Docker Pre Hands-on

Dockerハンズオン前の知識編

Transcript

1. DockerϋϯζΦϯલ ४උ dbaba@yourinventit.com Aug. 25 2014 Friday, August 29, 14
2. Docker • OS (linux)ϨϕϧͷԾ૝ԽͰɺLinux KernelΛڞ༗ͨ͠· ·CPUͳͲͷϦιʔεΛίϯςφͱ͍͏୯ҐͰ۠੾Δ͜ ͱ͕Ͱ͖ΔLXC(Linux Containers)ͱ͍͏ٕज़͕ݩωλɻ LXCͷৄࡉ͸Wikipedia΁ • Լهͷهࣄ΍DockerͷαΠτΛઌʹݟ͓͍͍ͯͯͩ͘͞ http://www.atmarkit.co.jp/ait/articles/1405/16/ news032.html https://www.docker.com/ Friday, August 29, 14
3. ຊ೔ͷ಺༰ • DockerͱVagrantͷൺֱ • DockerͱLXCͷҧ͍ • DockerΛOSX/WinͰ࢖͏ • Docker Private RegistryͱDocker Hub • DockerͰͷయܕతͳ࡞ۀ • Docker/Boot2docker͋Δ͋Δ Friday, August 29, 14
4. Docker͸Vagrantͱ Կ͕ҧ͏ʁ - Host OS Guest OS Virtualizat ion Πϝʔδ ୯Ґ Docker Linux Linux LXC ίϯςφ Vagrant Linux/BSD/ Windows/ OSX etc. Linux/BSD/ Windows etc. VirtualBox /VMWare/ etc. Ծ૝ Ϛγϯ Friday, August 29, 14
5. DockerͱVagrantͷ ࢖͍෼͚͸ʁ • Docker • LinuxΛ࢖͏ͳΒجຊͪ͜Βɻkernel cgroup΍namespaces ͱ͍͏࢓૊ΈʹΑͬͯϦιʔε੍ޚɾִ཭͕ͳ͞ΕɺΑ Γ௿ϨϕϧͰͷԾ૝ԽΛߦ͏VirtualBoxͳͲΑΓ΋ޮ཰ తʹϦιʔεͷִ཭Λߦ͑Δ • Vagrant • LinuxҎ֎Λ࢖͏ͱ͖ • ग़యɿStackOverflow (http://stackoverflow.com/a/16761439) Friday, August 29, 14
6. DockerͱLXCͷҧ͍ • LXCʹൺ΂ͯԼهͷ఺ΛڧԽ͍ͯ͠Δͷ͕Docker • Ҡ২ੑɿDocker͑͞ಈ͚͹ίϯςφ͸Ͳ͜Ͱ΋ಈ͘ • ΞϓϦσϓϩΠ໨తɿԾ૝ϚγϯΛಈ͔͢ͷ͕໨తͰ͸ͳ͍ • ΠϝʔδϏϧυͷ࢓૊ΈɿίϯςφΠϝʔδΛ࡞Δ࢓૊ΈΛఏڙ͍ͯ͠ΔɻͰ΋Π ϝʔδΛ࡞ΔͨΊͷπʔϧ͸ͳ͍ͷͰɺ֤ࣗγΣϧͳͲͰ༻ҙ͢Δ͜ͱ • ࠩ෼؅ཧɿཤྺͱͱ΋ʹΠϝʔδΛࠩ෼Ͱ؅ཧ͍ͯ͠Δ • Πϝʔδͷ࠶ར༻ɿࠩ෼؅ཧΛར༻ͯ͠೿ੜΠϝʔδΛ࡞Δ͜ͱ͕Ͱ͖Δ • ڞ༗ɿDockerHubͰΠϝʔδΛڞ༗ • πʔϧͷΤίγεςϜɿ৭ʑͭͳ͕Δπʔϧ͕͋Δ • ਖ਼֬ͳઆ໌͸ͪ͜Β→DockerͷFAQ (https://docs.docker.com/faq/) Friday, August 29, 14
7. DockerΛOSX/WinͰ࢖͏ • Boot2dockerͱ͍͏Ծ૝ϚγϯΛ࢖͏ • LinuxͰͳ͚Ε͹Docker͸ಈ࡞͠ͳ͍ͷ Ͱɺগͳ͘ͱ΋Linux؀ڥΛ༻ҙ͠ͳ͍ ͱ͍͚ͳ͍ →ͳͷͰBoot2dockerͱ͍͏Linux؀ڥ͕ ඞཁͱͳͬͨ Friday, August 29, 14
8. Boot2docker • VirtualBoxͳͲͰಈ࡞͢Δ • TinyCore Linux(TCL)ͱ͍͏૊ΈࠐΈLinuxͰ͸͓ͳ͡Έͷ LinuxΛ࢖༻ • UNIXίϚϯυ͸ɺBusyBoxʢ௨শɺ૊ΈࠐΈLinuxͷΞʔ ϛʔφΠϑʣͱ͍͏ػೳݶఆ൛͕ೖ͍ͬͯΔ • TCLࣗମ͸ϑοτϓϦϯτ͕ͱͯ΋খ͘͞Ͱ͖Δ͏͑ (20~40MB)ɺىಈ͕ૣ͍ • Boot2docker΋ISOϑΝΠϧͰ20਺MB Friday, August 29, 14
9. Boot2dockerΛೖख͢Δ • WindowsΠϯετʔϥʔ • https://github.com/boot2docker/windows-installer • OSXΠϯετʔϥʔ • https://github.com/boot2docker/osx-installer • export DOCKER_HOST=tcp:// 192.168.59.103:2375 Λࢦఆ͢Δͱಁաతʹར༻Ͱ͖Δ(࢒೦ͳ͕Β OSXͷΈ) Friday, August 29, 14
10. Docker HubͱϓϥΠϕʔτ ϨδετϦ • Docker Hub • ίϯςφΠϝʔδΛڞ༗Ͱ͖Δ • ࣗ෼ͰϏϧυ͠ͳͯ͘Α͍͚ͲɺDL͕ඞཁ • Dockerར༻ऀͰڞ༗͢Δ • GitHubͷΑ͏ͳ΋ͷɻιʔεͷ୅ΘΓʹΠϝʔδΛڞ༗͢Δ • ϓϥΠϕʔτϨδετϦ • ݶఆͨ͠ൣғͰΠϝʔδΛڞ༗Ͱ͖Δ • ӬଓԽ෦෼ΛS3ͳͲ৭ʑબ୒Ͱ͖Δ Friday, August 29, 14
11. DockerϨδετϦ Private Object Storage (S3/Azure Storage/etc.) Docker Registry Container Docker Private Registry Listening on localhost:5000 Docker Hub hub.docker.com Friday, August 29, 14
12. DockerϨδετϦ Private Object Storage (S3/Azure Storage/etc.) Docker Registry Container Docker Private Registry Listening on localhost:5000 Docker Hub hub.docker.com શར༻ऀͰ ڞ༗͢ΔϦϙδτϦ Friday, August 29, 14
13. DockerϨδετϦ Private Object Storage (S3/Azure Storage/etc.) Docker Registry Container Docker Private Registry Listening on localhost:5000 Docker Hub hub.docker.com ಛఆͷൣғ಺ ʢࣾ಺ͳͲʣͰڞ༗͢ΔϦ ϙδτϦ Friday, August 29, 14
14. DockerϨδετϦ Private Object Storage (S3/Azure Storage/etc.) Docker Registry Container Docker Private Registry Listening on localhost:5000 Docker Hub hub.docker.com ϓϥΠϕʔτ ϨδετϦͷ࣮ࡍͷอ ଘ৔ॴ Friday, August 29, 14
15. DockerͰͷ࡞ۀ • DockerΛར༻͢Δ࡞ۀͷయܕ • ΠϝʔδΛ࡞Δ→Docker༻ޠͰ͸Ϗϧυͱ͍͏ɻbuildίϚϯυ • ίϯςφΛىಈ͢Δ→runίϚϯυ • ίϯςφ΁઀ଓ͢Δ→attachίϚϯυ • ίϯςφΛࢭΊΔ→killίϚϯυ • ఀࢭͨ͠ίϯςφΛࣺͯΔ→rmίϚϯυ • ΠϝʔδΛࣺͯΔ→rmiίϚϯυ • ىಈதɾఀࢭதͷίϯςφΛΈΔ→ps/inspectίϚϯυ Friday, August 29, 14
16. Docker͋Δ͋Δ • ίϯςφ͕͙͢ࢭ·Δ • CMD΍ΤϯτϦϙΠϯτͷϓϩηε͕ऴΘͬͯ͠·͏ ͔όοΫάϥ΢ϯυʹೖͬͯ͠·͏͜ͱʹΑΓى͜Δ • ϑΥΞάϥ΢ϯυϓϩηεͰಈ͔͢Α͏ʹͨ͠Γɺrun ίϚϯυʹͯ-iҾ਺Ͱඪ४ೖྗΛৗʹΞλονͨ͠ ΓɺrunίϚϯυʹͯɺ/bin/sh -c /bin/shͳͲͱ͢Δํ๏ ΋͋Δʢ໌ࣔతʹγΣϧΛىಈ͢Δํ๏ʣɻίϯςφ ಺ͰϝϯςΛ͢ΔͳͲಛघͳ༻్Ҏ֎͸΍Βͳ͍͜ͱ Friday, August 29, 14
17. Docker͋Δ͋Δ • ίϯςφΛΞλονͯ͠΋Կ΋ى͜Βͳ͍ • γΣϧΛίϯςφͰىಈ͍ͯ͠Δ৔߹͸ɺ ΤϯλʔΛԡͤ͹γΣϧ͕ग़ͯ͘Δ • γΣϧҎ֎ͷ৔߹͸ɺඪ४ೖྗΛѻ͍ͬͯ ͳ͍৔߹͸ɺΩʔϘʔυೖྗʹ൓Ԡ͠ͳ͍ ͨΊݻ·ͬͨΑ͏ʹͳΔ →ͦͷ৔߹͸ɺCtrl + P, Qͱͯ͠཭୤ Friday, August 29, 14
18. Docker͋Δ͋Δ • ίϯςφΛΞλονͯ͠Ctrl+Cͯ͠཭ ୤͢Δͱίϯςφ͕ࢭ·Δ • Ξλονͨ͠৔߹͸ɺCtrlΛԡͨ͠· ·P→QΛԡͯ͠཭୤͢Δɻͦ͏͠ͳ ͍ͱϓϩηε͕ࢭ·ΔͷͰɺ݁Ռͱ ͯ͠ίϯςφ΋ࢭ·Δ Friday, August 29, 14
19. Docker͋Δ͋Δ • ίϯςφʹSSHͨ͘͠ͳΔ • ༨ܭͳϓϩηεΛ্͛ΔͱίϯςφͷϦιʔεΛ৯͏ͷ Ͱجຊ͠ͳ͍΄͏͕Α͍ɻͰ΋΋ͪΖΜsshdΛ্ཱͪ͛ Δ͜ͱ͸Մೳ • 1ίϯςφʹ1ϓϩηεΛ৺͕͚Δɻ͠ΐ͏͕ͳ͍࣌͸ఘ ΊΔ • ঢ়ଶʹґଘ͠ͳ͍ίϯςφ಺ͷϑΝΠϧ΍؀ڥม਺ͷΈ ؔ৺͕͋Δ৔߹͸ɺίϚϯυʹγΣϧ(/bin/sh -c /bin/bash ͳͲ)Λࢦఆͯ͠run͢Ε͹ίϯςφͷதΛௐ΂ΒΕΔ Friday, August 29, 14
20. Docker͋Δ͋Δ • ίϯςφͷSyslogΛݟͨ͘ͳΔ • DockerͰར༻͢Δ৔߹͸̍ϓϩηεʹ͢Δ ͨΊʹSyslog͸ΦϑɻͰ΋࢖͏͜ͱ͸Մೳ • DockerͷUbuntuΠϝʔδʹ͸Rsyslogd͕ ೖ͍ͬͯΔʢಈ࡞͸͠ͳ͍ʣͷͰONʹ͢ Ε͹ಈ͔ͤΔ Friday, August 29, 14
21. Docker͋Δ͋Δ • ίϯςφ΁ϗετϚγϯͷ֎͔Βܨ͛ͨ͘ͳ Δ • runίϚϯυͰ-pΛࢦఆ͢Δ͜ͱʹΑͬͯϗ ετϚγϯͱͷϙʔτϑΥϫʔυΛࢦఆͰ ͖Δ • ग़యɿhttp://docs.docker.com/reference/run/ #expose-incoming-ports Friday, August 29, 14
22. Docker͋Δ͋Δ • ଞͷϗετͷίϯςφʹܨ͛ͨ͘ͳΔ • ambassador patternʹΑΓɺଞͷϗετͱͷ ΍ΓͱΓΛઐ໳తʹߦ͏֎ަ׭໾ίϯςφ Λ࡞Δํ͕ࣜਪ঑͞Ε͍ͯΔɻϗετ͕੾ ΓସΘͬͯ΋ॊೈʹରԠͰ͖ΔͨΊ • ग़యɿhttps://docs.docker.com/articles/ ambassador_pattern_linking/ Friday, August 29, 14
23. Docker͋Δ͋Δ • ίϯςφΛࢭΊͨΒಉ࣌ʹΫϦʔϯͨ͘͠ͳΔ • docker killͱrmΛผʑʹߦ͏ͷ͸໘౗ • -nameͰ໊લࢦఆ͍ͯ͠ͳ͍࣌͸ɺawk΍cut ͳͲΛ࢖ͬͯίϯςφIDΛಛఆ͢Δ ྫʣ CONTAINER_ID=`docker ps | grep $1 | awk -F' ' '{ print $1 }'` docker kill ${CONTAINER_ID}; docker rm ${CONTAINER_ID} docker kill <-name>;docker rm <-name> Friday, August 29, 14
24. Docker͋Δ͋Δ • DockerfileͷCMDΛແࢹͯ͠ىಈ͢Δ • runίϚϯυʹͯίϚϯυΛࢦఆ͢Ε͹Dockerfile ͷRUNࢦఆ͸ແࢹ͞ΕΔ • ͔͠͠ɺENTRYPOINTͷࢦఆΛ্ॻ͖͍ͨ࣌͠ ͸͜ͷํ๏Ͱ͸ͳ͘ɺ--entrypointΛ࢖͏ ग़యɿhttp://docs.docker.com/reference/run/ #entrypoint-default-command-to-execute-at-runtime Friday, August 29, 14
25. Docker͋Δ͋Δ • DockerfileͷCMDͱENTRYPOINTͷҧ͍͕Θ͔Βͳ͍ • ENTRYPOINT͸ɺίϯςφࣗମΛ͔͋ͨ΋ͻͱͭͷ࣮ߦ ϑΝΠϧͷΑ͏ʹݟͤΔͨΊͷ΋ͷ→runίϚϯυΛ࢖ͬ ͨ࣌ɺΠϝʔδϑΝΠϧͷࢦఆΑΓޙΖ͸ίϚϯυͷҾ ਺ͷΑ͏ʹѻΘΕΔ • CMD͸ɺԿͷϑΝΠϧΛ࣮ߦ͢Δ͔Λ໌ࣔతʹࢦఆ͢Δ ͜ͱ͕Ͱ͖Δ • ग़యɿhttp://docs.docker.com/reference/run/#cmd-default- command-or-options Friday, August 29, 14
26. Docker͋Δ͋Δ • DBίϯςφΛམͱͯ͠ফ͢ͱσʔλ΋ফ͑Δ • ϑΝΠϧͳͲ͸σʔλઐ༻ίϯςφΛ࡞੒ͯͦ͠ΕΛڞ༗͢Δ (ग़యɿhttps://docs.docker.com/userguide/dockervolumes/#creating- and-mounting-a-data-volume-container) • ͨͩͦ͠ͷίϯςφ΋མͱͨ͠ޙrm͢Δͱσʔλ͸ফ͑Δ • όοΫΞοϓΛऔΔ৔߹͸ɺσʔλઐ༻ίϯςφܦ༝Ͱϗετ Ϛγϯ΁ॻ͖ग़͢ͳͲ໌ࣔతͳॲཧΛߦ͏͜ͱ (ग़యɿhttps://docs.docker.com/userguide/dockervolumes/#backup- restore-or-migrate-data-volumes) Friday, August 29, 14
27. Docker͋Δ͋Δ • σʔλઐ༻ίϯςφͷσʔλΛόοΫΞοϓͷͨΊί ϛοτ͠Α͏ͱ͢Δ • σʔλઐ༻ίϯςφͷϚ΢ϯτϘϦϡʔϜ͸ɺΠϝʔ δมߋͷର৅֎ͳͷͰɺίϛοτͯ͠΋ҙຯ͕ͳ͍ →σʔλ͸࢒Βͳ͍ʂ • ໘౗Ͱ΋લड़ͷͱ͓ΓݸผʹϑΝΠϧ΍σΟϨΫτ ϦΛόοΫΞοϓ͢Δ͜ͱ • Boot2dockerར༻࣌͸ɺsaveͰҰ࣌อଘ͸Ͱ͖Δ Friday, August 29, 14
28. Docker͋Δ͋Δ • ίϯςφ͝ͱʹϩάϑΝΠϧ͕֦ࢄ͢Δ • Fluentd΍LogStashΛ༻͍ͯऩूͷ࢓૊ΈΛ༻ ҙ͢Δɻίϯςφʹಉډ͠ͳ͍ܗ͕๬·͠ ͍ →σʔλઐ༻ίϯςφʹϩάϑΝΠϧΛू ໿ͤ͞Δͱ͍͏ํ๏΋͋Δ • ElasticSearchʹू໿͢Δͷ͕Α͍ Friday, August 29, 14
29. Docker͋Δ͋Δ • ίϯςφىಈ࣌ʹଞͷίϯςφͷIPΞυϨεΛࢦఆͯ͠ى ಈ͢Δ • ܨ͍͛ͨίϯςφ͸ىಈ࣌ʹlink͓ͯ͘͠ • ͦ͏͢Δͱɺίϯςφىಈ࣌ʹ؀ڥม਺ͰIPΞυϨε ΍ϙʔτΛऔಘͰ͖Δ • ىಈγΣϧ·ͨ͸εΫϦϓτ಺Ͱ؀ڥม਺ܦ༝Ͱ৘ใ Λऔಘ͢Δ͜ͱ͕Ͱ͖Δ • ग़యɿhttps://docs.docker.com/userguide/dockerlinks/ Friday, August 29, 14
30. Docker͋Δ͋Δ • ଞͷίϯςφͷIPΞυϨεͰ͸ͳͯ͘ϗετ໊Ͱ؅ཧ͢Δ • ܨ͍͛ͨίϯςφ͸ىಈ࣌ʹlink͓ͯ͘͠ • ىಈ࣌ʹ/etc/hostsʹϦϯΫ࣌ͷΤΠϦΞε໊Ͱ໊લղܾͰ ͖ΔΑ͏ʹͳ͍ͬͯΔ ྫɿMySQLίϯςφΛdbͱ͍͏໊લͰϦϯΫͨ͠ͱ͖→ping dbͱ͢ΔͱIPΞυϨε͕ฦΔ • DBͳͲʹଞίϯςφ΁ͷѼઌΛอଘ͢Δ৔߹͸͜ͷํ๏Λ औΔ • ग़యɿhttps://docs.docker.com/userguide/dockerlinks/ Friday, August 29, 14
31. Docker͋Δ͋Δ • linkઃఆͤͣʹࠓىಈ͍ͯ͠ΔίϯςφͷIPΛ஌Γ ͍ͨ • SkyDNSͱSkyDockΛ࢖͏ • ίϯςφͷىಈɾఀࢭ࣌ʹউखʹDNSઃఆͯ͠ ͘ΕΔ • ίϯςφىಈ࣌ʹ --dnsࢦఆ͢Δ͜ͱ • ग़య:https://github.com/crosbymichael/skydock Friday, August 29, 14
32. Docker͋Δ͋Δ • ίϯςφΛىಈͨ࣌͠ʹIDΛม਺ʹೖ ΕΔ(bash) • CONTAINER_ID=`docker run ....` • 12ܻͷγϣʔτIDΛͱΔʹ͸ SHORT_ID=${CONTAINER_ID:0:12} Friday, August 29, 14
33. Boot2docker͋Δ͋Δ • bash΍MakeͳͲ͕ૉͷ··Ͱ͸࢖͑ͳ͍ • TCLͷΞϓϦ؅ཧίϚϯυͰΠϯετʔϧ͢Δ ྫʣtce-load -wi bash.tcz • tce-abίϚϯυͰର࿩ܕͷΞϓϦ؅ཧ΋Ͱ͖Δ • ͜ΕͰΠϯετʔϧͨ͠ΞϓϦ͸boot2docker ΠϯελϯεΛऴྃͤ͞Δͱফ͑Δ Friday, August 29, 14
34. Boot2docker͋Δ͋Δ • GitHubͰCloneͨ͠DockerfileϓϩδΣΫτͰؔ ࿈͢ΔγΣϧ͕ΤϥʔͱͳΔ • BusyBoxલఏͰͳ͍ίϚϯυΛ࢖͍ͬͯΔͨ Ί • ରԠͱͯ͠͸ɺBusyBoxͰಈ͔ͤΔΑ͏ʹ͜· Ίʹख௚͢͠Δ͔͠ͳ͍ ྫʣxargs -I͸࢖͑ͳ͍ɺseq -f͸࢖͑ͳ͍ͳͲ Friday, August 29, 14
35. Boot2docker͋Δ͋Δ • ϚγϯΛεϦʔϓͤͯ͞࠶։͢Δͱ͕࣌ؒͣΕΔ • ntpclientίϚϯυʹΑΓखಈͰߦ͏ɻεϦʔϓ෮ ؼͷΠϕϯτΛBoot2dockerଆͰऔಘͰ͖ͳ͍ͷ Ͱ࣌ؒௐ੔͕ద੾ͳͱ͖ʹಈ͔ͳ͍ͷ͕ݪҼ • ྫʣ sudo ntpclient -s \ -h time.asia.apple.com Friday, August 29, 14
36. Boot2docker͋Δ͋Δ • Boot2dockerΛऴྃ (down/poweroff) ͤ͞ΔͱҰ෦ͷঢ়ଶ͕ফ͑Δ • Boot2dockerͷঢ়ଶ͸ɺ໌ࣔతʹอଘ͠ͳ͚Ε͹ফ͑Δ ʢEC2ͷTerminate͔Stopͷҧ͍ʣ ྫʣboot2docker save • ͨͩ͠ɺEBSͷΑ͏ͳϘϦϡʔϜ(/dev/sda1)ʹอଘ͢Ε͹ σʔλ͸࢒Δ →ಈ࡞தɺఀࢭதͷίϯςφ΍Πϝʔδ͸ͪ͜Βʹอଘ͞ΕΔ • tce-loadͰΠϯετʔϧ͢ΔΞϓϦ͸ϘϦϡʔϜ্ʹ͸࢒Βͳ ͍ʢrootfsʹه࿥͞ΕΔʣͷͰΠϯελϯεΛམͱ͢ͱফ͑Δ Friday, August 29, 14
37. Boot2docker͋Δ͋Δ • ࡞ۀதͷঢ়ଶΛҰ࣌อଘ͍ͨ͠ • ίϯςφΛىಈͨ͠··ɺsave·ͨ͸ down͢Δ • ͨͩ͠ɺdownͤ͞ΔͱπʔϧྨͳͲ rootfsྖҬʹஔ͍ͨ΋ͷ͸࣍ճىಈ࣌ ʹͳ͘ͳ͍ͬͯΔͷͰ஫ҙ Friday, August 29, 14
38. Boot2docker͋Δ͋Δ • ࡞ۀதͷঢ়ଶͰεφοϓγϣοτΛͱ Γ͍ͨ • VirtualBox΍VMwareͷػೳͰεφοϓ γϣοτΛͱΔ →ίϯςφΠϝʔδͳͲ͸อଘ͞ΕΔ Friday, August 29, 14
39. ࣭໰ͳͲ Friday, August 29, 14
40. ࣍ճ४උ • Docker·ͨ͸Boot2docker/VirtualBoxͷΠϯετʔϧ (version 1.1.2) • OSX Boot2dockerϢʔβʔͷΈ • DOCKER_HOSTΛઃఆ͓ͯ͘͠ • BitBucket͔Βprivate-dockerfilesͷclone • ϋϯζΦϯPDFهࡌͷ࡞ۀ಺༰ͷ͏ͪࣗ෼ͰਐΊΒΕ Δ΋ͷ͸ߦ͓͍͍ͬͯͯͩ͘͞ →μ΢ϯϩʔυ͕ूத͢ΔͷΛආ͚ΔͨΊ Friday, August 29, 14