BuildKit, which was experimental in 18.06 and generally available in 18.09, has this functionality built in. To configure the dockerd daemon with experimental mode, you can setup the daemon.json:
$ cat /etc/docker/daemon.json
{
"experimental": true
}
Then you can enable BuildKit from the client side with an environment variable:
$ export DOCKER_BUILDKIT=1
$ docker build -t java-test:latest .
[+] Building 421.6s (13/13) FINISHED
=> local://context (.dockerignore) 1.6s
=> => transferring context: 56B 0.3s
=> local://dockerfile (Dockerfile) 2.0s
=> => transferring dockerfile: 895B 0.4s
=> CACHED docker-image://docker.io/tonistiigi/copy:v0.1.3@sha256:e57a3b4d6240f55bac26b655d2cfb751f8b9412d6f 0.1s
=> docker-image://docker.io/library/openjdk:8-jdk-alpine 1.0s
=> => resolve docker.io/library/openjdk:8-jdk-alpine 0.0s
=> local://context 1.7s
=> => transferring context: 6.20kB 0.4s
=> docker-image://docker.io/library/openjdk:8-jre-alpine 1.3s
=> => resolve docker.io/library/openjdk:8-jre-alpine 0.0s
=> /bin/sh -c apk add --no-cache maven 61.0s
=> copy /src-0/pom.xml java/pom.xml 1.3s
=> /bin/sh -c mvn dependency:go-offline 339.4s
=> copy /src-0 java 0.9s
=> /bin/sh -c mvn package -Dmaven.test.skip=true 10.2s
=> copy /src-0/gs-spring-boot-docker-0.1.0.jar java/app.jar 0.8s
=> exporting to image 1.2s
=> => exporting layers 1.0s
=> => writing image sha256:d57028743ca10bb4d0527a294d5c83dd941aeb1033d4fe08949a135677846179 0.1s
=> => naming to docker.io/library/java-test:latest 0.1s
There’s also an option to disable the tty console output which generates output more suitable for scripting with each section having a start, stop, and duration:
$ docker build -t java-test:latest --progress plain .
#1 local://dockerfile (Dockerfile)
#1 digest: sha256:da721b637ea85add6e26070a48520675cefc2bed947c626f392be9890236d11b
#1 name: "local://dockerfile (Dockerfile)"
#1 started: 2018-09-05 19:30:53.899809093 +0000 UTC
#1 completed: 2018-09-05 19:30:53.899903348 +0000 UTC
#1 duration: 94.255µs
#1 started: 2018-09-05 19:30:53.900069076 +0000 UTC
#1 transferring dockerfile: 38B done
#2 ...
#2 local://context (.dockerignore)
#2 digest: sha256:cbf55954659905f4d7bd2fc3e5e52d566055eecd94fd7503565315022d834c21
#2 name: "local://context (.dockerignore)"
#2 started: 2018-09-05 19:30:53.899624016 +0000 UTC
#2 completed: 2018-09-05 19:30:53.899695455 +0000 UTC
#2 duration: 71.439µs
#2 started: 2018-09-05 19:30:53.899839335 +0000 UTC
#2 completed: 2018-09-05 19:30:54.359527504 +0000 UTC
#2 duration: 459.688169ms
#2 transferring context: 34B done
#1 local://dockerfile (Dockerfile)
#1 completed: 2018-09-05 19:30:54.592304408 +0000 UTC
#1 duration: 692.235332ms
#3 docker-image://docker.io/tonistiigi/copy:v0.1.3@sha256:e57a3b4d6240f55ba...
#3 digest: sha256:39386c91e9f27ee70b2eefdee12fc8a029bf5edac621b91eb5f3e6001d41dd4f
#3 name: "docker-image://docker.io/tonistiigi/copy:v0.1.3@sha256:e57a3b4d6240f55bac26b655d2cfb751f8b9412d6f7bb1f787e946391fb4b21b"
#3 started: 2018-09-05 19:30:54.731749377 +0000 UTC
#3 completed: 2018-09-05 19:30:54.732013326 +0000 UTC
#3 duration: 263.949µs
#5 docker-image://docker.io/library/openjdk:8-jdk-alpine
#5 digest: sha256:d680c6a82813d080081fbc3c024d21ddfa7ff995981cc7b4bfafe55edf80a319
#5 name: "docker-image://docker.io/library/openjdk:8-jdk-alpine"
#5 started: 2018-09-05 19:30:54.731483638 +0000 UTC
#5 completed: 2018-09-05 19:30:54.732480345 +0000 UTC
#5 duration: 996.707µs
#4 docker-image://docker.io/library/openjdk:8-jre-alpine
#4 digest: sha256:9ed31df4e6731a1718ea93bfa77354ad1ea2d1625c1cb16e2087d16d0b84bd00
#4 name: "docker-image://docker.io/library/openjdk:8-jre-alpine"
#4 started: 2018-09-05 19:30:54.73176516 +0000 UTC
#4 completed: 2018-09-05 19:30:54.732603067 +0000 UTC
#4 duration: 837.907µs
#7 local://context
#7 digest: sha256:efe765161a29e2bf7a41439cd2e6656fcf6fa6bc97da825ac9b5a0d8adecf1ac
#7 name: "local://context"
#7 started: 2018-09-05 19:30:54.73178732 +0000 UTC
#7 completed: 2018-09-05 19:30:54.731880943 +0000 UTC
#7 duration: 93.623µs
#7 started: 2018-09-05 19:30:54.792740019 +0000 UTC
#7 transferring context: 473B done
#7 completed: 2018-09-05 19:30:55.059008345 +0000 UTC
#7 duration: 266.268326ms
#9 /bin/sh -c mvn dependency:go-offline
#9 digest: sha256:2197672cd7a44d93e0dba40aa00d7ef41f8680226d91f469d1c925646bdc8d6d
#9 name: "/bin/sh -c mvn dependency:go-offline"
#9 started: 2018-09-05 19:30:55.203449147 +0000 UTC
#9 completed: 2018-09-05 19:30:55.203449147 +0000 UTC
#9 duration: 0s
#9 cached: true
#10 copy /src-0 java
#10 digest: sha256:36cf252c34be098731bd8c5fb3f273f9c1437a5f74a65a3555d71150c2092fa7
#10 name: "copy /src-0 java"
#10 started: 2018-09-05 19:30:55.203449147 +0000 UTC
#10 completed: 2018-09-05 19:30:55.203449147 +0000 UTC
#10 duration: 0s
#10 cached: true
#11 /bin/sh -c mvn package -Dmaven.test.skip=true
#11 digest: sha256:390464b1fdc7a4c833b3476033d95b7714e22bcbfd018469e97b04781cb41532
#11 name: "/bin/sh -c mvn package -Dmaven.test.skip=true"
#11 started: 2018-09-05 19:30:55.203449147 +0000 UTC
#11 completed: 2018-09-05 19:30:55.203449147 +0000 UTC
#11 duration: 0s
#11 cached: true
#12 copy /src-0/gs-spring-boot-docker-0.1.0.jar java/app.jar
#12 digest: sha256:a7d60191a720f80de72a77ebe0d4bd1b0fd55d44e623661e80916b7fd1952076
#12 name: "copy /src-0/gs-spring-boot-docker-0.1.0.jar java/app.jar"
#12 started: 2018-09-05 19:30:55.203449147 +0000 UTC
#12 completed: 2018-09-05 19:30:55.203555216 +0000 UTC
#12 duration: 106.069µs
#12 cached: true
#6 /bin/sh -c apk add --no-cache maven
#6 digest: sha256:db505db5e418f195c7bad3a710ad40bec3d91d47ff11a6f464b3ae37af744e7d
#6 name: "/bin/sh -c apk add --no-cache maven"
#6 started: 2018-09-05 19:30:55.203449147 +0000 UTC
#6 completed: 2018-09-05 19:30:55.203449147 +0000 UTC
#6 duration: 0s
#6 cached: true
#8 copy /src-0/pom.xml java/pom.xml
#8 digest: sha256:f032d4ff111c6ab0efef1a4e37d2467fffe43f48a529b8d56291ec81f96296ab
#8 name: "copy /src-0/pom.xml java/pom.xml"
#8 started: 2018-09-05 19:30:55.203449147 +0000 UTC
#8 completed: 2018-09-05 19:30:55.203449147 +0000 UTC
#8 duration: 0s
#8 cached: true
#13 exporting to image
#13 digest: sha256:d536dc2895c30fbde898bb4635581350a87c21f3695913ba21850a73d31422d9
#13 name: "exporting to image"
#13 started: 2018-09-05 19:30:55.203674127 +0000 UTC
#13 exporting layers done
#13 writing image sha256:d57028743ca10bb4d0527a294d5c83dd941aeb1033d4fe08949a135677846179 0.1s done
#13 naming to docker.io/library/java-test:latest
#13 completed: 2018-09-05 19:30:55.341300051 +0000 UTC
#13 duration: 137.625924ms
#13 naming to docker.io/library/java-test:latest 0.0s done