添加 k3s 集群节点：

1. master 需要通过 k3s-add-node 脚本进行添加，下方是脚本内容

#!/bin/bash

set -ex

# master_addr=10.0.50.52 # static ip
# master_addr=$(hostname -I | awk '{print $1}') # internal ip
# master_addr=$(curl -Ls http://ifconfig.me/ip) # public ip
master_addr=$(hostname -I | awk '{print $1}') # vpn ip
token=$(sudo cat /var/lib/rancher/k3s/server/node-token)
version='v1.28.2+k3s1'
get_k3s_script_file='/usr/local/lighthouse/softwares/k3s/get_k3s.sh'
# get_k3s_script_file='./get_k3s.sh'

add_nodes_function() {
  for node in $@; do
    ssh root@"${node}" "cat | INSTALL_K3S_VERSION=${version} K3S_URL=https://${master_addr}:6443 K3S_TOKEN=${token} INSTALL_K3S_MIRROR=cn sh -s -- --node-external-ip ${node} --node-ip ${node}" < $get_k3s_script_file
  done
}

case "$1" in
--help | -h | "")
  echo "
This command is used to initialize the K3s worker node and add it to the cluster.
Please ensure firewall rule(TCP:6443) of master node has been allowed!

USAGE:
  k3s-add-node [node_ip...]

Examples:
  k3s-add-node 10.0.0.1 10.0.0.2
"
  exit 0
  ;;
*)
  echo "Please ensure firewall rule(TCP:6443) of master node has been allowed!"
  add_nodes_function $@
  ;;
esac

2. 在 master 节点执行命令

• k3s-node-add 新节点的内网ip

3. 给新加的 k3s node 配置 master 节点的内网通讯信息，方便使用 kubectl top node 查看资源信息

• vim /etc/systemd/system/k3s-agent.service

文件最后必须要有个换行

ExecStart=/usr/local/bin/k3s \
    agent \
        '--node-external-ip' \
        'node内网ip' \
        '--node-ip' \
        'node内网ip' \

修改完成后依次执行命令

• systemctl daemon-reload
• systemctl restart k3s-agent.service