It suffices to use the ** pattern. For example: .dockerignore **/.git The relevant passage from that page of the official doc is: .dockerignore file […] Matching is done using Go’s filepath.Match rules. A preprocessing step removes leading and trailing whitespace and eliminates . and .. elements using Go’s filepath.Clean. Lines that are blank after preprocessing … Read more
For building single docker images: Set your environment variable using the command line or modifying your .bashrc or .zshenv file. (introduced in v19.03.0 in 03/2019) export DOCKER_DEFAULT_PLATFORM=linux/arm64 Alternatively, in the Dockerfile, include the following flag in the FROM command (for a multi-stage Dockerfile build, the flag is only needed for the first stage): FROM –platform=linux/arm64 … Read more
ARG is for setting environment variables which are used during the docker build process – they are not present in the final image, which is why you don’t see them when you use docker run. You use ARG for settings that are only relevant when the image is being built, and aren’t needed by containers … Read more
You should use the ARG directive in your Dockerfile which is meant for this purpose. The ARG instruction defines a variable that users can pass at build-time to the builder with the docker build command using the –build-arg <varname>=<value> flag. So your Dockerfile will have this line: ARG request_domain or if you’d prefer a default … Read more
You got 3 options: The “ARG” solution, the “base” solution, and “file” solution. ARG version_default=v1 FROM alpine:latest as base1 ARG version_default ENV version=$version_default RUN echo ${version} RUN echo ${version_default} FROM alpine:latest as base2 ARG version_default RUN echo ${version_default} another way is to use base container for multiple stages: FROM alpine:latest as base ARG version_default ENV … Read more
I figured out: the flag –chmod is a new feature from Docker Buildkit, so it is necessary to run the build enabling it via: DOCKER_BUILDKIT=1 docker build ./ However, it is really not clear why Docker swallows the –chmod option without any error or warn about the non-existing option 😕.
Per https://docs.docker.com/config/containers/logging/configure/ it suggests to: Restart Docker for the changes to take effect for newly created containers. Existing containers do not use the new logging configuration. Unfortunatelly docker build doesn’t support –log-opt max-buffer-size=XXXm, but buildx does As “the last shoot”, you can remove –progress plain if you don’t acutally need it
It is not something about order. The Dockerfile must be specified with -f docker build -f Dockerfile.cpu -t ibot-cpu -m 4g . However, take into account that by default docker does not limit the container memory. It can take the whole free memory. As I can see that you are on OSX, which runs docker … Read more
If you left it blank in your new Dockerfile, it will inherit the one from the base image. For example: base FROM ubuntu CMD [“echo”, “AAA”] layer1 FROM base If you build above images and run layer1 you will get the following: $ sudo docker run -it layer1 AAA
Reading through When using BuildKit with Docker, how do I see the output of RUN commands? the reason for the changed output format is that instead of the “classic” docker build a new feature named “buildkit” is now being used instead. Method 1 (taken from above questions answers) Use docker build –progress=plain . to see … Read more