CentOS 7.6 安装 Kubernetes（k8s）

一、安装 Docker

1、卸载旧版本

yum remove -y docker docker-common docker-selinux docker-engine

2、添加资源库

 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.r
epo

3. yum makecache fast
4. 检索Docker版本，选择版本进行安装
5. yum install -y docker-ce-18.06.3.ce-3.el7 或者直接执行yum install -y docker-ce
6. 启动docker
7. 查看docker版本:docker info 、docker version
   一、使用kubeadm部署k8s单master集群(https://www.cnblogs.com/pekkle/p/10545145.html)、(htt
   ps://www.cnblogs.com/technology178/p/13547342.html)
   master1:192.168.29.101
   node1:192.168.29.102
   node2:192.168.29.103
   修改主机名
   hostnamectl set-hostname master01 #在master节点执行
   hostnamectl set-hostname node01 #在node01节点执行
   hostnamectl set-hostname node02 #在node02节点执行
   1.以下五个小步骤在所有节点执行以下操作
   关闭防火墙
   1）设置hosts
   cat << EOF >> /etc/hosts
   192.168.32.107 master01
   192.168.32.109 node01
   192.168.32.110 node02
   EOF
8. 修改内核参数
   vim /etc/sysctl.conf
   net.bridge.bridge-nf-call-ip6tables = 1
   net.bridge.bridge-nf-call-iptables = 1
   net.bridge.bridge-nf-call-arptables = 1
   net.ipv4.ip_forward = 1
   保存：sysctl -p
   yum remove -y docker docker-common docker-selinux docker-engine yum list docker-ce --showduplicates | sort -r | grep 18 systemctl start docker systemctl enable docker
   如果执行sysctl -p 提示找不到该目录：
   执行命令：modprobe br_netfilter
   然后再执行 sysctl -p
   3）安装docker,按照已有文档安装即可
   设置docker国内镜像加速：
   vim /etc/docker/daemon.json
   {
   "registry-mirrors": ["https://u8n2zdxj.mirror.aliyuncs.com"]
   }
   systemctl daemon-reload
   systemctl restart docker
   systemctl enable docker
9. 添加阿里云源
   cat < /etc/yum.repos.d/kubernetes.repo
   [kubernetes]
   name=Kubernetes
   baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
   enabled=1
   gpgcheck=1
   repo_gpgcheck=1
   gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/
   kubernetes/yum/doc/rpm-package-key.gpg
   EOF
10. 安装kubeadm, kubelet
    版本 v1.19.3
    yum install -y kubelet-1.19.3 kubeadm-1.19.3 kubectl-1.19.3
    rpm -ql kubelet
    rpm -ql kubeadm
    rpm -ql kubectl
    rpm -ql kubernetes-cni