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medibaにおけるIAMユーザ管理の歴史 / instudystyle LT mediba...
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Kazuki Numazawa
August 02, 2019
Technology
2
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medibaにおけるIAMユーザ管理の歴史 / instudystyle LT mediba IAM Management History
2019/08/02 インフラ・ネットワークエンジニア勉強会 Vol.1
https://istyle.connpass.com/event/133989/
にて、LT発表した資料。
Kazuki Numazawa
August 02, 2019
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Transcript
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE mediba ʹ͓͚Δ IAM Ϣʔβཧͷྺ࢙ ΠϯϑϥɾωοτϫʔΫΤϯδχΞษڧձ Vol.1
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ࣗݾհ ໊લ: প Ұथ ॴଐ: ɹגࣜձࣾmediba ΠϯϑϥετϥΫνϟʔ෦ ͬͯΔ͜ͱ: ɹओʹ
AWS ΛͬͨγεςϜΠϯϑϥͷઃܭɾߏஙɾӡ༻ AWS ྺ: 7 ɹ2016 AWS ϧτϥΫΠζνϟϯϐΦϯ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ձࣾհ גࣜձࣾmediba ۀ༰: KDDI גࣜձࣾͷ au εϚʔτύεΛத৺ͱͨ͠ au ؔ࿈αʔϏεӡӦ
ͷଞɺࠃ֎ʹͯΧϧνϟʔɾήʔϜɾࢠҭͯɺ෯͍Ͱαʔ ϏεΛల։͠ɺϢʔβʔ͕ΠϯλʔωοτΛ௨ͯ͡ඞཁͳ࣌ʹඞཁͳ ใʹΞΫηεͰ͖Δڥͮ͘ΓͷͨΊͷαʔϏεΛఏڙ͍ͯ͠· ͢ɻ ※auεϚʔτύε KDDI גࣜձࣾͷඪ·ͨొඪͰ͢ɻ https://www.mediba.jp/company/info.html ΑΓൈਮ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ձࣾհ ؆୯ʹݴ͏ͱɺ • au ؔ࿈αʔϏεͬͯ·͢ • au ֎ͷαʔϏεॾʑͬͯ·͢ ͜ΕΒΛ௨ͯ͡
ʮώτʹ“HAPPY”Λʯಧ͚Δͷ͕ զʑͷϛογϣϯͰ͢ɻ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ձࣾհ ѻ͍ͬͯΔ au ؔ࿈αʔϏε(Ұ෦) • au Web ϙʔλϧ (
https://auone.jp/ ) • au Web ϙʔλϧͷχϡʔε໘ ( https://article.auone.jp/ ) • au ఱؾ ( https://tenki.auone.jp/ ) • ϙΠϯτஷΊΔ ( https://enjoy.point.auone.jp/ ) • au εϚʔτύεͷҰ෦ίϯςϯπ • ձһಛయɺΞϓϦऔΓ์ɺೖୀձɺetc…
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ຊ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE [ظ] (2013ʙ2015ࠒ)
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAMϢʔβཧ[ظ] • mediba ʹ͓͚Δ AWS ར༻ 2013ࠒ͔Β • ϒϩάͷձࣾܦ༝Ͱ
AWS ΞΧϯτΛൃߦ ͯ͠ར༻ • ͳͷͰɺ͕͢͞ʹʮroot ϢʔβΛར༻͢Δʯͱ ͍͏ΞϯνύλʔϯதͷΞϯνύλʔϯঢ়ଶ ආ͚ΒΕ͍ͯͨ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ͪͳΈʹલ৬ͰͬͯͨYOʂ(খ)
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAMϢʔβཧ[ظ] • ࠷ॳͷࠒɺ·ͩ • ΞΧϯτݸఔ • ར༻ऀਓఔ • ͦͷ࣌ͷ
IAM Ϣʔβ • ֤ AWS ΞΧϯτͦΕͧΕʹ ݸਓ༻ IAM ϢʔβΛ࡞
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAMϢʔβཧ[ظ]
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE [సػ] (2015)
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[సػ] ࣌2015 ؾ͚ΞΧϯτ͕େྔʹ → ࣗવͱ IAM Ϣʔβେʹ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE Why ?
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[సػ] • AWS Λར༻ͨ͠ϓϩμΫτ͕૿͑Δͨͼʹ3ͭ ͣͭΞΧϯτ͕૿͑Δঢ়ଶ • 2015ࠒʹ40͍ۙΞΧϯτ͕͋ͬͨͱ͔ͳ ͔ͬͨͱ͔
• ΞΧϯτ͝ͱʹ IAM ϢʔβΛ࡞ɾཧ͢Δ ͷਖ਼͖ͭ͘ͳ͖ͬͯͨ • ར༻ऀଆɺϩάΠϯɾϩάΞτΛ܁Γ ฦ͢ͷ͕͠ΜͲ͔ͬͨͱࢥ͏
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[సػ] • ͍ͭͰʹɺ͜ͷࠒ͔ΒηΩϡϦςΟ໘͕ؾʹͳ Γͩ͢ • ͜͜·ͰɺID/ύεϫʔυ ͷΈͰϩάΠϯ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE [సظ] (2015)
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[సظ] • IAM Ϣʔβͷཧ͕ࡶ • IAM ϢʔβͷηΩϡϦςΟ໘͕ؾʹͳΔ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ͜ͷ2ͭΛಉ࣌ʹղܾ͢ΔͨΊ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ʮ౿Έ AWS ΞΧϯτํࣜʯ Λ࠾༻
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[సظ]
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[సظ] • Πϝʔδ౿Έαʔόͱಉ͡ • ֤ϓϩμΫτͷ֤ڥͷೖΓޱͱ͚ͯͩ͠ͷ AWS ΞΧϯτΛ༻ҙ •
ೖΓޱ͕1ͭʹͳΔͷͰɺ͜͜ͷ CloudTrail Λ ༗ޮԽͯ͠ɺϩάΠϯهΛอଘɺࢹ • ౿Έ্ͷ IAM Ϣʔβͷ MFA ઃఆΛඞਢͱ͢ Δ͜ͱͰηΩϡϦςΟΛ্
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE [ख़ظ] (2016ʙݱࡏ)
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ͔͜͜Βɺ࣮ࡍʹͲ͏͍͏ ઃఆʹͳ͍ͬͯΔ͔Λ͝հ͠·͢ɻ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ֤ϓϩμΫτͷ֤ڥͷ AWS ΞΧϯτଆ (࣮ڥ)
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ࣮ڥଆ • ৽ن AWS ΞΧϯτൃߦޙɺ࠷ॳʹ ΫϩεΞΧϯτΞΫηε༻ͷ IAM ϩʔϧΛ༻ҙ •
͜ͷ IAM ϩʔϧʹɺ౿ΈΞΧϯτ͔Βͷ ར༻ڐՄΛઃఆ • ʮMFA ඞਢʯΛ݅ʹઃఆ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ࣮ڥଆ • IAM ϩʔϧେ·͔ʹҎԼͷछྨͷͷΛ༻ҙ • ཧऀ༻ • Administrator •
ਖ਼ࣾһ༻ • IAM ͷҰ෦ݖݶҎ֎શͯڐՄ • (ਖ਼ࣾһҎ֎ͷ)։ൃऀ༻ • ୲͍ͯ͠ΔϓϩμΫτͰར༻͢ΔαʔϏεͷݖݶͷΈڐՄ • ReadOnly ༻ • ROMઐ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ࣮ڥଆ ͪͳΈʹɺ సظʹ͜ͷΛಋೖͨ͠ࡍɺͦͷ࣌ଘࡏ͍ͯͨ͠ AWSΞΧϯτશͯʹલड़ͷϩʔϧΛ࡞ɻ ͦͷޙɺ౿Έ AWS ΞΧϯτʹݸਓ༻ IAM Ϣʔβͷ
࡞ͱεΠον֬ೝ͕औΕͨஈ֊Ͱɺ࣮ڥଆͷݸਓ༻ IAM ϢʔβΛશͯআͨ͠ɻ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ࣮ڥଆ • ͜ΕҎ߱ɺIAM Ϣʔβͷ࡞Λݪଇېࢭ • IAM ϩʔϧͷར༻Λܒɾਪਐ • ͨͩ͠ɺͨ·ʔʹΞΫηεΩʔ/γʔΫϨοτΞΫηε
ΩʔͰ͔͠ରԠͰ͖ͳ͍ύςΟʔϯ͕͋Δ • ͜ͷ߹૬ஊͷ্Ͱɺྫ֎తʹ IAM ϢʔβΛ࡞
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ౿Έ AWS ΞΧϯτଆ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ౿Έଆ • ݸਓ༻ͷ IAM Ϣʔβ͜͜ʹ͔͠࡞Βͳ͍ • IAM Ϣʔβʹ MFA
Λઃఆ • ཧऀܥͷ IAM ϢʔβҎ֎ɺҎԼͷݖݶͷΈ༩ • εΠον͢ΔͨΊͷݖݶ (sts:AssumeRole) • ࣗͷ MFA ઃఆΛ͢Δݖݶ • ࣗͷύεϫʔυΛઃఆ͢Δݖݶ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ౿Έଆ • MFA ͷઃఆΛ͍ͯ͠ͳͯ͘౿ΈͷϩάΠϯ Ͱ͖ͯ͠·͏ • લड़ͷʮMFA ඞਢʯͷ͕݅ΫϩεΞΧϯτ༻ͷ ϩʔϧʹ͍͍ͯΔ
• ͜ͷ݅ͰɺMFA ະઃఆऀͷεΠονΛ੍ • ͜ΕʹΑΓɺMFA ͕ઃఆ͞Εͳ͍··ͷར༻Λ͙
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE ౿Έଆ • ਖ਼ࣾһҎ֎ͷ IAM Ϣʔβ Source IP Ͱͷૢ࡞੍ݶ ༩
• AWS ίϯιʔϧͷΞΫηεΛ੍ݶͰ͖ͳ͍ͷ Ͱɺ౿ΈͷϩάΠϯͲ͔͜ΒͰͰ͖Δ • ͨͩɺਖ਼ࣾһҎ֎ɺΦϑΟε֎Ͱͷར༻Λఆ ͍ͯ͠ͳ͍ • ͦͷҝͷ Source IP ʹΑΔૢ࡞੍ݶ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE MFA ʹ͍ͭͯ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE MFA ʹ͍ͭͯ • ਖ਼ࣾһ • ձ͔ࣾΒۀ༻ͱͯ͠ εϚʔτϑΥϯΛࢧڅ͞Ε͍ͯΔ • ͦͷۀʹ
MFA ༻ͷΞϓϦ (mediba Ͱ Authy ͷར༻Λਪ)Λ Πϯετʔϧͯ͠ར༻
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE MFA ʹ͍ͭͯ • ਖ਼ࣾһҎ֎ • Χʔυܕͷཧ MFA σόΠεΛར༻ •
ਖ਼ࣾһಉ༷ɺձࣾཧͷσόΠεʹඥ͚͔ͨͬ ͨͨΊɺձࣾͰΧʔυΛ༻ҙ • ཧऀଆͰMFA Λઃఆͯ͠ΧʔυΛି༩
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE [ݱࡏ]
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[ݱࡏ] ݱࡏ͜Ε·Ͱઆ໌ͨ͠ঢ়ଶͰӡ༻ AWS ΞΧϯτ80ఔ ·͊ಛʹେ͖ͳࢧোແ͍
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE [ະདྷ]
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[ະདྷ] • MFA ΧʔυܕσόΠεΊ͍ͨ • ୯७ʹɺཧΧʔυͷཧ͕໘ • mediba
ͰχΞγϣΞ։ൃΛ͍ͯ͠Δ • ํڌͷձࣾʹσόΠεΛି༩Ͱ͖ͳ͍ • IP ΞυϨεʹΑΔར༻ڌͷ੍ݶΛ͍ͯ͠Δ͔Β ݸਓͰྑ͍ͷͰʁͷొ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[ະདྷ] • MFA ΧʔυܕσόΠεΊ͍ͨ • ୯७ʹɺཧΧʔυͷཧ͕໘ • mediba
ͰχΞγϣΞ։ൃΛ͍ͯ͠Δ • ํڌͷձࣾʹσόΠεΛି༩Ͱ͖ͳ͍ • IP ΞυϨεʹΑΔར༻ڌͷ੍ݶΛ͍ͯ͠Δ͔Β ݸਓͰྑ͍ͷͰʁͷొ ͜ΕΒͷ͔Βɺ ΊΔํͰௐத
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[ະདྷ] • OS ΞΧϯτ IAM Ϣʔβ͚ͩͰཧ • Systems
Manager ͷ Session Manager Λར༻ • طʹ Session Manager ͚ͩͰ։ൃΛߦͬͯΒͬ ͍ͯΔϓϩμΫτ͋Δ • ࠓޙɺ৽نʹߏங͢ΔϓϩμΫτͰجຊతʹ Session Manager Λ࠾༻͍ͯ͘͠
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[ະདྷ] • Session Manager ͷϝϦοτ • SSH ͷ͚݀͋ෆཁ
• ౿Έαʔόෆཁ • Private Subnet ʹ͋ͬͯར༻Մೳ • ૢ࡞ϩάΛ S3 ͱ CloudWatch Logs ʹग़ྗՄೳ • IAM ϙϦγʔͰ EC2 ΠϯελϯεͷΞΫηε੍ݶՄೳ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[ະདྷ] • Session Manager ͷσϝϦοτ • SSM Agent
ͷಋೖ͕ඞཁ • OS ΞΧϯτ͕ ssm-user ͱ͍͏ͷݻఆ • no pass Ͱ sudo ՄೳͳݖݶΛ͍࣋ͬͯΔ • IAM Ϣʔβຖʹར༻ίϚϯυΛ੍ݶ͍ͨ͠ɺͱ͍͏͜ͱ ͕Ͱ͖ͳ͍ • ↑ͷέʔε EC2 Instance Connect Ͱղܾ͠Α͏ʂ
$PQZSJHIUNFEJCB*OD"MM3JHIUT3FTFSWFE IAM Ϣʔβཧ[ະདྷ] • Session Manager ͷσϝϦοτ • SSM Agent
ͷಋೖ͕ඞཁ • OS ΞΧϯτ͕ ssm-user ͱ͍͏ͷݻఆ • no pass Ͱ sudo ՄೳͳݖݶΛ͍࣋ͬͯΔ • IAM Ϣʔβຖʹར༻ίϚϯυΛ੍ݶ͍ͨ͠ɺͱ͍͏͜ͱ ͕Ͱ͖ͳ͍ • ↑ͷέʔε EC2 Instance Connect Ͱղܾ͠Α͏ʂ ݱ࣌Ͱɺ͜ΕΒͷ σϝϦοτ͕ϋʔυϧʹ ͳΔ͜ͱͳ͍ͨΊɺ ՄೳͳݶΓ࠾༻͍ͯ͘͠