Executing a command in a machine

Questions / Help
1

This is my Dockerfile

# Use the official Julia image
FROM julia:1.9
ENV JULIA_CPU_TARGET="generic;sandybridge,-xsaveopt,clone_all;haswell,-rdrnd,base(1)"

# # Install Julia dependencies
RUN julia -e "using Pkg; Pkg.add([\"CSV\", \"DataFrames\", \"Dates\", \"CairoMakie\"])"
RUN julia -e "using Pkg; Pkg.precompile();"

# install python
RUN apt-get update && apt-get install -y \
    python3 \
    python3-pip \
    && rm -rf /var/lib/apt/lists/*

CMD ["julia"]

I am using this image in my fly machine.

when i ssh into the machine, I can access those julia packages but if i call the exec on the machine with the command julia demo.jl, I get ERROR: LoadError: ArgumentError: Package CSV not found in current path. - Run import Pkg; Pkg.add("CSV") to install the CSV package. error

I know this is happening because when using exec it is using non interactive shell. What can I do here now?

2

My guess is that this is due to differences in environment variables, user ID, and the current working directory—rather than an absence of an interactive REPL, per se.

For example…

$ fly m exec 3d* 'bash -c "whoami && printenv HOME && pwd"'
root
/
/

Versus…

$ fly m exec 3d* 'runuser --login root -c "whoami && printenv HOME && pwd"'
root
/root
/root

The runuser command isn’t a panacea, e.g., it clears most environment variables by default, but it’s what I try first when bumping into a “I really want this to be like a login shell instead” situation…

Aside: If you just need to set HOME or JULIA_LOAD_PATH or similar, then env HOME=/root julia demo.jl is a lighterweight alternative.

1 Like
3

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.