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

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

… -> 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… 

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

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

Builder 

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 

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 

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 

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 

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 

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 

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

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 

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 

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

• 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 

Runtime 

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 

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 

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

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

Swarm mode 

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 

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

“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 

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

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

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

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 

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 

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

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 

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 

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 

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 

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 

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

Compose 

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 

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 

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

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 

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

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 

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 

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