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I need hello.rpm when I build from Dockerfile, but this rpm file is not available online.
Right now I'm serving the file by firing up a temporary web server, but ideally I'd like to run a build command which makes this local file available inside the container.
Is this possible?
My build command:
docker build -t fredrik/helloworld:1.0 . My Dockerfile:
FROM centos:6 RUN rpm -ivh hello.rpm 
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They get stored as a series of layers in your Docker root directory. On Linux, it's /var/lib/docker .
The best way to work around this is to specify the Dockerfile independently of the build context, using -f. For instance, this command will give the ADD command access to anything in your current directory. docker build -f docker-files/Dockerfile . docker build -f ../Dockerfile .
If you use the default storage driver overlay2, then your Docker images are stored in /var/lib/docker/overlay2 . There, you can find different files that represent read-only layers of a Docker image and a layer on top of it that contains your changes.
Why don't you COPY the file inside the container before executing RUN?
FROM centos:6 COPY hello.rpm /tmp/hello.rpm RUN rpm -ivh /tmp/hello.rpm This assumes that hello.rpm is next to your Dockerfile when you build it.
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Otherwise if an internet connection is not a limiting factor while you're working just:
wget https://www.cloudnameXYZ.com/filename
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