tigerquoll commented on issue #1501: Metron-2246 rpm-docker - minimise use of bind mounts due to performance URL: https://github.com/apache/metron/pull/1501#issuecomment-528137707 @mmiklavc Fair question. During the maven prepare phase for the packaging project, the jars from all of the metron sub-project target directories get copied into the rpm-docker/SOURCES directory. This then becomes the source of the new docker image. Docker keeps track (i.e. checksums) all of the source data used to build each step of a docker image (This is called the docker context). When you rebuild a docker image, docker compares the checksums to the source data, and skips the build process if nothing in the docker context of that image has changed. The rpm-docker build process builds both docker images *every* times it runs. Most times the first image has no changes in its source files, so the build is skip. The second build process (the one that embeds Metron jars) will actually skip as well if none of the Metron source jars have changed. (bonus optimisation!). This "keeping track of docker contexts" is fundamental to how the docker process changes, and has been validated and tested by everyone who utilises docker files.
---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
