I’m currently trying to install Docker on my old Raspberry Pi (3 Model B+) to host some personal projects. When I run docker run hello-world, I get:
Unable to find image 'hello-world:latest' locally docker: Error response from daemon: Get "https://registry-1.docker.io/v2/library/hello-world/manifests/sha256:ec153840d1e635ac434fab5e377081f17e0e15afab27beb3f726c3265039cfff": dial tcp [2600:1f18:2148:bc00:eff:d3ae:b836:fa07]:443: connect: network is unreachable
My Internet connection does not support IPv6 at all, which would explain why this error occurs. But how do I force docker-pull to only use IPv4?
tychosmoose@piefed.social 2 days ago
Docker is a distraction in your problem description.
It's like if you asked why the top gear in your car isn't working and gave the model of car and engine type and gearbox. But it's really that you're stuck in slow traffic. Focus on the road name and destination to find a faster route.
For your problem, search for how to disable ipv6 for the Linux distribution and version that you have installed. You will find lots of guidance. Or share those details here for someone to help.
Or, better might be to see if there is a way to get ipv6 tunneling working on your connection. It may be possible even if the ISP is unhelpful.
Zagorath@aussie.zone 2 days ago
Except if I try and access the same domain using curl, it works fine. For some reason, Docker specifically is what’s failing.
tychosmoose@piefed.social 2 days ago
Different programs have different defaults.
But in your situation which would be more helpful - prevent this one docker command from using ipv6 (likely more difficult), or preventing all commands from using your broken ipv6 config (likely easier)?
I have no idea about the first. Maybe some people know this detail. But I'm sure that with a distro and version that you're running, there are lots of people who could help with the second. Raspberry Pi 3B+ is the hardware. What software are you using?