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

chroot-network-uts-container

Avatar for masayoshi masayoshi
June 17, 2017
Technology
900
6

 chroot-network-uts-container

chroot ✕ netowork namespace ✕UTS namespace

Avatar for masayoshi

masayoshi

June 17, 2017

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
820
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
6.1k
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
32k
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
800
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
4k
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
3.2k

Other Decks in Technology

See All in Technology
CTOキーノート：AI時代の「つなぐ」を再定義 ― 真のIoTとリアルワールドAI【SORACOM Discovery 2026】
Avatar for SORACOM（ソラコム） soracom
PRO
0
130
AI Native なプロダクト組織の立ち上げ方 : 生産性 100 倍への挑戦
Avatar for mikesorae mikesorae
0
1.5k
PHPで作って学ぶリアルタイム音声対話AIとWebSocket入門 by ムナカタ
Avatar for ムナカタ munakata
0
160
AI x 開発生産性を取り巻く予算戦略と投資対効果
Avatar for Masato Ishigaki / 石垣雅人 i35_267
7
3.4k
Claude Mythos、Fable...フロンティアAIの最新動向と企業のセキュリティ対策
Avatar for GMO Flatt Security flatt_security
0
150
そのドキュメント、自動化しませんか？
Avatar for yuk yuksew
1
440
「守りたい体験」を渡すだけで E2E を生成させられるようになった話
Avatar for May hinac0
2
1.1k
プロダクト開発組織の現在地（Ver.2026/07） / product-organization
Avatar for 株式会社カオナビ kaonavi
0
520
どこまでAIに任せるか 〜確率論と決定論の境界決定〜
Avatar for Shu Kobuchi shukob
0
520
2026年のソフトウェア開発を考える（2026/07版） / Agentic Software Engineering 2026-07 Findy Edition
Avatar for Takuto Wada twada
PRO
29
15k
事業成長とAI活用を止めないデータ基盤アーキテクチャの設計思想
Avatar for Noriaki Hiraki hiracky16
0
720
設計レビューとAIハーネスで向き合う AIが生み出した新しいボトルネックの対処法 / Design Reviews and AI Harnesses Against New Bottlenecks Created by AI
Avatar for Nstock nstock
5
500

Featured

See All Featured
How to build an LLM SEO readiness audit: a practical framework
Avatar for Nick Samuel nmsamuel
1
810
Being A Developer After 40
Avatar for Adrian Kosmaczewski akosma
91
590k
10 Git Anti Patterns You Should be Aware of
Avatar for Lemi Orhan Ergin lemiorhan
PRO
659
62k
Unlocking the hidden potential of vector embeddings in international SEO
Avatar for Frank van Dijk frankvandijk
0
880
Why You Should Never Use an ORM
Avatar for John Nunemaker jnunemaker
PRO
61
9.9k
Highjacked: Video Game Concept Design
Avatar for Ryan Kendrick rkendrick25
PRO
1
410
svc-hook: hooking system calls on ARM64 by binary rewriting
Avatar for Akira Moroo retrage
2
390
How to Align SEO within the Product Triangle To Get 
Buy-In & Support - #RIMC
Avatar for Aleyda Solis aleyda
2
1.7k
SEOcharity - Dark patterns in SEO and UX: How to avoid them and build a more ethical web
Avatar for Sara Fernández Carmona sarafernandez
0
220
brightonSEO & MeasureFest 2025 - Christian Goodrich - Winning strategies for Black Friday CRO & PPC
Avatar for Christian Goodrich cargoodrich
3
760
The Power of CSS Pseudo Elements
Avatar for Geoffrey Crofte geoffreycrofte
82
6.5k
Intergalactic Javascript Robots from Outer Space
Avatar for Vicent Martí tanoku
273
27k

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