kubernets 单节点安装

关闭防火墙和Selinux。

setenforce 0
systemctl stop firewalld
systemctl disable firewalld

配置EPEL源

 yum install epel-release

可以选择更换EPEL的源为清华大学的源镜像站。提高安装速度。（参考文档）

安装

yum install etcd kubernetes

修改配置文件

1：修改/etc/sysconfig/docker，其中OPTIONS的内容设置为
OPTIONS='--selinux-enabled=false --insecure-registry gcy.io --log-driver=journald'
2：修改/etc/kubernetes/apiserver，把--admission_control参数中的ServiceAccount删除。
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"

安装顺序启动以下服务

systemctl start etcd
systemctl start docker 
systemctl start kube-apiserver
systemctl start kube-controller-manager
systemctl start kube-scheduler
systemctl start kubelet
systemctl start kube-proxy

systemctl enable etcd
systemctl enable docker 
systemctl enable kube-apiserver
systemctl enable kube-controller-manager
systemctl enable kube-scheduler
systemctl enable kubelet
systemctl enable kube-proxy

报错

运行容器的时候，发现一直处于ContainerCreating状态，一是网络不通，二是没有找到证书文件
安装一下相关的包：
yum install *rhsm* -y
网络不通的情况下，就很麻烦了，我这里选择的是修改docker源
vim /etc/docker/daemon.json

{
"registry-mirrors": ["https://docker.mirrors.ustc.edu.cn"]
}

MySQL RC.yaml配置文件

kuberctl create -f mysql-rc.yaml
kbuerctl get rc

apiVersion: v1
kind: ReplicationController
metadata:
  name: mysql
spec:
  replicas: 1
  selector:
    app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - name: mysql
        image: mysql
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "123456"

MySQL SVC.yaml文件

kuberctl create -f mysql-svc.yaml
kubectl get pods

apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  ports:
    - port: 3306
  selector:
    app: mysql