1.关闭防火墙

systemctl stop firewalld  && systemctl disable firewalld

2.禁用selinux

setenforce 0

3.确认selinux是否修改为disabled

vi /etc/selinux/config

4.创建/etc/sysctl.d/k8s.conf

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1

5.使命令4生效

modprobe br_netfilter
sysctl -p /etc/sysctl.d/k8s.conf

6.安装docker的yum源

yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

7.安装docker,设置开机自启

yum makecache fast

yum install -y --setopt=obsoletes=0 \
  docker-ce-18.06.1.ce-3.el7

systemctl start docker
systemctl enable docker

8.安装的kubelet、kubectl、kubeadm源

阿里云：

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]

name=Kubernetes

baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/

gpgcheck=0

gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

enabled=1
EOF

谷歌官方

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
        https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF

9.安装kubelet、kubectl、kubeadm

yum makecache fast
yum install -y kubelet kubeadm kubectl //安装最新版本
yum install -y kubelet-1.12.3 kubeadm-1.12.3 kubectl-1.12.3 //安装指定版本

10.关闭swap

swapoff -a

11.修改文件/etc/sysctl.d/k8s.conf添加vm.swappiness=0

12.kubelet开机启动

systemctl enable kubelet
systemctl start kubelet

13.拉取镜像

此时仅仅源为阿里云时需要拉镜像

docker pull mirrorgooglecontainers/kube-apiserver-amd64:v1.12.3
docker pull mirrorgooglecontainers/kube-controller-manager-amd64:v1.12.3
docker pull mirrorgooglecontainers/kube-scheduler-amd64:v1.12.3
docker pull mirrorgooglecontainers/kube-proxy-amd64:v1.12.3
docker pull  mirrorgooglecontainers/pause-amd64:3.1
docker pull mirrorgooglecontainers/etcd-amd64:3.2.24
docker pull kuberneter/coredns:1.2.2


docker tag mirrorgooglecontainers/kube-apiserver-amd64:v1.12.3  k8s.gcr.io/kube-apiserver:v1.12.3
docker tag mirrorgooglecontainers/kube-controller-manager-amd64:v1.12.3 k8s.gcr.io/kube-controller-manager:v1.12.3
docker tag mirrorgooglecontainers/kube-scheduler-amd64:v1.12.3 k8s.gcr.io/kube-scheduler:v1.12.3
docker tag mirrorgooglecontainers/kube-proxy-amd64:v1.12.3 k8s.gcr.io/kube-proxy:v1.12.3
docker tag mirrorgooglecontainers/pause-amd64:3.1 k8s.gcr.io/pause:3.1
docker tag mirrorgooglecontainers/etcd-amd64:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag kuberneter/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2

14.初始化集群

kubeadm init --kubernetes-version=1.12.3 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=140.143.0.194

15.部署集群失败

kubeadm reset
ifconfig cni0 down
ip link delete cni0
ifconfig flannel.1 down
ip link delete flannel.1
rm -rf /var/lib/cni/

16.初始化显示成功

a.当前为root用户

echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
source ~/.bash_profile

b.当前为普通用户

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

17.安装podnetwork以及完成容器网页终端会在下篇文档说明