This document discusses Docker containers and orchestration tools. It begins with an overview of Docker containers and how they differ from traditional virtual machines. It then covers four Docker tools: Docker Machine for provisioning hosts, Docker Compose for defining multi-container applications, Docker Swarm for orchestrating containers across a cluster of nodes, and Docker Network for container networking. It demonstrates using these tools together to deploy a sample application across a three node Docker swarm cluster.

1. @durdn#VoxxedBerlin
Platinum Sponsor
Higher order infrastructure:
from Docker basics to cluster management
Nicola Paolucci
Atlassian

2. 2
Time me and ring a bell if I am over it. Just kidding I’ll
be over by a bit but it’s ok. We’re friends.
Three minute Docker intro?

3. 3
BINS/LIBS
GUEST OS
HYPERVISOR
HOST OS
SERVER
ROBUST
MONOLITHIC
SLOW TO BOOT
HEAVY
OVERHEAD
APP A
BINS/LIBS
GUEST OS
APP B
DEFINITIONS
Traditional Virtual Machines

4. 4
DOCKER ENGINE
HOST OS
SERVER
LEAN
LIGHTWEIGHT
ISOLATED
PORTABLE
EFFICIENT
BINS/LIBS
APP A
BINS/LIBS
APP B
DEFINITIONS
Docker Containers

5. 4
DOCKER ENGINE
HOST OS
SERVER
LEAN
LIGHTWEIGHT
ISOLATED
PORTABLE
EFFICIENT
BINS/LIBS
APP A
BINS/LIBS
APP B
DEFINITIONS
Docker Containers

6. 5
DEFINITIONS
Seen from another angle, the core of
Docker is four distinct things
Clearly defined
interfaces
Central registry of
ready images
Caching mechanism
to re-use steps
A standard format to
package applications

7. 6
DO WE USE IT?
We have embraced Docker on two fronts
For our internal PaaS In our products
NOT PART OF THIS
SESSION

8. @durdn
Our internal PaaS,
called Micros

9. 8
Overall Micros Numbers
Microservices
600+
8
Java
Node.js
Python
Docker containers
40%
Rest is pre-made stacks

10. @durdn
Media Services

11. Our Conversion Stack

12. 6M
11
Media Services Numbers
Microservices
10
11
containers spun per
month
Processed every month
TBs

13. 12
CONCLUSIONS
Docker has been a great fit for our Media Services team
Worked around tools
not easy to
parallelise
Manage resource
control
Isolating data from
different customers
Easily scale
horizontally

14. @durdn
Orchestration is the
next arena

15. What’s Orchestration?
14
Services
YOUR APPLICATION
Orchestration
FRAMEWORKS
Data Center
PHYSICAL INFRA

16. What’s Orchestration?
14
Services
YOUR APPLICATION
Orchestration
FRAMEWORKS
Data Center
PHYSICAL INFRA

17. What’s Orchestration?
14
Services
YOUR APPLICATION
Orchestration
FRAMEWORKS
Data Center
PHYSICAL INFRA

18. @durdn

19. @durdn

20. @durdn

21. 18

22. 19
Docker’s Own Orchestration Tools
Docker machine Docker compose Docker swarm Docker network

23. Where is the DEMO
Lebowski?

24. 21
TOOL NR.1
Docker machine
Simple command line tool to provision local
and remote hosts with Docker installed.
Fantastic to get up and running fast. It has
drivers for many Internet service providers
and PaaS.
Docker machine
$ docker-machine create -d v
INFO[0000] Downloading boot2
INFO[0001] Creating SSH key.
INFO[0001] Creating VirtualB
INFO[0006] Starting VirtualB
INFO[0007] Waiting for VM to
INFO[0041] "dev" has been cr

25. • Provision a machine with
Docker installed and ready
• Pull a minimal image
• Run a few docker commands
• Tear down the machine
Docker machine DEMO
$ docker-machine create -d virtualb
INFO[0000] Downloading boot2docker.
INFO[0001] Creating SSH key...
INFO[0001] Creating VirtualBox VM..
INFO[0006] Starting VirtualBox VM..
INFO[0007] Waiting for VM to start.
INFO[0041] "dev" has been created a

26. • “docker-machine create” to provision the host, locally or remotely
• “docker-machine ls” to list the machines
• “docker-machine stop/rm” to stop and remove
Recap of what you saw
$ docker-machine create -d
INFO[0000] Downloading boo
INFO[0001] Creating SSH ke
INFO[0001] Creating Virtua
INFO[0006] Starting Virtua
INFO[0007] Waiting for VM
INFO[0041] "dev" has been

27. 25
TOOL NR.2
Docker compose
Docker compose
Describe the relation of your components in a
simple YAML file called docker-compose.yml
and docker-compose takes care of starting
them and linking them in order.
1 bitbucket:
2 image: atlassian/bitbucket-server
3 ports:
4 - "7990:7990"
5 - "7999:7999"
6 links:
7 - db
8 volumes_from:
9 - license
10 user: root
11 privileged: true
12 db:
13 image: postgres
14 ports:
15 - "5432:5432"
16 environment:
17 - "POSTGRES_PASSWORD=somepassword"
18 license:
19 build: .

28. • Provision a machine on a PaaS
• Pull PostgreSQL and a Java
app from the Registry
• Use Compose to start the app
• Tear down the machine
Docker compose DEMO
$ docker-compose up -d

29. • “docker-machine create” to provision the host
• Edit “docker-compose.yml” to describe our app
• “docker-compose up -d” to start our application
• “docker-machine rm compose-demo“ to
remove it
Recap of what you saw
$ docker-compose up -d

30. 1 bitbucket:
2 image: atlassian/bitbucket-server
3 ports:
4 - "7990:7990"
5 - "7999:7999"
6 volumes_from:
7 - license
8 user: root
9 privileged: true
10 environment:
11 - "constraint:instance==java"
12 db:
13 image: postgres
14 ports:
15 - "5432:5432"
16 environment:
17 - "POSTGRES_PASSWORD=somepassword"
18 - "constraint:instance==db"
19 license:
20 build: .
29
TOOL NR.3
Docker swarm
Deploy images and run containers on a full
clusters as if you’re handling a single machine
Docker swarm

31. @durdn
Docker swarm
swarm master
swarm node swarm node swarm node
container
container
container
container
container
container
discovery service
High level architecture
scheduler

32. • Strategies
• Spread
• Binpack
• Random
• Filters
• Constraint
• Affinity
• Port
• Dependency
• Health
Swarm comes with strategies and filters
$ docker run -e
constraint:instance==database --name db

33. 32
HELPER TOOL
Discovery Service
For our Swarm to know which nodes are
added to the infrastructure and store
information about them we need to use a key-
value discovery service, like Consul.
Consul from HashiCorp

34. 33
TOOL NR.4
Docker network
New Docker command to manage advanced
and transparent networking, like creating
VXLAN-based overlay networks that span
across data centers.
Docker network
$ docker network create
--driver overlay mynet

35. • Provision a Docker swarm
• Made up of three hosts
• Master node
• Node with 2gb of RAM
• simple Node
• Use labels to deploy to nodes
• Run Java app and PostgreSQL
on different nodes
The plan for the Swarm DEMO
$ docker pull swarm
$ docker run --rm swarm create
6856663cdefdec325839a4b7e1de38e8

36. @durdn
After Part 1
demo-master
node1 node2
label: java
Consul:
discovery service
Current Architecture
scheduler
RAM: 2GB
label: database
RAM: 512MB

37. 37
Multi-host Docker compose1 bitbucket:
2 image: atlassian/bitbucket-server
3 ports:
4 - "7990:7990"
5 - "7999:7999"
6 volumes_from:
7 - license
8 user: root
9 privileged: true
10 environment:
11 - "constraint:instance==java"
12 db:
13 image: postgres
14 ports:
15 - "5432:5432"
16 environment:
17 - "POSTGRES_PASSWORD=somepassword"
18 - "constraint:instance==db"
19 license:
20 build: .
docker-compose.yml

38. @durdn
What we did
demo-master
node1 node2
label: java
Final Architecture
scheduler
RAM: 2GB
label: database
RAM: 512MB
PostgreSQLJava App
Consul:
discovery service

39. • We created a 3-node cluster with
“docker-machine”
• We tagged the nodes with labels
• We started our components using
label constraints and not IP
addresses
Recap of Swarm DEMO

40. I hope you are hyped as I am
for all this coolness, come
talk to me afterwards!

41. @durdn#VoxxedBerlin
Thank you!
Stay in contact on Twitter
@durdn
j.mp/cluster-proxy