Docker and Pharo @ZWEIDENKER Talk held at ESUG18, Cagliary, Italy.

1. Docker and Pharo
@

2. We are…
Pierre Chanson
Marcus Denker
Norbert Hartl

3. • Founded in 2009 (10 Year party next year!)
• 13 people in Cologne (Germany) and Ho Chi Minh City
(Vietnam)
• iPhone, Android, Web, Backend. Pharo!
• You might know the german Call A Bike or Flinkster Car
Sharing.

4. This presentation
• Server infrastructure
• Application deployment, Monitoring
• Workflow: following one commit step-by-step

5. The project
• Big project: mobility service for Airbus
• Need for scale: +10k users in a few hours timeframe
• Need not to be killed by complexity

6. API
message
queue
cars
bikes
cars
trains
buses
API
Micro services

7. Iceberg Jenkins
Docker HubDocker Swarm
db
Pharo Pharo Pharo
Pharo Pharo
Pharo Pharo

8. Regular day of coding at the office…

9. Regular day of coding at the office…
self flag: #bob
true become: false

10. Regular day of coding at the office…
Gotta show this to my boss !
self flag: #bob
true become: false

11. Regular day of coding at the office…
How ???
Gotta show this to my boss !
self flag: #bob
true become: false

12. Iceberg Jenkins
Docker HubDocker Swarm
db
Pharo Pharo Pharo
Pharo Pharo
Pharo Pharo

13. Git commit
Git push
Pull request
Review…
“Good job” merge

14. Iceberg Jenkins
Docker HubDocker Swarm
db
Pharo Pharo Pharo
Pharo Pharo
Pharo Pharo

15. Wassup ? (every 10 mins)
Alright, pull
run tests
docker …

16. What is Docker?
• Think about it as a Smalltalk image, but for Linux
• Docker Image is build from a description (Dockerfile)
• Then we can run it (once or multiple times)

17. Wassup ? (every 10 mins)
Alright, pull
run tests
docker-compose build
docker-compose push

18. Iceberg Jenkins
Docker HubDocker Swarm
db
Pharo Pharo Pharo
Pharo Pharo
Pharo Pharo

19. Iceberg Jenkins
Docker HubDocker Swarm
db
Pharo Pharo Pharo
Pharo Pharo
Pharo Pharo

20. Ansible: Orchestration
• We need to start lots of stuff (Pharo, Webserver,
MessageQueue, Database…)
• Ansible is a way to script typical unix admin things
• Both used to setup the Linux machines and to start
Docker

21. ansible-playbook -i myInventory myYml.yml
(there is nothing worse than yaml!)

22. Iceberg Jenkins
Docker HubDocker Swarm
DB

23. Docker: Swarm
• We want to run on multiple machines
• Swarm allows to run “services” which scale to multiple
docker containers
• Manages Distribution, restart…

24. Iceberg Jenkins
Docker HubDocker Swarm
DB

25. Monitoring
• Lots of machines (virtual and real)
• Lot of different software (database, web, message queue,
lots Pharo images)
• How do we look at it?

26. Monitoring
• Grafana
• Dashboard
• Alarms: Get Notifications via Mail and in Slack
• Docker images provide data via REST API
• Pharo GC, Zinc Requests

28. internet
API
message
queue
web client
load balancer
bikes
DB
cars
DB
trains
DB
buses
DB
API
DB

29. load balancer
Physical servers
API
DB DB DB
bikes
bikes
cars
carsbuses
trains
buses
API

30. And that x 3
• We have 3 Swarms:
• Alpha (development)
• Beta (testing)
• Production
• And you can run the whole setup on your laptop, too!
+100 Pharo images overall in
our cluster

31. Much more…
Pharo Library for Docker Swarm (work in progress)

32. Much more…
• Lots of in-house libs
• Visualise Docker Swarm with Roassal (first work)
• Docker Health Check from Pharo
• Server for and Pharo app for Fuel Stack Traces
• DockerEngine + OpenAPI
Tell us what you want to see at the Show Us Your Project !