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Software Testing in AWS IoT with The Power of Python
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Koji Nakayama
August 31, 2018
Technology
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1.4k
Software Testing in AWS IoT with The Power of Python
Serverless Meetup Tokyo #10 の登壇資料です。
Koji Nakayama
August 31, 2018
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Transcript
Software Testing in AWS IoT with The Power of Python
Serverless Meetup Tokyo #10 2018/08/31 Koji Nakayama 1
ᛔ૩奧Օ • Ӿઊ ଛလ • μ϶φϮϊϐϖ໌ୗտᐒ • ςЄϝЄϹφ樄咲᮱ • ςЄϝЄςαϖεЀυϘί
• GitHub: knakayama • অͣΘ΄: 䩚ܖίυί 2
ψϐτϴЀٖͺ͚ͼ • 扖ͯͩ; • AWS IoTΨڥአͭ͵ίЄκϓμώϰ • AWS IoT䌏ͯΡαЀϓνϹЄτϴЀϓφϕ •
Pythonͧ͠Ρͳ΄䋚ᤰֺ • 扖͚ͫͩ; • ϜЄϖγδί΄扖 3
揾ාل樄ͭΔͯ 4
ίυδЀύ 1. AWS IoTΨڥአͭ͵ίЄκϓμώϰ 2. ϓφϕොဩΨᘍ͞Ρ 3. PythonΞΡ䋚ᤰֺ 5
ίυδЀύ 1. AWS IoTΨڥአͭ͵ίЄκϓμώϰ 2. ϓφϕොဩΨᘍ͞Ρ 3. PythonΞΡ䋚ᤰֺ 6
AWS IoTͽͽͣΡԆͩ; • IoTϔϝαφ΄ϔЄό㷧ᵞ • 敋΄֖ᗝఘ䁭Ψࣈ㾩ϤϺϐϕͯΡ • Ⴥଶ/氱ݻͣͿ΄ॠ䶲ఘ䁭ΨίϤϷͽᤒᐏͯΡ • IoTϔϝαφ΄ګக
• 䒐ਛڹείπЀ΄櫮რΨͺͧΡ • 㪥敋ڹ敋΄ჅଶΨ䄜͞Ρ 7
AWS IoTͽͽͣΡԆͩ; • IoTϔϝαφ΄ϔЄό㷧ᵞ ! Քࢧ΅ͩͷΟϢζЄθφ • 敋΄֖ᗝఘ䁭Ψࣈ㾩ϤϺϐϕͯΡ • Ⴥଶ/氱ݻͣͿ΄ॠ䶲ఘ䁭ΨίϤϷͽᤒᐏͯΡ
• IoTϔϝαφ΄ګக • 䒐ਛڹείπЀ΄櫮რΨͺͧΡ • 㪥敋ڹ敋΄ჅଶΨ䄜͞Ρ 8
IoTϔϝαφ΄ϔЄόΨ㷧ᵞͯΡ ίЄκϓμώϰ 9
IoTϔϝαφ΄ϔЄό㷧ᵞ 10
IoTϔϝαφ - AWS IoT 11
AWS IoT - Kinesis Data Streams 12
IoT Rule;AWS IoT SQL • IoT Rule΅SQLΨڥአͭͼIoTϔϝαφ͡ΟᭆΟͼͣ͵ϔЄό Ψ̵֢ͭ姆΄AWSςЄϠφͳ΄ϔЄόΨჁͯͩ;͢ͽͣ Ρ SELECT
*, topic(3) as deviceId, timestamp() as timestamp FROM '$aws/things/+/shadow/update' WHERE state.reported.temperature > 20 13
Kinesis Data Streams - Consumers 14
Consumers - Storage 15
IoTϔϝαφ΄ϔЄόΨ݇ᆙͯΡ ίЄκϓμώϰ 16
IoTϔϝαφ΄ϔЄό݇ᆙ 17
ϳЄσ - ϯϝαϸίϤϷ 18
ϯϝαϸίϤϷ - 扯戣 19
ϯϝαϸίϤϷ - API Gateway 20
ίυδЀύ 1. AWS IoTΨڥአͭ͵ίЄκϓμώϰ 2. ϓφϕොဩΨᘍ͞Ρ ! 3. PythonΞΡ䋚ᤰֺ 21
֜Ψϓφϕͭ͵͚΄͡ • ϓφϕͭ͵͚ᅩ΅2ͺ • IoTϔϝαφ΄ϔЄό΅φϕϹЄυכਂͽͣΡҘ • API͡Οͳ΄ϔЄόΨ݇ᆙͽͣΡҘ • ᥝͯΡαЀϓνϹЄτϴЀϓφϕΨͭ͵͚ 22
αЀϓνϹЄτϴЀϓφϕΨͿͩͽΚΡ͡ • ϯϐμᔮϑЄϸ vs AWS΄䋚厏ह • ϯϐμᔮϑЄϸ(LocalStack/moto/etc...)ͽ䌏䖕ݢᚆ䁰ݳ΅चͳ ͽ亹ΔͱͼΡ • ϢΰЄϖϝϐμϸЄϤΨ㱢ض
• ϯϐμᔮϑЄϸͽ΄αЀϓνϹЄτϴЀϓφϕΨग़ͥ䨗͚ͼ̵AWS 䋚厏हͽ΄αЀϓνϹЄτϴЀΨͥͯΡ䜐ኼ • IoT Rule΅ͳΘͳΘ๚䌏䖕Ξ͜΄ͽAWS΄䋚厏हͽ䋚ෞ 23
ίυδЀύ 1. AWS IoTΨڥአͭ͵ίЄκϓμώϰ 2. ϓφϕොဩΨᘍ͞Ρ 3. PythonΞΡ䋚ᤰֺ ! 24
ϓφϕ΄༷ኼ • MQTTμ϶αίЀϕͽϔЄόΨכਂ • ͩΨϓφϕڹ䋚ෞͭͼͥ͠ • HTTPμ϶αίЀϕͽAPI͡Οͳ΄ϔЄόΨ݇ᆙ • ๗இͭ͵ϔЄό͢ݐͽͣΡ͡ϓφϕ 25
MQTTμ϶αίЀϕͽϔЄόΨכਂ 26
PythonΞΡMQTTള姆 27
PythonΞΡMQTTള姆 28
HTTPμ϶αίЀϕͽϔЄόΨ݇ᆙ 29
HTTPμ϶αίЀϕΞΡϔЄό݇ᆙ 30
HTTPμ϶αίЀϕΞΡϔЄό݇ᆙ 31
HTTPμ϶αίЀϕΞΡϔЄό݇ᆙ 32
ڥአͯΡϯυϲЄϸ • MQTTμ϶αίЀϕ: AWS IoT Device SDK for Python •
ϓφϕϢϹЄϭϼЄμ: pytest • ͳ΄՜: • HTTPμ϶αίЀϕ: requests • Cognito;΄SRP: warrant • AWS IoT;΄Ϸϕ϶α㳌ቘ: tenacity 33
ϓφϕϔЄό΄伛㯪 @pytest.mark.parametrize( 'publish_message', [ (({ 'state': { 'reported': { 'foo':
'bar', 'baz': 'qux' } } })) ], indirect=True) def test_fetch_device_data(api_endpoint, token, publish_message): ... 34
ᥴ抍 • pytest΅fixture;͚͜՛奲ΕͽϥϸϞ樛හΨ conftest.py 懿ᬿݢᚆ1 • ϓφϕξЄφ΄හfixtureΨჁͭͼ̵ϓφϕڹͳΨ䋚ᤈͽͣΡ • ͩͩͽMQTTμ϶αЀϕ͡ΟϔЄό΄Publish;SRP扯戣Ψ亹Δͱͼͥ͠ •
@pytest.mark.parametrize ͽϓφϕϔЄόΨϞ϶ϮЄό۸̵ͭ1ͺ΄ϓφϕξЄφͽ姜嬄 ΨṛΗΡͩ;͢ͽͣΡ2 • indirect=True ͭͼͥ͠;fixtureϓφϕϔЄόΨჁͯͩ;͢ͽͣΡ3 3 https://docs.pytest.org/en/latest/example/parametrize.html#apply-indirect-on-particular-arguments 2 https://docs.pytest.org/en/latest/parametrize.html 1 https://docs.pytest.org/en/latest/plugins.html 35
MQTTμ϶αЀϕ͡Ο΄Publish from AWSIoTPythonSDK.MQTTLib import AWSIoTMQTTClient @pytest.fixture(scope='function') @retry(stop=stop_after_attempt(5), wait=wait_exponential(multiplier=1, max=10)) def
publish_message(request): ... mqtt = AWSIoTMQTTClient('my_thing_01') mqtt.configureEndpoint(..., 8883) mqtt.configureCredentials(...) mqtt.connect() for message in request.param: mqtt.publish(topic, json.dumps(message), 1) time.sleep(5) 36
ᥴ抍 • fixture΅ϔπϹЄόͽ愢හਧͽͣΡ • pytest΅scope;͚͜՛奲ΕͽfixtureΨϓφϕξЄφ樌ͽوํͯΡͩ;͢ݢᚆ4 • ηϣυδμϕ΄ኞ౮πφϕ͢͡͡ΡfixtureΨوํͭͼͥ͠;ϞϢζЄϫЀφ͢ṛΔΡ • tenacity΄ retry
ϔπϹЄόͽAWS IoTεЀϖϪαЀϕ;΄Ϸϕ϶α㳌ቘΨ懿ᬿ5 • pytest䰤伛΄ request fixtureͽϞ϶ϮЄό۸ͫ͵ϓφϕϔЄόΨ݇ᆙͭͼ͚Ρ6 6 https://docs.pytest.org/en/latest/reference.html#request 5 https://github.com/jd/tenacity 4 https://docs.pytest.org/en/latest/fixture.html#scope-sharing-a-fixture-instance-across-tests-in-a-class-module-or- session 37
requestsϯυϲЄϸͽAPIίμψφ import requests @pytest.mark.parametrize( 'publish_message', [ ... def test_fetch_device_data(api_endpoint, token,
publish_message): response = requests.get(f'{api_endpoint}/devices/my_thing_01', headers={'Authorization': token}) body = response.json() assert response.status_code == 200 assert body['deviceId'] == 'my_thing_01' 38
warrantΞΡCognito΄SRP from warrant.aws_srp import AWSSRP @pytest.fixture(scope='session') def token(): config_abs_path =
str(pathlib.Path(__file__).parent.joinpath('configs').resolve()) config = json.load(open(f'{config_abs_path}/config.json', 'r')) aws = AWSSRP(username=config['username'], password=config['password'], pool_id=config['pool_id'], client_id=config['client_id'], client=boto3.client('cognito-idp')) tokens = aws.authenticate_user() return tokens['AuthenticationResult']['AccessToken'] 39
ᥴ抍 • ϓφϕξЄφ΄හ token fixtureΨਧ嬝̵HTTPϥϐύϕЄ μЀΨ戔ਧͭͼAPIΨGET • ݐͭ͵奾ຎ͢㾩ͭ͵Θ΄͡ assert ͽϓφϕ
40
Δ;Η • AWS IoTΨֵ͜;IoTϔϝαφ΄ϔЄό㷧ᵞ/ګக͢ͽͣΡ • ςЄϝЄϹφίϤϷξЄτϴЀ΄αЀϓνϹЄτϴЀϓφϕ΅ ϓφϕ䖕ͮͼ䋚ᤈ厏हΨᘍ䚅ͯΏͣ • Python΄ϯυϲЄϸΨֵ͜;क़;墋㶨αЀϓνϹЄτϴЀ ϓφϕ䨗ͧΡ
41