How to pull docker image in a pure IPv6 host?
Docker Hub does NOT support IPv6!!!!! In Dec 2020, docker hub only supports IPv4, and that's sad! $ docker pull nginx Using default tag: latest Error response from daemon: Get https://registry-1.docker.io/v2/: dial tcp 52.4.20.24:443: connect: network is unreachable But I need to pull images from docker hub, what should I do? Proxy! Yes, all we need is a HTTP proxy. Basically, I setup a HTTP proxy in another DUAL stack host (a host with both IPv4&IPv6), and ask the docker to use it. HOW-TO 1. install proxy I use goproxy . Download, extract, start proxy. By default, it listens on 33080. $ ./proxy http --debug --debug is for verbose information, drop it if everything goes well. 2. tell docker to use the proxy $ sudo systemctl edit docker.service and add the following to the file.. [Service] Environment="HTTP_PROXY=http://[Dualstack_IPv6]:33080" Environment="HTTPS_PROXY=https://[Dualstack_IPv6]:33080" # reload to read the changes $ sudo systemctl daemon-reload ...