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?
I never set one up myself, and this 11 year-old thread implies that Raspbian doesn’t have one set up by default. It is a very old thread though, so could be wrong.
edit: this is more recent and also says Raspbian doesn’t have DNS caching by default
At this point I am assuming that it is actually a docker issue.
Can you show your docker daemon configuration?
Hard to tell where it is on your machine. Try ~/.docker/daemon.json, or maybe /etc/docker/daemon.json… Else look for it haha
There’s a ~/.docker/config.json. In that there’re some auths, with keys
https://index.docker.io/v1/,https://index.docker.io/v1/access-token, andhttps://index.docker.io/v1/refresh-token, and then there’s"currentContext": "rootless".There’s ~/.docker/contexts/meta/[a long hex string]/meta.json, with
{"Name":"rootless","Metadata":{"Description":"Rootless mode"},"Endpoints":{"docker":{"Host":"unix:///run/user/1000/docker.sock","SkipTLSVerify":false}}}.The only file in /etc/docker is key.json.