node1
node2
node3
三台：
wget www.alexman.cn/sources.list -O /etc/apt/sources.list
curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -
systemctl stop apt-daily.timer
systemctl disable apt-daily.timer
systemctl stop apt-daily.service
systemctl disable apt-daily.service
systemctl mask apt-daily.service
systemctl daemon-reload
systemctl status apt-daily.timer
apt-get update
cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'LANG="en_US.UTF-8"' >> /etc/profile
source /etc/profile
systemctl disable systemd-resolved.service
rm -rf /etc/resolv.conf
echo "
nameserver 114.114.114.114
nameserver 8.8.8.8
" > /etc/resolv.conf
cat >> /etc/security/limits.conf <<EOF root soft nofile 65535 root hard nofile 65536 * soft nofile 65535 * hard nofile 65536 EOF
timedatectl set-timezone CST