一、先决条件
1、首先你必有现成的Kubernetes集群，如果现在你一无所有，请参考：
http://zlyang.blog.51cto.com/1196234/1951010
2、建议采用etcd集群，搭建过程请参考：
http://zlyang.blog.51cto.com/1196234/1951164
二、部署Kubernetes-dashboard
[所有机器：Master、Node1、Node2]
1、安装flannel(flannel为管理Containers网络)
[[email protected] ~]# yum -y install epel-release flannel
2、配置flanel
[Master]
[[email protected] ~]# vim /etc/sysconfig/flanneld
# Flanneld configuration options
# etcd url location. Point this to the server where etcd runs
FLANNEL_ETCD_ENDPOINTS="http://k8s-master: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=""
[Node]
[[email protected] ~]# vim /etc/sysconfig/flanneld
# Flanneld configuration options
# etcd url location. Point this to the server where etcd runs
FLANNEL_ETCD_ENDPOINTS="http://k8s-master: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=""
3、添加Etcd网络配置
[Master]
[[email protected] ~]# mkdir -p /atomic.io/network/
[[email protected] ~]# chmod -R 777 /atomic.io
[[email protected] ~]# etcdctl mk /atomic.io/network/config ‘{"Network":"10.254.0.0/16"}‘
****** 注：此IP为/etc/kubernetes/apiserver中｛KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16" ｝填写的地址
4、启动flannel服务
[所有机器]
[[email protected] ~]# systemctl start flanneld.service
[[email protected] ~]# systemctl enable flanneld.service
5、修改Kubernetes所有Node节点kubelet设置中添加dns信息，否则会报错
[Node1/Node2]
[[email protected] ~]# vim /etc/kubernetes/kubelet
###
# kubernetes kubelet (minion) config
# The address for the info server to serve on (set to 0.0.0.0 or "" for all interfaces)
KUBELET_ADDRESS="--address=0.0.0.0"
# The port for the info server to serve on
KUBELET_PORT="--port=10250"
# You may leave this blank to use the actual hostname
KUBELET_HOSTNAME="--hostname-override=k8s-node1"
# location of the api-server
KUBELET_API_SERVER="--api-servers=http://k8s-master:8080"
# pod infrastructure container
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
# Add your own!
#KUBELET_ARGS=""
KUBELET_ARGS="--cluster-dns=223.5.5.5 --cluster-domain=k8s-master"
6、重启Node上的服务
[Master]
for SERVICES in flanneld etcd kube-apiserver kube-controller-manager kube-scheduler; do systemctl restart $SERVICES; systemctl enable $SERVICES; systemctl status $SERVICES ; done
[Node]
for SERVICES in flanneld kube-proxy kubelet docker; do systemctl restart $SERVICES; systemctl enable $SERVICES; systemctl status $SERVICES ; done
7、安装dashboard
[Node1/Node2]
a、导入images
***由于墙的原因，需要先导入images，如果你可以翻墙，忽略此步骤
下载地址：
b、导入：
[[email protected] ~]# docker load < kubernetes-dashboard.tar.gz
c、查看
[[email protected] ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
gcr.io/google_containers/kubernetes-dashboard-amd64 v1.6.2 bd4d50b8499e 8 days ago 139 MB
8、创建dashboard容器
[Master]
a、下载kubernetes-dashboar.yaml文件
[[email protected] ~]# git clone https://github.com/jdedu/kubernetes.git
b、修改其中标红项
[[email protected] ~]# vim kubernetes/kubernetes-dashboard.yaml
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
labels:
app: kubernetes-dashboard
version: v1.1.1
name: kubernetes-dashboard
namespace: kube-system
spec:
replicas: 1
selector:
matchLabels:
app: kubernetes-dashboard
template:
metadata:
labels:
app: kubernetes-dashboard
spec:
containers:
- name: kubernetes-dashboard
image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.6.2
imagePullPolicy: Always
ports:
- containerPort: 9090
protocol: TCP
args:
- --apiserver-host=http://192.168.80.130:8080
livenessProbe:
httpGet:
path: /
port: 9090
initialDelaySeconds: 30
timeoutSeconds: 30
---
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
9、创建dashboard容器
[Master]
[[email protected] ~]# kubectl create -f kubernetes-dashboard.yaml
deployment "kubernetes-dashboard" created
service "kubernetes-dashboard" created
10、查看状态
a、查看pods
[[email protected] ~]# kubectl get pods --namespace=kube-system
NAME READY STATUS RESTARTS AGE
kubernetes-dashboard-1607234690-3bnk2 0/1 ContainerCreating 0 34s
b、查看构建详细信息
[[email protected] ~]# kubectl describe pods kubernetes-dashboard-1607234690-3bnk2 --namespace=kube-system
Name: kubernetes-dashboard-1607234690-3bnk2
Namespace: kube-system
Node: k8s-node2/192.168.80.132
Start Time: Thu, 03 Aug 2017 17:15:50 +0800
Labels: app=kubernetes-dashboard
pod-template-hash=1607234690
Status: Pending
IP:
Controllers: ReplicaSet/kubernetes-dashboard-1607234690
Containers:
kubernetes-dashboard:
Container ID:
Image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.6.2
Image ID:
Port: 9090/TCP
Args:
--apiserver-host=http://192.168.80.130:8080
State: Waiting
Reason: ContainerCreating
Ready: False
Restart Count: 0
Liveness: http-get http://:9090/ delay=30s timeout=30s period=10s #success=1 #failure=3
Volume Mounts: <none>
Environment Variables: <none>
Conditions:
Type Status
Initialized True
Ready False
PodScheduled True
No volumes.
QoS Class: BestEffort
Tolerations: <none>
Events:
FirstSeen LastSeen Count From SubObjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
2m 2m 1 {default-scheduler } Normal Scheduled Successfully assigned kubernetes-dashboard-1607234690-3bnk2 to k8s-node2
三、测试
a、在测试机上添加host信息
192.168.80.130 k8s-master
b、使用浏览器输入:http://k8s-master:8080/ui
四、错误
[错误1]
[[email protected] ~]# kubectl describe pods kubernetes-dashboard-1607234690-3bnk2 --namespace=kube-system
1s 1s 1 {kubelet k8s-node2} Warning FailedSync Error syncing pod, skipping: failed to "StartContainer" for "kubernetes-dashboard" with CrashLoopBackOff: "Back-off 10s restarting failed container=kubernetes-dashboard pod=kubernetes-dashboard-980055440-l9zl5_kube-system(870d02e1-7810-11e7-9517-000c296a54e8)"
再次使用kubectl logs查看具体错误信息
[[email protected] ~]# kubectl logs kubernetes-dashboard-1607234690-l6gfk --namespace=kube-system
No request provided. Skipping authorization header
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 223.5.5.5:53: no such host
Refer to the troubleshooting guide for more information: https://github.com/kubernetes/dashboard/blob/master/docs/user-guide/troubleshooting.md
[解决方案]
[[email protected] ~]# vim kubenetes-dashboard.yaml
- --apiserver改成ip，不要使用域名
此过程中可能会遇到很多问题，如果需要帮助，请发邮件至：[email protected]