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インフラエンジニアのWEBアプリ入門
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Shuhei Ozawa
May 26, 2017
Programming
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インフラエンジニアのWEBアプリ入門
y8c 2017の発表資料です。
Shuhei Ozawa
May 26, 2017
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Transcript
ΠϯϑϥΤϯδχΞͷ WEBΞϓϦೖ 1 Y8 2017 2017/05/27 - Ozawa Shuhei (
@oza_shu )
ࣗݾհ • খपฏ • @oza_shu • Sler→WEBۀք 2 Y8 2017
2017/05/27 - Ozawa Shuhei ( @oza_shu )
͢͜ͱ • ࡞͍ͯ͠ΔΞϓϦ(Ԍ্த) • ΞϓϦ࡞Λ࢝ΊͯΑ͔ͬͨ͜ͱ • ΞϓϦ։ൃ͕ϓϩάϥϛϯάೖʹ͓͢͢Ίͳཧ༝ ͞ͳ͍͜ͱ • ϓϩάϥϛϯάݴޠ
• ϑϨʔϜϫʔΫ 3 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
ฉ͍ͯ΄͍͠ਓ • ͜Ε͔Βϓϩάϥϛϯάษڧ͍ͨ͠ਓ • ษڧͯ͠Δ͚ͲԿΛ࡞ͬͨΒ͍͍͔Θ͔Βͳ͍ਓ • ίʔυॻ͚ΔΑ͏ʹͳΓ͍ͨΠϯϑϥΤϯδχΞ • ϓϩάϥϛϯάॻ͚ΔΑ͏ʹͳΓ͍ͨͱ૬ஊ͞ΕΔਓ 4
Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
ϓϩάϥϛϯά͕Ͱ͖Δͱ Ҿ༻: 20ࡀΛա͔͗ͯΒϓϩάϥϛϯάΛֶ΅͏ͱܾΊͨਓͨͪ 5 Y8 2017 2017/05/27 - Ozawa Shuhei
( @oza_shu )
WEBΞϓϦ͕͓͢͢Ίͷཧ༝ • ೲظ͕ٛͳ͍ • ඞཁͳٕज़͕ଟذʹΔ • αʔό্Ͱಈ͍͍ͯΔΞϓϦͷಈ͖͕Θ͔Δ • োରԠͰΞϓϦͷιʔείʔυΛ͑ΔΑ͏ʹͳΔ •
ॻ͘ͱಈ͘ʂ͢͝ʔ͍ʂͨͷ͠ʔ͍ʂ 6 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
࡞͍ͬͯΔͷ Collect-Qiita ཁ݅ • Qiitaͷ࠷৽هࣄऔಘͱݕࡧ • ϩάΠϯػೳ • ηογϣϯอ࣋ •
͓ؾʹೖΓػೳ(Ԍ্த) 7 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
DEMO ؒʹ߹Θͳ͔ͬͨ! ΞΧϯτ࡞ʙهࣄͷݕࡧ·Ͱ ͏͍ͯ͝! 8 Y8 2017 2017/05/27 - Ozawa
Shuhei ( @oza_shu )
Collect-QiitaͰඞཁͱͳΔٕज़ • Qiitaͷ࠷৽هࣄऔಘͱݕࡧ • GET,POST,ϧʔςΟϯά,ςϯϓϨʔτ,FORMॲཧ • ϩάΠϯػೳ • DB࿈ܞ, ηΩϡϦςΟ
• ηογϣϯอ࣋ • Ωϟογϡ, HTTPϓϩτίϧ • ͓ؾʹೖΓػೳ • DB࿈ܞ, Ajax?? 9 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
ΞϓϦΛ࡞Γ࢝ΊΔͱ ػೳΛՃͨ͘͠ͳΔ • APIΛୟ͍ͯهࣄΛͱͬͯ͜Εͨʂ • هࣄΛ͓ؾʹೖΓొ͍ͨ͠ʂ • ϩάΠϯೝূ͠ͳ͍ͱͩʂ • ηογϣϯཧඞཁͳΜͩɻRedisͰอଘ͍ͨ͠ͳ!
• DockerͰίϯςφʹͯ͠Έ͍ͨʂ • ྲྀߦΓͩ͠k8sͰϚΠΫϩαʔϏεʹ͢Δ?? 10 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
࣍ͷҰา͕Θ͔Δ! Ҿ༻: 20ࡀΛա͔͗ͯΒϓϩάϥϛϯάΛֶ΅͏ͱܾΊͨਓͨͪ 11 Y8 2017 2017/05/27 - Ozawa Shuhei
( @oza_shu )
WEBΞϓϦ͕͓͢͢Ίͷཧ༝ • ೲظ͕ٛͳ͍ • ػೳՃͯ͠Ԍ্͍͍ͯ͠ • ඞཁͳٕज़͕ଟذʹΔ • ৭Μͳٕज़ֶָ͕͍ͯ͠ʂ •
αʔό্Ͱಈ͍͍ͯΔ͕ͳΜͳͷ͔ΕΔ • ͲΜͳٕज़͕ΘΕ͍ͯΔͷ͔Δͷָ͍͠ʂ • ॻ͘ͱಈ͘ʂ͢͝ʔ͍ʂͨͷ͠ʔ͍ʂ ɹ- ! 12 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
ࣗͷ࡞ͬͨΞϓϦͲ͏ͬͯ ಈ͍͍ͯΔΜͩΖ͏? - ΞϓϦΛಈ͔͍ͯ͠Δϓϩηεʹ͍ͭͯͬͱΓ͍ͨ - Ͳ͏ͬͯΞϓϦʹΞΫηε͍ͯ͠Δͷ͔Γ͍ͨ 13 Y8 2017 2017/05/27
- Ozawa Shuhei ( @oza_shu )
ΞϓϦΛಈ͔͍ͯ͠Δϓϩηεʹ͍ͭ ͯͬͱΓ͍ͨ • ΧʔωϧϓϩηεΛׂΓৼΒΕͨPIDΛΈͯͱͯ͠ѻ͏ • ࣮ߦதͷϓϩηε͕ϦιʔεΛ։͘ͱϑΝΠϧσΟεΫϦϓλ ׂ͕ΓͯΒΕΔ 14 Y8 2017
2017/05/27 - Ozawa Shuhei ( @oza_shu )
ίʔυྫ(1) PIDΛΈͯΈΑ͏ # ݱࡏͷϓϩηεΛฦ͢ import os print ("My pid:", os.getpid())
$ python3 3_processes_have_pid.py My pid: 10592 15 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
ίʔυྫ(2) ϑΝΠϧσΟεΫϦϓλ # ϑΝΠϧσΟεΫϦϓλׂ͕ΓͯΒΕ͍ͯΔ͔ΈͯΈΑ͏ if __name__ == "__main__": with open("/etc/passwd")
as passwd: print(passwd.fileno()) passwd.closed try: print(passwd.fileno()) except ValueError: print("The file already has closed") # ϑΝΠϧΛด͡Δͱফ͑Δ $ python3 5_processes_have_file_descriptors_closed_file.2.py 3 The file already has closed 16 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
ϑΝΠϧσΟεΫϦϓλʹ੍ݶ͕͋ Δ ϑΝΠϧ͕։͚ͳͯ͘োରԠΛͨ͜͠ͱ͕͋ͬͨͳ ιϑτϦϛοτΛ্͛ͨ͜ͱΛࢥ͍ग़ͨ͠ PythonͰopenͰϑΝΠϧΛ։͍ͨΒด͡Α͏ͱॻ͍ͯ͋ͬͨʂ withจΛ͏ͷΛ͓͢͢Ί͞Εͨཧ༝͕Θ͔ͬͨʂ 17 Y8 2017 2017/05/27
- Ozawa Shuhei ( @oza_shu )
fork()ؾʹͳͬͯ͘Δ ϓϩηε͕Fork͞ΕΔͬͯͲ͏͍͏͜ͱ͚ͩͬ? ࢠϓϩηεϓϩηεͰΘΕ͍ͯΔશͯͷϝϞϦͷίϐʔΛҾ͖ܧ͙ ϑΝΠϧσΟεΫϦϓλ(ιέοτ) • prefork • ίϐʔɾΦϯɾϥΠτʢCoWɺCopy on Writeʣ
• ԿͰκϯϏϓϩηεͬͯͳΔΜ͚ͩͬ • ϓϩηεؒ௨৴ • ύΠϓॲཧ,ετϦʔϜ,ϝοηʔδ • γάφϧॲཧ • ϓϩηεάϧʔϓ,ηογϣϯάϧʔϓ 18 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
Ͳ͏ͬͯΞϓϦʹ ΞΫηε͍ͯ͠Δͷ͔Γ͍ͨ • HTTPΞϓϦέʔγϣϯϓϩτίϧ • HTTPTCP(UDP)্Ͱ༻͞Εɺ ΫϥΠΞϯτͱαʔόͰΓͱΓ͞ΕΔ 19 Y8 2017
2017/05/27 - Ozawa Shuhei ( @oza_shu )
HTTPϓϩτίϧ • HTTPͲ͏͍͏ϓϩτίϧʁ • ͲΜͳϔομ͕͋Δʁ • KeepAliveΊͪΌͪ͘ΌศརͰ • HTTPͱHTTP2ͷҧ͍? •
requestsϞδϡʔϧ͕ศར 20 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
WEBαʔόͷಈ͖ • αʔόWEBϖʔδʹΞΫηε͠ʹ͘ΔΫϥΠΞϯτͷTCPϙʔ τΛLISTEN͢Δ • ΫϥΠΞϯταʔόʹଓͯ͠ϦΫΤετΛ͛Δ • αʔόWEBϖʔδΛϦΫΤετͯ͠ฦ͢ 21 Y8
2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
TCPαʔόͷ࣮ • echoαʔόͷ࣮؆୯ • socketϞδϡʔϧ͕ศར • ෳͷΫϥΠΞϯτ͔ΒͷଓʹରԠͤͯ͘͞ • ϚϧνϓϩηεϚϧνεϨουɺΠϕϯτۦಈ •
I/O(C10K) • thread,queue,select(),epoll() • GunicornͷίʔϧυϦʔσΟϯά 22 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
ֶशͷґଘ॥ • ಈ͘ͱָ͍͠ • αϯϓϧίʔυιʔείʔυΛಡΜ Ͱಈ͔ͯ͠ΈΔ • RFCಡΜͰ༷ಡΉΑ͏ʹͳΔ • πʔϧʹৼΓճ͞Εͣීวతͳٕज़Λ
͑Δ • Կॻ͍͍͍͔ͯͳΜͯ·ͳ͘ͳΔ 23 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )
ෳͷϨΠϠɺʹߦ͚Δ Ҿ༻: 20ࡀΛա͔͗ͯΒϓϩάϥϛϯάΛֶ΅͏ͱܾΊͨਓͨͪ 24 Y8 2017 2017/05/27 - Ozawa Shuhei
( @oza_shu )
·ͱΊ • ϓϩάϥϛϯάͷ࣍ͷҰา͕Θ͔Δ • োରԠͰιʔείʔυϨϕϧͰಈ࡞Λ͑Δ • ϓϩτίϧϨΠϠͳීวతͳٕज़ֶ͕Δ • ٕज़Λ͏॥ •
ٕज़Λ͏͜ͱͨͷ͍͠ʂ • ٕज़ͷͰϑϨϯζͰ͖Δʂ • ٕज़ͷΛ͠ͳ͕Βɺ͓ञΛҿΉͷͨͷ͍͠ʂ 25 Y8 2017 2017/05/27 - Ozawa Shuhei ( @oza_shu )