The document outlines updates to Docker, focusing on versioning and new features across versions 17.03 to 17.05, including improvements in multi-stage builds and runtime commands. Significant enhancements include the introduction of a new plugin system, swarm mode improvements like synchronous service commands, and advancements in Docker Compose configurations. The release also emphasizes ease of deployment and management using Docker Stack while providing insights into new subcommands and features aimed at improving user experience.

1. What’s new in Docker
Victor Vieux
Software Engineer,
Docker
@vieux

2. 1. Versioning
2. Builder
3. Runtime
4. Swarm mode
5. Compose
Agenda

3. … -> 1.11 -> 1.12 -> 1.13 -> 17.03-ce -> 17.04-ce -> 17.05-ce -> …
YY.MM
“ce” stands for Community Edition as opposed to
“ee” for Enterprise Edition
New versioning…

4. …and new release schedule
Docker CE
Docker EE
Monthly
Quarterly
Supported for
4 months
Quarterly
Supported for
12 months

5. All features presented here are available in 17.05-rc1
Available today!
17.XX
…and new release schedule

6. Builder

7. Multi-Stage builds
step 1
step 2
step 3
step 4
step 1
step 2
step 3
step 4
step 5
step 6
step 7
docker build & Dockerfile improvement
17.05

8. FROM ubuntu
RUN apt-get install make g++
ADD . /src
RUN cd /src && make
EXPOSE 80
ENTRYPOINT /usr/local/bin/app
Multi-Stage builds
docker build & Dockerfile improvement
17.05

9. FROM alpine
RUN apk add make g++
ADD . /src
RUN cd /src && make
EXPOSE 80
ENTRYPOINT /usr/local/bin/app
Multi-Stage builds
docker build & Dockerfile improvement
17.05

10. FROM alpine
RUN apk add make g++
ADD . /src
RUN cd /src && make
Multi-Stage builds
docker build & Dockerfile improvement
FROM busybox
ADD ./app /usr/local/bin
EXPOSE 80
ENTRYPOINT /usr/local/bin/app
Makefile and/or shell script
17.05

11. FROM alpine AS build-env
RUN apk add make g++
ADD . /src
RUN cd /src && make
FROM busybox
COPY --from=build-env /src/build/app /usr/local/bin/app
EXPOSE 80
ENTRYPOINT /usr/local/bin/app
Multi-Stage builds
docker build & Dockerfile improvement
17.05

12. Multi-Stage builds
docker build & Dockerfile improvement
Let’s see a more complicated example:
Current Dockerfile: https://github.com/docker/dockercraft
Proposed Changes: https://github.com/docker/dockercraft/pull/83
17.05

13. Multi-Stage builds
wget docker
wget cuberite
go build dockercraft
run dockercraft
docker build & Dockerfile improvement
install wget
17.05

14. Multi-Stage builds
wget docker
wget cuberite
go build dockercraft
run dockercraft
install wget
wget
docker
docker build & Dockerfile improvement
wget
cuberite
run dockercraft
go build
dockercraft
install wget
17.05

15. Multi-Stage builds
docker build & Dockerfile improvement
838MB 155MB
final image size: final image size:
*
* 80% comes from debian:jessie, required by cuberite
17.05

16. • docker build .
• docker build --target=cuberite .
• docker build --target=docker .
Specify target on build
docker build & Dockerfile improvement
17.05

17. • docker build .
• docker build --build-arg GO_VERSION=latest .
• docker build --build-arg GO_VERSION=1.7 .
ARG in FROM
docker build & Dockerfile improvement
ARG GO_VERSION=1.8
FROM golang:${GO_VERSION}
ADD . /src
WORKDIR /src
RUN go build
CMD [“/bin/app”]
17.05

18. Runtime

19. docker system subcommands added
• docker system df
• docker system prune
• docker container/image/network/volume prune
Data management commands
$ docker system df
TYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 5 1 2.777 GB 2.647 GB (95%)
Containers 1 1 0 B 0B
Local Volumes 4 1 3.207 GB 2.261 GB (70%)
17.03

20. docker plugin subcommands added
Plugins are now managed by the docker daemon and run as containers
• docker plugin install <plugin>
• docker plugin enable/disable <plugin>
• docker plugin set <plugin> KEY=value
New plugin system
17.03

21. docker plugin subcommands added
New plugin system
EXAMPLE:
https://github.com/vieux/docker-volume-sshfs
17.03

22. Plug-ins: Building, Shipping, Storing and Running
by Nandhini Santhanam & Tibor Vass
Tomorrow at 1:30pm in Ballroom D
Deep dive session

23. Swarm mode

24. Synchronous service commands
swarm mode improvements
$ docker service create --detach=false --name redis --replicas 5 redis
overall: [====================> ] 2B/5B
1/5: starting [========================================> ] 8B/9B
2/5: starting [========================================> ] 8B/9B
3/5: starting [========================================> ] 8B/9B
4/5: running [=============================================>] 9B/9B
5/5: running [=============================================>] 9B/9B
$
17.05

25. DEMO
using http://play-with-docker.com
Thanks to @marcosnils and @xetorthio
Synchronous service commands
swarm mode improvements
17.05

26. “rollback” action added to --update-failure-action
(in addition to “pause” and “continue”)
with all the associated flags
--rollback-delay
--rollback-failure-action
--rollback-max-failure-ratio
--rollback-monitor
--rollback-parallelism
Service rollback on failure
swarm mode improvements
17.04

27. rack: SFO-2rack: SFO-1
Topology-aware scheduling
node1 node2 node3
swarm mode improvements
17.04

28. rack: SFO-2rack: SFO-1
Topology-aware scheduling
node1 node2 node3
docker service create --replicas=6 postgres
swarm mode improvements
17.04

29. docker service create --replicas=6 postgres
rack: SFO-2rack: SFO-1
Topology-aware scheduling
node1 node2 node3
swarm mode improvements
17.04

30. docker service create --replicas=6 postgres
docker service create --replicas=2 webapp
rack: SFO-2rack: SFO-1
Topology-aware scheduling
node1 node2 node3
swarm mode improvements
17.04

31. docker service create --replicas=6 postgres
docker service create --replicas=2 webapp
rack: SFO-2rack: SFO-1
Topology-aware scheduling
node1 node2 node3
swarm mode improvements
17.04

32. rack: SFO-2rack: SFO-1
Topology-aware scheduling
node1 node2 node3
swarm mode improvements
17.04

33. rack: SFO-2rack: SFO-1
Topology-aware scheduling
node1 node2 node3
docker service create --replicas=6 --placement-pref-add=rack postgres
swarm mode improvements
17.04

34. docker service create --replicas=6 --placement-pref-add=rack postgres
rack: SFO-2rack: SFO-1
swarm mode improvements
Topology-aware scheduling
node1 node2 node3
17.04

35. docker service create --replicas=6 --placement-pref-add=rack postgres
docker service create --replicas=2 --placement-pref-add=rack webapp
rack: SFO-2rack: SFO-1
swarm mode improvements
Topology-aware scheduling
node1 node2 node3
17.04

36. rack: SFO-2rack: SFO-1
swarm mode improvements
Topology-aware scheduling
node1 node2 node3
docker service create --replicas=6 --placement-pref-add=rack postgres
docker service create --replicas=2 --placement-pref-add=rack webapp
17.04

37. Service logs
swarm mode improvements
$ docker service create --replicas 2 --name redis redis
$ docker service logs redis
redis.2.najk8sq1klac@node2 | _.-``__ ''-._
redis.2.najk8sq1klac@node2 | _.-`` `. `_. ''-._ Redis 3.2.8 (00000000/0) 64 bit
redis.1.lfkijq3fx3q8@node1 | _.-``__ ''-._
redis.2.najk8sq1klac@node2 | .-`` .-```. ```/ _.,_ ''-._
redis.1.lfkijq3fx3q8@node1 | _.-`` `. `_. ''-._ Redis 3.2.8 (00000000/0) 64 bit
redis.2.najk8sq1klac@node2 | ( ' , .-` | `, ) Running in standalone mode
redis.1.lfkijq3fx3q8@node1 | .-`` .-```. ```/ _.,_ ''-._
redis.2.najk8sq1klac@node2 | |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
redis.1.lfkijq3fx3q8@node1 | ( ' , .-` | `, ) Running in standalone mode
redis.2.najk8sq1klac@node2 | | `-._ `._ / _.-' | PID: 1
redis.1.lfkijq3fx3q8@node1 | |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
redis.2.najk8sq1klac@node2 | `-._ `-._ `-./ _.-' _.-'
redis.1.lfkijq3fx3q8@node1 | | `-._ `._ / _.-' | PID: 1
...
17.05

38. Under the Hood with Docker Swarm Mode
by Drew Erny & Nishant Totla
Today at 2:00pm in Ballroom D
Deep dive session

39. Compose

40. docker stack subcommands added
It is now possible to deploy services using compose files directly from docker
• docker stack deploy --compose-file docker-compose.yml <my_stack>
• docker stack list
• docker stack rm <my_stack>
Compose to Swarm
17.03

41. docker-compose.yml improvements
Main differences form v2 are:
• Removed the non-portable options
• build
• volume-from
• …
• Added Swarm specific options
• replicas
• mode
• …
Compose Format version 3
17.03

42. DEMO
docker-compose.yml improvements
Compose Format version 3
https://github.com/docker/example-voting-app/blob/master/docker-stack.yml
17.03

43. ports:
- 3000
- 3000-3005
- 49100:22
- 9090-9091:8080-8081
- 127.0.0.1:8001:8001
- 127.0.0.1:5005-5010:5005-5010
- 6060:7060/udp
Long syntax for ports
docker-compose.yml improvements
17.04

44. ports:
- target: 6060
published: 7060
protocol: udp
Long syntax for ports
docker-compose.yml improvements
17.04
Also added specific swarm mode options

45. volumes:
- /var/lib/mysql
- /opt/data:/var/lib/mysql
- ./cache:/tmp/cache
- datavolume:/var/lib/mysql
- ~/configs:/etc/configs/:ro
Long syntax for volumes
docker-compose.yml improvements
17.04

46. volumes:
- type: bind
source: ~/configs
target: /etc/configs
read_only: true
Long syntax for volumes
docker-compose.yml improvements
17.04
Also added specific swarm mode options

47. Thanks, Don’t forget to vote!
@vieux #dockercon
Questions?