k8s 增加 node 节点

1.系统初始化

# 关闭防火墙
systemctl stop firewalld
systemctl disable firewalld

# 关闭selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config  # 永久
setenforce 0  # 临时

# 关闭swap
swapoff -a  # 临时
sed -ri 's/.*swap.*/#&/' /etc/fstab    # 永久

# 将桥接的IPv4流量传递到iptables的链
创建 /etc/sysctl.d/k8s.conf 文件，拷贝如下内容
net.bridge.bridge-nf-call-ip6tables=1
net.bridge.bridge-nf-call-iptables
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