DashBoard 集群部署

搭建K8s DashBoard

集群結構：

類型	主機名	ip
Master	k8s_master	192.168.3.216
Node	k8s_client1	192.168.3.217
Node	k8s_client2	192.168.3.219

以下操作都在k8s_master上執行：
一、鏡像下載
[root@k8s_master ~]# docker pull docker.io/siriuszg/kubernetes-dashboard-amd64:v1.5.1
Trying to pull repository docker.io/siriuszg/kubernetes-dashboard-amd64 ...

sha256:d0aebe2567a6b11d090403746f63df9dccd32aec9192decfd3794b0cce528930: Pulling from docker.io/siriuszg/kubernetes-dashboard-amd64
9d25d3817204: Pull complete
Digest: sha256:d0aebe2567a6b11d090403746f63df9dccd32aec9192decfd3794b0cce528930
Status: Downloaded newer image for docker.io/siriuszg/kubernetes-dashboard-amd64:v1.5.1

[root@k8s_master ~]# docker pull registry.access.redhat.com/rhel7/pod-infrastructure
Using default tag: latest
Trying to pull repository registry.access.redhat.com/rhel7/pod-infrastructure ...
Pulling repository registry.access.redhat.com/rhel7/pod-infrastructure
c99574180d51: Pull complete
1ada7c88ed3d: Pull complete

bcb4a96d0b39: Pull complete
Status: Downloaded newer image for registry.access.redhat.com/rhel7/pod-infrastructure:latest

二、配置kubernetes的dashboard
1、需要以下兩個kubernetes-dashboard和dashboard-service配置文件。
kubernetes-dashboard.yaml
#需修改images和增加- --apiserver-host=http://192.168.3.216:8080

kind: Deployment
apiVersion: extensions/v1beta1
metadata:
labels:
app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
app: kubernetes-dashboard
template:
metadata:
labels:
app: kubernetes-dashboard

Comment the following annotation if Dashboard must not be deployed on master

  annotations:
    scheduler.alpha.kubernetes.io/tolerations: |
      [
        {
          "key": "dedicated",
          "operator": "Equal",
          "value": "master",
          "effect": "NoSchedule"
        }
      ]
spec:
  containers:
  - name: kubernetes-dashboard
    image: docker.io/siriuszg/kubernetes-dashboard-amd64:v1.5.1
    imagePullPolicy: IfNotPresent
    ports:
    - containerPort: 9090
      protocol: TCP
    args:
      # Uncomment the following line to manually specify Kubernetes API server Host
      # If not specified, Dashboard will attempt to auto discover the API server and connect
      # to it. Uncomment only if the default does not work.
    - --apiserver-host=http://192.168.3.216:8080
    livenessProbe:
      httpGet:
        path: /
        port: 9090
      initialDelaySeconds: 30
      timeoutSeconds: 30

dashboard-service.yaml
#不需要做修改
kind: Service
apiVersion: v1
metadata:
labels:
app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kube-system
spec:
type: NodePort
ports:

• port: 80
  targetPort: 9090
  selector:
  app: kubernetes-dashboard

2、執行啟動，dashboard搭建完成。
[root@k8s_master ~]# kubectl create -f kubernetes-dashboard.yaml
deployment "kubernetes-dashboard" created
[root@k8s_master ~]# kubectl create -f dashboard-service.yaml
service "kubernetes-dashboard" created

3、驗證：
執行以下命令
[root@k8s_master ~]# kubectl get deployment --all-namespaces
NAMESPACE NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
kube-system kubernetes-dashboard 1 1 1 1 1m
[root@k8s_master ~]# kubectl get svc --all-namespaces
NAMESPACE NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes 10.254.0.1 <none> 443/TCP 5d
kube-system kubernetes-dashboard 10.254.141.158 <nodes> 80:31633/TCP 1m
[root@k8s_master ~]# kubectl get pod -o wide --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE
kube-system kubernetes-dashboard-1270457039-t1z15 1/1 Running 0 2m 10.8.43.2 192.168.3.219

4、界面查看，瀏覽器輸入：http://192.168.3.216:8080/ui

5、刪除應用
[root@k8s_master ~]# kubectl delete deployment kubernetes-dashboard --namespace=kube-system
deployment "kubernetes-dashboard" deleted
[root@k8s_master ~]# kubectl delete svc kubernetes-dashboard --namespace=kube-system
service "kubernetes-dashboard" deleted

報錯解決:
1、無法拉取鏡像registry.access.redhat.com/rhel7/pod-infrastructure:latest
[root@k8s_master ~]# docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest
Trying to pull repository registry.access.redhat.com/rhel7/pod-infrastructure ...
open /etc/docker/certs.d/registry.access.redhat.com/redhat-ca.crt: no such file or directory
解決方法：
[root@registry ~]# yum install rhsm -y

2、瀏覽器打開ui界面報錯
{
"kind": "Status",
"apiVersion": "v1",
"metadata": {},
"status": "Failure",
"message": "no endpoints available for service \"kubernetes-dashboard\"",
"reason": "ServiceUnavailable",
"code": 503
}
解決方法：
KUBE_ADMISSION_CONTROL配置中默認需要認證，編輯配置文件，在KUBE_ADMISSION_CONTROL中，去除SecurityContextDeny,ServiceAccount
[root@k8s_master ~]# vim /etc/kubernetes/apiserver
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota"
重啟服務，正常打開

kubernetes集群部署DashBoard