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Comment on How do I stop Docker trying to pull from IPv6?

tychosmoose@piefed.social ⁨3⁩ ⁨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?

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Zagorath@aussie.zone ⁨3⁩ ⁨days⁩ ago
Whatever the latest version of Raspbian was a month or two ago when I installed it. uname -a outputs […]6.12.25+rpt-rpi-v8[…]. /etc/os-release contains “Debian GNU/Linux 12 (bookworm)”.

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- tychosmoose@piefed.social ⁨3⁩ ⁨days⁩ ago
  Ok, so it's probably using NetworkManager. I would try disabling it in /etc/NetworkManager/NetworkManager.conf by adding a block like:
  
  [ipv6] addr-gen-mode=stable-privacy method=disabled
  
  Then sudo systemctl restart NetworkManager.
  Can't say for sure if this will work. I dislike using NetworkManager on my servers so I can't test if this works. But hopefully the before/after of ip addr is different.
  
  Although it looks like your ip addr output posted an hour or so ago doesn't show any ipv6 addressing. Maybe the problem is solved now.
  
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  - Zagorath@aussie.zone ⁨2⁩ ⁨days⁩ ago
    Unfortunately not.
    
    docker run hello-world 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 Run 'docker run --help' for more information
    
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    tychosmoose@piefed.social ⁨2⁩ ⁨days⁩ ago
    Well crap. Do you have no ipv6 address now in ip addr?
    
    Guess I gave Docker too much benefit of the doubt and assumed it should failover to v4 once v6 was disabled. Bad assumption on my part.
    
    Could it be a DNS problem? If you dig registry-1.docker.io +short does it return an ipv4 or v6 address?
    
    It looks like there have been sporadic reports of problems from people since last year.
    
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