多台云主机

import boto3

# 创建EC2客户端
ec2_client = boto3.client('ec2', region_name='ap-guangzhou')

# 创建VPC
vpc_response = ec2_client.create_vpc(CidrBlock='10.0.0.0/16')
vpc_id = vpc_response['Vpc']['VpcId']

# 创建子网
subnet_response = ec2_client.create_subnet(VpcId=vpc_id, CidrBlock='10.0.1.0/24')
subnet_id = subnet_response['Subnet']['SubnetId']

# 创建安全组
security_group_response = ec2_client.create_security_group(GroupName='my-sg', Description='My security group', VpcId=vpc_id)
security_group_id = security_group_response['GroupId']

# 添加入站规则
ec2_client.authorize_security_group_ingress(GroupId=security_group_id, IpPermissions=[
    {'IpProtocol': 'tcp', 'FromPort': 80, 'ToPort': 80, 'IpRanges': [{'CidrIp': '0.0.0.0/0'}]}
])

# 创建云主机
instances_response = ec2_client.run_instances(
    ImageId='ami-xxxxxxxx',
    InstanceType='t2.micro',
    MinCount=2,
    MaxCount=2,
    SubnetId=subnet_id,
    SecurityGroupIds=[security_group_id]
)

# 获取实例ID
instance_ids = [instance['InstanceId'] for instance in instances_response['Instances']]

# 创建负载均衡器
elb_client = boto3.client('elbv2', region_name='ap-guangzhou')
load_balancer_response = elb_client.create_load_balancer(
    Name='my-load-balancer',
    Subnets=[subnet_id],
    SecurityGroups=[security_group_id],
    Scheme='internet-facing',
    Type='application'
)

# 注册目标
target_group_response = elb_client.create_target_group(
    Name='my-target-group',
    Protocol='HTTP',
    Port=80,
    VpcId=vpc_id
)
target_group_arn = target_group_response['TargetGroups'][0]['TargetGroupArn']

elb_client.register_targets(
    TargetGroupArn=target_group_arn,
    Targets=[{'Id': instance_id} for instance_id in instance_ids]
)

# 创建监听器
elb_client.create_listener(
    LoadBalancerArn=load_balancer_response['LoadBalancers'][0]['LoadBalancerArn'],
    Protocol='HTTP',
    Port=80,
    DefaultActions=[{'Type': 'forward', 'TargetGroupArn': target_group_arn}]
)