CODEWITHSUNDEEP
node.jsdockerdockerfile
Christian Grabowski
Christian Grabowski

Reputation: 2892

docker's VOLUME isn't mounting host files

I have this docker file:

FROM node:0.10.38
VOLUME /opt/build
WORKDIR /opt/build
EXPOSE 8080
CMD node app.js

However, when I got to run the container, I get the error that app.js does not exist, specifically /opt/build/app.js does not exist. I've also tried ADD and COPY to do this, both say it can't find anything, and I'd like to use VOLUME so it writes to the host's log that is also in /opt/build. All desired files are in fact on the host as well. By the way, I'm using coreos as the host OS.

Upvotes: 0

Views: 867

Answers (1)

Charles Duffy
Charles Duffy

Reputation: 295884

As documented in http://docs.docker.com/userguide/dockervolumes/#volume --

The VOLUME Dockerfile command is equivalent to -v /opt/build ("Adding a data volume"), not equivalent to -v /opt/build:/opt/build ("Mount a Host Directory as a Data Volume"); the latter is what you want here.

Upvotes: 1

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