Upgrade to Pro — share decks privately, control downloads, hide ads and more …

chroot-network-uts-container

Sponsored · Ship Features Fearlessly Turn features on and off without deploys. Used by thousands of Ruby developers. →
Avatar for masayoshi masayoshi
June 17, 2017
Technology
6
860

 chroot-network-uts-container

chroot ✕ netowork namespace ✕UTS namespace

Avatar for masayoshi

masayoshi

June 17, 2017
Tweet

More Decks by masayoshi

See All by masayoshi
Perlアプリケーションで トレースを実装するまでの 工夫と苦労話
Avatar for masayoshi masayoshi
1
690
これからSREになる人と、これからもSREをやっていく人へ
Avatar for masayoshi masayoshi
6
5.8k
メトリクス、ログ、トレースをうまく使い分けて可観測性を高めよう！
Avatar for masayoshi masayoshi
8
12k
Developers Summit 2021 summer
Avatar for masayoshi masayoshi
15
31k
2021-06-cloud-native-reg-event
Avatar for masayoshi masayoshi
8
2.6k
SRE_Culture_Organization
Avatar for masayoshi masayoshi
16
11k
cloudnative-kansai-2019
Avatar for masayoshi masayoshi
1
750
ミドルウェア実行環境の多様化を考慮したインフラアーキテクチャの一検討/study on web system architecture #2
Avatar for masayoshi masayoshi
0
3.9k
Webサービスにおけるインフラアーキテクチャの体系化と選択自動化の研究/study on web system architecture #1
Avatar for masayoshi masayoshi
0
3k

Other Decks in Technology

See All in Technology
AWS Network Firewall Proxyを触ってみた
Avatar for nagisa_53 nagisa53
1
210
All About Sansan – for New Global Engineers
Avatar for Sansan, Inc. sansan33
PRO
1
1.3k
茨城の思い出を振り返る ～CDKのセキュリティを添えて～ / 20260201 Mitsutoshi Matsuo
Avatar for SHIFT EVOLVE shift_evolve
PRO
1
230
こんなところでも（地味に）活躍するImage Modeさんを知ってるかい？- Image Mode for OpenShift -
Avatar for Masataka Tsukamoto tsukaman
0
120
AI駆動開発を事業のコアに置く
Avatar for 鬼澤輔 tasukuonizawa
1
130
データの整合性を保ちたいだけなんだ
Avatar for ShoheiMitani shoheimitani
8
3.1k
小さく始めるBCP ― 多プロダクト環境で始める最初の一歩
Avatar for kekke-n kekke_n
1
380
コスト削減から「セキュリティと利便性」を担うプラットフォームへ
Avatar for SansanTech sansantech
PRO
3
1.4k
今日から始める Amazon Bedrock AgentCore
Avatar for Har1101 har1101
4
400
名刺メーカーDevグループ 紹介資料
Avatar for Sansan, Inc. sansan33
PRO
0
1k
usermode linux without MMU - fosdem2026 kernel devroom
Avatar for Hajime Tazaki thehajime
0
230
インフラエンジニア必見!Kubernetesを用いたクラウドネイティブ設計ポイント大全
Avatar for 高棹大樹 daitak
1
340

Featured

See All Featured
Discover your Explorer Soul
Avatar for Emna emna__ayadi
2
1.1k
Into the Great Unknown - MozCon
Avatar for Noah Learner thekraken
40
2.3k
Making Projects Easy
Avatar for Brett Harned brettharned
120
6.6k
The Art of Programming - Codeland 2020
Avatar for Erika Heidi erikaheidi
57
14k
Measuring Dark Social's Impact On Conversion and Attribution
Avatar for Stephen Akadiri stephenakadiri
1
120
Navigating Algorithm Shifts & AI Overviews - #SMXNext
Avatar for Aleyda Solis aleyda
0
1.1k
Optimizing for Happiness
Avatar for Tom Preston-Werner mojombo
379
71k
Darren the Foodie - Storyboard
Avatar for Kevinho.art khoart
PRO
2
2.4k
The MySQL Ecosystem @ GitHub 2015
Avatar for Sam Lambert samlambert
251
13k
The Invisible Side of Design
Avatar for Vitaly Friedman smashingmag
302
51k
Bridging the Design Gap: How Collaborative Modelling removes blockers to flow between stakeholders and teams @FastFlow conf
Avatar for Kenny Baas-Schwegler baasie
0
450
The Limits of Empathy - UXLibs8
Avatar for Cassini Nazir cassininazir
1
210

Transcript

  1. chrootͱnetwork namespace Ͱͭ͘Δ؆қίϯςφ ୈճίϯςφܕԾ૝Խͷ৘ใަ׵ձˏେࡕ

  2. ࣗݾ঺հ • id:masayoshi • ͸ͯͳˏژ౎ • WebΦϖϨʔγϣϯΤϯδχΞ • େֶ࣌୅͸SDNؔ࿈ͷݚڀ

  3. ࠓ೔࿩͢͜ͱ • ࣗ࡞ίϯςφͷϞνϕʔγϣϯ • chroot ✕ network namespace ✕ UTS

    namespace

  4. ࠓ೔࿩͢͜ͱ • TenForwardࢯͷৄࡉͳղઆͰجૅٕज़Λཧղ͠ɺ • ࢲͷࡶͳൃදͰίϯςφࣗ࡞ʹڵຯΛ࣋ͬͯ΋Β͍ɺ • udzuraࢯͷhaconiwaͰͥͻνϟϨϯδͯ͠ཉ͍͠

  5. ίϯςφࣗ࡞ͷϞνϕʔγϣϯ • Linuxίϯςφͷษڧ • جૅ෦෼ɺ࣮૷ʹΑΒͳ͍ڞ௨ٕज़ͷษڧ • طଘίϯςφٕज़ͷ࠶֬ೝ • ࡞ͬͯ࢖ͬͯΈΔͱҧ͍ͳͲ͕Α͘෼͔Δ •

    खݩͰͷωοτϫʔΫςετ؀ڥ • ࡉ͔͘มߋ͢ΔͷͰࣗ෼Ͱ৮Γ΍͍͢ํ͕ྑ͍

  6. chroot network namespace UTS namespace

  7. ͳΜͰ͜ͷ3ͭ? • ߹Θͤͯ࢖͏ͱγϯϓϧ͕ͩҙ֎ͱ͓΋͠Ζ͍෺͕ಈ͔ͤΔ • ֶੜͷͱ͖ݚڀͰnetwork nsΛΑ͘࢖͍ͬͯͨ • ωοτϫʔΫͰ༡Ϳͱ͖͸͜ͷߏ੒Λ࢖͍ͬͯΔ • chroot

    namespaceͷҰ෦ͷΈͷ૊Έ߹Θͤ͸ଟ͘ͳͦ͞͏ • 1ͭ1ͭ΍શͯΛ૊Έ߹Θ࣮ͤͨ૷ྫ͸৭ʑ͋Δ

  8. ͜ͷ3ͭͰ΋໘ന͍͜ͱ͕ग़དྷΔ • chroot • docker exportͳͲͷల։͞ΕͨΠϝʔδͷ࣮ߦ • network namespace •

    ಛఆͷIPΞυϨε + ϙʔτͰͷLISTEN • UTS namespace • ؅ཧ্ͷརศੑ

  9. ྫ͑͹ • apache + mackerel-agent + ssh ͳίϯςφ • Webαʔό

    • ؂ࢹ༻ΤʔδΣϯτͱssh͕ಈ࡞ • ΞϓϦέʔγϣϯ + ؂ࢹ + ؅ཧ • ಉҰͷ෺ཧαʔόͰ্هͷίϯςφΛෳ਺ىಈՄೳ • network͸Linux BridgeͰϒϦοδ઀ଓ

  10. #SJEHF ϗετ໊UFTU ϗετ໊UFTU FUI IUUQE    TTI 

    IUUQE  TTI   WBSDPOUBJOFSUFTU WBSDPOUBJOFSUFTU NBDLFSFMBHFOU NBDLFSFMBHFOU

  11. UPVDIWBSSVOVUTOTUFTU VOTIBSFVUTSVOVUTOTUFTUIPTUOBNFUFTU JQOFUOTBEEUFTU JQMJOLBEEOBNFUFTUCSUZQFWFUIQFFSOBNFUFTUDU CSDUMBEEJGCSUFTUCS JQMJOLTFUUFTUDUOFUOTUFTU JQOFUOTFYFDUFTUJQBEESBEEEFWUFTUDU JQOFUOTFYFDUFTUJQMJOLTFUMPVQ JQOFUOTFYFDUFTUJQMJOLTFUUFTUDUVQ JQMJOLTFUUFTUCSVQ

    JQOFUOTFYFDUFTUJQSPVUFBEEEFGBVMUWJB NPVOUUQSPDQSPDNOUUFTUQSPD NPVOUSCJOETZTNOUUFTUTZT NPVOUNBLFSTMBWFNOUUFTUTZT NPVOUSCJOEEFWNOUUFTUEFW NPVOUNBLFSTMBWFNOUUFTUEFW

  12. UPVDIWBSSVOVUTOTUFTU VOTIBSFVUTSVOVUTOTUFTUIPTUOBNFUFTU JQOFUOTBEEUFTU JQMJOLBEEOBNFUFTUCSUZQFWFUIQFFSOBNFUFTUDU CSDUMBEEJGCSUFTUCS JQMJOLTFUUFTUDUOFUOTUFTU JQOFUOTFYFDUFTUJQBEESBEEEFWUFTUDU JQOFUOTFYFDUFTUJQMJOLTFUMPVQ JQOFUOTFYFDUFTUJQMJOLTFUUFTUDUVQ JQMJOLTFUUFTUCSVQ

    JQOFUOTFYFDUFTUJQSPVUFBEEEFGBVMUWJB NPVOUUQSPDQSPDNOUUFTUQSPD NPVOUSCJOETZTNOUUFTUTZT NPVOUNBLFSTMBWFNOUUFTUTZT NPVOUSCJOEEFWNOUUFTUEFW NPVOUNBLFSTMBWFNOUUFTUEFW 654 OFUXPSL DISPPU

  13. UPVDIWBSSVOVUTOTUFTU VOTIBSFVUTSVOVUTOTUFTUIPTUOBNFUFTU JQOFUOTBEEUFTU JQMJOLBEEOBNFUFTUCSUZQFWFUIQFFSOBNFUFTUDU CSDUMBEEJGCSUFTUCS JQMJOLTFUUFTUDUOFUOTUFTU JQOFUOTFYFDUFTUJQBEESBEEEFWUFTUDU JQOFUOTFYFDUFTUJQMJOLTFUMPVQ JQOFUOTFYFDUFTUJQMJOLTFUUFTUDUVQ JQMJOLTFUUFTUCSVQ

    JQOFUOTFYFDUFTUJQSPVUFEEEFGBVMUWJB NPVOUUQSPDQSPDNOUUFTUQSPD NPVOUSCJOETZTNOUUFTUTZT NPVOUNBLFSTMBWFNOUUFTUTZT NPVOUSCJOEEFWNOUUFTUEFW NPVOUNBLFSTMBWFNOUUFTUEFW ίϯςφ࡞੒ʹίϚϯυ JNBHFͷ࡞੒͸আ͘

  14. σϞ͠ͳ͕Βݟ͍ͯ͘

  15. imageͷ࡞੒ • dockerͳΒdocker export Ͱ • build, ship͸dockerͰ΍Δͱָͦ͏ • ࠓճ͸run෦෼Ͱ༡Ϳ

    • dockerͳ͠ͳΒdebootstrapͳͲ • ࠓճ͸debootstrapͰ࡞੒ͨ͠΍ͭΛར༻

  16. namespaceͷӬଓԽ MSXYSXYSXYSPPUSPPU݄JQDJQD<> MSXYSXYSXYSPPUSPPU݄NOUNOU<> MSXYSXYSXYSPPUSPPU݄OFUOFU<> MSXYSXYSXYSPPUSPPU݄QJEQJE<> MSXYSXYSXYSPPUSPPU݄VUTVUT<> • /proc/[PID]/ns ഑Լʹ͋ΔಛघϑΝΠϧ QSPD<1*%>͸ϓϩηε͕ফ͑Δͱͳ͘ͳΔͷͰӬଓԽ͕ඞཁ

  17. namespaceͷӬଓԽ • bindϚ΢ϯτΛ͔ͭͬͯӬଓԽ͢Δ NPVOUCJOESVOVUTOTSVOVUTOT NPVOUNBLFTIBSFESVOVUTOT VOTIBSFVNPVOUCJOEQSPDTFMGOTVUTSVOVUTOT UFTU VOTIBSFVUTSVOVUTOTUFTU • ࠷ۙͷunshareίϚϯυ͸ӬଓԽָ͕

  18. UTS namespace • ओʹ؅ཧͷͨΊ • ίϯςφʹೖͬͨͱ͖ͱ͔ • γϯϓϧʹ࢖͑ΔͷͰ͓ؾܰ UPVDIWBSSVOVUTOTUFTU VOTIBSFVUTSVOVUTOTUFTUIPTUOBNFUFTU

  19. Networkͷ࡞੒ • veth࡞ͬͯbridgeʹ઀ଓ • TenForwardࢯʹΑΔσϞ͕͋Γͦ͏ͳͷͰলུ • (ࢲ͸)৭ʑมߋ͢Δ͜ͱ͕ଟ͍ • Linux BridgeΛOpen

    vSwitchʹͨ͠Γ • ࣗ࡞ͷιϑτ΢ΣΞϧʔλʹ઀ଓͨ͠Γ • KVMͷVMͱ઀ଓͨ͠Γ • ෳ਺NIC + mptcp؀ڥ

  20. Networkͷ࡞੒ • Network͸ϙʔλϏϦςΟʹӨڹ͕ग़΍͍͢ • Ұ࣌ظdocker͕ؤுͬͯͨ • VXLANʹΑΔoverlay NetworkͳͲ • վળ͢΂͖Օॴ͕ͨ͘͞Μ͋Δ໘ന͍෼໺

    • ΦϑϩʔσΟϯά, SR-IOVͳͲߴ଎Խ • VXLANͳͲͷϓϩτίϧٕज़

  21. chroot؀ڥͷ࡞੒ • proc, sys, devͳͲΛmount͢Δ NPVOUUQSPDQSPDNOUUFTUQSPD NPVOUSCJOETZTNOUUFTUTZT NPVOUNBLFSTMBWFNOUUFTUTZT NPVOUSCJOEEFWNOUUFTUEFW NPVOUNBLFSTMBWFNOUUFTUEFW

    TZTUFNE؀ڥͰ͸CJOEϚ΢ϯτ͕4)"3&%ʹͳͬͨͷͰ STMBWF͓͔ͯ͠ͳ͍ͱVNPVOU3ͨ࣌͠ʹ͓͔͘͠ͳΔ

  22. ίϯςφ಺Ͱͷϓϩηεͷ࣮ߦ OTFOUFSOFUSVOOFUOTUFTUa VUTSVOVUTOTUFTUa DISPPUNOUUFTUa FUDJOJUEOHJOYTUBSU • nsenterΛ͔ͭͬͯnamespaceΛattach • ͦͷ্Ͱchroot͢Δ ಉ༷ʹTTIͳͲ΋ىಈ͢Δ

  23. ίϯςφ಺Ͱͷϓϩηεͷ࣮ߦ • chroot഑ԼͰ͸systemd͸ಈ࡞͠ͳ͍ͷͰ஫ҙ͕ඞཁ • chrootͷ୅ΘΓʹsystemd-nspawnΛ࢖ͬͯಈ͔͢ํ ๏΋͋Δ • ͦͷ৔߹ޙड़ͷPID namespaceΛ࢖͏͜ͱʹͳΔ

  24. PID namespace • PID෼཭͢Δͱੜ੒͞Εͨࢠϓϩηε͸ͦͷۭؒͰ͸init(PID=1) ͱͳΔ • init͕ࢮ͵ͱ൵͍͜͠ͱʹͳΔͷͰҡ࣋͢Δඞཁ͕͋Δ • ΑΓྑ͍initΛٻΊΔཱྀ͕࢝·Δ •

    docker 1.13Ͱ runʹ initΦϓγϣϯ͕෇͍ͯͦ͏ • ·ͨ/sbin/init Λ࣮ߦ͢Δɺ͠ͳ͍ͱ͍ͬͨબ୒ࢶ΋૿͑Δ • ࠓճͷ༻్Ͱ͸͍Βͳ͍ͷͰল͍ͨ • ࣮ࡍʹ͸ඞཁͱͳΔ͜ͱ͕ଟ͍ • ্هཧ༝Ͱؾܰʹ΍ΔͳΒল͘ͱָ

  25. PID namespaceΛར༻͠ͳ͍ͱ… • ps ݁Ռ͕෼཭͞Εͳ͍ • ίϯςφ಺ɺίϯςφ֎͔Βݟ์୊ • initʹͿΒԼ͕Δdaemon •

    UST, networkͷnamespace͸෼཭͞Ε͍ͯΔ • ϓϩηεੜ੒࣌ʹ෼཭͠ͳ͚Ε͹ܧঝ͞ΕΔ • ϓϩηεͷऴྃΛͲ͏͢Δ͔ • ss -N test01 -tlpͳͲͰLISTENΛ֬ೝ͢Δͱ෼཭͞Ε͍ͯ Δ͜ͱ͕Θ͔Δ

  26. ps ݁Ռ SPPUOHJOYNBTUFSQSPDFTTVTSTCJOOHJOY IUUQa@OHJOYXPSLFSQSPDFTT IUUQa@OHJOYXPSLFSQSPDFTT IUUQa@OHJOYXPSLFSQSPDFTT IUUQa@OHJOYXPSLFSQSPDFTT SPPUOHJOYNBTUFSQSPDFTTVTSTCJOOHJOY IUUQa@OHJOYXPSLFSQSPDFTT IUUQa@OHJOYXPSLFSQSPDFTT

    IUUQa@OHJOYXPSLFSQSPDFTT IUUQa@OHJOYXPSLFSQSPDFTT

  27. ss݁Ռ TVEPTT/UFTUMUQ 4UBUF3FDW24FOE2ɹ-PDBM"EESFTT1PSUɹ1FFS"EESFTT1PSU -*45&/ɹ IUUQɹ  ɹVTFST OHJOY QJE GE

     -*45&/ɹIUUQɹ ɹVTFST OHJOY QJE GE  TVEPTT/UFTUMUQ 4UBUF3FDW24FOE2ɹ-PDBM"EESFTT1PSUɹ1FFS"EESFTT1PSU -*45&/ɹ IUUQɹ  ɹVTFST OHJOY QJE GE  -*45&/ɹIUUQɹ ɹVTFST OHJOY QJE GE

  28. curl DVSM UFTUDPOUBJOFSOHJOY DVSM UFTUDPOUBJOFSOHJOY

  29. SSH TTI DBUFUDEFCJBO@WFSTJPO  TTI DBUFUDEFCJBO@WFSTJPO TUSFUDITJE

  30. ·ͱΊΔͱ… • image಺ͷϥΠϒϥϦόʔδϣϯͰಈ࡞ • ίϯςφ಺Ͱෳ਺ͷΞϓϦέʔγϣϯΛىಈ • ҟͳΔIPΞυϨεͰ௨৴ • ؆୯ͳΞϓϦέʔγϣϯΛ࣮ߦ͢Δ͙Β͍͸Ͱ͖ͦ͏ •

    ൺֱతރΕ͍ͯΔ΋ͷ͔͠࢖͍ͬͯͳ͍ + γϯϓϧͳ ͷͰ҆ఆ͸͍ͯͦ͠͏

  31. ͍͚ͯͳ͍Օॴ • ͍͚ͯͳ͍Օॴͷطଘίϯςφٕज़Ͱͷղܾ๏ͱ
 ࣗ෼Ͱ࣮૷͢ΔࡍͷղܾํΛൺֱ͢Δͱָ͍͠ • image؅ཧ • Netoworkߏ੒ • PIDͷ؅ཧ,

    ϓϩηεͷॲཧํ๏ • Ϧιʔε੍ݶ • ηΩϡϦςΟ

  32. • imageͷ؅ཧػೳ • snapshot΍ɺόʔδϣχϯά͸? • imageͷҠಈ͸Ͳ͏͢Δ? • Networkߏ੒ • αϒωοτ΋ݻఆͰIP΋खಈͳͷͰҠಈ͸Ͳ͏͢Δʁɹ

    • ҟͳΔαϒωοτͱͷ௨৴͸? • PID෼཭ɺϓϩηεॲཧ • PID͸෼཭͢Δ or ͠ͳ͍? • ίϯςφ಺ͷinitͷॲཧ • γεςϜίϯςφ? ΞϓϦέʔγϣϯίϯςφ?

  33. ·ͱΊ • ίϯςφࣗ࡞͸ؾܰʹͰ͖Δ • Կ͕ίϯςφ͔ͱ͍͏࿩͸͋Δ͕ namespace͸ؾܰʹ࢖͑Δ • طଘίϯςφٕज़΁ͷཧղ͕ਂ·Δ • ͨΓͳ͍ͱ͜Ζ΋ݟ͑ͯ͘Δ

    • Ұճ͸৮͓ͬͯ͘ͱྑͦ͞͏