Software can be installed with the help of the helper script. A typical Dockerfile would be:
FROM docker.io/finkandreas/spack:0.19.1-ubuntu22.04 as builder
ARG NUM_PROCS
RUN spack-install-helper \
daint-mc \
"trilinos@13.4.0 cxxstd=17 +amesos2 +belos ~epetra +intrepid2 +mumps +openmp +suite-sparse +superlu-dist +shards +nox" \
"petsc +hypre ~complex +mumps +openmp +suite-sparse +superlu-dist" \
"slepc ~arpack" \
"hypre" \
"cmake" \
"py-numpy" \
"swig" \
"git" \
"yaml-cpp" \
"openblas" \
"suite-sparse@5.13.0"
# end of builder container, now we are ready to copy necessary files
# copy only relevant parts to the final container
FROM docker.io/finkandreas/spack:base-ubuntu22.04
# it is important to keep the paths, otherwise your installation is broken
# all these paths are created with the above `spack-install-helper` invocation
COPY --from=builder /opt/spack-environment /opt/spack-environment
COPY --from=builder /opt/software /opt/software
COPY --from=builder /opt/._view /opt/._view
COPY --from=builder /etc/profile.d/z10_spack_environment.sh /etc/profile.d/z10_spack_environment.sh
# Some boilerplate to get all paths correctly - fix_spack_install is part of the base image
# and makes sure that all important things are being correctly setup
RUN fix_spack_install
# Finally install software that is needed, e.g. compilers
# It is also possible to build compilers via spack and let all dependencies be handled by spack
RUN apt-get -yqq update && apt-get -yqq upgrade \
&& apt-get -yqq install build-essential gfortran \
&& rm -rf /var/lib/apt/lists/*