公网搭建k3s集群

坑1：修改master的k3s.service为公网ip

由于是公网ip，需要对一些配置进行修改，以下对master节点进行修改

vim /etc/systemd/system/k3s.service

[Unit]
Description=Lightweight Kubernetes
Documentation=https://k3s.io
Wants=network-online.target
After=network-online.target

[Install]
WantedBy=multi-user.target

[Service]
Type=notify
EnvironmentFile=-/etc/default/%N
EnvironmentFile=-/etc/sysconfig/%N
EnvironmentFile=-/etc/systemd/system/k3s.service.env
KillMode=process
Delegate=yes
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=1048576
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
TimeoutStartSec=0
Restart=always
RestartSec=5s
ExecStartPre=/bin/sh -xc '! /usr/bin/systemctl is-enabled --quiet nm-cloud-setup.service'
ExecStartPre=-/sbin/modprobe br_netfilter
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/k3s \
    server \
    --advertise-address=公网ip \

#重启k3s
systemctl daemon-reload
systemctl restart k3s

坑2：node节点修改lb

vim /var/lib/rancher/k3s/agent/etc/k3s-agent-load-balancer.json
{
  "ServerURL": "https://公网ip:6443",
  "ServerAddresses": [
    "公网ip:6443"
  ],
  "Listener": null
}
# 重启
systemctl restart k3s-agent
# 看日志
systemctl status k3s-agent