CentOS7安装K8S

喜欢ヅ旅行 2022-02-19 04:51 193阅读 0赞

1、关闭自带防火墙

systemctl disable firewalld
    systemctl stop firewalld

2、安装etcd和Kubernetes

yum install -y etcd kubernetes

3、按顺序启动所有服务

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

> 安装版：
> 
> etcd v3.3.11
> 
> Kubernetes v1.5.2
> 
> Docker v1.13.1

> 注意：Docker 1.13以上版本默认将ip-forward设成false了，导致后续kubernetes安装的节点服务在对外暴露时会被防火墙拦截。
> 
> 解决方法：
> 
>     vim /etc/sysctl.conf
>     
>     net.ipv4.ip_forward=1
> 
> 重启系统，查看防火墙配置
> 
>     iptables -S
>     
>     显示结果：
>     ...
>     -P FORWARD ACCEPT
>     ...
> 
> [github上有个issue《docker 1.13 container is not reachable after giving IP-address \#211》][github_issue_docker 1.13 container is not reachable after giving IP-address _211]

4、安装MySQL服务

编写RC脚本：mysql-rc.yaml

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"

运行脚本：

kubectl create -f mysql-rc.yaml

编写Service服务脚本：mysql-svc.yaml

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

运行脚本：

kubectl create -f mysql-svc.yaml

4、安装Tomcat Web服务

编写RC脚本：myweb-rc.yaml

apiVersion: v1
    kind: ReplicationController
    metadata: 
      name: myweb
    spec:
      replicas: 2
      selector:
        app: myweb
      template:
        metadata:
          labels:
            app: myweb
        spec:
          containers:
          - name: myweb
            image: kubeguide/tomcat-app:v1
            ports:
            - containerPort: 8080

编写Service服务脚本：myweb-svc.yaml

apiVersion: v1
    kind: Service
    metadata: 
      name: myweb
    spec:
      type: NodePort
      ports:
        - port: 8080
          nodePort: 30001
      selector:
        app: myweb

运行脚本：

kubectl create -f myweb-svc.yaml

5、访问Tomcat Web服务

http://x.x.x.x:30001

[github_issue_docker 1.13 container is not reachable after giving IP-address _211]: https://github.com/moby/moby/pull/28257