectl get svc -n kube-system


kubectl get ingress -n kube-system


4、配置DNS，在10.4.7.11上面添加主机记录
vim /var/named/od.com.zone


systemctl restart named
dig -t A dashboard.od.com @10.4.7.11 +short


在hdss7-21上面用coredns (192.168.0.2) 解析dashboard.od.com

dig -t A dashboard.od.com @192.168.0.2 +short


浏览器打开 http://dashboard.od.com