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基于kubernetes集群部署DashBoard

发布时间:

  在之前一篇文章:Centos7部署Kubernetes集群,中已经搭建了基本的K8s集群,本文将在此基础之上继续搭建K8s DashBoard。


1、yaml文件

  编辑dashboard.yaml,注意或更改以下红色部分:



apiVersion: extensions/v1beta1
kind: Deployment
metadata:
# Keep the name in sync with image version and
# gce/coreos/kube-manifests/addons/dashboard counterparts
name: kubernetes-dashboard-latest
namespace: kube-system
spec:
replicas: 1
template:
metadata:
labels:
k8s-app: kubernetes-dashboard
version: latest
kubernetes.io/cluster-service: "true"
spec:
containers:
- name: kubernetes-dashboard
image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.5.1
resources:
# keep request = limit to keep this container in guaranteed class
limits:
cpu: 100m
memory: 50Mi
requests:
cpu: 100m
memory: 50Mi
ports:
- containerPort: 9090
args:
- --apiserver-host=http://10.0.251.148:8080
livenessProbe:
httpGet:
path: /
port: 9090
initialDelaySeconds: 30
timeoutSeconds: 30

  编辑dashboardsvc.yaml文件:



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

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2、镜像准备

  在dashboard.yaml中定义了dashboard所用的镜像:gcr.io/google_containers/kubernetes-dashboard-amd64:v1.5.1(当然你可以选择其他的版本),另外,启动k8s的pod还需要一个额外的镜像:registry.access.redhat.com/rhel7/pod-infrastructure:latest(node中,/etc/kubernetes/kubelet的配置),由于一些众所周知的原因,这两个镜像在国内是下载不下来的,以下介绍如何准备这两个镜像。


2.1 国外下载,国内导入

  从海外的服务器上pull下来对应的镜像,之后通过docker save保存成tar包,将tar包传回国内,在每个node上执行docker load将镜像导入。类似的命令如下:



海外服务器执行:
docker save gcr.io/google_containers/kubernetes-dashboard-amd64:v1.5.1 > dashboard.tar
docker save registry.access.redhat.com/rhel7/pod-infrastructure:latest > podinfrastructure.tar
scp *.tar root@你国内的外网IP:/home/tar
各个node上执行:
docker load < dashboard.tar
docker load < podinfrastructure.tar

2.2 *

  在node所在同网段(相同交换机)内,搭建一个可以正常访问google、*等网站的fq网关,将集群中所有机器的GATEWAY指向该地址,之后*敉纭U庋械幕骶湍芄徽O略卣饬礁鼍迪窳恕


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3、启动

  在master执行如下命令:



kubectl create -f dashboard.yaml
kubectl create -f dashboardsvc.yaml

  之后,dashboard搭建完成。


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4、验证

  命令验证,master上执行如下命令:



[root@k8s-master ~]# kubectl get deployment --all-namespaces
NAMESPACE NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
kube-system kubernetes-dashboard-latest 1 1 1 1 1h
[root@k8s-master ~]# kubectl get svc --all-namespaces
NAMESPACE NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes 10.254.0.1 443/TCP 9d
kube-system kubernetes-dashboard 10.254.44.119 80/TCP 1h
[root@k8s-master ~]# kubectl get pod -o wide --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE
kube-system kubernetes-dashboard-latest-3866786896-vsf3h 1/1 Running 0 1h 10.0.82.2 k8s-node-1

  界面验证,浏览器访问:http://10.0.251.148:8080/ui



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5、销毁应用

  在master上执行:



kubectl delete deployment kubernetes-dashboard-latest --namespace=kube-system
kubectl delete svc kubernetes-dashboard --namespace=kube-system

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