Slides from my talk at the "Real-world Docker" meetup in Stockholm on April 16, 2105 A short introduction on how to create a virtual network with Weave to connectc Docker containers deployed across multiple hosts. Meetup: http://www.meetup.com/Docker-Stockholm/events/221388240/ Recording: https://youtu.be/1_OxkPZ5k7I

2. Background
● Zettio releases Weave in November 2014
● Docker acquires SocketPlane in March 2015
● Built in multi-host networking soonish
“Batteries included but removable”

3. Source: Weaveworks

4. Installing Weave
wget -O /usr/local/bin/weave
https://github.com/weaveworks/weave/releases/download/latest_release/weave
chmod a+x /usr/local/bin/weave

5. Starting up the routers
weave launch <IP>
First router
weave launch
Subsequent routers
weave launch <IP>
...

6. Go!
weave run 10.0.0.1/24 -ti debian # on host 1
weave run 10.0.0.2/24 -ti debian # on host 2
...
docker run -dti debian
weave attach 10.0.0.3/24 <container-name>
...
Or

7. Source: Weaveworks

8. Service Binding & Routing
weave expose 10.0.0.99/24
iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 2211
-j DNAT --to-destination <container>:<port>
Then

9. Big Picture
Source: https://coreos.com/blog/cluster-osi-model/

10. Go!
weave launch-dns
On each host
Or
weave run --with-dns 10.0.0.3/24 -h trillian.weave.local -ti debian
...
Or use anything else. No lock-in...

11. Future
● As Docker extension → no more wrapper
● Performance improvements / HW acceleration
● Weave ← → Socketplane?