CentOS7搭建Kubernetes dashboard
一 环境声明
Centos7三台,master节点一台,node节点两台
Dashboard需要一个镜像,需要执行命令下载:
docker pull mritd/kubernetes-dashboard-amd64:v1.5.1
ps:还有很多其他的镜像也能搭建dashboard,不过这个版本是汉化版

注意:两个node节点都需要下载此镜像,master节点不用,因为dashboard的pod会被master调度到两台node之一去创建,不会在master本地创建。

二.具体操作
以下操作全部在master节点执行:
1.编辑dashboard-controller.yaml,创建dashboard的pod
注意修改红色字体的部分!
vim dashboard-controller.yaml,内容如下:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: kubernetes-dashboard
namespace: kube-system
labels:
k8s-app: kubernetes-dashboard
kubernetes.io/cluster-service: "true"
spec:
selector:
matchLabels:
k8s-app: kubernetes-dashboard
template:
metadata:
labels:
k8s-app: kubernetes-dashboard
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ''
scheduler.alpha.kubernetes.io/tolerations: '[{"key":"CriticalAddonsOnly", "operator":"Exists"}]'
spec:
containers:

  • name: kubernetes-dashboard
    image: mritd/kubernetes-dashboard-amd64:v1.5.1
    imagePullPolicy: IfNotPresent
    resources:
    limits:
    cpu: 100m
    memory: 50Mi
    requests:
    cpu: 100m
    memory: 50Mi
    ports:

    • --apiserver-host=http://10.0.2.90:8080
      livenessProbe:
      httpGet:
      path: /
      port: 9090
      initialDelaySeconds: 30
      timeoutSeconds: 30

    • containerPort: 9090
      args:

    红色字体解释:

    1. mritd/kubernetes-dashboard-amd64:v1.5.1:dashboard的镜像,如果你的不是此镜像,请注意修改

    2. --apiserver-host=http://10.0.2.90:8080,填写你master的apiserver地址,默认端口一般都是8080

    ===========================================================

    OK,现在开始编辑dashboard-service.yaml,将dashboard的访问端口映射到两台node宿主机的端口,以便外部访问。
    vim dashboard-service.yaml,内容如下:
    apiVersion: v1
    kind: Service
    metadata:
    name: kubernetes-dashboard
    namespace: kube-system
    labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    spec:
    type: NodePort
    selector:
    k8s-app: kubernetes-dashboard
    ports:

    • port: 80
      targetPort: 9090
      nodePort: 30003

    红色字体解释:
    port是指service的端口
    targetport是指pod的端口
    nodePort是指宿主机即node的端口,k8s外部就通过这个端口访问dashboard

    创建dashboard
    kubectl create -f dashboard-controller.yaml
    结果显示:deployment "kubernetes-dashboard" created

    kubectl create -f dashboard-service.yaml
    结果显示:service "kubernetes-dashboard" created

    查看创建结果:
    [root@k8s-master yaml]# kubectl get pods --namespace=kube-system -o wide
    NAME READY STATUS RESTARTS AGE IP NODE
    kubernetes-dashboard-56bc76b6bb-b6kfx 1/1 Running 0 32s 172.18.0.194 node1

    [root@k8s-master yaml]# kubectl get svc --namespace=kube-system
    NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
    kubernetes-dashboard NodePort 172.18.0.196 80:30003/TCP 13s

    OK,创建成功,接下来就可以通过浏览器访问node节点(两个node任选一个都可以)的30003端口体验kubernetes-dashboard: