Build¶
build context
pass value to ARG:
--build-arg NAME=my-app
build an image¶
docker build https://github.com/dev/test.git#<branch>:<docker-dir>
docker build . --no-cache --force-rm -t docker.example.com/image-name:linux
docker build . -f ./docker/linux/my-dev.docker --platform linux/amd64 -t 1.0.1
--no-cached: do not use cached intermediate layers and regenerate them as well--rm: remove intermediate containers after a successful build--force-rm: those intermediate containers would always been removed even in case of an unsuccessful compilation-t --tag: name and optionally a tag in thename:tagformat
Note that the dot is the context. When doing a docker build,
the files from your local context are sent to the daemon, and put in a temporary directory;
that temporal directory is used to build the image (the actual build is performed on the daemon side).
paths in a Dockerfile are always relative to the the context directory
multistage build¶
Multi-stage build is a feature introduced in Docker 17.05. Multistage build can reduce docker image size.
https://collabnix.com/getting-started-with-docker-multi-stage-builds/
https://www.docker.com/blog/advanced-dockerfiles-faster-builds-and-smaller-images-using-buildkit-and-multistage-builds/
COPY failed: stat /var/lib/docker/tmp/docker-builder/xxxx no such file or directory¶ the current context is not correct
the directory not in the current context folder
the directory was in .dockerignore file so it was not copied to the builder folder
the docker daemon doesn't have sufficient rights or space to create the temporary directory and files
there's a bug in the directive that fails to place the expected files from 'current context' to into the temporary directory
how to show the created date of the based image in dockerfile?¶
command output from dockerfile¶
cat output will show in the output
enable command output¶
will also force not using cache
or set
the current context is not correct
the directory not in the current context folder
the directory was in
.dockerignorefile so it was not copied to the builder folderthe docker daemon doesn't have sufficient rights or space to create the temporary directory and files
there's a bug in the directive that fails to place the expected files from 'current context' to into the temporary directory
how to show the created date of the based image in dockerfile?¶
command output from dockerfile¶
cat output will show in the output
enable command output¶
will also force not using cache
or set