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主机ip地址：10.200.3.81

系统版本：

[root@localhost ~]# cat /etc/redhat-release 
CentOS Linux release 7.4.1708 (Core)

1、配置yum源：

[root@localhost ~]# cat >/etc/yum.repos.d/kubernetes.repo<<-EOF 
[virt7-docker-common-release] 
name=virt7-docker-common-release 
baseurl=http://cbs.centos.org/repos/virt7-docker-common-release/x86_64/os/ 
gpgcheck=0 
EOF 

2、查看当前yum里的Kubernetes版本：

[root@localhost ~]# yum info kubernetes
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.shu.edu.cn
 * extras: ftp.tsukuba.wide.ad.jp
 * updates: mirrors.shu.edu.cn
Installed Packages
Name        : kubernetes
Arch        : x86_64
Version     : 1.5.2
Release     : 0.7.git269f928.el7
Size        : 0.0  
Repo        : installed
From repo   : extras
Summary     : Container cluster management
URL         : k8s.io/kubernetes
License     : ASL 2.0
Description : Container cluster management

3、安装所需要的包：

[root@localhost ~]# yum -y install --enablerepo=virt7-docker-common-release kubernetes etcd

4、配置文件的修改：

修改配置文件：/etc/kubernetes/apiserver

KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"     #这里把127.0.0.1改成0.0.0.0 
 
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,Security 
ContextDeny,ResourceQuota"      
#去掉ServiceAccount即可； 

5、查看docker的版本：[上面命令并没有加入docker，但它却自动安装了]

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

[root@localhost ~]#docker version Client:  Version:         1.13.1  API version:     1.26  Package version: <unknown>  Go version:      go1.8.3  Git commit:      774336d/1.13.1  Built:           Wed Mar  7 17:06:16 2018  OS/Arch:         linux/amd64   Server:  Version:         1.13.1  API version:     1.26 (minimum version 1.12)  Package version: <unknown>  Go version:      go1.8.3  Git commit:      774336d/1.13.1  Built:           Wed Mar  7 17:06:16 2018  OS/Arch:         linux/amd64  Experimental:    false

6、 把服务添加到启动项，并启动服务：

for SERVICE in docker etcd kube-apiserver kube-controller-manager kube-scheduler kube-proxy kubelet; do  
 
    systemctl start $SERVICE 
    systemctl enable $SERVICE 
 
done 

7、验证安装成果：

#当前主机上没有任何镜像，接下来我们创建一个pod实例；

[root@localhost ~]# docker images 
 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE 

使用kubectl命令创建一个nginx实例:

创建之前先docker pull nginx一个镜像到本地:

命令行创建nginx pods

[root@localhost ~]#kubectl run my-nginx --image=nginx --replicas=1 --port=80

命令行创建service

# kubectl expose deployment my-nginx --port=8888 --target-port=80 --external-ip=10.200.3.81

查看pod实例分配的Ip地址；

[root@localhost ~]# kubectl get pods -o wide
NAME                       READY     STATUS    RESTARTS   AGE       IP           NODE
my-nginx-379829228-mpm5f   1/1       Running   0          51m       172.17.0.2   127.0.0.1

查看Kubetnetes里的service[简写svc]，可以看到指定了外网IP地址：10.200.3.81

[root@localhost ~]# kubectl get svc
NAME         CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
kubernetes   10.254.0.1      <none>        443/TCP    1h
my-nginx     10.254.81.204   10.200.3.81   8888/TCP   41m

查看nginx服务的状态：

[root@localhost ~]# curl -I 10.200.3.81:8888
HTTP/1.1 200 OK
Server: nginx/1.13.12
Date: Thu, 10 May 2018 08:42:28 GMT
Content-Type: text/html
Content-Length: 612
Last-Modified: Mon, 09 Apr 2018 16:01:09 GMT
Connection: keep-alive
ETag: "5acb8e45-264"
Accept-Ranges: bytes

这样单节点的Kubernetes就已经跑起来了，接下来就是安装kubernetes-dashboard ，下载kubernetes-dashboard.yaml文件，修改一下即可；因为我使用的是公网的docker镜像，所以先下载dashborad的镜像到本地仓库.

[root@localhost ~]#docker pull docker.io/siriuszg/kubernetes-dashboard-amd64:v1.5.1

kubernetes-dashboard.yaml文件如下：

[root@localhost ~]# cat kubernetes-dashboard.yaml 
kind: Deployment 
apiVersion: extensions/v1beta1 
metadata: 
  labels: 
    app: kubernetes-dashboard 
  name: kubernetes-dashboard 
  namespace: kube-system 
spec: 
  replicas: 1 
  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: Always 
        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://10.200.3.81:8080 
        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 

创建实例：

# kubectl create -f kubernetes-dashboard.yaml 

查看是否成功运行：

[root@localhost ~]# kubectl get pods --all-namespaces  
NAMESPACE     NAME                                    READY     STATUS    RESTARTS   AGE
default       my-nginx-379829228-mpm5f                1/1       Running   0          59m
kube-system   kubernetes-dashboard-3162153223-2s0qb   1/1       Running   0          40m

启动成功就可以打开网页看到效果啦：（输入http://10.200.3.81:8080/ui 即可跳转到如下地址）

 

 号外：

kubectl get pods 状态一直为ContainerCreating解决:

跟踪状态：

可以使用kubectl describe pods Pod_Name来查看是什么原因

如果报错如下，

需要安装rhsm

#yum install *rhsm* -y

再重启服务即可

 

 参考文档：https://www.58jb.com/html/152.html

                   https://www.cnblogs.com/stromliu/p/8567741.html