EC2 实例 state 返回挂起，即使它在 lambda function 中运行

Question

I made a lambda function to manage EC2 instances. To create the instance I use this code in the lambda function:

instance = boto3.resource('ec2', region_name='eu-west-3').Instance(instance_id)

To know the instance state, I get the state code as following:

code = instance.state['Code']

When the instance is stopped, the code is 80, then, I can use instance.start() to launch the instance. Inmediately after that the code become 0 (pending) while the instance is launching. The problem is, when I see the instance already running in the EC2 console, the function still returning code 0 instead of code 16 (running). But, if I deploy again the lambda function and run it, now yes, I got code 16, anyone knows the reason of this behaviour?

Answer 1

You should call the instance.load() method to update the status, otherwise it is just retrieving the previous result:

Calls EC2.Client.describe_instances() to update the attributes of the Instance resource. Note that the load and reload methods are the same method and can be used interchangeably.