Version "semi-courte" de ma prez "zero to hero" Devoxx.be présentée au Docker Meetup Rennes / Nantes

1. Meet the Dockers
#DV14 #Doc@kenrdeloof @ndeloof @dgageot

2. #DV14 #Docker @ndeloof @dgageot

3. #DV14 #Docker @ndeloof @dgageot

4. #DV14 #Docker @ndeloof @dgageot

5. #DV14 #Docker @ndeloof @dgageot

6. Why ?
#DV14 #Docker @ndeloof @dgageot

7. As
a
Developer
#DV14 #Docker @ndeloof @dgageot

8. I
code
using
…
#DV14 #Docker @ndeloof @dgageot

9. I
run
tests
on
…
#DV14 #Docker @ndeloof @dgageot

10. I
deploy
app
to
…
#DV14 #Docker @ndeloof @dgageot

11. and
(sometime)
it
fails
:’(
#DV14 #Docker @ndeloof @dgageot

12. #DV14 #Docker @ndeloof @dgageot

13. Some
told
me
to
…
#DV14 #Docker @ndeloof @dgageot

14. #DV14 #Docker @ndeloof @dgageot
Demo
of
a
VM

15. data (memory / disk)
application
services application runtime (JDK)
(virtual) File System
OS kernel
emulation
services Hypervisor
File System (libs, …)
OS kernel
#DV14 #Docker @ndeloof @dgageot

16. #DV14 #Docker @ndeloof @dgageot

17. #DV14 #Docker @ndeloof @dgageot

18. data (memory / disk)
application
services application runtime (JDK)
(virtual) File System
OS kernel
emulation
services Hypervisor
File System (libs, …)
OS kernel
hardware
virtualization
#DV14 #Docker @ndeloof @dgageot

19. #DV14 #Docker @ndeloof @dgageot

20. What’s
a
VM
#DV14 #Docker @ndeloof @dgageot

21. /sbin/getty
my App
dhclient
rsyslogd
sshd -D
cron
/sbin/init
#DV14 #Docker @ndeloof @dgageot

22. Some0mes
worse

23. Why
do
we
need
VM
?
✓ Different
Operating
System
✓ Different
CPU
Architecture
✓Work
with
multiples
versions
✓Move
application
to
a
different
server
#DV14 #Docker @ndeloof @dgageot

24. Docker
contract
:
#DV14 #Docker @ndeloof @dgageot

25. #DV14 #Docker @ndeloof @dgageot
Demo
of
a
simple
container

26. data (memory / disk)
application
services application runtime (JDK)
(virtual) File System
OS kernel
Hypervisor
File System (libs, …)
OS kernel
services
emulation
#DV14 #Docker @ndeloof @dgageot

27. #DV14 #Docker @ndeloof @dgageot

28. Union file system
copy-on-write
layers
#DV14 #Docker @ndeloof @dgageot

29. data data
jar
JDK
app.js
node
docker -D base image
File System (libs, …)
OS kernel
data
rails
ruby
#DV14 #Docker @ndeloof @dgageot

30. data data
data
foo.jar rails
JDK
bar.jar
docker -D base image
File System (libs, …)
OS kernel
ruby
#DV14 #Docker @ndeloof @dgageot

31. data data data
app.jar
JDK
docker -D base image
File System (libs, …)
OS kernel
#DV14 #Docker @ndeloof @dgageot

32. Infrastructure
as
Code
#DV14 #Docker @ndeloof @dgageot

33. Dockerfile
•simple (simplistic?) DSL
•pure text file
•share it, pull-request it
•execution cache
#DV14 #Docker @ndeloof @dgageot

34. #DV14 #Docker @ndeloof @dgageot Dockerfile

35. #DV14 #Docker @ndeloof @dgageot Who will use it ?

36. Developer

37. Not
on
Linux
?
#DV14 #Docker @ndeloof @dgageot

38. DEV
✓Quickly get third party
tools up-and-running
#DV14 #Docker @ndeloof @dgageot

39. DEV
✓Exact reproduction for
target environment
#DV14 #Docker @ndeloof @dgageot

40. DEV
✓`docker build` to replace
`mvn install`
#DV14 #Docker @ndeloof @dgageot

41. DEV
✓Reference environment
✓Bug reproduction scenario
#DV14 #Docker @ndeloof @dgageot

42. Tester

43. Test
resources
✓ Define build / test infra in your SCM
•Database
•Messaging Middleware
•…
#DV14 #Docker @ndeloof @dgageot

44. Test
✓ Automate reproducible tests
#DV14 #Docker @ndeloof @dgageot

45. #DV14 #Docker @ndeloof @dgageot Jenkins
+
Docker

46. QA
✓ Quickly get low-cost iso-production environment
#DV14 #Docker @ndeloof @dgageot

47. P.O.
/
Sales

48. Run
a
demo
✓ Ready to run demo
✓ No setup stress
✓ No technical skills required
✓ Can share with partners
#DV14 #Docker @ndeloof @dgageot

49. Production

50. Dev/Ops
a WAR archive is NOT what a sysadmin expect as delivery
+

51. best
DevOps
tool
so
far
(imho)

52. Dev/Ops
a WAR archive is NOT what a sysadmin expect as delivery
+
#DV14 #Docker @ndeloof @dgageot

53. #DV14 #Docker @ndeloof @dgageot

54. best
DevOps
tool
so
far
(imho)
#DV14 #Docker @ndeloof @dgageot

55. Separation
of
concern
Inside container
/var/log/myapp
On host
/mnt/backup/myapp/log
#DV14 #Docker @ndeloof @dgageot

56. Separation
of
concerns
Inside container
VOLUME /var/log/myapp
On host
/mnt/backup/myapp/log
#DV14 #Docker @ndeloof @dgageot

57. Ops
✓ Manage hardware / infrastructure
✓ Monitoring / backups
- Not apps « implementation details »
#DV14 #Docker @ndeloof @dgageot

58. Dev
✓ Develop simplest possible solution
✓ Configuration is a runtime constraint
- Not extra-extra-flexibile application
new WebServer().start(8080);
#DV14 #Docker @ndeloof @dgageot

59. Continuous
Delivery

60. from
SCM
to
production
#DV14 #Docker @ndeloof @dgageot

61. Continuous
Delivery
#DV14 #Docker @ndeloof @dgageot

62. Continuous
Delivery
•100% Reproducible environments
Dockerfile
build WAR
from sources
Dockerfile
run
acceptance
Dockerfile
build
deployable
docker run | docker build -
#DV14 #Docker @ndeloof @dgageot

63. build
chain
#DV14 #Docker @ndeloof @dgageot

64. What
for
?
✓ Cloud
✓ devices
✓ on-premises
more to come …
#DV14 #Docker @ndeloof @dgageot

65. #DV14 #Docker @ndeloof @dgageot New architectures

66. LightWeight
VM
?
#DV14 #Docker @ndeloof @dgageot

67. 1 process per container !
#DV14 #Docker @ndeloof @dgageot

68. data (memory / disk)
application
services application runtime (JDK)
services (virtual) File System
File System (libs, …)
OS kernel
#DV14 #Docker @ndeloof @dgageot

69. data (memory / disk)
application
application runtime (JDK)
data
service
runtime
services (virtual) File System
File System (libs, …)
OS kernel
vFS
#DV14 #Docker @ndeloof @dgageot

70. data (memory / disk)
application
application runtime (JDK)
data
service
runtime
services (virtual) File System
File System (libs, …)
OS kernel
vFS
#DV14 #Docker @ndeloof @dgageot

71. sample
:
syslog
host
rsyslog
/dev/log
/tmp/syslogdev
logger "hello"
/dev/log
http://jpetazzo.github.io/2014/08/24/syslog-docker/
#DV14 #Docker @ndeloof @dgageot

72. Diviser
pour
mieux
régner
Stop with monolithes !
#DV14 #Docker @ndeloof @dgageot

73. Diviser
pour
mieux
régner
embrace Micro-services
‣ « the unix way »
‣ domain focussed
‣ quick release cycles
‣ segregate resources
http://yobriefca.se/blog/2013/04/29/micro-service-architecture/
#DV14 #Docker @ndeloof @dgageot

74. Micro-­‐service
avec
Docker
LINK
#DV14 #Docker @ndeloof @dgageot

75. Time
to
Live
Virtual Machine :
some months (years ?)
Container(s) :
might just be few minutes
#DV14 #Docker @ndeloof @dgageot

76. Docker
pattern:
Ambassador
webapp redis
ambassador ambassador
#DV14 #Docker @ndeloof @dgageot

77. Docker
pattern:
service
discovery
webapp redis
--dns --dns
skyDNS
skyDock
#DV14 #Docker @ndeloof @dgageot

78. Docker
pattern:
Data
Container
postgres dbdata
--volumes-from
postgres-2
-v /dbdata
backup
#DV14 #Docker @ndeloof @dgageot

79. Immutable
infrastructures
#DV14 #Docker @ndeloof @dgageot

80. Upgrades
Upgrade applicatif = deploy a new image
#DV14 #Docker @ndeloof @dgageot

81. What
about
CM
?
#DV14 #Docker @ndeloof @dgageot

82. pimp
my
Dockerfile
Dockerfile
ONBUILD COPY /cookbooks
ONBUILD RUN chef-solo
Dockerfile
FROM chef-solo
#DV14 #Docker @ndeloof @dgageot

83. Orchestrate
Docker
load balancer
- hosts: web webapp
webapp
cache
monitoring
database replica
sudo: yes
tasks:
- name: run tomcat servers
docker: image=webapp ports=8080
#DV14 #Docker @ndeloof @dgageot

84. #DV14 #Docker @ndeloof @dgageot

85. Q?
#DV14 #Docker @ndeloof @dgageot