k8s的简单搭建

1、一般虚拟机为动态ip，而k8s搭建需要在配置文件中添加ip，如果ip动态变化，那配置文件中的ip也要相应变化。所以首先将虚拟机ip设置为静态ip。

• ifconfig      ：查看自己网卡名称，我的是ens33

• vi /etc/sysconfig/network-scripts/ifcfg-ens33   ：修改配置文件

            将BOOTPROTO改为static

           增加 IPADDR=192.168.250.101
                   GATEWAY=192.168.250.2
                   NM_CONTROLLED = no
                   DNS1 =192.168.250.2

• systemctl restart network    ：重新启动就ok了
• 设置为静态ip后，不能ping域名，需设置   vi /etc/resolv.conf

  nameserver 114.114.114.114
  nameserver 8.8.8.8
  

   

2、配置master(192.168.250.101)

• 安装etcd
• 关闭防火墙 ，下载k8s

        systemctl disable firewalld

        systemctl stop firewalld
        yum install -y  kubernetes

• 启动

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

• vi /etc/kubernetes/apiserve  :  这是配置文件，如果主机ip变了，就需要更改文件里的ip

       

 systemctl restart kube-apiserver：重新启动，所修改的便生效

• vi /etc/kubernetes/controller-manager   

systemctl restart kube-controller-manager

• vi /etc/kubernetes/scheduler    

systemctl restart kube-scheduler

• kubectl get cs ：检查是否安装正确

• 3、配置node(192.168.250.102)

node上docker与k8s的版本需对应

• 下载k8s与上边的一样
• 启动

    systemctl start docker

    systemctl start kube-proxy

    systemctl start kubelet

• vi /etc/kubernetes/config    

systemctl restart kube-proxy

• vi /etc/kubernetes/kubelet  

创建 vi /var/lib/kubelet/kubeconfig 向master注册

apiVersion: v1
kind: Config
users:
- name: kubelet
clusters:
- name: kubernetes
  cluster:
    server: http://192.168.250.101:8080
contexts:
- context:
    cluster: kubernetes
    user: kubelet
  name: service-account-context
current-context: service-account-context

systemctl restart kubelet

• 在master      执行 kubectl get node 验证节点是否安装成功

  

  并创建简单的nginx5.yaml文件

  apiVersion: v1
  kind: Pod
  metadata:
    name: nginx77
    labels:
      app: nginx
    namespace: default
  spec:
    containers:
    - image: hub.mfwdev.com/kubernetes/nginx
  
      imagePullPolicy: IfNotPresent
      name: nginx-deployment-6499c587d8
    restartPolicy: Always
  

   kubectl apply -f nginx5.yaml

• kubectl get pods