安装kubernetes

准备一台centos7

1） 关闭firewalld 和 selinux

systemctl stop firewalld

systemctl disable firewalld

setenforce 0

2）安装etcd和kubernetes

yum install -y etcd kubernetes

3）修改配置文件

vi /etc/sysconfig/docker

将--selinux-enabled 改为 --selinux-enabled=false --insecure-registry gcr.io

vi /etc/kubernetes/apiserver

把--admission_control参数中的ServiceAccount删除

4）准备工作

yum install python-rhsm-certificates

如果提示python-rhsm-certificates-1.19.10-1.el7_4.x86_64 被已安装的 subscription-manager-rhsm-certificates-

1.20.11-1.el7.centos.x86_64 取代

wget http://mirror.centos.org/centos/7/os/x86_64/Packages/python-rhsm-certificates-1.19.10-

1.el7_4.x86_64.rpm

rpm2cpio python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm |cpio -iv --to-stdout ./etc/r hsm/ca/redhat-

uep.pem > /etc/r hsm/ca/redhat-uep.pem

配置docker加速器

vi /etc/docker/daemon.json//加入如下内容

{

"registry-mirrors": ["https://dhq9bx4f.mirror.aliyuncs.com"]

}

5）按顺序启动所有服务

for s in etcd docker kube-apiserver kube-controller-manager kube-scheduler kubelet kube-proxy

do

systemctl start $s

done

6）创建一个rc文件

vim mysql-rc.yaml 

apiVersion: v1kind: ReplicationControllermetadata:  name: mysqlspec:  replicas: 1  selector:    app: mysql  template:    metadata:      labels:        app: mysql    spec:      containers:      - name: mysql        image: mysql:5.6        ports:        - containerPort: 3306        env:        - name: MYSQL_ROOT_PASSWORD          value: "123456"

　　

docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest

docker pull mysql:5.6

kubectl create -f mysql-rc.yaml

kubectl get rc

kubectl get pods

7）创建一个svc文件

 vim mysql-svc.yaml 

apiVersion: v1kind: Servicemetadata:  name: mysqlspec:  ports:    - port: 3306  selector:    app: mysql

　　

kubectl create -f mysql-svc.yaml

kubectl get svc

8）创建web rc文件

vim web-rc.yaml 

kind: ReplicationControllermetadata:  name: mywebspec:  replicas: 1  selector:    app: myweb  template:    metadata:      labels:        app: myweb    spec:      containers:        - name: myweb          image: kubeguide/tomcat-app:v1          ports:          - containerPort: 8080          env:          - name: MYSQL_SERVICE_HOST            value: '10.254.170.174' #这里的IP需要通过kubectl get svc 查看mysql的cluster ip          - name: MYSQL_SERVICE_PORT            value: '3306'

　　

[root@weifeng04 ~]# kubectl get svcNAME         CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGEkubernetes   10.254.0.1       
     
              443/TCP          3dmysql        10.254.170.174   
      
               3306/TCP         3d
      
     

　　

kubectl create -f web-rc.yaml

9）创建web svc文件

vim web-svc.yamly

kind: Servicemetadata:  name: mywebspec:  type: NodePort  ports:    - port: 8080      nodePort: 30001  selector:    app: myweb

　　

kubectl create -f web-svc.yaml

10）访问

iptables -P FORWARD ACCEPT

curl 本机ip:30001/demo/ 或浏览器

[root@weifeng04 ~]# curl 192.168.20.99:30001/demo/
     	      
Congratulations!!