Live hacking with Docker Swarm at Oracle CODE Conference in Mexico City 2017: From a Raspberry Pi Cluster to OCCS and Wercker.

1. munz & more
Docker in the Oracle
Universe Including OCCS and Wercker
Oracle Code Mexico City 2017 Dr. Frank Munz

2. 2
Frank Munz
• Founded munz & more in 2007
• 17 years Oracle Middleware,
Cloud, and Distributed Computing
• Consulting and
High-End Training
• Wrote two WebLogic books
and one Cloud book

3. 3 things about
Docker

4. Solves the “Worked For Me!” issue
munz & more #4
OS tools, JDK,
patches, database
driver, libs,
appserver, domain,
deployment, tools,
scripts
Docker
OS utils, JDK, patches, database driver, libs,
appserver, domain, deployment, tools,
scripts
Integration,
Performance,
Acceptance
Testing
Production
dockerize it!
You can pass environment variables
for specific settings e.g. in prod
Docker Registry

5. Docker in the Cloud?
Supported by every major cloud provider:
munz & more #5
On premise -> all clouds
Docker
Registry
Docker Container Service
EC2 Container Service
Google Container Engine
Azure Container Service
Bluemix Containers

6. what should be your
biggest nightmare:
unknown and
unofficial images
10s of thousands
Docker Registry

7. fancy a demo?

8. Small Images / Microservices
You can have a real service in ...
Possible
Options:
busybox and
static binary
munz & more #8

9. Simple Life Inside Container
munz & more #9
processes
FS
mounts

10. Security

11. $ docker run -d –p
8080:9999 fmunz/micro

12. vs.

13. A stranger gives you a box at night and asks
you to connect it to your company network:
Would you do it?

14. Oracle Options

15. WebLogic
in a Docker
Container!

16. Official Support
#16^
Oracle support
does not require
you to use the
provided Docker
files
Oracle Product Official Support
GlassFish
MySQL yes
NoSQL
OpenJDK
Oracle Linux yes
OracleCoherence yes
OracleDatabase yes
OracleHTTPServer yes
OracleJDK yes
OracleTuxedo yes
OracleWebLogic yes

17. Oracle and Docker
To get images:
• Oracle Docker registry
• DIY: Dockerfile from Oracle github
To run Oracle Docker containers:
• Oracle Container Cloud Service
• Build and deploy with Wercker
munz & more #17

18. Docker Registry
Docker images from Oracle container registry
(restricted to US / OZ / GB!)
Get image:
$ docker login container-registry.oracle.com
$ docker pull container-registry.oracle.com/java/serverjre:8
munz & more #18

19. Just Drop Server JRE and WLS Installer
munz & more #19
$ cd java-8
$ docker build -t oracle/jdk:8 .
Sending build context to Docker daemon 4.096 kB
Step 1 : FROM oraclelinux:latest
latest: Pulling from library/oraclelinux
10ec637c060c: Downloading 4.865 MB/97.84 MB
...
$ sh buildDockerImage.sh -g -v 12.2.1.1
...
https://github.com/oracle/docker-images

20. Extend the WLS image
Sample script provided:
• Dockerfile to extend WLS image
• Run WLST script to create domain
• Create boot.properties
• Expose NM, Server ports
munz & more #20
Linux Base Image
JDK Image
WebLogic Image
WLS Domain Image

21. http://www.oracle.com/us/pro
ducts/middleware/cloud-app-
foundation/weblogic/weblogic
-server-on-docker-wp-
2742665.pdf
Oracle Whitepaper
WebLogic on Docker

22. munz & more #22
Good Docker book by
J. Turnbull / $ 9.99
(covering Docker 1.13)

23. Orchestration /
Cluster Manager

24. Cluster Manager Options
On Premise Cloud
Docker Swarm Docker 1.12 Docker DC (EE)
Kubernetes DIY Google
Oracle Oracle Registry
Oracle Git
Oracle CCS
munz & more #24

25. Welcome
Mini J

26. Kubernetes (K8s)
• Kicked off by Google’s Borg
• Most active github project
• Orchestration for containers, e.g. Docker
• Declarative configuration
• Service discovery
• Rolling upgrades
munz & more #26

27. K8s
• YAML configuration
• Pod: Container(s) sharing IP, network, filesystem
– IP is ephemeral
– Uses Labels
• Replication Controller -> Replica Set
– Manages PODs (restarts replicas based on labels)
• Services
– Proxy for pod
– Permanent IP
munz & more #27

28. Docker Swarm
• Native Docker cluster with same API as
a single engine -> part of Docker
• Fast provisioning, about 500 msec
• Scheduling: spread, binpack, rand
• No insecure mode J
munz & more #28

29. Design Goals for Mini
• Hands-on Raspi experience
• Distributed Kubernetes setup
& Docker Swarm setup
• HA / failover / rolling updates
• Have a fun project
munz & more #29
Others have build
Raspi clusters as well
and a lot of credit
goes to them, e.g. to
Roland Huss, Alex Ellis
etc

30. Design Decisions for Mini
• Hypriot Linux
• 4 node cluster
• ARM based -> runs ARM Docker images
• Preferred Gbit switch, but WIFI only
– Better I/O throughput with separate WIFI chip
• Wifi router in hotspot mode
– Mac OS issue with NAT
• DIY: github
https://github.com/fmunz/raspicluster
munz & more #30

31. Paper bag Computer Raspberry Pi
• 1.2 GHz Quad Core ARM cortex-a53
• RAM: 1 GB LPDDR2 Speicher
• Dual Core VideoCore, 1920x1080
• Bluetooth
• 802.11 B/G WIFI
• Boots from micro SD card
• 38 €
munz & more #31

32. DIY Raspi Docker Cluster
munz & more #32
Component Price
Raspi 4x 38€
Micro SD 4x 11€
Power 28€
Wifi 22€
Case 30€
Wires 10€

33. Kubernetes or Swarm?
• Swarm wasn’t impressive when released,
but this has changed
• Swarm is much easier to understand
and to operate
• Swarm covers a lot of what K8s does
• Swarm is tightly linked to Docker API
-> harder to replace Docker with e.g. Rocket
munz & more #33

34. Docker Swarm
munz & more #34

35. Google Kubernetes
munz & more #35

36. Docker Containers in Kubernetes
munz & more #36

37. OCCS

38. OCCS
• Easy way to run Docker container in Oracle
cloud
• No need to install Docker, buy machines etc.
• Integrates with Docker hub and Oracle
Container registry
• Does not use Kubernetes or Docker Swarm

39. fancy a demo?

40. Dashboard

41. Services
munz & more #41

42. Ressource Pools
munz & more #42

43. Service Editor

44. Deployment Pulls Image
munz & more #44

45. Running Grafana in OCCS
munz & more #45

46. • Grafana Docker image
• Runs on OCCS
• Measures Oracle Cloud DNS/ping from
worldwide locations
• Run it on OCCS without knowing much
about Docker or Grafana!
munz & more #46

47. Webcasts on Youtube
munz & more #47
https://www.youtube.com/watch?v=YFWAUEjtTpk https://www.youtube.com/watch?v=aRj0WK6uids

48. Wercker

49. Wercker
• Recently acquired by Oracle
• Pipelines execute steps on code
– Pipelines == series of steps
– Execute inside Docker container
• Workflows == chained and branched pipelines
• Quickly provision ready to run infrastructure
– Push images to any registry
– Restart OCCS via webhooks
munz & more #49

50. https://app.wercker.com
munz & more #50

51. fancy a demo?

52. Predictions
• Swarm will take its share from Kubernetes.
• OCCS is the easier solution for OPC
• You will not dockerize 90% of your enterprise IT
in the next 24 months.
• Docker is the new Linux.
Be ready to experience that feeling we had
with Linux 13 years ago J
• Sometimes Docker is the new PaaS.
munz & more #52

53. Conclusion
• Docker is used in production today
• Docker, but more so cluster managers
are still evolving
• Oracle caught the trend early – good!
• Many Oracle are supported
• OCCS saves you from the heavy lifting
• Wercker creates and deploys Docker images
munz & more #53

54. TL;DR @docker / #cloud
works for me: solved / cross cloud
/ just Docker is not enough /
#swarm is the easier #k8s / not a
security risk / many products
offered as images / official Oracle
support & OCCS & Wercker / consider
cloud services.
@frankmunz

55. www.munzandmore.com/blog
facebook.com/cloudcomputingbook
facebook.com/weblogicbook
@frankmunz
https://www.linkedin.com/in/
frankmunz/
youtube.com/weblogicbook
-> more than 50 web casts
Don’t be
shy J