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Docker.io

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Ignite talk about Docker.io Docker is an open-source project to easily create lightweight, portable, self-sufficient containers from any application. The same container that a developer builds and tests on a laptop can run at scale, in production, on VMs, bare metal, OpenStack clusters, public clouds and more.

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Docker.io

  1. 1. Ladislav  Prskavec  @abtris  -­‐    DEVEL  9.11.2013 1
  2. 2. Docker  is  an  open-­‐source  project     to  easily  create  lightweight,  portable,  self-­‐sufficient  containers   from  any  applicaHon.   2
  3. 3. The  same  container  that  a  developer  builds  and  tests  on  a   laptop  can  run  at  scale,  in  producHon,  on  VMs,  bare  metal,   OpenStack  clusters,  public  clouds  and  more. 3
  4. 4. 4
  5. 5. BeNer  than  VMs ★ Size 5
  6. 6. BeNer  than  VMs ★ Size   ★ Performance 6
  7. 7. BeNer  than  VMs ★ Size   ★ Performance   ★ Portability 7
  8. 8. BeNer  than  VMs ★ Size   ★ Performance   ★ Portability   ★ Hardware-­‐centric 8
  9. 9. Escape  dependency  hell ★ Cross-­‐plaRorm  dependencies 9
  10. 10. Escape  dependency  hell ★ Cross-­‐plaRorm  dependencies   ★ ConflicHng  dependencies 10
  11. 11. Escape  dependency  hell ★ Cross-­‐plaRorm  dependencies   ★ ConflicHng  dependencies   ★ Custom  dependencies 11
  12. 12. Here's  a  typical  Docker  build  process  (Dockerfile) from  ubuntu:12.10   run  apt-­‐get  update   run  DEBIAN_FRONTEND=noninteractive  apt-­‐get  install  -­‐q  -­‐y  python   run  DEBIAN_FRONTEND=noninteractive  apt-­‐get  install  -­‐q  -­‐y  python-­‐pip   run  pip  install  django   run  DEBIAN_FRONTEND=noninteractive  apt-­‐get  install  -­‐q  -­‐y  curl   run  curl  -­‐L  https://github.com/shykes/helloflask/master.tar.gz  |  tar  -­‐xzv   run  cd  helloflask-­‐master  &&  pip  install  -­‐r  requirements.txt 12
  13. 13. Under  the  hood ★ GO   ★ The  cgroup  and  namespacing  capabiliHes  of  the  Linux  kernel 13
  14. 14. Under  the  hood ★ GO   ★ The  cgroup  and  namespacing  capabiliHes  of  the  Linux  kernel   ★ AUFS,  a  powerful  union  filesystem  with  copy-­‐on-­‐write   capabiliHes 14
  15. 15. Under  the  hood ★ GO   ★ The  cgroup  and  namespacing  capabiliHes  of  the  Linux  kernel   ★ AUFS,  a  powerful  union  filesystem  with  copy-­‐on-­‐write   capabiliHes   ★ lxc,  a  set  of  convenience  scripts  to  simplify  the  creaHon  of   Linux  containers 15
  16. 16. Zero  downHme  deployment using  private  registry 16
  17. 17. App  running  in  prod  hNp://praguejs.cz   ! vagrant@precise64:~$  docker  ps   ! CONTAINER  ID                IMAGE                                                                         ! b2332dffe                      registry.abtris.cz:5000/praguejs:latest   -­‐  Build  local   >  docker  build  -­‐t=praguejs  .   -­‐  Test  local   >  docker  run  -­‐p  49200:3333  praguejs   hNp://localhost:49200   -­‐  Change  some  files   -­‐  Rebuild  &  test   >  docker  build  -­‐t  praguejs   >  docker  run  -­‐p  49200:3333  praguejs 17
  18. 18. Push  to  producHon   • Tag  image  in  order  to  push  it
 >  docker  tag  praguejs  registry.abtris.cz:5000/praguejs   • Push  image  to  local  registry
 >  docker  push  registry.abtris.cz:5000/praguejs   • On  producHon  server,  pull  image
 >  docker  pull  registry.abtris.cz:5000/praguejs   • Start  new  container  
 >  docker  run  -­‐d  -­‐p  127.0.0.1::3333  <image>   vagrant@precise64:~$  docker  ps   • Change  configuraHon  at  nginx/haproxy  and  restart   CONTAINER  ID                IMAGE                                                                         b2332dffe                      registry.abtris.cz:5000/praguejs:latest     • See  changes  live d45222331                      1b4f43asds   18
  19. 19. 19
  20. 20. hNp://m.doporucim.cz/Docker 20

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