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python の関数を AWS Lambda で使用する

Last updated at Posted at 2017-10-18

次の python の関数を、aws の Lambda にアップロードします。

evening_function.py
# -*- coding: utf-8 -*-
#
#	evening_function.py
#
#					Nov/03/2017
#
# --------------------------------------------------------------------
import sys
import json
 
# --------------------------------------------------------------------
def evening_handler(event, context):
	sys.stderr.write("*** evening_handler *** start ***\n")
	print("Received event: " + json.dumps(event, indent=2))
	print("name = " + event['name'])
	print("AAA value1 = " + event['key1'])
	print("BBB value2 = " + event['key2'])
	print("CCC value3 = " + event['key3'])
	sys.stderr.write("*** evening_handler *** end ***\n")
#
	return event['name']  # Echo back the first key value
	#raise Exception('Something went wrong')
# --------------------------------------------------------------------
  1. zip で、固めます。
zip -r evening.zip evening_function.py
  1. aws にアップロードします。
     morning_exec_role というロールが作られているとします。 ロールの作り方は、
    aws cli でラムダを使う
function_create.sh
aws lambda create-function \
	--function-name evening_function \
	--runtime python3.9 \
	--role arn:aws:iam::123456789012:role/morning_exec_role \
	--handler evening_function.evening_handler \
	--zip-file fileb://evening.zip \
	--region ap-northeast-1
  1. CLIからイベントを発火
cli_exec.sh
aws lambda invoke --invocation-type Event \
	--function-name evening_function \
	--region ap-northeast-1 \
	--payload  '{"name": "夏目漱石","key1":" こんにちは", "key2":"おはよう", "key3":"さようなら"}' \
	outputfile.txt
  1. CloudWatchLogsにログが出力されているか確認

CloudWatch -> ログ -> ロググループ

Node.js のサンプルはこちら
aws cli で Lambda を使う

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