JVM libzip.so file lost

[tao12345666333]

Thanks for this tool.

When I want to try docker-slim, I have a problem, I want to confirm if there is a problem with my usage, or is this a bug.

My Dockerfile is here

FROM maven:3.6.1-jdk-8-alpine AS builder

WORKDIR /app

COPY pom.xml /app/
RUN mvn dependency:go-offline
COPY src /app/src
RUN mvn -e -B package

FROM builder AS dev

RUN apk add --no-cache vim

FROM openjdk:8-jre-alpine

COPY --from=builder /app/target/gs-spring-boot-0.1.0.jar /

CMD [ "java", "-jar", "/gs-spring-boot-0.1.0.jar" ]

you can find it on https://github.com/tao12345666333/spring-boot-hello-world/blob/master/Dockerfile

(MoeLove) ➜  ~ sudo docker-slim  build  --http-probe local/spring-boot:1
[sudo] tao 的密码：
docker-slim[build]: state=started   
docker-slim[build]: info=params target=local/spring-boot:1 continue.mode=enter
docker-slim[build]: state=inspecting.image
docker-slim[build]: info=image id=sha256:01e4898d1141763400d39111609425ba6232b8bf42f46a6033fdb2b7306dc75b size.bytes=103166686 size.human=103 MB
docker-slim[build]: info=image.layers index=0 name='local/spring-boot' tags='1'                 
docker-slim[build]: state=inspecting.container                                                                                                                                                                      
docker-slim[build]: info=container status=created id=32b94537fe4fb4b68b0278384f7857d2a2a87b1bbf76dfb63dd3c98ac047ea58
docker-slim[build]: info=cmd.startmonitor status=sent                         
docker-slim[build]: info=event.startmonitor.done status=received     
docker-slim[build]: info=container name=dockerslimk_17626_20190530031807 id=32b94537fe4fb4b68b0278384f7857d2a2a87b1bbf76dfb63dd3c98ac047ea58 target.port.list=[] target.port.info=[]
docker-slim[build]: info=prompt message='press <enter> when you are done using the container'
                              
docker-slim[build]: state=processing
docker-slim[build]: state=building message='building minified image'
docker-slim[build]: state=completed       
docker-slim[build]: info=results status='MINIFIED BY 3.48X [103166686 (103 MB) => 29652590 (30 MB)]'
docker-slim[build]: info=results  image.name=local/spring-boot.slim image.size='30 MB' data=true
docker-slim[build]: info=results  artifacts.location='/usr/local/bin/.docker-slim-state/images/01e4898d1141763400d39111609425ba6232b8bf42f46a6033fdb2b7306dc75b/artifacts'
docker-slim[build]: info=results  artifacts.report=creport.json
docker-slim[build]: info=results  artifacts.dockerfile.original=Dockerfile.fat
docker-slim[build]: info=results  artifacts.dockerfile.new=Dockerfile
docker-slim[build]: info=results  artifacts.seccomp=local-spring-boot-seccomp.json
docker-slim[build]: info=results  artifacts.apparmor=local-spring-boot-apparmor-profile
docker-slim[build]: state=done
(MoeLove) ➜  ~ docker run --rm local/spring-boot.slim
Error occurred during initialization of VM
Unable to load ZIP library: /usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/libzip.so
(MoeLove) ➜  ~ docker tag local/spring-boot:1 taobeier/spring-boot-hello-world:1
(MoeLove) ➜  ~ docker push taobeier/spring-boot-hello-world:1

the docker image I have beed pushed to DockerHub taobeier/spring-boot-hello-world:1

[kcq]

Thank you for providing the reference project! It'll be much easier to repro!

I noticed you don't have an EXPOSE instruction in your Dockerfile. I assume you use the -p parameter in your docker run command mapping 8080 to a host port...

[tao12345666333]

I noticed you don't have an EXPOSE instruction in your Dockerfile. I assume you use the -p parameter in your docker run command mapping 8080 to a host port...

So the following error message

(MoeLove) ➜ ~ docker run --rm local/spring-boot.slim
Error occurred during initialization of VM
Unable to load ZIP library: /usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/libzip.so

Is it due to the absence of the expose port?

[tao12345666333]

After I added expose, the problem still exists.

(MoeLove) ➜  spring-boot-hello-world git:(master) ✗ sudo docker-slim  build  --http-probe local/spring-boot:6
[sudo] tao 的密码：
docker-slim[build]: state=started
docker-slim[build]: info=params target=local/spring-boot:6 continue.mode=enter
docker-slim[build]: state=inspecting.image
docker-slim[build]: info=image id=sha256:8e5ccc8213f5fc3a3134dba8547b6dd543e7ae1ebad55084c334322efa919b15 size.bytes=103166686 size.human=103 MB
docker-slim[build]: info=image.layers index=0 name='local/spring-boot' tags='6'
docker-slim[build]: info=image.exposed_ports list='map[8080/tcp:{}]'
docker-slim[build]: state=inspecting.container
docker-slim[build]: info=container status=created id=8be77d9ce1a969255f7c4280e988235cae9f7dfe70a0c8e3d46f4e4c40f6afa8
docker-slim[build]: info=cmd.startmonitor status=sent
docker-slim[build]: info=event.startmonitor.done status=received
docker-slim[build]: info=container name=dockerslimk_5779_20190531054415 id=8be77d9ce1a969255f7c4280e988235cae9f7dfe70a0c8e3d46f4e4c40f6afa8 target.port.list=[32770] target.port.info=[8080/tcp => 0.0.0.0:32770]
docker-slim[build]: info=prompt message='press <enter> when you are done using the container'


docker-slim[build]: state=http.probe.starting
docker-slim[build]: info=http.probe.call status=error method=GET target=http://127.0.0.1:32770/ attempt=1 error='Get http://127.0.0.1:32770/: dial tcp 127.0.0.1:32770: connect: connection refused' time=2019-05-31T05:44:27Z
docker-slim[build]: state=processing
docker-slim[build]: state=building message='building minified image'
docker-slim[build]: info=http.probe.call status=error method=GET target=http://127.0.0.1:32770/ attempt=2 error='Get http://127.0.0.1:32770/: dial tcp 127.0.0.1:32770: connect: connection refused' time=2019-05-31T05:44:35Z
docker-slim[build]: state=completed
docker-slim[build]: info=results status='MINIFIED BY 3.48X [103166686 (103 MB) => 29652590 (30 MB)]'
docker-slim[build]: info=results  image.name=local/spring-boot.slim image.size='30 MB' data=true
docker-slim[build]: info=results  artifacts.location='/usr/local/bin/.docker-slim-state/images/8e5ccc8213f5fc3a3134dba8547b6dd543e7ae1ebad55084c334322efa919b15/artifacts'
docker-slim[build]: info=results  artifacts.report=creport.json
docker-slim[build]: info=results  artifacts.dockerfile.original=Dockerfile.fat
docker-slim[build]: info=results  artifacts.dockerfile.new=Dockerfile
docker-slim[build]: info=results  artifacts.seccomp=local-spring-boot-seccomp.json
docker-slim[build]: info=results  artifacts.apparmor=local-spring-boot-apparmor-profile
docker-slim[build]: state=done
(MoeLove) ➜  spring-boot-hello-world git:(master) ✗ 
(MoeLove) ➜  spring-boot-hello-world git:(master) ✗ docker image ls local/spring-boot.slim
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
local/spring-boot.slim   latest              92cc0239d51e        21 seconds ago      29.7MB
(MoeLove) ➜  spring-boot-hello-world git:(master) ✗ docker run -p 8080:8080 --rm local/spring-boot.slim 
Error occurred during initialization of VM
Unable to load ZIP library: /usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/libzip.so

I think it is missing the file libzip.so when compressing the image.

[kcq]

Thank you for the additional info! I have managed to repro the condition. It looks like it's OpenJDK and Alpine related.

I almost managed to make it work by including a few extra files minifying the image (using the --include-path parameter). Here's what my docker-slim build command looks like: docker-slim build --http-probe --include-path=/usr/lib/jvm/java-1.8-openjdk/jre/lib/currency.data --include-path=/usr/lib/jvm/java-1.8-openjdk/jre/lib/tzdb.dat --include-path=/usr/lib/jvm/java-1.8-openjdk/jre/lib/rt.jar --include-path=/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/libzip.so my/java-spring-boot-hello-world. You can try it yourself if you are curious... Just replace my/java-spring-boot-hello-world with your image name. This minified container prints the Spring/Spring Boot logo failing trying the load the net library: java.lang.UnsatisfiedLinkError: no net in java.library.path.