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
https://images2015.cnblogs.com/blog/892532/201705/892532-20170508192858910-2001119396.png
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-latestnamespace: 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>limits: cpu: 100m
memory: 50Mi
requests:
cpu: 100m
memory: 50Mi
ports:
- containerPort: 9090 args:
---apiserver-host=http://10.182.169.33:8080
livenessProbe:
httpGet:
path: /
port: 9090
initialDelaySeconds: 30
timeoutSeconds: 30
---
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
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
# 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.
https://images2015.cnblogs.com/blog/892532/201705/892532-20170508201012285-276069850.png
访问http://192.168.0.104:8080/ui,界面如下:
https://images2015.cnblogs.com/blog/892532/201705/892532-20170508201117004-53243026.png
https://images2015.cnblogs.com/blog/892532/201705/892532-20170508201205988-1912210707.png
点击weblogic Pod的日志,显示如下:
https://images2015.cnblogs.com/blog/892532/201705/892532-20170508201306051-547072780.png
页:
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