Kubernetes集群UI及主机资源监控

1. Kubernetes dashboard作用

• 通过dashboard能够直观了解Kubernetes集群中运行的资源对象，可以直接管理（创建、删除、重启等操作）资源对象
  

2. 获取Kubernetes dashboard资源清单文件

• 下载kubernetes-dashboard配置文件

cd /data/k8s-work
wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.5.1/aio/deploy/recommended.yaml

3. 修改并部署kubernetes dashboard资源清单文件

• 修改kubernetes-dashboard配置文件recommended.yaml文件

vim recommended.yaml

修改后recommended.yaml内容，如下所示

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:
  #添加type: NodePort,便于暴露服务
  type: NodePort
  ports:
    - port: 443
      targetPort: 8443
	  #添加nodePort: 30000 配置项，将kubernetes-dashboard服务映射到主机的30000端口
      nodePort: 30000
  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

---

#添加service-account-token配置，便于kubernetes-dashboard登录使用（切记：一定要加，否则无法获取到登录token）
apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-token
  namespace: kubernetes-dashboard
  annotations:
    kubernetes.io/service-account.name: "kubernetes-dashboard"   
type: kubernetes.io/service-account-token  

---

kind: ConfigMap
apiVersion: v1
metadata:
  labels