如何在 Amazon Lightsail 上创建一个 IP 地址更改机器人，以便在没有网络连接时以最短时间更改 IP 地址

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "lightsail:AttachStaticIp",
        "lightsail:GetInstance",
        "lightsail:GetInstanceState",
        "lightsail:AllocateStaticIp",
        "lightsail:ReleaseStaticIp",
        "lightsail:StartInstance",
        "lightsail:StopInstance"
      ],
      "Resource": "*"
    }
  ]
}

aws lightsail allocate-static-ip --static-ip-name my-static-1
aws lightsail allocate-static-ip --static-ip-name my-static-2
aws lightsail allocate-static-ip --static-ip-name my-static-3

#!/usr/bin/env python3
import boto3, socket, time, logging

INSTANCE_NAME = "my-instance"
STATIC_POOL = ["my-static-1", "my-static-2", "my-static-3"]
CHECK_HOST = "1.2.3.4"
CHECK_PORT = 443
TIMEOUT = 3
FAIL_THRESHOLD = 3
COOLDOWN = 30
REGION = "us-east-1"

client = boto3.client('lightsail', region_name=REGION)

logging.basicConfig(level=logging.INFO)
current_index = 0
fail_count = 0

def tcp_check(host, port, timeout):
    try:
        s = socket.create_connection((host, port), timeout=timeout)
        s.close()
        return True
    except Exception:
        return False

def attach_static(ip_name, instance_name):
    logging.info(f"Attaching {ip_name} to {instance_name}")
    resp = client.attach_static_ip(staticIpName=ip_name, instanceName=instance_name)
    return resp

def get_current_ip(instance_name):
    r = client.get_instance(instanceName=instance_name)
    return r['instance'].get('publicIpAddress')

while True:
    ok = tcp_check(CHECK_HOST, CHECK_PORT, TIMEOUT)
    if ok:
        fail_count = 0
    else:
        fail_count += 1
        logging.warning(f"Check failed ({fail_count}/{FAIL_THRESHOLD})")
    if fail_count >= FAIL_THRESHOLD:
        current_index = (current_index + 1) % len(STATIC_POOL)
        next_ip = STATIC_POOL[current_index]
        try:
            attach_static(next_ip, INSTANCE_NAME)
            logging.info("Attach requested, waiting for stabilization...")
            time.sleep(COOLDOWN)
            fail_count = 0
        except Exception as e:
            logging.error("Attach failed: %s", e)
    time.sleep(5)

[Unit]
Description=Lightsail IP Rotator
After=network.target

[Service]
ExecStart=/usr/bin/python3 /opt/ip-rotator/rotator.py
Restart=always
User=root
Environment=AWS_PROFILE=default

[Install]
WantedBy=multi-user.target

systemctl daemon-reload
systemctl enable --now ip-rotator

aws lightsail stop-instance --instance-name my-instance
aws lightsail start-instance --instance-name my-instance
aws lightsail get-instance --instance-name my-instance