chaos-lambda 0.2.1

安装

pip install chaos-lambda

示例

# function.pyfromchaos_lambdaimport(inject_delay,inject_exception,inject_statuscode)os.environ['CHAOS_PARAM']='chaoslambda.config'@inject_exceptiondefhandler_with_exception(event,context):return{'statusCode':200,'body':'Hello from Lambda!'}@inject_exception(exception_type=TypeError,exception_msg='foobar')defhandler_with_exception_arg(event,context):return{'statusCode':200,'body':'Hello from Lambda!'}@inject_exception(exception_type=ValueError)defhandler_with_exception_arg_2(event,context):return{'statusCode':200,'body':'Hello from Lambda!'}@inject_statuscodedefhandler_with_statuscode(event,context):return{'statusCode':200,'body':'Hello from Lambda!'}@inject_statuscode(error_code=400)defhandler_with_statuscode_arg(event,context):return{'statusCode':200,'body':'Hello from Lambda!'}@inject_delaydefhandler_with_delay(event,context):return{'statusCode':200,'body':'Hello from Lambda!'}@inject_delay(delay=1000)defhandler_with_delay_arg(event,context):return{'statusCode':200,'body':'Hello from Lambda!'}@inject_delay(delay=0)defhandler_with_delay_zero(event,context):return{'statusCode':200,'body':'Hello from Lambda!'}

当超出时，lambda函数（例如handler_with_exception('foo', 'bar')）将产生以下结果：

exception_msg from config I really failed seriously with a rate of 1
corrupting now
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/.../chaos_lambda.py", line 199, in wrapper
    raise Exception(exception_msg)
Exception: I really failed seriously

配置

失败注入的配置存储在AWS SSM Parameter Store中，并在运行时由^{tt9}访问$ 功能：

{"isEnabled":true,"delay":400,"error_code":404,"exception_msg":"I really failed seriously","rate":1}

要使用AWS CLI将上述配置存储到ssm中，请执行以下操作：

aws ssm put-parameter --region eu-north-1 --name chaoslambda.config --type String --overwrite --value "{ "delay": 400, "isEnabled": true, "error_code": 404, "exception_msg": "I really failed seriously", "rate": 1 }"

aws lambda需要有IAM access to SSM。

{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Action":["ssm:DescribeParameters"],"Resource":"*"},{"Effect":"Allow","Action":["ssm:GetParameters","ssm:GetParameter"],"Resource":"arn:aws:ssm:eu-north-1:12345678910:parameter/chaoslambda.config"}]}

支持的装饰符：

chaos_lambda当前支持以下装饰符：

• @注入延迟-在aws lambda执行中添加延迟
• @注入异常-在aws lambda执行期间引发异常
• @注入状态代码-强制aws lambda返回特定的http错误代码

以及以下课程：

• sessionwithdelay启用对请求库进行子分类并调用具有延迟的依赖项

更多信息：

Full Documentation