Question

我一直在寻找解决这个问题的方法，但是我正在努力解决这个问题，因为我是python的新手，我不知何故相信我的问题大部分在这里，而BOTO3却没有。

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我想做的是从JSON文件中读取配置，并使用该配置创建EC2实例。如果该配置仅包含一种配置以从中创建EC2实例，并且我从加载的JSON获取所需的参数并将其存储在新列表中，则该配置对我有用：

imageId = instance[0]["ImageId"]
ec2params['ImageId'] = imageId

但是..如果我还有更多，这就是问题所在。

我正在尝试使用for循环在配置上循环并将所需的参数存储在列表中，然后将其传递给接受** kwargs的BOTO3 create_instances（）函数。

当我尝试将BOTO3部件移到for循环内时，会发生此问题。

代码示例：导入json 导入boto3

with open('EC2_us_east') as json_file:
        config = json.load(json_file)
        ec2region = "us-east-2"
        reservation = region["Reservations"]
        for reserv in reservation:
            ec2params = {}
            if "Instances" in reserv:
                instance = reserv["Instances"]
            else:
                print("No Instances object present in JSON file")
                break
            if "ImageId" in instance[0]:
                imageId = instance[0]["ImageId"]
                ec2params['ImageId'] = imageId
            else:
                print("No ImageId preset in Instances")
                break
            if "InstanceType" in instance[0]:
                instanceType = instance[0]["InstanceType"]
                ec2params["InstanceType"] = instanceType
                ec2params["MaxCount"] = 1
                ec2params["MinCount"] = 1
            else:
                print("No InstanceType present in Instances")
            if "KeyName" in instance[0]:
                keyName = instance[0]["KeyName"]
                ec2params["KeyName"] = keyName
            else:
                print("No KeyName present in Instances")
            if "Monitoring" in instance[0]:
                monitoring = instance[0]["Monitoring"]["State"]
            if monitoring == 'disabled':
                ec2params["Monitoring"] = {"Enabled": False}
            else:
                ec2params["Monitoring"] = {"Enabled": True}
            else:
                print("No Monitoring present in Instances")
            if "IamInstanceProfile" in instance[0]:
                iamInstanceProfile = instance[0]["IamInstanceProfile"]
                ec2params["IamInstanceProfile"] = iamInstanceProfile
            else:
                print("No IamInstanceProfile present in Instances")
            if "BlockDeviceMappings" in instance[0]:
                blockDeviceMappings = instance[0]["BlockDeviceMappings"]
                ec2params["BlockDeviceMappings"] = blockDeviceMappings
            else:
                print("No BlockDeviceMappings present in Instances")
            if "NetworkInterfaces" in instance[0]:
                networkInterfaces = instance[0]["NetworkInterfaces"]
                ec2params["NetworkInterfaces"] = networkInterfaces
            else:
                print("No NetworkInterfaces present in Instances")
            print(ec2params)

ec2 = boto3.resource('ec2', ec2region)
response = ec2.create_instances(**ec2params)
instance_id = response[0].instance_id
print("Instance: " + ec2params['InstanceType'] + " with ID: " +
  instance_id + " was created")

当create实例部分发生在for循环内时，它对我失败，并且在传递ec2params 时，我从BOTO3收到验证错误

但是当我在外面做那部分工作正常并创建一个EC2实例时。

我想让它在for循环中工作，该循环将迭代保留并从那里获取实例。稍后，我将其分解为功能，以使其更具可读性，并希望使其起作用：/

感谢您的协助！

boto 3使用python

0 个答案: