CODEWITHSUNDEEP
javadockerjarenvironment-variables
Alexander Rumanovsk
Alexander Rumanovsk

Reputation: 2313

Docker environment variable with spaces

I need to run a docker image where I pass a bunch of jvm configurations to a jar file. I'm passing the configs via -e parameters as the example bellow.

Dockerfile:

FROM openjdk:9-jre

COPY test.jar /

CMD java -jar -DinstallationDate=$INSTALLATION_DATE /test.jar

Run command:

docker run -e INSTALLATION_DATE="03.05.10.2019 15:00:00" space

The problem is that when I run this, it gives me the following error:

Error: Unable to access jarfile 15:00:00

I tried running it with the json notation, like:

docker run -e ["INSTALLATION_DATE","03.05.10.2019 15:00:00"] space

It doesn't give me an error, but the parameter comes as an empty string. I also tried to escape the space char with "\", but still didn't work.

Anyone knows how can I send this parameter to the jar execution inside the docker container? Is there another approach to this?

Upvotes: 2

Views: 6775

Answers (1)

ctt
ctt

Reputation: 1435

The problem is likely occurring because the CMD in your Dockerfile:

CMD java -jar -DinstallationDate=$INSTALLATION_DATE /test.jar

...is subject to word splitting after the variable $INSTALLATION_DATE is expanded. In order to turn off word splitting for that second argument to java, consider enclosing the variable in double quotes:

CMD java -jar -DinstallationDate="$INSTALLATION_DATE" /test.jar

Upvotes: 4

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