failed to link 'share/terminfo/N/NCR260VT300WPP'

[pavelzw]

I want to run a docker container with pixi installed and a custom directory mounted as $HOME. This is not possible at the moment.

Dockerfile.test

FROM ubuntu:latest

RUN apt update && apt install -y curl
RUN curl -Ls https://github.com/prefix-dev/pixi/releases/latest/download/pixi-x86_64-unknown-linux-musl -o /usr/local/bin/pixi
RUN chmod +x /usr/local/bin/pixi

Steps to reproduce (I used macOS with M1 Pro)

❯ docker buildx build --platform linux/amd64 -t testimage --file Dockerfile.test .
[...]
❯ docker run --rm -it -v /tmp/test/4:/home/user testimage /bin/bash
root@5518e12f61e6:/# export HOME=/home/user
root@5518e12f61e6:/# cd /tmp
root@5518e12f61e6:/tmp# mkdir test
root@5518e12f61e6:/tmp# cd test
root@5518e12f61e6:/tmp/test# pixi init
Initialized project in /tmp/test/.
root@5518e12f61e6:/tmp/test# pixi add python
Added python 3.11.4.*
root@5518e12f61e6:/tmp/test# pixi install -vvv
[...]
DEBUG validating{path=/home/user/.cache/rattler/cache/pkgs/openssl-3.1.1-hd590300_1}:Connection{peer=Client}: h2::codec::framed_read: received frame=Data { stream_id: StreamId(3) }
DEBUG rattler::install: failed to create hard link in target directory: Cross-device link (os error 18). Disabling use of hard links.
DEBUG validating{path=/home/user/.cache/rattler/cache/pkgs/openssl-3.1.1-hd590300_1}:Connection{peer=Client}: h2::codec::framed_read: received frame=Data { stream_id: StreamId(3) }
DEBUG validating{path=/home/user/.cache/rattler/cache/pkgs/openssl-3.1.1-hd590300_1}:Connection{peer=Client}: h2::codec::framed_read: received frame=Data { stream_id: StreamId(3) }
DEBUG validating{path=/home/user/.cache/rattler/cache/pkgs/openssl-3.1.1-hd590300_1}:Connection{peer=Client}: h2::codec::framed_read: received frame=Data { stream_id: StreamId(3) }
DEBUG validating{path=/home/user/.cache/rattler/cache/pkgs/openssl-3.1.1-hd590300_1}:Connection{peer=Client}: h2::codec::framed_read: received frame=Data { stream_id: StreamId(3) }
DEBUG validating{path=/home/user/.cache/rattler/cache/pkgs/openssl-3.1.1-hd590300_1}:Connection{peer=Client}: h2::codec::framed_read: received frame=Data { stream_id: StreamId(3) }
error: failed to link 'share/terminfo/N/NCR260VT300WPP'

Caused by:
    0: could not open source file
    1: I/O error (os error 5)
DEBUG validating{path=/home/user/.cache/rattler/cache/pkgs/openssl-3.1.1-hd590300_1}:Connection{peer=Client}: h2::codec::framed_read: received frame=Data { stream_id: StreamId(3) }

[baszalmstra]

The log statement

DEBUG rattler::install: failed to create hard link in target directory: Cross-device link (os error 18). Disabling use of hard links.

indicates that rattler correctly discovered that hardlinks are not allowed.

The actual error seems to originate here:

https://github.com/mamba-org/rattler/blob/9973c760fa9b3c6895d320209e315a34731cde97/crates/rattler/src/install/link.rs#L222

Is readlink not allowed on a mounted docker volume?

[baszalmstra]

It looks like that is indeed an issue: https://stackoverflow.com/a/40322275

I guess using a copy fallback is then the only way..

[tdejager]

Confirmed that this also happens on my M1.

[baszalmstra]

After some more digging we have to go back to the drawing board on this one. It has nothing to do with either hardlinks or softlinks. It appears the error happens when opening the file or memory mapping it. The IO error 5 likely indicates a permission denied error. I also cannot reproduce this in WSL. @ruben-arts will check under Linux.

[baszalmstra]

I assume that since the cache is actually filled, reading and writing from the mounted volume does work. So this would indicate that the error occurs when memory mapping the file.

[tdejager]

It works for me when I remove the --platform flag to build an apple silicon oci image. Somehow the error does not occur.

[baszalmstra]

I created a PR for rattler to add some more error information. Hopefully that allows us to pinpoint the error a little better: mamba-org/rattler#273

[baszalmstra]

After some more debugging, we figured out that the issue was that the specific package that failed (ncurses-6.4-h2e1726e_0) contains both the file ncr260vt300wpp and NCR260VT300WPP. Since the macOS filesystem is case insensitive (different from Linux) and is mounted in the docker container, both files cannot exist simultaneously.

This is a macOS-specific issue that only occurs when mounting a docker volume into a Linux-based docker container and installing packages that expect a case-sensitive filesystem. Because of this pixi (or rattler) will never be able to install such a package in this scenario correctly. So I'm closing this issue.

Thanks for the patience and help @pavelzw !

[sg-s]

@baszalmstra what was the resolution to this? i think i'm running into the exact same issue:

• running a docker container with linux/amd64 on macOS (arm64)
• see this: failed to link ncurses-6.5-h0425590_0.conda

i tried dropping the --platform arg but that didn't do anything

[baszalmstra]

I think as long as both the cache and the pixi environment are not installed on mounted volumes (so on a case sensitive volume) it should work.

[sg-s]

yes, thank you, i was about to say this too. for future readers:

this fix is to make sure the mounted volume is case-sensitive. if you're on macOS, you need to make a new volume, and use that to mount into docker