asg_rolling_upgrade.py 文件源码

def connect(self, autoscaling_client=None, ec2=None, ec2_client=None):
        """ Opens connections to AWS, specifically the autoscaling client and
            EC2 client and resource.

        Args:
            autoscaling_client: Override the autoscaling client.
            ec2: Override the EC2 resource.
            ec2_client: Override the EC2 client.
        """
        print('Connecting to AWS...')
        self._as_client = autoscaling_client or boto3.client('autoscaling')
        self._asg_paginator = self._as_client.get_paginator(
            'describe_auto_scaling_groups')
        self._ec2 = ec2 or boto3.resource('ec2')
        self._ec2_client = ec2_client or boto3.client('ec2')