适用于国内环境下，安装kubernetes、docker相关二进制，以及拉取必须的镜像文件。

k8s-prepare.sh

#!/bin/bash

set -e

docker_install() {
    type docker || curl -sSL https://get.daocloud.io/docker | sh
    systemctl enable docker
    systemctl start docker
    # docker mirrors for china
    cat << EOF > /etc/docker/daemon.json
{
  "registry-mirrors": [
     "https://dockerhub.azk8s.cn",
     "https://hub-mirror.c.163.com",
     "https://registry.docker-cn.com"
  ]
}
EOF
    service docker restart
}

k8s_aliyun_repo_add() {
    cat <<EOF > /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
}

k8s_qcloud_repo_add() {
    cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.cloud.tencent.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.cloud.tencent.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.cloud.tencent.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
}

k8s_install() {
    type kubelet kubeadm kubectl || {
        yum clean all
        yum install -y --disableexcludes=kubernetes kubelet kubeadm kubectl
        systemctl enable kubelet
        systemctl start kubelet
    }
}

docker_warpper_install() {
    local script=/usr/local/bin/docker_wrapper.py
    local url=https://github.com/silenceshell/docker_wrapper/raw/master/docker_wrapper.py
    type $script || curl -sL $url -o $script && chmod 755 $script
}

docker_warpper_pull() {
    kubeadm config images list
    for image in $(kubeadm config images list 2>/dev/null); do
        local had=$(docker image ls $image --format '{{.Repository}}:{{.Tag}}')
        test -z "$had" && docker_wrapper.py pull $image
    done
}

prepare() {
    swapoff -a
    sysctl -w net.ipv4.ip_forward=1
    sysctl -w net.bridge.bridge-nf-call-iptables=1
    sysctl -w net.bridge.bridge-nf-call-ip6tables=1
    kubeadm completion bash > /etc/bash_completion.d/kubeadm
    kubectl completion bash > /etc/bash_completion.d/kubectl
}

case $1 in
docker_install) docker_install ;;
k8s_aliyun_repo_add) k8s_aliyun_repo_add ;;
k8s_qcloud_repo_add) k8s_qcloud_repo_add ;;
k8s_install) k8s_install ;;
docker_warpper_install) docker_warpper_install ;;
docker_warpper_pull) docker_warpper_pull ;;
*) # default
    docker_install
    k8s_aliyun_repo_add
    k8s_install
    docker_warpper_install
    docker_warpper_pull
    prepare
    echo "Done!"
    ;;
esac

快捷指令：

curl -sL https://git.io/scue-k8s-prepare.sh | sh