systemctl stop firewalld
systemctl disable firewalld

curl  -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
curl  -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
sed -i '/aliyuncs/d' /etc/yum.repos.d/*.repo

yum clean all && yum makecache fast

cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward=1
vm.max_map_count=262144
EOF

modprobe br_netfilter
# 加载读取内核参数配置文件
sysctl -p /etc/sysctl.d/k8s.conf

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

curl -o /etc/yum.repos.d/docker-ce.repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

yum makecache fast


yum -y install docker-ce-20.10.24 docker-ce-cli-20.10.24

#配置docker加速器、以及crgoup驱动，改为k8s官方推荐的systemd，否则初始化时会有报错。

mkdir -p /etc/docker

cat > /etc/docker/daemon.json <<'EOF'
{
   "data-root": "/home/docker-data"
}
EOF

#启动
systemctl start docker && systemctl enable docker

docker version