What's new in Docker ?

It’s the first breakout after the keynote and you need to know more about all the latest and greatest Docker announcements. We've got you covered! In this session, Victor Vieux will go deeper, looking into what's new with Docker, demoing the latest features and answering your questions.

Transcript

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

   Docker
   @vieux
   

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

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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…
   

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

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

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6. Builder
   

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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
   

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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
   

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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
   

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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
    

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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
    

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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
    

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

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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
    

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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
    

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

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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
    

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18. Runtime
    

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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
    

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

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

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

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23. Swarm mode
    

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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
    

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

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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
    

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

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

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

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

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

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

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

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

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

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36. rack: SFO-2
    rack: 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
    

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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
    

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

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39. Compose
    

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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
    • docker stack list
    • docker stack rm
    Compose to Swarm 17.03
    

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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
    

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

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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
    

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

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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
    

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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
    

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

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