Why do I get "unzip: short read" when I try to build an image from Dockerfile?
From Spring Microservices in Action book: I am trying to use the Docker Maven Plugin to build a docker image for deploy a Java microservice as Docker container to the cloud.
Dockerfile:
FROM openjdk:8-jdk-alpine
RUN mkdir -p /usr/local/configserver
ADD jce_policy-8.zip /tmp/
RUN unzip /tmp/jce_policy-8.zip && \
rm /tmp/jce_policy-8.zip && \
yes | cp -v /tmp/UnlimitedJCEPolicyJDK8/*.jar /usr/lib/jvm/java-1.8-openjdk/jre/lib/security/
ADD @[email protected] /usr/local/configserver/
ADD run.sh run.sh
RUN chmod +x run.sh
CMD ./run.sh
Output related to step 4 in Dockerfile:
... ---> Using cache ---> dd33d4c12d29 Step 4/8 : RUN unzip /tmp/jce_policy-8.zip && rm /tmp/jce_policy-8.zip && yes | cp -v /tmp/UnlimitedJCEPolicyJDK8/*.jar /usr/lib/jvm/java-1.8-openjdk/jre/lib/security/ ---> Running in 1071273ceee5 Archive: /tmp/jce_policy-8.zip unzip: short read
Why do I get unzip: short read when I try to build the image?
Answer
Somehow, curl on alpine linux distro can't set cookie headers correctly while downloading jce zip file. It seems it downloads a zip file but in fact it is an html error page. If you view the file you can see that it is an html file. I've used wget instead of curl and it successfully downloaded file. Then unzip operation worked as expected.
FROM openjdk:8-jdk-alpine
RUN apk update && apk upgrade && apk add netcat-openbsd
RUN mkdir -p /usr/local/configserver
RUN cd /tmp/ && \
wget 'http://download.oracle.com/otn-pub/java/jce/8/jce_policy-8.zip' --header "Cookie: oraclelicense=accept-securebackup-cookie" && \
unzip jce_policy-8.zip && \
rm jce_policy-8.zip && \
yes |cp -v /tmp/UnlimitedJCEPolicyJDK8/*.jar /usr/lib/jvm/java-1.8-openjdk/jre/lib/security/
ADD @[email protected] /usr/local/configserver/
ADD run.sh run.sh
RUN chmod +x run.sh
CMD ./run.sh