[Dune-devel] Update on Docker CI build system

[Simon Praetorius]

Hi everyone,

It took me several days/weeks to figure out how to fix the Docker image 
auto-build system, but I eventually managed to do so. The CI images are 
now being built automatically again in the docker-ci CI system. In this 
process, I also added the 2.11 release images and updated the git 
images. What is new is the management of the registry using the tool 
regctl (https://regclient.org/) as also recommended in the gitlab docs.

What is not yet built automatically are the Linux base images. These do 
not need updates very often. I tried to build them in the CI, but this 
failed most of the time (e.g., due to timeouts, memory limits being 
reached, broken internet connections, packages not downloading, or other 
issues). Therefore, I decided not to build them in the CI for now. They 
can still be updated using the Python scripts in the docker/ci 
repository. Instructions for this can be found in the README.

For each Dune release version, there is a default Docker image, e.g., 
dune:2.11, with one selected default toolchain. The exception is 
dune:git, where there are additional tags representing the default 
toolchains with GCC or Clang compilers: dune:git-gcc, dune:git-clang, 
and dune:git-clang-libcxx. These extra tags are intended for users who 
always want to test with the latest Dune version and multiple compilers.

The nightly/weekly builds will be activated soon. I plan to follow the 
strategy of rebuilding dune:git nightly and dune:2.11 weekly. (In the 
future, we might also activate triggered rebuilds when pushing to the 
releases/2.11 branches in the core modules.)

What I would like to ask is whether the special images dune-pdelab:2.10 
and dune-pdelab-deps:2.10 are still needed, or whether we could drop 
them from the automatic CI build.

Best,
Simon

-- 
Dr. Simon Praetorius
Technische Universität Dresden
Institute of Scientific Computing
phone: +49 351 463-34432
mail: simon.praetorius@​tu-dresden.de

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