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We have a dockerfile as
FROM bitnami/tomcat
EXPOSE 8080
EXPOSE 8009
ADD values.war /opt/bitnami/tomcat/data/
Except the values.war file never seems to be added, when we
docker exec -it values /bin/bash
And check the /opt/bitnami/tomcat/data/ directory the war file is not copied.
However we tried the following and when we connected into the docker container the file was copied
FROM bitnami/tomcat
EXPOSE 8080
EXPOSE 8009
RUN mkdir -p /var/app
ADD values.war /var/app
So that led us to think that the issue was with the directory and therefore we tried the following
FROM bitnami/tomcat
EXPOSE 8080
EXPOSE 8009
RUN ls -l /opt/bitnami/tomcat/data/
which gave the output
ls: cannot access /opt/bitnami/tomcat/data/: No such file or directory
when building the image
We think the issue is because the FROM image bitnami/tomcat uses that directory as a volume or such. This is probably the code to the original bitnami/tomcat image, though we are not sure.
https://github.com/bitnami/bitnami-docker-tomcat/blob/master/9.0/Dockerfile
Any ideas on how to add the file to the tomcat directory
309
COPY COMMAND ADD COMMAND. COPY is a docker file command that copies files from a local source location to a destination in the Docker container. ADD command is used to copy files/directories into a Docker image. Syntax: COPY <src> <dest>
ADD or COPY Consequently, the best use for ADD is local tar file auto-extraction into the image, as in ADD rootfs.tar.xz / . If you have multiple Dockerfile steps that use different files from your context, COPY them individually, rather than all at once.
According to the Dockerfile best practices guide, we should always prefer COPY over ADD unless we specifically need one of the two additional features of ADD. As noted above, using ADD to copy remote files into a Docker image creates an extra layer and increases the file size.
Sameer from Bitnami here.
The issue indeed is with the VOLUME's defined in the Dockerfile. We recognise this as a flaw in our Dockerfile and we are working towards fixing this issue in all our Dockerfiles.
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