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

chroot-network-uts-container

Avatar for masayoshi masayoshi
June 17, 2017
Technology
6
870

 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
710
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
5.9k
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
770
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
3.1k

Other Decks in Technology

See All in Technology
ランサムウエア対策してますか？やられた時の対策は本当にできてますか？AWSでのリスク分析と対応フローの泥臭いお話。
Avatar for ひろのぶ hootaki
0
110
IBM Bobを使って、PostgreSQLのToDoアプリをDb2へ変換してみよう/202603_Dojo_Bob
Avatar for Mayumi Hirano mayumihirano
1
320
OCHaCafe S11 #2 コンテナ時代の次の一手：Wasm 最前線
Avatar for oracle4engineer oracle4engineer
PRO
1
120
[2026-03-07]あの日諦めたスクラムの答えを僕達はまだ探している。〜守ることと、諦めることと、それでも前に進むチームの話〜
Avatar for tosite tosite
0
200
JAWS DAYS 2026 楽しく学ぼう！ストレージ 入門
Avatar for Yoshiki Fujiwara yoshiki0705
2
160
製造業ドメインにおける LLMプロダクト構築： 複雑な文脈へのアプローチ
Avatar for recruiting@caddi.jp caddi_eng
1
560
スクリプトの先へ！AIエージェントと組み合わせる モバイルE2Eテスト
Avatar for Ryo WATANABE error96num
0
160
実践 Datadog MCP Server
Avatar for 株式会社ヌーラボ nulabinc
PRO
1
100
Exadata Database Service on Dedicated Infrastructure(ExaDB-D) UI スクリーン・キャプチャ集
Avatar for oracle4engineer oracle4engineer
PRO
8
7.2k
AWSの資格って役に立つの？
Avatar for Hiroki Takatsuka tk3fftk
1
210
ナレッジワークのご紹介（第88回情報処理学会 ）
Avatar for KNOWLEDGE WORK / 株式会社ナレッジワーク kworkdev
PRO
0
190
親子 or ペアで Mashup for the Future！ しゃべって楽しむ 初手AI駆動でものづくり体験
Avatar for hiroramos hiroramos4
PRO
0
110

Featured

See All Featured
Between Models and Reality
Avatar for mayunak mayunak
2
230
Testing 201, or: Great Expectations
Avatar for Joseph Mastey jmmastey
46
8.1k
Bash Introduction
Avatar for André Augusto Costa Santos 62gerente
615
210k
How Software Deployment tools have changed in the past 20 years
Avatar for Geshan Manandhar geshan
0
32k
Money Talks: Using Revenue to Get Sh*t Done
Avatar for Nikki Halliwell nikkihalliwell
0
180
Why You Should Never Use an ORM
Avatar for John Nunemaker jnunemaker
PRO
61
9.8k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
Avatar for Joe Casabona jcasabona
34
2.7k
Side Projects
Avatar for Sacha Greif sachag
455
43k
The innovator’s Mindset - 
Leading Through an Era of Exponential Change - McGill University 2025
Avatar for Jean-Marc De Jonghe jdejongh
PRO
1
120
How to Get Subject Matter Experts Bought In and Actively Contributing to SEO & PR Initiatives.
Avatar for Liv Day livdayseo
0
83
Ten Tips & Tricks for a 🌱 transition
Avatar for Manu Carrasco Molina stuffmc
0
85
Conquering PDFs: document understanding beyond plain text
Avatar for Ines Montani inesmontani
PRO
4
2.5k

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