WARNING: updating and opening https://dl-cdn.alpinelinux.org/alpine/v3.19/main: Permission denied

[otonoton]

Has this issue been opened before?

• [x] It is not in the FAQ, I checked.
• [x] It is not in the issues, I searched.

Describe the bug

Trying to build the download profile fails with Permission denied, even when running as root. Docker daemon is also running as root.

root@box# docker compose --profile download up --build
[+] Building 126.7s (6/8)                                                                                                                                                                                                                                                               docker:default
 => [download internal] load build definition from Dockerfile                                                                                                                                                                                                                                     0.1s
 => => transferring dockerfile: 185B                                                                                                                                                                                                                                                              0.0s
 => [download internal] load metadata for docker.io/library/bash:alpine3.19                                                                                                                                                                                                                       2.5s
 => [download internal] load .dockerignore                                                                                                                                                                                                                                                        0.1s
 => => transferring context: 2B                                                                                                                                                                                                                                                                   0.0s
 => CACHED [download 1/4] FROM docker.io/library/bash:alpine3.19@sha256:890897682a8025c1e178b5ec6126b3b532ad8535f1e81dbf60bc2b7300b1bcf8                                                                                                                                                          0.0s
 => [download internal] load build context                                                                                                                                                                                                                                                        1.1s
 => => transferring context: 3.15kB                                                                                                                                                                                                                                                               0.0s
 => ERROR [download 2/4] RUN apk update && apk add parallel aria2                                                                                                                                                                                                                               123.5s
------                                                                                                                                                                                                                                                                                                 
 > [download 2/4] RUN apk update && apk add parallel aria2:                                                                                                                                                                                                                                            
1.241 fetch https://dl-cdn.alpinelinux.org/alpine/v3.19/main/x86_64/APKINDEX.tar.gz                                                                                                                                                                                                                    
62.00 fetch https://dl-cdn.alpinelinux.org/alpine/v3.19/community/x86_64/APKINDEX.tar.gz                                                                                                                                                                                                               
62.00 WARNING: updating and opening https://dl-cdn.alpinelinux.org/alpine/v3.19/main: Permission denied
123.4 WARNING: updating and opening https://dl-cdn.alpinelinux.org/alpine/v3.19/community: Permission denied
123.4 4 unavailable, 0 stale; 18 distinct packages available
------
failed to solve: process "/bin/sh -c apk update && apk add parallel aria2" did not complete successfully: exit code: 4

No proxy, VPN, firewall or other known network issues. Internet access is working normally on the box.

Hardware / Software

• OS: Ubuntu
• OS version: 22.04.5 LTS
• Docker Version: 27.3.1
• Docker compose version: v2.29.7
• Repo version: from master
• RAM: 128GB
• GPU/VRAM: NVIDIA RTX 3070 Ti

Steps to Reproduce

1. Clone repo from master
2. Run docker compose --profile download up --build
3. Build fails with "Permission denied" errors