配置kubernetes UI图形化界面

配置Kubernetes网络

在master和nodes上都需要安装flannel

yum install flannel

在master和nodes上都需要配置flannel

vi /etc/sysconfig/flanneld

# Flanneld configuration options

# etcd url location. Point this to the server where etcd runs
FLANNEL_ETCD_ENDPOINTS="http://etcd:2379"

# etcd config key. This is the configuration key that flannel queries
# For address range assignment
FLANNEL_ETCD_PREFIX="/atomic.io/network"

# Any additional options that you want to pass
#FLANNEL_OPTIONS=""

配置etcd中flannel的key,需要在etcd中进行配置

etcdctl mk /atomic.io/network/config '{ "Network": "192.168.0.0/16" }'

启动

在master节点上启动

systemctl enable flanneld.service

systemctl start flanneld.service

service docker restart

systemctl restart kube-apiserver.service

systemctl restart kube-controller-manager.service

systemctl restart kube-scheduler.service

在各个Nodes上启动

systemctl enable flanneld.service

systemctl start flanneld.service

service docker restart

systemctl restart kubelet.service

systemctl restart kube-proxy.service

运行 kubectl get pods --all-namespaces -o wide 看获取的ip地址是否正确

编辑一个kubernetes-dashboard.yaml文件

最新版本可以去官网下载

https://github.com/kubernetes/dashboard/blob/master/src/deploy/kubernetes-dashboard.yaml

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:

  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:

        args:

         -  --apiserver-host=http://10.182.169.33:8080

        livenessProbe:

          httpGet:

            path: /

            port:

          initialDelaySeconds:

          timeoutSeconds:

---

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:

    targetPort:

注意修改--apiserver-host=http://10.182.169.33:8080 指向自己的api server.

创建dashboard

kubectl create -f kubernetes-dashboard.yaml

kubectl get -f kubernetes-dashboard.yaml

发现deploy/kubernetes-dashboard-latest一直不在avaiable状态,通过下面命令查询

kubectl get pods --all-namespaces

发现kube-system的命名空间下,总是有个kubernetes-dashboard-latest-1590787137-pp8qd处于CrashLoopBackOff状态.

可以通过下面命令查看namespace的日志情况

kubectl describe po kubernetes-dashboard --namespace=kube-system

删除kubernetes-dashboard

因为没搞清楚什么原因,很想再试一次,删除命令如下:

kubectl delete -f kubernetes-dashboard.yaml

在运行kubectl get pods --all-namespaces发现总是有kube-system命名空间下的pod在运行.最后通过指定命名空间删除

kubectl delete --all pods --namespace=kube-system

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

注意,如果只删除pod会发现删完后又会有个同样的pod启动起来,删除deployment即可.

查看日志确定原因

最重要还是要看日志，最重要还是要看日志，最重要还是要看日志，重要事情说三遍，此问题浪费3个钟头时间 :(

kubectl logs -f kubernetes-dashboard-latest-3243398-thc7k -n kube-system

[root@k8s-master ~]# kubectl logs -f kubernetes-dashboard-latest-3243398-thc7k -n kube-system
Using HTTP port: 9090
Using apiserver-host location: http://k8s-master:8080
Creating API server client for http://k8s-master:8080
Error while initializing connection to Kubernetes apiserver. This most likely means that the cluster is misconfigured (e.g., it has invalid apiserver certificates or service accounts configuration) or the --apiserver-host param points to a server that does not exist. Reason: Get http://k8s-master:8080/version: dial tcp: lookup k8s-master on 202.96.134.33:53: no such host
Refer to the troubleshooting guide for more information: https://github.com/kubernetes/dashboard/blob/master/docs/user-guide/troubleshooting.md

发现是dns把k8s-master解析成202.96.134.33的地址了,修改kubernetes-dashboard.yaml中的apiserver-host=http://k8s-master:8080为

http://192.168.0.104:8080后,再进行create就成功.

访问http://192.168.0.104:8080/ui,界面如下:

点击weblogic Pod的日志,显示如下:

巴特西

配置kubernetes UI图形化界面

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